... for structure, fluid, conduit, sprinkler system,fence tubing galvanized pipe, including ERW and Seamless, round and rectangular or square ... 5L, API5CT, UL6, UL797, EN10219, EN10255, EN10240, EN39(BS1139), DIN2440/DIN2444, JIS G3444, BS1387, DIN2394, DIN2395, or ... PURPOSE: fence tube, structural tube, scaffolding tube, water transferring tube, oil pipe, casing pipe, sprinkler fire fighting system tube ( ...