... pipe standards ASTM, API, DIN, EN, BS, JIS, UL for structure, fluid, conduit, sprinkler system,fence tubing galvanized pipe, including ERW and Seamless ... , round and rectangular or square, aew according to standards ASTM A53, ASTM A106, ASTM A795, ASTM A135, ASTM ... scaffolding tube, water transferring tube, oil pipe, casing pipe, sprinkler fire fighting system tube (with ...