Stainless steel tank and vessel fabricators for hygienic, food-grade, pharma, and industrial process service.

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    Matched providers: 42

    Top countries: United Kingdom, China

    Popular technologies: Bag Filters, Band Screens

    Stainless Steel Water Storage Tanks: Grade Selection, Fabrication, and Hygienic Standards

    Stainless steel tanks for water storage and process applications offer superior corrosion resistance, hygienic surface finish, and long service life compared to carbon steel or plastic alternatives. Common grades: Grade 304 (AISI 304, EN 1.4301, 18 percent Cr, 8 percent Ni, max 0.08 percent C): suitable for clean potable water storage, rainwater, and most process water; not recommended for chloride-rich water (greater than 200 mg/L Cl-) or coastal environments. Grade 316L (AISI 316L, EN 1.4404, 16 to 18 percent Cr, 10 to 14 percent Ni, 2 to 3 percent Mo, max 0.03 percent C): superior chloride resistance (Pitting Resistance Equivalent PRE = 26 to 28); suitable for seawater service, brine, saline water, chlorinated process water up to 500 to 1,000 mg/L Cl-; widely used for potable water storage, chemical dosing, pharmaceutical, and food/beverage applications. Duplex 2205 (EN 1.4462, 22 percent Cr, 5 percent Ni, 3 percent Mo, PRE greater than 35): highest chloride resistance; seawater desalination, offshore, high-salinity process water. Surface finish: BA (bright annealed), 2B (cold rolled), No. 4 (brushed), electropolished (EP, Ra less than 0.8 micron) - EP required for pharmaceutical/UPW tanks.

    Hygienic stainless steel tank design and fabrication for potable water: WRAS Approval required for all tanks in contact with potable water in the UK; materials must comply with BS 6920 (Suitability of non-metallic products for use in contact with water intended for human consumption) and the Drinking Water Inspectorate (DWI) Regulation 31 approval process. Tank fabrication: TIG (GTAW) welding with full penetration welds, weld bead polished to Ra less than 3.2 micron for exposed surfaces (Ra less than 0.8 micron for pharmaceutical); full pickling and passivation after fabrication (HNO3 30 percent solution or citric acid 10 percent, contact 30 to 60 minutes at 20 to 50 degrees C) to restore passive layer damaged by welding. BS EN ISO 17672 specifies filler metal selection; weld inspection per BS EN ISO 5817 (fusion welding quality levels). Hygienic design principles (EHEDG guidelines, 3-A Sanitary Standards): all interior surfaces accessible for cleaning; no dead legs greater than 2 times pipe diameter; crevice-free joints; sloped bottoms (minimum 1:100) for self-draining; vents with hygiene filters (HEPA or 0.2 micron membrane); sight glasses, level gauges per EHEDG Type EL.

    Stainless steel tank standards and sizing for water applications: BS EN 14015:2004 (Site built, vertical, cylindrical, flat-bottomed above ground welded metallic tanks for the storage of liquids at ambient temperature): for large site-built tanks (greater than 5 m diameter), covers material, welding, inspection, and testing. BS EN 13458 (Cryogenic vessels, static) and BS EN 14620 (Field erected vertical cylindrical flat-bottomed tanks for refrigerated liquefied gases at atmospheric pressure) for specialised water/wastewater storage. AWWA D100 (Welded Carbon Steel Tanks for Water Storage) and AWWA D103 (Factory-Coated Bolted Carbon Steel Tanks) - US standards commonly referenced. Thermal insulation: polyurethane foam (40 to 60 kg/m3, lambda 0.025 W/mK) applied externally with stainless steel cladding for hot or cold water storage; prevents Legionella growth in cold water (target less than 20 degrees C) and heat loss in hot water tanks (target greater than 60 degrees C). Sectional stainless steel tanks (GRP-lined or pure SS panels, Titan Eco, Balmoral): installed in restricted-access plant rooms without crane access; panels bolted together on site with butyl or EPDM joint seals; suitable for 1,000 to 5,000,000 litre installations.

    Frequently Asked Questions

    What grade of stainless steel is used for water tanks?

    Grade selection for stainless steel water tanks: (1) Grade 304 (1.4301): suitable for potable cold water storage in temperate climates, rainwater, process water with chloride less than 200 mg/L; most economical stainless option; not suitable for coastal/marine environments or high-chloride water; (2) Grade 316L (1.4404): preferred for potable water where chlorides may be elevated (coastal supplies, desalinated water blends, softened water with residual NaCl); suitable for pharmaceutical, food grade, and chemical applications; higher Ni and Mo content provides pitting resistance; (3) Grade 2205 duplex (1.4462): highest corrosion resistance, for seawater, brine, very high chloride process water; higher cost, more difficult to weld; (4) Grade 321 (1.4541): titanium-stabilised 304, for high-temperature applications (greater than 400 degrees C); rarely needed for water tanks. UK WRAS approved installations: both 304 and 316L are acceptable for potable water; 316L specified by many water utilities as standard for potable storage due to greater margin against chloride pitting in recirculating hot water systems (Legionella risk at elevated Cl-). DWI Regulation 31 approval: tank manufacturer must hold WRAS/DWI approval for the specific tank range, not just the material grade.

    What capacity of stainless steel tank do I need?

    Water storage tank sizing depends on the application and demand pattern: (1) Potable water storage (buffer/break tank): minimum 1 hour peak demand at design flow rate for buildings; hospitals and critical facilities: 24 to 48 hours reserve storage; Approved Document G (Part G, Building Regulations 2010) does not prescribe tank volume but requires adequate cold water storage; BS EN 806-2 (Design for water installations) recommends 24-hour storage for cold water cisterns in commercial buildings; (2) Fire fighting: BS EN 12845 (fixed firefighting systems), BS 9990 (dry riser), or BS 9251 (sprinkler systems) specify tank volume based on hazard classification: OH3 sprinkler risk requires typically 100 to 200 m3 minimum, high hazard (HH) 300 to 1,000 m3; (3) Process water: size to buffer production rate vs supply rate, typically 30 minutes to 4 hours production demand; (4) Rainwater harvesting: calculated per BS 8515 (demand vs rainfall balance over annual cycle); (5) Cooling tower make-up: 24 to 48 hours evaporation loss storage. Physical sizing: volume = plan area times height; practical stainless tank heights 1.5 to 5 m; circular plan most efficient per unit volume; flanged cylindrical or rectangular sectional.

