Schedule 40 steel pipe share Product name: schedule 40 pipe，grade b steel pipe, black pipe, black steel tubing, schedule 40 black steel pipe Materials: GR.B, X42, X56, P11, P22, ST37, ST44, ST52, S235JR, S355JR, STP430. Standard:API 5L, ASTM A106, A53, A335, ANSI B36.10 Specification: Outer diameter: 1/4”- 40” (13.7mm-1016mm). Wall thickness: 1.5mm-80mm, Schedule 40, Schedule 80, .Schedule 20 Length: 2m- 12m. https://www.slpipeline.com/Schedule-40-steel-pipe.html