... service,ptroleum craking,chemical fertilizer equipment,high pressure boiler,low & mid-pressure boiler,etc.Stainless Steel Pipe300 ... -200mmApplied to electric power,resisting very high or low tempreture,chemical industry,petroleum service,corrossion resistant,etc.High- ... .GB3087-199910-426mm, 2-40mmFor industrialboilers of low & mid-pressure fluid conveying pipeFluid Pipe10# 20# Q345B Q345C Q345DGB ...