    How are stainless steel water tanks cleaned and disinfected?

    New tank commissioning (BS 8558:2015, Guide to the design, installation, testing and maintenance of services supplying water for domestic use): (1) Inspect interior surfaces for debris, weld spatter, or surface contamination; (2) Flush tank with clean water; (3) Fill with potable water containing minimum 50 mg/L free chlorine (as sodium hypochlorite solution); allow 1-hour contact time for new tanks or after maintenance; (4) Drain and flush with mains water until residual free chlorine is less than 0.5 mg/L (or less than 1 mg/L, depending on system); (5) Bacteriological sampling: 2 consecutive samples at least 24 hours apart, no detectable E. coli or total coliforms (BS EN ISO 9308-1); (6) Commission supply. Routine maintenance (BS 8558, Legionella COSHH ACoP L8): tank inspection annually for cold water (HSE L8 Legionella guidance); thorough inspection and cleaning every 2 to 3 years: drain, clean walls and base with food-grade detergent, inspect for corrosion, pitting, weld defects, biofilm; disinfect per BS 8558 before refilling. Stainless steel passivation maintenance: if pitting or tea staining observed, re-passivate with 10 percent citric acid solution. Hot water primary storage (calorifiers, buffer vessels): maintained at greater than 60 degrees C per L8 Legionella guidance; monthly sentinel outlet temperature checks; annual drain and inspection.

    What is the lead time for a custom stainless steel tank?

    Lead times for stainless steel tanks vary significantly by type and size: Sectional stainless steel tanks (factory-manufactured panels, site-assembled): typically 6 to 12 weeks from order to site delivery; panels are standard dimensions (600 mm x 600 mm standard, 1200 x 600, 1200 x 1200), allowing rapid production of standard configurations; bespoke configurations (non-standard dimensions, complex baffling, access arrangements) add 2 to 4 weeks. Cylindrical tank (factory fabricated, complete): 4 to 10 weeks for standard sizes up to 10,000 L; 10 to 20 weeks for large custom tanks 10,000 to 100,000 L. Site-built rectangular or cylindrical tanks (greater than 50,000 L): site fabrication typically 4 to 12 weeks on site after material lead time of 6 to 10 weeks for specialist 316L or duplex plate - overall 14 to 22 weeks from order. Expediting options: ex-stock tanks (standard sizes) available for immediate delivery from distributors; GRP-lined carbon steel sectional tanks as interim solution while SS fabricated. For WRAS/DWI-approved tanks, confirm that the specific manufacturer's tank range (not just material) holds current approval; approval renewal is annually or biennially with some certification bodies.

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    Stainless Steel Tank Companies

    Stainless steel tank and vessel fabricators for hygienic, food-grade, pharma, and industrial process service.

    42 providers

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    Find a Stainless Steel Tank Provider

    Showing 1-20 of 42

    42 results from 42 matched providers

    Ecosystems International logo

    Ecosystems International

    Verified
    Indonesia51-200 employees
    Flat Sheet Microfiltration Units · Hollow Fiber MF Systems · Ceramic Microfiltration Modules +80 more
    apac · china · europe +3 more

    PT Ecosystems International (PT ESI) was established at Jakarta on 21st November 2006. We are an industrial effluent treatment systems integrator specializing in electrocoagulation (EC), a unique waste water treatment profile. PT ESI has capabilities in designing complete waste water treatment solutions by combining various effluent treatment systems such as the electro-coagulation, biological, chemical processes and membrane filtration, offering its customers a wide and comprehensive range of solutions, tailored to suit their various needs – ranging from basic effluent treatment for discharge to effluent recycling for water reuse. The Company is experienced in handling the design, engineering, procurement, construction and operation of new Effluent Treatment Plants (“ETP”) and possesses expertise in retrofitting existing ETP to increase the flow rate and treatment capability without any major infrastructure increase PT ESI is also a premier waste water treatment service company specializing in handling waste water generated from Exploration (Drilling) and Produced Water. Customers in Indonesia include major Oil & Gas companies such as Pertamina, Exxon, Chevron, Petro-China and Medco. Operations in Indonesia are provided by both mobile and fixed units. At drill sites where waste-water recycling is required, PT ESI supplement these treatment units with skid mounted mobile Reverse Osmosis systems. The technologies and solutions employed by PT ESI are developed in-house and examples of these are its proprietary Trident™ Electro Contaminant Removal (“ECR”) system, the Stage Contaminant Removal (“SCR”) process and Mobile On-Site Waste-Water Treatment (“OWT”) units

    Reverse Osmosis (RO) Systems
    Ultrafiltration (UF) Systems
    Multi-media Filtration (MMF) Systems
    +63 more
    agriculture
    manufacturing
    Alfa Water srl logo

    Alfa Water srl

    Italy51-200 employees
    Screening · Coarse Bar Screens · Fine Screens +4 more
    europe

    Alfa Water Srl is an Italian company with strong experience in designing and manufacturing all types of manual and automatic screen filters. We have invested our collective experience in water filtration to produce world-class solutions and products in stainless steel, super alloys and advanced materials. In addition to our deep knowledge in water filtration, Alfa Water Srl designs and manufactures a wide range of screen filters for the removal of suspended solids from water.

    Ultrafiltration (UF)
    Microfiltration (MF)
    Construction and Installation
    Utilities
    Manufacturing
    PNR ITALIA Srl logo

    PNR ITALIA Srl

    Verified
    Italy51-200 employees
    Spray Evaporator · Self-cleaning Screen Filters
    apac · europe · latam +2 more
    19 case studies

    We produce a comprehensive range of spraying solutions, encompassing everything from small-scale nozzles to large industrial spraying systems. Our diverse product line includes various types of nozzles tailored to meet the specific requirements of every application and customer need. The company was established in Milan in November 1968, focusing on distributing parts and components for fire protection systems. Over time, we expanded our offerings to include a diverse range of industrial sprayers tailored to various applications. In addition to our distribution and manufacturing of fire protection system components and industrial sprayers, we specialize in designing and producing pneumatic spray nozzles for industrial use and tank washing nozzles. Our product line also encompasses a variety of complementary accessories essential for industrial washing, including filters, spray guns, and hoses. Furthermore, we offer ejectors, blower nozzles, swivel joints, and hose clamps to provide comprehensive solutions for our customers' needs. PNR Italia is part of the Tecomec Group and oversees four other affiliated companies to form PNR Company, a consolidated reality with a significant presence on the market.

