ASTM A312 TP316/ TP316L Pipes

astm a312 / a312m, standard specification for seamless, welded, and heavily cold worked austenitic stainless steel pipes, covering austenitic stainless steels, and manufactured both welded and seamless type for option.

asme sa312 is astm a312 equivalent specification.

astm a312 seamless pipe

pipe should be made from stainless steel billet in hot rolling or cold drawn, no any welding process during manufacturing, seamless pipe has better pressure to withstand, annealing solution and pickling finishing condition, applied for high temperature and corrosion environment.

astm a312 welded pipe

no additional metal using automatic welding process for welded pipe, made from stainless steel strip or plate, both single welding and double welding for option, small diameter and large diameter are available, annealing pickling finish.

seamless pipes made of astm a312 tp316/ tp316l shall be made by a process that does not involve welding at any stage of production; welded pipes shall be manufactured using an automatic welding process with no addition of filler metal during the welding process. the tp316/ tp316l pipe shall be heat treated by solution treatment, in which the pipe shall be heated and held for long enough period at a temperature no less than 1900°f [1040°c] so that all chromium carbides can be fully austenitized/ dissolved. subsequent water cooling or rapid cooling by other means shall be conducted to ensure no precipitation of carbides at grain boundaries. moreover, tp316l is less likely to precipitate chromium carbides compared to tp316 since their carbon content is low enough to reduce precipitation of intergranular carbides. this may result in limited sensitization hence benefit welding, flame cutting, and other hot-working operations.

chemical composition requirements

*based on product analysis.

mechanical properties

*l: longitudinal elongation; *t: transverse elongation.

sizes, dimensions & tolerances

*t: nominal wall thickness; d: ordered outside diameter.