Specification of Stainless Steel Pipe Fittings and Flanges
Standard Description
ASTM A 182 / A 182 M Forged or rolled alloy steel pipe flanges, forged fittings and valves and parts for high.
ASTM A 403 / A 403 M Wrought austenitic stainless steel piping fittings.
ASTM A 530 / A 530 M General requirements for specialized carbon and alloy steel pipe.
ASTM A 815 / A 815 M Wrought ferritic, ferritic, austenitic and martensitic stainless steel piping fittings.
ASTM A 312 / A 312 M Seamless and welded austenitic stainless steel pipe.
AS 2129 Flanges for pipes, valves and fittings.
ANSI / ASME B1.20.1 Pipe threads, general purpose (inch).
ANSI B 16.3 Malleable iron threaded fittings.
ANSI B 16.5 Steel pipe flanges and flanged fittings.
ANSI B 16.9 Factory made wrought steel butt welding fittings.
ANSI B 16.11 Forged steel fittings socket welding and threaded.
ANSI B 16.25 Butt welding ends.
ANSI B 16.28 Wrought steel butt welding short radius elbows and returns.
MSS SP 43 Wrought stainless steel butt welding fittings.
BS 21 Threading
ISO 4144 Stainless steel fittings threaded to ISO 7-1.

Specification of Stainless Steel Tube and Fittings
Standard Description
ASTM Seamless ferritic and austenitic alloy steel boiler, super heater and heat.
ASTM A 269 Seamless and welded austenitic stainless steel tubing for general purpose.
ASTM A 270 Seamless and welded austenitic stainless steel sanitary tubing.
ASTM General requirements for carbon, ferritic alloy and austenitic alloy steel.
ASTM A 554 Welded stainless steel mechanical tubing.
ASTM Welded unannealed ferritic stainless steel tubing.
ASTM Seamless and welded ferritic / austenitic stainless steel tubing for general.
AS 1163 Structural steel hollow sections. (Dimensional Tolerances)
BS 1864 British standard milk fittings.
AS 1528, Parts 1 Tubes (Stainless Steel) and tube fittings for the food industry.
   
Higher Description
ASTM B 674 UNS N08904 welded tube.
STM B 677 UNS N08904 seamless pipe and tube.