Is heat treatment required after welding GD1 pipes, and what are the relevant standards?
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The process pipelines involve welding of GD1 and GD2 pipes; I would like to ask whether heat treatment is required after welding, and what are the specific standards for this?
Personally, I think GD1 requires heat treatment, as the need to handle extremely or highly aggressive media demands heat treatment
1. GD1 and GD2 belong to power pipelines, and the **standard GBT32270** applicable to such pipelines is in its 2015 version. 2. The specifications contain provisions regarding heat treatment after welding: 2.1. Normative reference documents, such as the Welding Procedures for Thermal Power Plants; 2.2. Section 7.6 of the specifications deals specifically with heat treatment issues
There are welding procedures for thermal power plants; go and take a look