    Microfiltration (MF) Systems
    Disinfection Technologies
    Disinfection Chemicals
    +7 more
    agriculture
    manufacturing
    ZT

    Zhejiang Tankpro Industry Co., Ltd.

    China51-200 employees
    Reverse Osmosis (RO)
    apac · china

    Zhejiang Tankpro Industry Co., Ltd. is a leading manufacturer in China, specializing in the production of steel and plastic RO pressure water storage containers. With certifications from EU RoHS and US NSF, the company is committed to delivering high-quality products backed by professional technology from Taiwan.

    Storage Tanks and Reservoirs
    Manufacturing
    Utilities
    Changde City Tianlun Precision Casting Co.,Ltd logo

    Changde City Tianlun Precision Casting Co.,Ltd

    China51-200 employees
    Filtration
    China · Asia-Pacific (APAC)

    Changde City Tianlun Precision Casting Co., Ltd, operating under the brand Sento Faucets, specializes in the manufacturing of high-end, tailor-made stainless steel faucets and water filtration dispenser taps, serving the construction and real estate industries in China and the Asia-Pacific region.

    Manufacturing
    Construction and Real Estate
    FS

    FAM S.n.c. Water Technologies

    Italy51-200 employees
    europe

    FAM S.n.c. Water Technologies has been a leader in water technology for over 20 years, specializing in stainless steel solutions for water treatment, purification, and filtration systems. Serving diverse industries, the company provides advanced equipment and technology solutions across Europe.

    Reverse Osmosis (RO)
    Ultrafiltration (UF)
    Construction and Installation
    Construction and Real Estate
    Manufacturing
    SITA Srl logo

    SITA Srl

    Italy51-200 employees
    Low-Pressure UV Disinfection Units · Medium-Pressure UV Systems for NOM Breakdown · UV/Chlorine Systems +2 more
    europe

    SITA Srl, based in Italy, is a leading manufacturer of UV disinfection units and stainless steel filter containers. With a focus on sustainable water treatment solutions, SITA offers innovative UV technology as an eco-friendly alternative to chlorine, serving diverse industries since 1982.

    UV Disinfection
    Utilities
    Healthcare
    Bona Water Purification logo

    Bona Water Purification

    China1-50 employees
    Cartridge Filters · Bag Filters · Pressure Filters +1 more
    china

    Bona Water Purification specializes in manufacturing stainless steel water filter housings, providing essential components for effective water filtration and treatment systems. Based in China, they cater to various industries, ensuring clean and safe water solutions.

    Bag and Cartridge Filtration
    Construction and Installation
    Utilities
    Manufacturing
    Eromes logo

    Eromes

    Netherlands51-200 employees
    Band Screens · Screening · Bag Filters +1 more
    europe

    Eromes specializes in the manufacturing of stainless steel products for (wastewater) treatment and process industries. Eromes supplies, among other things, screens, filters, containers, screw conveyors, and sluices.

    manufacturing
    chemicals-pharmaceuticals
    Hydroo Pump Industries,SL logo

    Hydroo Pump Industries,SL

    Spain51-200 employees
    Filtration
    china · europe

    Hydroo Pump Industries, SL is a leading manufacturer of efficient stainless steel pumps, offering a wide range of solutions including vertical multistage, high pressure, and submersible pumps. Based in Spain, Hydroo serves diverse markets across Europe, Asia-Pacific, and China, focusing on manufacturing, construction, and utility sectors.

    High-Efficiency Pumps and Motors
    Smart Pumping Systems
    Manufacturing
    Construction and Real Estate
    Industrial Pipework Services logo

    Industrial Pipework Services

    United Kingdom

    At Industrial Pipework Services, we provide bespoke engineering services. With over 25 years’ experience IPS can offer complete mechanical engineering solutions including design, manufacture & installation services. Our experienced workforce are trained to the highest standards. IPS is situated within easy access to the M4 corridor approximately 30 minutes North of Cardiff. The company embraces innovative thinking while utilising the latest technology. IPS operating base comprises of 30,000 square foot of workshops, offices and assembly areas.  The Workshops are fully segregated for the manufacture of both carbon steel and stainless-steel products and are serviced by dedicated overhead gantry cranes. With over two decades of engineering experience the company strives to combine first class engineering and design to deliver the high quality that is required.  The Company maintains a proactive approach, working closely with our Clients to achieve our collective aims for each scheme. This ambition is underpinned by an uncompromising commitment to attain the highest standards of health, safety and environmental care. IPS provides continued excellence in design, manufacturing and installation gained from many years experience within the industry. Our In-House design capability allows the company to provide a full engineering design service using the latest Auto CAD software packages. IPS offers a design service for both pipework and steelwork systems from proposal drawings to the production of as built drawings. IPS Design Office provides all relevant AutoCAD drawings for steelwork and pipework, Isometric drawings for fabrication, general layout drawings for plant and equipment and As Built drawings. Structural steelwork calculations and flow characteristics are also provided as required. IPS offer a full 3D surveying services and production of cloud point data for project modelling. IPS operates primarily within the Water Industry and provides services for both clean water and sewage. IPS is a Tier One Mechanical Engineering Specialists Provider to Dŵr Cymru Welsh Water and the Strategic Alliance. IPS operate nationally and have delivered projects throughout the UK for many Water Utility companies including Anglian Water, Thames Water and Bristol Water. Continual improvement into our infrastructure and the development of new IT systems has brought us to a level consistent with the requirements of our clients. IPS offers a complete project management service, including operation of Principal Contractor role as well as delivering turnkey projects. Experience gained in the water industry has enabled us to manage the competing demands of cost, quality and safety for all our projects.

