GB 16749 is a national standard for corrugated expansion joints of pressure vessels in China. It specifies the design, manufacture, inspection, acceptance, storage, installation, basic parameters and dimensions of metal corrugated pipe expansion joints in detail. This standard was originally released in 1997, but has been replaced by GB/T 16749-2018, which is a new version released on September 17, 2018 and officially implemented on April 1, 2019.
GB/T 16749-2018 is applicable to unreinforced single-layer or multi-layer U-shaped expansion joints for steel pressure vessels, steel shell-and-tube heat exchangers and atmospheric pressure vessels, and it is also applicable to the reference use of pipeline expansion joints. This standard covers the requirements for the design, material selection, manufacturing process control, inspection and testing, marking, packaging and transportation of pressure vessel corrugated expansion joints.
In the GB/T 16749-2018 standard, you can find the following regulations:
The type, size and nominal pressure class of the expansion joint.
Selection and requirements of materials.
Design calculations, including stress analysis, displacement capacity, and fatigue life.
Manufacturing process and quality control.
Inspection and testing procedures, including non-destructive testing and pressure testing.
Installation instructions and maintenance recommendations.
If you are dealing with a project related to a pressure vessel or piping system and need to use a corrugated expansion joint, then it is very important to follow GB/T 16749-2018 standard to ensure the safety and reliability of the expansion joint. It is important to note that any engineering project should use the latest version of the standard to comply with the latest regulatory and technical requirements.