seamless pipe : For the use of low, medium and high pressure boiler, marine, fluid transport, petroleum cracking, fertilizer ... Seamless steel pipe steel tubeFor the use of low, medium and high pressure boiler, marine, fluid transport, petroleum cracking, ... , DIN 1626/17175Application: used for liquid conveyance, low&medium pressure boiler, high pressure boiler, heat exchangerSTANDARD: GB/T8163-1999, GB ...