    Networks - Water Supply
    Contractors
    Power Plastics Ltd logo

    Power Plastics Ltd

    United Kingdom

    Power Plastics Ltd, an ISO 9001 certified company, design, manufacture and install a range of flexible roofing systems for process tanks extensively used within the water and sewage industry. Their roofs are manufactured from tough high quality reinforced PVC materials supported on skeletal frames manufactured from aluminium, galvanised steel or stainless steel. The covers can be designed to be easily removed and refitted within minutes by one or two people without the need for specialist equipment giving unrestricted access to the tank process. This has great benefits in respect to monitoring and maintaining the tank process in addition to the added health safety benefits associated with a confined spaces issues. The roofs can be used for many purposes with materials being suitable for contact with drinking water and being resistant to corrosive materials. All their installations are carried out by highly skilled fittings teams which are overseen by project managers, who ensure that all health and safety issues have been considered in addition to providing thorough risk assessments and method statements prior to commencing any work on site. All designs are structurally proven by independent structural engineers and comply with the latest CDM regulations.

    Designers
    Grant Plant Hire Ltd logo

    Grant Plant Hire Ltd

    United Kingdom

    Grant Plant Hire Ltd (GPHL) is based near Penrith in the north of England close to the M6 and A66. GPHL has the highest of standards when it comes to the delivery of construction projects throughout Scotland and Northern England. The time-served expertise within our team gives us the ability to not only focus on the critical path but all the ancillary aspects of the job. We take pride in offering a partnered approach with our clients in order to achieve the best outcome with the minimum of delay. As well as traditional civil engineering works, GPHL specialisms include: Steel piled cofferdams In-river working Pipeline/trunk main installation Deep drainage Hydro electric schemes Tidal works Our latest projects Water mains: Currently we are engaged on Northumbrian Water’s County Durham and Tees Valley Pipeline, it is designed to improve water quality and increase resilience and operability within the Tees Network. The pipeline will replace existing portable water mains across the North East of England. GPHL are installing over 11 km of new steel welded main, completing works at the Whorley Strategic Connection including three number cast in situ underground tanks and tying in both the new inlet and twin outlet pipework to the existing reservoir. Hydro electric: GPHL have recently completed all the civil engineering works on a pioneering new type of hydro energy generation scheme at Whiteadder Reservoir, East Lothian for Scottish Water as part of its work to reduce carbon emissions. The hydro energy generation scheme is fed by a siphon and is believed to be the first of its type in Europe.  The scheme will enable Scottish Water to generate green energy while accurately controlling the level of the reservoir during seasonal fluctuations in weather. The siphon technology in the project allows Scottish Water to draw water up through the intake and over the top of the dam which then runs down through the siphon, through the hydro turbine, and back to the natural environment. Flood alleviation: GPHL are also currently subcontracted to Volker Stevin on the Flood Risk management Scheme in Appleby, for the Environment Agency. The project involves the installation of a new flood relief pumping station and installation of a new stretch of culvert diverting an existing culvert to the pumping station. A new rising main will outfall into the River Eden. The scheme is known as Appleby Town Centre Flood Risk Management Scheme (FRMS) and aims to reduce flooding caused by surcharging of the Doomgate Culvert which is designated as a main river and is a tributary of the River Eden.

    Reservoirs - Raw Water
    Contractors
    Alpha Plus Ltd logo

    Alpha Plus Ltd

    United Kingdom

    Founded in 1987 Alpha Plus Limited have been providing quality pipework, fabrication and installation of pipework, structures and mechanical plant for the utility, waste management, industrial / commercial and manufacturing sectors. Alpha Plus is committed to providing clients with innovative, cost effective, high quality solutions. We work closely with clients providing design, fabrication and installation to a high quality using approved standards and up to date technologies. We provide a wide range of services with a wealth of experience in the following areas: Pipework. Installation. Structural. Design and project management. Site Maintenance. Alpha Plus has successfully completed numerous contracts, varying in size from £10,000 to £3M+ , usually as lead mechanical installer of varying values in the following areas. Potable Water The installation of new and refurbishment of existing filters (RGF, DAF, GAC & RO), chemical dosing equipment and LP Block/Leopold flooring. Works include manufacture and installation of: Filter internals. Aeration and process pipework. Access steelwork. Launders. Weir plates. Installation of pumps, blowers and associated mechanical packages, trough plates, media and penstocks. Wastewater Installation of various designs of deep beds filters, submerged aeration filters, sequencing batch reactors, digesters, activated sludge plant, tertiary filters, centrifuges, screens, classifiers. Works include manufacture and installation of: Filter internals. Aeration and process pipework. Access steelwork. Launders. Weir plates. Installation of pumps, blowers and associated mechanical packages, trough plates, media and penstocks. Waste to Energy/Power Generation Installation of biogas CHP systems, waste incineration plants, electrostatic precipitator installations, gas scrubber installations, digester heating/circulation and internals. Works include manufacture and installation of: High pressure super heated/saturated and low pressure steam. Natural gas. Fuel oil. Compressed/instrument air. Chemical dosing pipework. Access and support structures. Pipe bridges. Large bore ducting up to 2000mm (mild steel and stainless). Ash transfer systems. GRP acid/alkaline pipework. Installation of pumps, driers, scrubber vessels, tanks and associated mechanical packages.

