Abstract: Addressing the revision of GB/T 5310 Seamless Steel Tubes and Pipes for High Pressure Boiler,some considerations and discussions are taken,involving such aspects as popularization and application of the ISC number to boiler tubes and pipes,standard-acceptance of new materials,hydrostatic test,requirements for grain size of fine-grained creep-resistant stainless steels,etc.Accordingly some suggestions are proposed for the revision of the above said national standard.