seamless pipe manufacturer Boiler tube GB3087 Yanshan Qianyi Pipe Industry Co.,Ltd supply all the kinds steel pipes and pipe fittings. The standard:ASTM ,JIS,DIN ,GB/T And the API products run in accordance with API 5L . *Pipe: seamless pipe,stainless pipe,alloy pipe,galvanized pipe ,ERW,SSAW *Fittings: elbow,tee,flange,reducer,cap *Boiler tube Standard:GB3087,DIN17175,GB5310,ASME SA-106M-213M,JIS G3461 Material:10#/20#/St35.8/45.8/15Mo3/13CrMo44/10CrMo910/14MoV63/12Cr1MoV/20G/20/25MnG/15/20MoG/12CrMoG/12Cr1MoG/12CrMoWVTiB/10Cr9Mo1VNb/SA-106-213T91/STB340/410 Size: 1/8”-36” Uses: for manufacture wall panel ,economizer,reheater,superheater and steam pipeline of boilers.