Standards & Approvals

Relevant Standards and Approvals include:

AWWA Standards

C219   Bolt, Sleeve Type Coupling for Plain End Pipe
C220 Stainless Steel Pipe, 4-inch and Larger Diameter
C223 Fabricated Steel and Stainless Steel Tapping Sleeves
C226 Stainless Steel Fittings
C606 Grooved and Shouldered Joints
C228 Stainless Steel Flanges
D1XX Bolted Stainless Steel Tanks (under development)
C2FW Field Welding Stainless Steel (under development)
C2RC Stainless Steel Repair Clamps (under development)

ANSI/NSF

61 Drinking Water System Components - Health Effects
Austenitic and Duplex Stainless Steel approval to Appendix C

ASTM Specifications

A269 Seamless and Welded Austenitic Stainless Steel Tubing for General Service
A312 Seamless and Welded Austenitic Stainless Steel Pipe 
A380 Standard Practice for Cleaning, Descaling and Passivation of Stainless Steel Parts, Equipment and Systems
A403 Wrought Austenitic Stainless Steel Piping Fittings
A774 As-Welded Austenitic Stainless Steel Fittings for General Service
A778 Welded, Unannealed Austenitic Stainless Steel Tubular Products
A789 Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe 
A813 Single and Double Welded Austenitic Stainless Steel Pipe
A815 Wrought Ferritic, Ferritic/Austenitic and Martensitic Stainless Steel Pipe Fittings
A967 Standard Specification for Chemical Passivation Treatments of Stainless Steel Parts
A999 General requirements for Alloy and Stainless Steel Pipe

Tested and approved grades of stainless steel are also listed in UK Drinking Water Inspectorate Regulation 25 for product approval when used in accordance with the Operational Guidelines and Code of Practice.

For further approvals see Plumbing section.