With the rapid development of domestic and foreign gas transmission pipeline construction, the pressure test of the pipeline has become an indispensable and important link. Before and after the pressure test, each section of the pipeline must be subject to ball cleaning, which is generally 4-5 times. Especially after the pressure test, it is difficult to clean the water in the pipeline, and the cleaning times will be more. The construction method of repeatedly welding the head at the ball receiver has the following problems: first, increase the labor intensity of workers; Second, the repeated welding head method has high consumables, requires many large-scale equipment and costs. In view of the problems of high labor intensity, high consumables, large number of large-scale equipment and high cost caused by the repeated welding head method at the launching place when the long-distance pipeline is cleaned after the pressure test, a new simple quick opening flange blind plate construction method is proposed. The construction method introduces the structure, working steps and strength check of the quick opening blind plate.
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