Home / Standards / GB 3087-1999 GB 3087-1999 Abolished Seamless steel tubes for lowand medium pressure 低中压锅炉用无缝钢管 Standard Type GB ICS 77.140.30 CCS H48 Status 废止 Issue Date 1999-11-01 Implementation 2000-08-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会