A774 is considered to be the most applicable specification for "as welded" fittings. As-Welded fittings are usually used where corrosion resistance is essential.ĪSTM A774 Fittings This specification covers welded unannealed stainless fittings intended for low to moderate temperatures and corrosion service where heat treatment is not required for corrosion resistance.
Fittings are pickled and passivated as per ASTM A380 to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation. Normally furnished in square cut ends, fittings with beveled ends can be provided. Special fittings can be supplied to customer design and size when required. As-Welded fittings can be supplied to ANSI B16.9 or MSS SP-43 dimensions, or customer specific dimensions. Welded elbows can be supplied as smooth flow or mitered construction, tees, lateral and crosses are supplied as nozzle-welded. from any of the wide range of weld able corrosion resistant alloys. Fittings can be supplied in a wide range of diameters and wall thicknesses. 018" under nominal.Īs-Welded "Fittings" and/or "A240" As-Welded fittings are welded using ASME qualified welding procedures using automatic or semi-automatic State of the Art Plasma Welding torches in a single setup.
Automatic welding process with or without addition of filler wire.010" under nominal.ĪSTM A409 (ASME SA409) This specification covers straight-seam welded, light wall, austenitic chromium-nickel alloy steel pipe for corrosion or high-temperature service. A product analysis of both the weld metal and base metal after annealing.Automatic welding process with the addition of filler wire.The principal manufacturing procedures specified under A358 are: Although no restrictions are made on sizes commercial practice is usually above NPS8. Tension, Reverse, forward-bend and hardness tests of each lot.ĪSTM A358 (ASME SA358) This specification covers electric-fusion-welded austenitic chromium-nickel alloy steel pipe suitable for corrosion or high-temperature service or both.The principal manufacturing procedures specified under A312 are: (Specially items can be ordered) A312 pipe with immediately deliver available from a complete inventory standard sizes up to 24". The A312 manufacturing process is suited to high-volume production and is generally limited to the diameters and schedule wall thickness shown in ANSI B36.10 and ANSI B36.19. Tension, Flattening, Flange test, reverse-bend and hardness tests required each lot.ĪSTM A312 (ASME SA312) This specification covers seamless and straight-seam welded stainless pipe intended for high temperature and general corrosion service.Hydrostatic or non-destructive electric test of each tube.Automatic welding process with no addition of filler wire.The principal manufacturing procedures specified under A269 are: All material is furnished in the heat treated condition and bead rolling is excluded in our process. Pipe is pickled and passivated as per ASTM A380 to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation.ĪSTM A269 This specification covers seamless and welded austenitic stainless steel tubing intended for the low or high temperature and general corrosion service.
Spot radiography or 100% radiography can be provided on all weld seams. Normally furnished in square cut ends, pipe with beveled ends can be provided. A778 is considered to be the most applicable specification for "as welded" pipe and differs from it only that a transverse guided bend test and a transverse tension test are required per lot.Ī778 pipe and tubing is commonly used in the Pulp and Paper mills, food processing plants, and other industries where corrosion resistance is essential.