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Category: Water & Water Treatment

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  1. Applications for Stainless Steel in the Water Industry..

    This publication can be downloaded from here . It outlines the grades, design and fabrication principles for the optimum use of stainless steel in the water industry.

  2. Bright Future for Stainless Steel Plumbing

    This article first appeared in the APHC (Association of Plumbing and Heating Contractors) Bulletin No 556 May/June 2003. It summarizes the research published by BSSA on the application of stainless steel in plumbing. The benefits of corrosion and corrosion-erosion resistance and strength and ductility are compared to those of copper and plastics. Joining methods, including press fitting are outlined. Long term cost benefits are compared with copper and plastics. Applications at the Royal Opera House, Ightham Mote (kent) and in various Scottish Hospitals are discussed.

  3. BSSA Advice Note 3 for Drinking Water January 2002

    A summary of the regulations affecting stainless steels used in the treatment and supply of drinking water is shown. The Water Industry Acts of 1989 and 1991, Regulation 25 is discussed. The approval of stainless steels for use under regulation 25 involves leachate determinations based on BS7766 to the DWI Operational Guidelines and Code of Practice for Stainless Steel Products in Drinking Water Supply. The approval process for stainless steel products is briefly summarized.

  4. Conditions of Approval of Stainless Steel For Products in Contact with Drinking Water in Public Supply

    This paper was presented at the seminar ?Materials in Contact with Drinking Water?, organized for the Water Treatment & Environmental Management Industry in Leeds in June 2002. A review of the approval of stainless steels to the DWI Regulation 25 and the eventual publication of the DWI Operational Guidelines and Code of Practice for Stainless Steel Products in Drinking Water Supply is discussed. The importance of material selection, design, fabrication and maintenance and inspection for the successful application of stainless steels in drinking water applications is outlined, before a more in depth discussion of the approval process for stainless steel is covered.

  5. Operational Guidelines and Code of Practice for Stainless Steel Products in Drinking Water Supply

    This paper contains the full text of the Drinking Water Inspectorate (DWI) application 56.4.477, published by the Steel Construction Institute in 2002. There are two distinct parts, the Code of Practice and the Operational Guidelines. A comprehensive range of issues is covered, including material selection and approval, design, welding, fabrication, post fabrication cleaning, installation, maintenance and inspection (construction, commissioning and operation).

  6. Post weld cleaning and finishing of stainless steels

    Should heat tint discolouration in the heat-affected zone of stainless steel welds be removed? In cases where the application involves an 'aqueous' corrosion hazard, the local reduction in sub-surface chromium can affect the corrosion resistance of the steel. The removal of weld heat tint from stainless steel fabrications using acid pickling or electrolytic methods not only improves the overall appearance but is vitally important for restoring the full corrosion resistance of the finished product. As a general rule, if you can see a discolouration on the surface due heat tint, this should be removed as part of good post weld cleaning practice for any stainless steel welded joints. (37)

  7. Selection of stainless steels for handling chlorine (Cl2) and chlorine dioxide (ClO2)

    Dry chlorine gas should not attack stainless steels. Damp gas or chlorine dissolved in water can be a corrosion hazard. Corrosion can take the form of localised crevice and pitting corrosion. Stress corrosion cracking (SCC) can be an additional hazard in damp chlorine gas, if the temperature is high enough.

  8. Selection of stainless steels for water tank applications

    Stainless steel grades, such as the 304 or 316 types are generally suitable for storing and handling cold or unheated drinking (town's) waters. Hot water tanks however may be at risk from stress corrosion cracking (SCC) Austenitic types such as 304 or 316 can be useful and are used, but in extreme cases the more 'SCC' resistant duplex stainless steels should be considered.

  9. Selection of stainless steels in water supply and waste water treatment

    The benefits of stainless steels are given together with guidelines for selection in different chloride levels, good design and fabrication practices, which together will promote optimum corrosion performance.

  10. Stainless Steel in Reprocessing and Effluent Treatment Plant

    Paper originally delivered at the BSSA Conference 'Stainless Solutions for a Sustainable Future' held in Rotherham on 3rd April 2003. The main theme of this paper is the Deep Tunnel Sewer System and Changi Water Reprocessing Plant, currently under construction in Singapore. Stainless steels are used extensively throughout the plant that will provide a long-term sustainable future for the citizens of Singapore throughout this century. The role of stainless steels in Nuclear Reprocessing Plant, Desalination Plant and other water treatment projects is also touched briefly.

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