Steel Pipe & TubeChina Gas and Oil Steel Pipe Schedule 40 20, API 5L Gr. B X42 X52 Steel Pipe Schedule 80 168.3mm 114.3mm 88.9mm, Find details about China Steel Pipe Schedule 40, Steel Pipe Schedule 20 from Gas and Oil Steel Pipe Schedule 40 20, API 5L Gr. B X42 X52 Steel Pipe Schedule 80 168.3mm 114.3mm 88.9mm