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DD ENV 1090 Part 6 is the new fabrication and erection specification for stainless steel. It covers austenitic and duplex stainless steels used in buildings and other similar steel structures.
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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.
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Web Based Resource at www.steel-stainless.org/architects
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This article describes the contents of the Architects’ Guide to Stainless Steel, an online resource containing an extensive amount of architectural information concerning stainless steel. The topics covered include grade selection, product forms, durability, economics, production and fabrication, surface finish, joining, maintenance and cleaning. The computer aided learning package Stainless SteelCAL is also described.
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Austenitic stainless steels have excellent resistance to corrosion by acetic acid emitted by wood. They are NHBC recommended for a range of fasteners and fixings in timber. For use in immersed timber, the choice of grade depends on the specific water conditions, including chloride level and flow rate. Careful grade selection is also required for fixings in timber in swimming pool buildings.
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The causes of metal corrosion in wood are described and the hazard that acetic acid can be to metals when liberated from hardwoods such as oak, western red cedar and Douglas fir. Stainless steel types 1.4301, (304), and 1.4401, (316), can normally be considered for timber fixings, but timber immersed in river or seawater may require 316 or superaustenitic grades such as 1.4547, (254SMO), for fasteners. Swimming pool building roof areas are also a special case. Stress corrosion cracking (SCC) resistant grades such as 1.4539, (904L), or 1.4547, (Avesta 254SMO), must be considered for load bearing or stressed fasteners.
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Bimetallic corrosion can only occur when two dissimilar metals are in ‘electrical’ contact and are bridged by an electrically conductive liquid. The risk of corrosion and staining when stainless steels are in contact with either galvanised steel or aluminium are described. (143)
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This article first appeared in the APHC (Association of Plumbing and Heating Contractors) Bulletin No 556 May/June 2003. It summarises 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.
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Stainless steel bars – Reinforcement of concrete – Requirements and test methods
This European Standard specifies the requirements and test methods for solid stainless steel bars used for the reinforcement of concrete. It is applicable to ribbed stainless steel bars in grade 500. Several significant changes have been made to the earlier standard version i.e. BS6744:2001 + A2:2009, ‘Stainless steel bars for the reinforcement of and use in concrete – Requirements and test methods’
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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 summarised.
