1. GB/T13793-1992,GB3091-2001 2. O/D*WT: 20-219* ... *20'DV) 5. Pipe manufacturer Key Words: Line pipe, gas pipe, oil pipe, water pipe and tube, plain end steel pipe, heating system pipe, floor heating pipe01) Material ... . 05 ) Application: Used for low pressure liquids conveyance, such as water, gas, and construction, and support, structural use 06) MOQ: 25MT ...