    Mapping & Modelling
    Accreditations
    AJ Engineering & Construction Services Ltd logo

    AJ Engineering & Construction Services Ltd

    United Kingdom

    AJ Engineering & Construction Services Ltd provide a wide spectrum of engineering services ranging from steel fabrication and CNC machining to cladding and civil engineering, with our highly experienced team we provide on-time, on-budget quality solutions. From our bases in Forres and Fort William, and a team accustomed to travel we can meet our client’s needs wherever required. Having worked on various water and wastewater treatment projects for the past 25 years we have developed a great working relationship with water companies across the UK. Our in-house capabilities allow us to offer a turnkey service to our clients from reactive maintenance and manufacturing to planned infrastructure and non-infrastructure projects. Many of the projects we undertake in the water sector are within water treatment and wastewater treatment plants where cleanliness is paramount, all our water sector site teams hold certification and Water Hygiene cards. Our range of services collated into one means that we can take on multiple discipline contracts and deliver them as one which provides our clients with a number of advantages. It removes the need to have multiple contractors on site at once. Benefits in cost savings passed down on procuring large amounts of steel for a side wide project. Little risk of dimensional discrepancies between contractors We work alongside framework delivery partners throughout the UK providing the services below; Steel portal frame buildings (design, fabrication, erection & cladding) Design, manufacture and installation of pipe bridges Design, manufacture and installation of site wide access metalwork (walkways, access stairs, ladders etc) Design, manufacture and installation of modular water buildings transportable by road. Design of various process tanks, pipework and pumps. Fabrication of tanks and pipework (stainless and carbon) Mechanical Installation Modular Treatment Buildings and Mechanical Fit-out SR2 rated steel enclosures (quicker than GRP Kiosks) We appreciate how important quality and cleanliness is in the water sector and we are proud that we have completely segregated facilities for stainless steel and carbon steel. In addition to this we are also approved under the regulations 31(4)(A) of the water supply regulations 2016 to supply stainless steel and pipework fabrications to the drinking water sector.

    Networks - Sewerage
    Asset Maintenance & Rehabilitation
    Water Engineering Services Ltd logo

    Water Engineering Services Ltd

    United Kingdom

    Water Engineering Services Ltd is tailored to provide a full turnkey solution to fulfil clients’ needs.   The team brings extensive knowledge of working within the wider water industry and other similar industries e.g. commercial, industrial, petrochemical and pharmaceutical. We recognise the benefits and challenges incorporating innovation into a project noting innovation can be new technology or working methodology. With our experiences working outside the Water Industry and with a wide range of Delivery Partners, WES Ltd look to bring innovation and best practices into all their projects to ensure the best project completion is achieved for all parties. WES Ltd considers Design for Manufacture and Assembly (DfMA) methodologies during the Design phase on all projects and having the Fabrication arm of the business allows for DfMA concepts to be realised, as well as providing bespoke solutions for end clients or other suppliers. Water Engineering Services consists of 3 in house areas of business: DESIGN: Our in-house design department specialises in mechanical & electrical designs but has very strong ties with Delivery Partners to also offer structural, civil, hydraulic and system integration. Our design team cover all aspects of a project from feasibility studies and optioneering to fabrication and construction drawings. ON-SITE INSTALLATION & COMMISSIONING: Our WES Ltd installation team, constructs, commissions, and optimises a project regardless of scale and complexity. This is achieved by utilising the experienced in-house mechanical & electrical team or managing a Delivery Partner or specialist contractor. Our Project Managers, Site Managers/ Supervisors, Design and CAD Engineers, Commissioning Engineers, Electrical and mechanical Site operatives all have up to date industry competency training and certification. All our electrical work will be fully tested CompEX and NICEIC certified. FABRICATION: With our 15,000 square foot workshop, offering stainless and mild steel fabrication to BSEN 1090 Execution class 2 and WRAS approval. ACCREDITATIONS WES Ltd is accredited with: ISO 9001 (Quality Management Systems) 14001 (Environmental Management Systems) 45001 (Occupational Health and Safety Management Systems) EN 1090 Ex Class 2 SafeContractor SafePQQ-PAS91 CHAS CHAS Advanced-PAS91 Achilles UVDB Silver + ISO 26000 (working towards) WES Ltd internal systems also conform to ISO 19650 (Information Management – BIM) and allow for integration into a client’s internal system e.g., ProjectWise.

    Networks - Water Supply
    Contractors
    Tank Consult Ltd logo

    Tank Consult Ltd

    United Kingdom

    Formed in South Yorkshire in 2013, Tank Consult's Managing Director has over 40 years expertise in the design, manufacture, and installation of glass coated, stainless steel tanks, along with the design and construction of reinforced concrete, in situ poured circular and square tanks and RC structures. “Choose Tank Consult, and you choose expertise to support and deliver for you, safely, on time and within budget to the highest quality standards.” Tank Consult: Delivering carbon/smart tank solutions for a stronger, greener future. We lead, others follow.

    Reservoirs - Treated Water
    Asset Maintenance & Rehabilitation
    JK Fabrications Ltd logo

    JK Fabrications Ltd

    United Kingdom

    With over 30 years of experience delivering expertise in the industry, JK Fabrications Ltd has become one of the front runners and will keep challenging ourselves and others to improve our Environment as we believe that; Our Environment, is our Future. At JK Fabrications, we are an engineering company that takes pride in our family roots, with an aim to continue to successfully grow our business. Our company values are incorporated into everything we carry out and we seek to work with like-minded companies. Established in 1998, JK Fabrications specialises in efficent, effective, and environmentally sensitive solutions to the Water Treatment, Waste Water, Waste to Energy, and Pharmaceuticals Industry. With over 30 years of experience delivering expertise in the industry, JK Fabrications has become one of the front runners and will keep challenging ourselves and others to improve our Environment as we believe that ‘Our Environment, is our Future’. With the ease of access to Northern Ireland’s principal motorway network and equal distance between both Belfast Airports and Dublin Airport, JK Fabrications’ 50,000 Sq/ft premises in Newry are the perfect location to produce and deliver your project. Design We have a fully equipped in-house design team with over 65 years of combined technical, manufacturing, and sector-specific experience, that are highly skilled and trained using the very latest design software. Manufacture We have built our reputation by producing specialised products for the waste-to-energy, wastewater, water treatment, and pharmaceutical industries. Our experienced welders and fabricators along with our state-of-the-art machinery make sure that each project is carried out to a high standard. Install We have an experienced installation team with a dedicated core team of engineers, mechanical fitters, and coded welders who have over 30 years of experience in the supply and installation of our fabricated products for a wide range of projects throughout the UK and Ireland. Commission Our experienced commissioning engineers will attend the site to oversee the installation of systems, plants, and equipment. They will commission, test, and optimise the equipment as well as provide the operators with operation and maintenance manuals. Products include: Stainless Steel Pipework | Stainless Steel Vessels (inc Pressure Vessels) | Mild Steel Pipework | Lamellas | Picket Fence Thickeners | Rectangular Bridge Scrapers | Half Bridge Scrapers | Conical Settlement Tanks

