... City,Hebei Province,China,which is the base of steel pipe ,our company occupies an area of 80,000 ... specialized manufacturer of steel pipe: such as ASTM A106B,ASTM A53B seamless steel pipe ,API seamless pipe,API spiral pipe ,JIS G3454 STPG370 ... /410,JIS G3444 STK400,JIS G3452 SGP seamless steel pipe,hot galvanized..steel..pipe,stainlesssteel..pipe,etc.according..to..the..customer’srequiment.ASTM,ANSI ...