压力管道试验方法(国外英文资料).doc

压力管道试验方法(国外英文资料) No special place Pressure test method of pressure pipe Li Linlu (Beijing 100027, labor department boiler pressure vessel testing and research center) Pressure pipeline, because of the large size of the distance, laying way special (sometimes at high altitude, some in the ground), most has the thermal insulation layer or coating, and there are many different kinds of materials, etc. This brings more complexity to the monitoring, inspection and management of the pressure pipe than the boiler pressure vessel. This paper briefly introduces Germanys pressure testing methods, requirements and various methods for new gas pressure pipeline. 1 general requirements All piping should be cleaned before delivery. In the case of water, the test should be dried after the test. The calibration pipe pig should be used in the stress test of an important conveyer, especially with the pressure measurement method. In the case of working medium, it is important to prevent the mixing of medium and air to the explosive limit. 2 test medium According to the experiment method is used in different medium is different, generally speaking test adopted by the media work for water, air or gas (can use other liquid instead of water, can use other inert gases instead of air, work can work with inert gas and gas mixed gas to replace). The corrosion and contamination of pipeline materials should be prevented by the use of experimental media. Taking water as test medium when the water temperature and environmental temperature should be in more than 4 ℃, special measures should be taken when the temperature is low. In addition, the air should be avoided when filling the pipe. For test with air or medium medium, when test pressure is higher than 6 bar, deal with subjects pipe special measures are taken, such as nondestructive testing, etc.) for all of the weld. With water as a medium for pressure testing mainly is suitable for the working pressure is greater than 16 bar of pressure pip