    Pipeline & Pipework Products
    Accreditations
    Aquability OPS Ltd logo

    Aquability OPS Ltd

    United Kingdom

    Aquability OPS Ltd was established in 2015 and is a leading technical consultancy providing optimised process solutions in the wastewater treatment industry. We are trusted partners of water companies, contractors and consultants and a member of British Water - the trade body representing the supply chain to government and the water companies. Director, Nicola Henderson is a chartered Chemical Engineer with over 27 years experience in the water industry and is one of the UK’s leading SBR experts. She is well known in the industry and previous tenures include Director of British Water and Chairman of British Water’s Technical Forum and Municipal Group. After graduating from Bath University in 1990 with a degree in Chemical & Bio Process Engineering, Nicola started her career in wastewater treatment at British Steel, responsible for the operation of their water and wastewater treatment systems. She then spent 24 years working in the design and build arena where she gained widespread experience in the water industry across a number of fields. Aquability OPS draw on Nicola’s extensive experience to offer technical expertise and bid support in both municipal and industrial wastewater treatment. We combine a mix of technical knowledge and practical application, providing comprehensive, tailored services across four areas to provide: Process expertise to solve our clients’ wastewater treatment challenges. Leading SBR expertise to ensure your SBR plant is a success. Commissioning and operational support for effective commissioning and trouble free operation. Bid support to develop innovative cost effective solutions, focused and persuasive bid writing and creative, engaging presentations. Our services help our customers to win work, build knowledge, reduce delivery and operating costs and avoid compliance issues. Our goal is to deliver successful outcomes for our Clients and develop trusting and long lasting relationships.

    Designers
    SILOTANK logo

    SILOTANK

    United Kingdom

    From industrial water tanks to turnkey odour control systems, we are the only UK manufacturers to offer 3 axis helical filament winding, providing high quality plastic storage tanks to the water and waste, microelectronics, chemical, pharmaceutical, paper & pulp, food processing, drinks and brewery industries. We are a leading manufacturer in the UK and Ireland for chemical, liquid and drinking water storage tanks, bunded storage tanks, process vessels, pressure vessels and environmental systems. Flexible in our approach to business and providing strong technical support, we are dedicated to supplying our customers the high quality product and service that you would expect from a market leader in specialist tanks. We manufacture to design standards BS4994:1987 , BS EN ISO 12573 & DVS2205 using FDA, WRAS and DWI approved materials. Our extensive ‘in house’ capabilities include mechanical engineering design along with chemical process design these activities are supported by a CAD network operating with AutoCAD 2D & Solid Works 3D software, FEA & Laminate Theory Analysis offering clients a complete service. We are innovative and continue to advance using the latest technology and materials used within the industry and have installed a CNC router and laser machine to support business development. RANGE OF EQUIPMENT & SERVICES OFFERED Storage, mixing and process tanks/vessels. Ranging in capacities from 50 litres to 200,000 litres. Tanks are manufactured using a variety of thermoplastics and GRP materials to suit the particular application including HDPE, polypropylene, UPVC/GRP (Aqua Pure – WRAS approved), polypropylene/GRP. The majority of our products are ‘bespoke’ designed and manufactured to suit the clients specific application. Odour and chemical fume scrubbing towers. Our ‘bespoke’ design and manufacture odour or chemical fume abatement equipment to suit most environmental applications. Our site teams are fully trained and able to complete on site installation within Ireland & UK including offloading, positioning, bolting down, assembly of any ancillary access steelwork as well as thermoplastic pipework and ductwork installations.

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    Stainless Steel Water Storage Tanks: Grade Selection, Fabrication, and Hygienic Standards

    Stainless steel tanks for water storage and process applications offer superior corrosion resistance, hygienic surface finish, and long service life compared to carbon steel or plastic alternatives. Common grades: Grade 304 (AISI 304, EN 1.4301, 18 percent Cr, 8 percent Ni, max 0.08 percent C): suitable for clean potable water storage, rainwater, and most process water; not recommended for chloride-rich water (greater than 200 mg/L Cl-) or coastal environments. Grade 316L (AISI 316L, EN 1.4404, 16 to 18 percent Cr, 10 to 14 percent Ni, 2 to 3 percent Mo, max 0.03 percent C): superior chloride resistance (Pitting Resistance Equivalent PRE = 26 to 28); suitable for seawater service, brine, saline water, chlorinated process water up to 500 to 1,000 mg/L Cl-; widely used for potable water storage, chemical dosing, pharmaceutical, and food/beverage applications. Duplex 2205 (EN 1.4462, 22 percent Cr, 5 percent Ni, 3 percent Mo, PRE greater than 35): highest chloride resistance; seawater desalination, offshore, high-salinity process water. Surface finish: BA (bright annealed), 2B (cold rolled), No. 4 (brushed), electropolished (EP, Ra less than 0.8 micron) - EP required for pharmaceutical/UPW tanks.

    Hygienic stainless steel tank design and fabrication for potable water: WRAS Approval required for all tanks in contact with potable water in the UK; materials must comply with BS 6920 (Suitability of non-metallic products for use in contact with water intended for human consumption) and the Drinking Water Inspectorate (DWI) Regulation 31 approval process. Tank fabrication: TIG (GTAW) welding with full penetration welds, weld bead polished to Ra less than 3.2 micron for exposed surfaces (Ra less than 0.8 micron for pharmaceutical); full pickling and passivation after fabrication (HNO3 30 percent solution or citric acid 10 percent, contact 30 to 60 minutes at 20 to 50 degrees C) to restore passive layer damaged by welding. BS EN ISO 17672 specifies filler metal selection; weld inspection per BS EN ISO 5817 (fusion welding quality levels). Hygienic design principles (EHEDG guidelines, 3-A Sanitary Standards): all interior surfaces accessible for cleaning; no dead legs greater than 2 times pipe diameter; crevice-free joints; sloped bottoms (minimum 1:100) for self-draining; vents with hygiene filters (HEPA or 0.2 micron membrane); sight glasses, level gauges per EHEDG Type EL.

