(1) GB3087-2008 "Seamless Steel Tubes for Low and Medium Pressure Boilers". The chemical composition test method is in accordance with the relevant parts of GB222-84 and GB223 "Chemical Analysis Methods of Iron and Steel and Alloys".
(2) GB/T5310-2008 "Seamless Steel Tubes for High Pressure Boilers". The chemical composition test method is in accordance with the relevant parts of GB222-84 and "Methods for Chemical Analysis of Iron and Steel and Alloys" and GB223 "Methods for Chemical Analysis of Iron and Steel and Alloys".
(3) The chemical composition inspection of imported boiler steel pipes shall be carried out according to the relevant standards stipulated in the contract.
