International standard: ISO 9001: 2000  Place of origin: Tianjin, China  Technique: Welded  Standard: BS 1387/BS 4568, ASTM 106, ASTM A 53, , EN 10255, EN 10219, GB/T 9711.1, GB/T 3091-2001,  HS code: 73063000  Usage: For low pressure liquid delivery such as water & construction & transportation  Out Diameter (O. D):  21.3mm 114.3mm (1/2 inch 4 inch)  Wall Thickness (W. T): 0.8mm to 13 mm  Length: 3m to 12 m usually, or as client's requirement  Zinc coated: Above 270g/ m2 or as clients' requirement  Payment Terms: T/T, 30% payment in advance, and the rest payment against before shipment  Delivery time: 15 to 30 days after received 30% payment in advance  Packing: Packing will be according to international standard in bundles strapped by strips then in to containers to avoid any damage or loss or as clients' requirement  Processing technology: Threading, coupling, necking punching and so on.