... Steel Pipe with High Quality 1.WT:4-70mm OD:25-370mm 2.Certification:API 3.Professional manufacturer ASTM A106 GR.B ... temperature resistant,Low temperature-resistant, corrosion-resistant Seamless pipe for Petroleum, chemical, electric power,Boiler industry16-824×2-100 ... Pipeline seamless pipe10-530×1.5-36 high-pressure seamless pipe for chemical fertilizer equipment 20,16Mn,Q345GB6479-2000Fertilizer ...