China GB3087 Grade 20 Seamless Steel Pipe for Boiler, Find details about China Pipe , Tube from GB3087 Grade 20 Seamless Steel Pipe for Boiler GB20# seamless steel pipeGB T9711.3 for crude oil use seamless steel pipe . Seamless steel tubes for 1, structure GB8162-2008 2, the transmission fluid with seam steel pipe seamless steel tubes for boiler GB8163-20083, high pressure seamless tube with GB3087 -2008 4, boiler GB5310-2008 (ST45.8 1 Ton (Min. Order) < Sponsored Listing 1-100mm Length 5.8m 6m 12m or as customer demand Standard GB DIN ASTM JIS DIN and so on Material 10#, 20 #, 35#, 45#, 16Mn, 32Mn, Q235,K55,Q345,A106Gr. B/A A53,API 5L PSL1,API 5L API 5CT,304 304L 316,316L,ect Package Packing gb3087 grade 20 seamless steel pipe gb3087 grade 20