Analysis of New Edition of Standard GB/T 9711 for Steel Linepipe

Briefed here in the essay is the development history of Standard GB/T 9711. And the differences in contents between the latest edition and the old edition of the said standard are comparatively analyzed，and accordingly some suggestions for implementing the new edition standard are proposed. Also briefed here are the characteristics of relevant foreign advanced standards for oil/gas transmission pipelines such as API Spec 5L/ISO 3183，CSA Z245.1 and IOGP S- 616，etc. The differences between the new edition GB/T 9711 and the above mentioned foreign advanced standards are also comparatively analyzed. It is concluded via the comparisons and the analyses that the revisions of the contents of GB/T 9711 are not so obvious；when using the standard，notice should be taken to the issue of quotation of the standard concerning the NDT. In general the said new edition standard has been up to relevant international advanced level. However there still exist gaps with foreign standards like CSA Z245.1 and IOGP S-616. It is suggested to properly conduct the benchmark analysis and research of related foreign advanced standards in a bid to continuously improving the quality level of domestically-made steel pipes for oil/gas transmission pipeline service.