... for structure, fluid, conduit, sprinkler system,fence tubing galvanized pipe, including ERW and Seamless, round and rectangular or square, aew according to standards ASTM ... pipe, casing pipe, sprinkler fire fighting system tube (with groove available), EMT conduit, furniture tube and so onCERTIFICATE: ISO9001, UL, FM, CE,JIS,API galvanized pipe ...