What Is The Latest Version Of Gb/T 9711? What Are The Significant Changes?

The latest version is GB/T 9711-2023, which will be issued in November 2023 and implemented in March 2024, completely replacing the 2017 version. The new standard docking API Spec 5L-2018, core changes include: new technical requirements for pure hydrogen transmission pipeline; Strengthening material control (e.g. carbon content ≤ 0.07%, carbon equivalent ≤ 0.15); Improved mechanical property requirements (Charpy impact work increased to 94J); Introduction of hardness full domain control, digital radiographic inspection, etc.