... Certification:ISO9001:20001)Product Name:ASTM A53 Hot-dip Galvanized steel pipe2)Place of Origin:Nantong China(Mainland)3)OD ... and water supply projects; building, central air-conditioning pipe, fence, threading pipe, rolling doors, metal frame, support tube, furniture ... , sports equipment, fence, etc.13)Export: Europe, North America, the Middle East, ...