... / 4140/ 4145 OD:16-1016mm WT:3-120MM Large diameter Alloy Steel Pipe 1. Technique- hot rolled and cold drawn2. Application- Gas pipe3 ... Size ODWTSize 16-1500mm 3-60mmtolerance Section shapeRoundApplicationStructure pipe,Oil pipe, gas pipe, boiler pipe, pressure pipe, fluid pipeColorblackTechniqueCold rolled ,Hot dipped, cold drawn/dipped ...