ASTM Standards for Stainless Steel Pipes & Tubes

Seamless ferritic and austenitic alloy-steel tubes for boilers, superheaters and heat exchangers, ordered to minimum wall in austenitic grades including TP304, TP316, TP321 and TP347.

Seamless, welded and heavily cold worked austenitic stainless steel pipe for corrosive and high-temperature service, covering the grade range from TP304 through TP347H and N08904.

Welded austenitic steel boiler, superheater, heat-exchanger and condenser tubes, produced from strip without filler metal and supplied solution annealed, with weld bead worked where specified.

Seamless and welded ferritic/austenitic stainless steel pipe, the duplex counterpart to A312, specified where chloride stress corrosion cracking rules out the standard austenitic grades.

Seamless nickel and nickel-cobalt alloy pipe and tube, covering Hastelloy C276 (UNS N10276) and related alloys for oxidising and reducing acid service.

Welded nickel and nickel-cobalt alloy tube, autogenously welded from strip and solution annealed after welding, the welded counterpart to B622 in the same alloy range.

Welded nickel and nickel-cobalt alloy pipe, produced from plate or strip with filler metal permitted, then solution annealed; C276 pipe for aggressive chemical process duty.

Welded stainless steel mechanical tubing for structural, ornamental and mechanical applications, where appearance or corrosion resistance governs. Round, square and rectangular sections are covered.

Seamless and welded austenitic and ferritic/austenitic stainless steel sanitary tubing, with controlled internal and external surface finishes for dairy, food processing and pharmaceutical process lines.

Ferritic/austenitic duplex stainless steel pipe, electric fusion welded with the addition of filler metal, used for larger diameters and heavier walls outside the A790 range.

Seamless and welded austenitic stainless steel feedwater heater tubes, supplied straight or bent into U-tubes for tubular feedwater heaters.