... ASTM, DIN, EN, BS, JIS, used in structure scaffolding system, frameISO9001, CE certificatescaffolding pipe, including ERW and Seamless ... 5L, API5CT, UL6, UL797, EN10219, EN10255, EN10240, EN39(BS1139), DIN2440/DIN2444, JIS G3444, BS1387, DIN2394, DIN2395, or similar ... :0.8mm---20mm. PURPOSE: fence tube, structural tube, scaffolding tube, water transferring tube, oil pipe, casing pipe, sprinkler ...