... ASTM, DIN, EN, BS, JIS, used in structure scaffolding system, frameISO9001, CE certificatescaffolding pipe, including ERW and Seamless ... :0.8mm---20mm. PURPOSE: fence tube, structural tube, scaffolding tube, water transferring tube, oil pipe, casing pipe, sprinkler ... fire fighting system tube (with groove available), EMT conduit, furniture tube and so onCERTIFICATE ...