... A106cST45.8/3GB5310-95ASTMA106-99DIN17175-79 Heat-resistant high-pressure boiler seamless steel pipe16-824×2-65 Hydraulic prop tube 27SiMnGB5310 ... -resistant, corrosion-resistant Seamless pipe for Petroleum, chemical, electric power,Boiler industry16-824×2-100 Casing pipe J55 N80, P110API SPEC ... 5L GR.B, X52,X60 API-for petroleum,natural gas, industrial dilivery(gas,water,oil)60-630×1.53-40 Rectangular ...