1.pipe line 2.Mainly export to Southeast ... pipe for low and Medium pressure BoilerGrade:10,20 StardandGB3087-2008,ASTM A179,ASTM A192,ASTM ... 946. ApplicantSeamless steel pipe for Petroleum CrackingGrade:10,20,12CrMo,15CrMo,1Cr2Mo,1Cr5MoStardandGB9948-2006,JIS G3441-19887. ... heat conveying equipments6), ASTM A192 For manufacture wall panel,economizer,reheater,superheater and steam pipeline of boilers. ...