Standard Api 5l, api 5ct, apt 5b, en1047, sy/t5037-2000, gb/t3091-2008, gb 150, gb 151, gb 699, gb/t14976, gb/t8163, gb 13296 Material Q235, q345b, 16mn, 10#, 20#, 20g, 1cr18ni9, 09crmoai, 07cr2aimo etc. Or as per customers' requirements. Usage Petroleum/natural gas /chemical use/construction use/power Size 6''-72'' Wall thickness 5mm-15mm Packing Wooden cases with standard export packing. Other types of packing can be made according to the customers' requirements. Trade terms L/c or t/t Delivery time 10-100days, depending on qty. Size :od:219-3120mm Wt :5-15 Certificate :iso .Api .