seamless steel pipe ASTM A106 GR.B we supply Seamless steel pipe/line pipe/ casing /tubing/Couplings Hot rolled round seamless steel pipe/Cold drawn round seamless steel pipe Welcome to inquiry. Tel:0086-635-5100827 Fax:0086-635-5100830 Mobile&WhatsApp:0086-15966276872 Skype:angelashandong Email:[email protected] Made in China