... liquid transfering, conduit, sprinkler system.fence steel tube, including ERW and Seamless, round and rectangular or square, aew ... thickness: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: ISO9001, UL852 ...