(1) As specified in GB/T 3087-2008, "Seamless Steel Tubes for Low and Medium Pressure Boilers": Test methods for chemical composition shall comply with GB 222-84 and the relevant sections of GB 223, "Methods for Chemical Analysis of Iron, Steel and Alloy."
(2) As specified in GB/T 5310-2008, "Seamless Steel Tubes for High Pressure Boilers": Test methods for chemical composition shall comply with GB 222-84 and the relevant sections of GB 223, "Methods for Chemical Analysis of Iron, Steel and Alloy."
(3) Chemical composition inspection of imported boiler steel pipes shall be conducted in accordance with the relevant standards stipulated in the contract.
