... :Tigersteel Certificate:ISO,API gb3091-2008, grade q235-b hot-galvanized steel pipes used on shed shed pipe ... 5mm, 6-12m long 3 steel grade:q235-b,q195-b,st33.2 4 prompt delivery shed pipe1 hot ... customers3 steel grade:q235-b,q195-b,st33.24 prompt delivery, for an order less than 1000 tons, we can ... deliver the goods in 20days gb3091-2008, grade q235-b hot-galvanized ...