Anti-corrosion patching technology for the outer wall of buried pipelines
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I need everyone’s help: The repair technique for the external anti-corrosion weld areas of long-distance pipelines involves the use of PE anti-corrosion tape for repairs, and I’ve been quite confused regarding this. Specifically, I’m unsure about the requirements for applying the primer as well as the relevant process parameters, such as the heating methods and how to control the temperature； Second is the construction technique for anti-corrosion tape: what is the baking time, how should the top and bottom of the pipe be baked, and how should the procedural instructions be written? Could those with expertise in on-site processes please share their insights on how to ensure the quality of repairs?
Please refer to CJJ104-2005 Technical Specifications for Direct-Buried Steam Pipes in Urban Heating Systems and CJJT81-98 Technical Specifications for Engineering of Direct-Buried Heating Pipes in Urban Areas
Reply to 2# hlytyy: Thank you, friend from floor 2! I checked the standards you mentioned; they are applicable to heated pipelines. Are there any standards specific to the repair techniques for the external anti-corrosion coating of uninsulated pipelines?