The high-pressure system is mainly composed of pipelines,fittings,equipment,and in-struments.It is mainly defined according to the pipeline pressure and refers to medium pipelines with a working pressure of 10＜P≤100 MPa.It is mainly used in the production of synthetic ammonia,urea,methanol products,and petroleum hydrocracking in the refining and chemical industry.Taking the production capacity of 300 000 ton/year of paraffin hydrogenation unit as an example,this article analyzes the construction technology and management methods used in the construction of the high-pressure system of this unit,mainly including material procurement and entry inspection control,ma-terial arrival management,process refinement,high-pressure sealing management,strict control of welding quality,and management of pipeline pressure test and leakage test.The above management methods and technical measures are adopted to strictly screen out materials with quality issues,and timely repair and replacement treatments are carried out to maintain extremely high welding quality and high-pressure sealing quality,and achieve the effect of passing the pipeline pressure test at one time,delivering the project on schedule,and successfully putting the device into operation at one time.Prac-tice has shown that the above methods are relatively effective,and can provide practical reference for similar project construction.
关键词
高压系统/阀门试压/红丹密封试验/定力矩紧固/高压密封
Key words
high-pressure system/valve pressure test/lead tetroxide seal test/constant torque tight-ening/high pressure seal
维普
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