USE: A213 : Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater,and Heat-exchanger tubes A269 : Seamless and Welded Austenitic Stainless Steel Tubing for General Service A312 : Seamless,Welded and Heavily Cold Worked Austenitic Stainless Steel Pipes Weight Count:(Just for 316) Weight(Kg/M)=(D-S)S0.02506 D:Outside Diameter S:Wall-Thickness 316 Stainless Steel Pipe Chemical Requirements C max Mn max P max S max Si Cr Ni Mo N 316 0.08 2.00 0.045 0.030 1.00 16.0-18.0 10.0-14.0 2.0-3.0 ... 316L 0.035 2.00 0.045 0.030 1.00 16.0-18.0 10.0-14.0 2.0-3.0 ... 316H 0.04-0.10 2.00 0.045 0.030 1.00 16.0-18.0 11.0-14.0 2.0-3.0 ... 316N 0.08 2.00 0.045 0.030
