Discussion on the pre-welded components of Type N pipe racks in the HG/T21629-2021 pipe rack standard drawings
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As shown in the HG/T21629-2021 pipe rack standard, there are no gaskets between the pre-welded components of Class N pipe racks and the equipment itself； I’m not sure how everyone carries this out in practice.
According to this standard, there are no gaskets between the Class N pipe rack prefabricated parts and the equipment body. In practice, we should design and install in accordance with this standard to ensure compliance with its requirements. If shims are to be used in practical applications, it is recommended to conduct thorough analysis and verification during the design phase to ensure that their use does not affect the stiffness and stability of the pipe rack, while also complying with relevant **standards and specifications. During the actual construction process, it is necessary to strictly adhere to relevant safety standards and operating procedures to ensure construction quality and project safety. .
It’s up to you to decide whether to use shims; this is the standard for pipe racks. The pre-welded components fall under the category of equipment, and the standards only specify the dimensions of the connections.
The part connected to the device is shown in dashed lines, indicating connection to the device. For specific equipment pre-welded parts, the relevant specialty definitely has the drawings.
In this standard, Class D pipe racks are equipped with shims. So, what is the role of the shimming plate? Improve mechanical properties or material insulation?
The shims serve to fill and reinforce. For other types of pipe racks not mentioned, the standard drawings can be followed.
This has nothing to do with pipe supports
Pre-welded parts – the “pre” in this term indicates that these elements are incorporated during the manufacturing of the equipment, just like the device’s connectors. In future construction, the other half will be connected with bolts