... pipe standards ASTM, API, DIN, EN, BS, JIS, UL for structure, fluid, conduit, sprinkler system,fence tubing galvanized pipe, including ERW ... A53, ASTM A106, ASTM A795, ASTM A135, ASTM A500, API 5L, API5CT, UL6, UL797, EN10219, EN10255, EN10240, EN39(BS1139 ... structural tube, scaffolding tube, water transferring tube, oil pipe, casing pipe, sprinkler fire fighting system tube (with groove available), ...