... *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:8 ... B/L. 09) Formula for calculating the H.D.G. pipe weight: WT/Piece=(O/D—Wall Thk)*Wall Thk*0 ... .02466*1.06*Pipe Length Oil, Gas and Water Conveyance Pipe and Tube