... A213mhigh-temperature resistant,Low temperature-resistant, corrosion-resistant Seamless pipe for Petroleum, chemical, electric power,Boiler industry16-824×2- ... seamless pipe10-530×1.5-36 high-pressure seamless pipe for chemical fertilizer equipment 20,16Mn,Q345GB6479-2000Fertilizer Equipment-pipeline25 ... 4.5 line pipe 5L GR.B, X52,X60 API-for petroleum,natural gas, industrial dilivery(gas,water,oil)60- ...