    Stainless steel tank standards and sizing for water applications: BS EN 14015:2004 (Site built, vertical, cylindrical, flat-bottomed above ground welded metallic tanks for the storage of liquids at ambient temperature): for large site-built tanks (greater than 5 m diameter), covers material, welding, inspection, and testing. BS EN 13458 (Cryogenic vessels, static) and BS EN 14620 (Field erected vertical cylindrical flat-bottomed tanks for refrigerated liquefied gases at atmospheric pressure) for specialised water/wastewater storage. AWWA D100 (Welded Carbon Steel Tanks for Water Storage) and AWWA D103 (Factory-Coated Bolted Carbon Steel Tanks) - US standards commonly referenced. Thermal insulation: polyurethane foam (40 to 60 kg/m3, lambda 0.025 W/mK) applied externally with stainless steel cladding for hot or cold water storage; prevents Legionella growth in cold water (target less than 20 degrees C) and heat loss in hot water tanks (target greater than 60 degrees C). Sectional stainless steel tanks (GRP-lined or pure SS panels, Titan Eco, Balmoral): installed in restricted-access plant rooms without crane access; panels bolted together on site with butyl or EPDM joint seals; suitable for 1,000 to 5,000,000 litre installations.

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    Frequently Asked Questions

    What grade of stainless steel is used for water tanks?

    Grade selection for stainless steel water tanks: (1) Grade 304 (1.4301): suitable for potable cold water storage in temperate climates, rainwater, process water with chloride less than 200 mg/L; most economical stainless option; not suitable for coastal/marine environments or high-chloride water; (2) Grade 316L (1.4404): preferred for potable water where chlorides may be elevated (coastal supplies, desalinated water blends, softened water with residual NaCl); suitable for pharmaceutical, food grade, and chemical applications; higher Ni and Mo content provides pitting resistance; (3) Grade 2205 duplex (1.4462): highest corrosion resistance, for seawater, brine, very high chloride process water; higher cost, more difficult to weld; (4) Grade 321 (1.4541): titanium-stabilised 304, for high-temperature applications (greater than 400 degrees C); rarely needed for water tanks. UK WRAS approved installations: both 304 and 316L are acceptable for potable water; 316L specified by many water utilities as standard for potable storage due to greater margin against chloride pitting in recirculating hot water systems (Legionella risk at elevated Cl-). DWI Regulation 31 approval: tank manufacturer must hold WRAS/DWI approval for the specific tank range, not just the material grade.

    What capacity of stainless steel tank do I need?

    Water storage tank sizing depends on the application and demand pattern: (1) Potable water storage (buffer/break tank): minimum 1 hour peak demand at design flow rate for buildings; hospitals and critical facilities: 24 to 48 hours reserve storage; Approved Document G (Part G, Building Regulations 2010) does not prescribe tank volume but requires adequate cold water storage; BS EN 806-2 (Design for water installations) recommends 24-hour storage for cold water cisterns in commercial buildings; (2) Fire fighting: BS EN 12845 (fixed firefighting systems), BS 9990 (dry riser), or BS 9251 (sprinkler systems) specify tank volume based on hazard classification: OH3 sprinkler risk requires typically 100 to 200 m3 minimum, high hazard (HH) 300 to 1,000 m3; (3) Process water: size to buffer production rate vs supply rate, typically 30 minutes to 4 hours production demand; (4) Rainwater harvesting: calculated per BS 8515 (demand vs rainfall balance over annual cycle); (5) Cooling tower make-up: 24 to 48 hours evaporation loss storage. Physical sizing: volume = plan area times height; practical stainless tank heights 1.5 to 5 m; circular plan most efficient per unit volume; flanged cylindrical or rectangular sectional.

    How are stainless steel water tanks cleaned and disinfected?

    New tank commissioning (BS 8558:2015, Guide to the design, installation, testing and maintenance of services supplying water for domestic use): (1) Inspect interior surfaces for debris, weld spatter, or surface contamination; (2) Flush tank with clean water; (3) Fill with potable water containing minimum 50 mg/L free chlorine (as sodium hypochlorite solution); allow 1-hour contact time for new tanks or after maintenance; (4) Drain and flush with mains water until residual free chlorine is less than 0.5 mg/L (or less than 1 mg/L, depending on system); (5) Bacteriological sampling: 2 consecutive samples at least 24 hours apart, no detectable E. coli or total coliforms (BS EN ISO 9308-1); (6) Commission supply. Routine maintenance (BS 8558, Legionella COSHH ACoP L8): tank inspection annually for cold water (HSE L8 Legionella guidance); thorough inspection and cleaning every 2 to 3 years: drain, clean walls and base with food-grade detergent, inspect for corrosion, pitting, weld defects, biofilm; disinfect per BS 8558 before refilling. Stainless steel passivation maintenance: if pitting or tea staining observed, re-passivate with 10 percent citric acid solution. Hot water primary storage (calorifiers, buffer vessels): maintained at greater than 60 degrees C per L8 Legionella guidance; monthly sentinel outlet temperature checks; annual drain and inspection.

    What is the lead time for a custom stainless steel tank?

    Lead times for stainless steel tanks vary significantly by type and size: Sectional stainless steel tanks (factory-manufactured panels, site-assembled): typically 6 to 12 weeks from order to site delivery; panels are standard dimensions (600 mm x 600 mm standard, 1200 x 600, 1200 x 1200), allowing rapid production of standard configurations; bespoke configurations (non-standard dimensions, complex baffling, access arrangements) add 2 to 4 weeks. Cylindrical tank (factory fabricated, complete): 4 to 10 weeks for standard sizes up to 10,000 L; 10 to 20 weeks for large custom tanks 10,000 to 100,000 L. Site-built rectangular or cylindrical tanks (greater than 50,000 L): site fabrication typically 4 to 12 weeks on site after material lead time of 6 to 10 weeks for specialist 316L or duplex plate - overall 14 to 22 weeks from order. Expediting options: ex-stock tanks (standard sizes) available for immediate delivery from distributors; GRP-lined carbon steel sectional tanks as interim solution while SS fabricated. For WRAS/DWI-approved tanks, confirm that the specific manufacturer's tank range (not just material) holds current approval; approval renewal is annually or biennially with some certification bodies.

