black steel pipe, hot galvanized steel pipe and powder coating steel pipe, according to standard: ASTM, BS, EN, DN, JIS. We can produce and supply to you various steel pipes according ... and service.Production standard: ASTM A53, BS1387, EN10255, EN10240, EN10220, EN10219, EN39Section type: round, square, rectangular, oval and other special section type seamless steel pipe ...