... .good mechanical property schedule 20 steel pipe1)Suitable for conveyance of gas, petroleum, liquid, and electricity; 2)We have engineering team ... finish: black, blank, bright and galvanized C: Length of each pipe: 500mm-16,000mm D: Steel grade: st35,st35.8,st37,st37 ... from China to Japan, Korea,Southeast Asian Nations and part of American and European countries have started to select our products ...