    Case Study·Potable water storage and distribution infrastructure
    Challenge

    A regional water company in the East of England needed to replace 14 ageing bolted steel cold water storage tanks at a strategic pumping station, most dating from 1974. Corroded panels were creating iron particle contamination in downstream supply zones, triggering customer discolouration complaints. One tank had developed a pinhole leak in a weld seam causing a GBP 28,000 emergency repair callout.

    Approach

    The engineer specified sectional Grade 316L stainless steel tanks (Balmoral Tanks Aquastore SS range, WRAS-approved) in a 2+1 configuration (two duty tanks plus one standby), each 120,000 L, replacing the four ageing bolted steel tanks of combined 400,000 L capacity. Tanks were designed with sloped bases (1:100 to drain), hinged inspection covers, HEPA vent filters, and floating off-take assemblies. Disinfection followed BS 8558 commissioning protocol (50 mg/L free chlorine, 1-hour contact time, two clean bacteriological samples before service entry).

    Outcome

    Iron particle discolouration complaints fell to zero in the three downstream DMA zones within 6 weeks of the new tanks entering service. The PSSR 2000 written scheme of examination was updated to reflect 316L stainless material (5-year internal inspection interval versus 2-year interval for the previous carbon steel tanks). The 60-year design life of the stainless tanks was confirmed by the competent person, reducing whole-life asset management cost by GBP 1.2 million versus continued maintenance of the original bolted steel tanks.

    Questions to Ask Shortlisted Providers

    1. 1

      What is the water quality in terms of chloride concentration, pH, dissolved oxygen, and residual chlorine, and what stainless grade (304 vs 316L) is appropriate?

      Chloride above 200 mg/L increases pitting risk on Grade 304; potable water supplies blended with softened water or desalinated water may have elevated chloride requiring 316L or duplex; incorrect grade selection causes pitting failure within 10 to 20 years.

    2. 2

      What is the required tank capacity and configuration (single, duty/standby, compartmented) for the supply zone security of supply commitment?

      Water company operational security typically requires 24 to 48 hours storage reserve; tank sizing must account for demand peaks, firefighting reserve, and maintenance isolation without supply interruption.

    3. 3

      Does the installation require a WRAS-approved product and does the specific manufacturer's tank range hold current WRAS certification?

      WRAS approval is required for all potable water contact materials under WS(WQ)R 2016; approval is range-specific, not just material-specific; an unapproved tank from an approved-material manufacturer still requires DWI consent.

    4. 4

      What is the expected maintenance access regime and what inspection intervals will the PSSR 2000 competent person specify?

      316L stainless tanks typically achieve 5-year internal inspection intervals (versus 2 years for carbon steel); this needs to be agreed with the competent person before procurement to confirm the compliance cost assumption in whole-life modelling.

    5. 5

      Is there a Legionella risk assessment for the tank and its associated hot or cold water systems, and what temperature control is specified?

      Cold water storage tanks must maintain water below 20 degrees C per ACOP L8; tanks in warm plant rooms or exposed to solar gain may require insulation or recirculation to prevent temperature rise and Legionella risk.

    What Drives Cost in This Category

    Tank volume, material grade, and panel configuration

    Sectional 316L stainless tanks cost GBP 600 to 1,200 per m3 of capacity for mid-range volumes (50,000 to 500,000 L); 304 stainless is 15 to 25% cheaper but unsuitable for elevated-chloride supply zones.

    Site preparation, access, and installation complexity

    Below-deck tank replacement in existing buildings adds 30 to 60% to installation cost due to confined access; crane-lifted cylindrical tanks on open sites are 20 to 40% cheaper to install than sectional tanks assembled in confined spaces.

    WRAS approval and commissioning requirements

    Commissioning per BS 8558 (disinfection, bacteriological sampling, regulatory notification to DWI) costs GBP 2,000 to 8,000 per installation; DWI notification of tank replacement is required under WS(WQ)R 2016 Regulation 28.

    Ongoing PSSR 2000 inspection and maintenance costs

    Competent person inspection for tanks under PSSR 2000 costs GBP 500 to 2,500 per vessel per examination; 316L stainless tanks typically require inspection every 5 years vs 2 years for carbon steel, reducing 25-year inspection cost by GBP 4,000 to 12,000 per tank.

    Key Regulations & Standards

    Water Supply (Water Quality) Regulations 2016 and DWI Regulation 28

    All materials in contact with potable water must be WRAS-approved or individually tested per BS 6920; tank replacement at strategic storage sites requires notification to DWI under Regulation 28; DWI may specify additional sampling requirements post-commissioning.

    BS 8558:2015 Guide to Design, Installation, Testing and Maintenance of Services Supplying Water for Domestic Use

    Specifies commissioning, disinfection, bacteriological testing, and maintenance requirements for cold water storage installations; commissioning must achieve two consecutive clean bacteriological samples before the tank enters supply.

    PSSR 2000 and Written Scheme of Examination for Pressure Vessels

    Cold water storage tanks operating above atmospheric pressure (e.g. with pressurised inlets) may fall under PSSR 2000; the written scheme must define inspection intervals, safe fill levels, and examination scope; maintained by the site competent person.

    HSE ACOP L8 Legionella Control and Cold Water Storage Tanks

    Cold water stored in tanks must be maintained below 20 degrees C and above 2 degrees C to prevent Legionella growth; tank insulation, shading, and regular inspection and cleaning are required; risk assessment must document control measures and monitoring records.

    Explore Related Categories

    Related Tank Materials

    GRP / FRP Tank CompaniesHDPE Tank CompaniesConcrete Tank CompaniesTank Fabrication Companies

    Hygienic Applications

    Food & Beverage Water Treatment CompaniesPharmaceutical Water Treatment Companies

    Related Equipment

    Pressure Vessel CompaniesSkid Fabrication Companies

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