... as per customer's requestProcess methodspiral weldedStandardsAPI 5L, API 5CT, ASTM, ANSI, ISO9001, DIN, ENApplication rangeUsed For Gas, Petroleum, Water , ... Steel Trade CO.LTD. is a professional and reputed manufacture, for carbon steel welded pipes and galvanized steel pipes, angle steel and other sorts of steel ... are real manufacturer ,Welcome to our factory at any time ASTM A53 seamless steel pipe