This standard mainly concerns the evaluation method of the anti-corrosion layer of buried pipelines under exposure conditions to the atmosphere. It specifies the requirements of the test piece, the atmospheric exposure process, and the method for evaluating the exposure effect. It is applicable to the evaluation of the natural ageing performance of the anti-corrosion layer of buried pipelines. The standard refers to a series of normative documents, including the cathode disbonding test method for the anti-corrosion layer of pipelines, the specific bendability test method for the anti-corrosion layer, the impact resistance test method for the anti-corrosion layer, the anti-corrosion layer leak detection test method, the non-destructive Measuring method for the thickness of the anti-corrosion layer of pipelines, and the test method for the annular bending performance of the anti-corrosion layer. Its significance is to evaluate the performance of the anticorrosive pipeline exposed to natural climate conditions before burial to ensure that it can withstand the climate aging of the outdoor environment.