Welded stainless steel round pipes and tubes 1.OD:12.7~2200mm 2.WT:0.5mm~30mm 3.Material:201,304,316L, ... stainless steel pipe Application: heat exchanger, boiler, condenser, pressure vessel 1) Standard: ASTM A249, ASTM A312 / DIN174572) Outside diameter: 12. ... Surface: bright anneal6) Test: eddy current / hydrostatic7) Packing: each in a plastic bag,then bundle with knitted plastic bag / wooden box