Steel Pipe, Greenhouse, Container House manufacturer / supplier in China, offering Petroleum and Natural Gas Steel Pipes En ISO 3183 L360ne L415ne, ISO En DIN 3183 X70qe X65qe X60qe X52qe Seamless Steel Pipes, Seamless Steel Pipes Sr DIN En ISO3183 Psl2 L360ne L290ne L415ne and so on.