Clamp material
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When the pipeline temperature is high (above 400), what material should be used for pipe clamps? Should it be a material similar to that of the pipe? Are there any relevant regulations that can be referred to?
The material for general supports and hangers is Q235-A; for temperatures above 400 degrees, steel grade 20 or similar should be used. Specifically, standard components need to be selected based on the manuals and specifications. The pipeline support and hanger manual or relevant support and hanger specifications should specify the operating temperature.
For temperatures below 300 degrees, Q235 is usually used. I couldn’t find any relevant manuals regarding the choice of materials for higher temperatures; I’m not familiar with this aspect of materials. Does this relate to stress or to the operating range of the material?
Quoted from the 2007 edition of the Handbook on Supports and Brackets for Steam and Water Pipelines in the power industry: When t>450℃, the material used is 12Cr1MoV; when 450℃≥t>300℃, the material is steel 20; when t≤300℃, the material is Q235-B”
For example, if the pipeline materials are A335 P22 and A358 321H, what materials should be used for the pipe clamps?