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工作压力大于10MPa的管道被称为高压管道,其特点是长期在高压、高温下工作。若管道遭破坏将发生火灾、爆炸、人身或设备事故。对此,专业监理常采用“三看”法予以管理。1.看管道安装质量焊接时,应尽量减少固定焊口,特别要减少水平固定焊口,焊接完成后应做射线探伤。管道与支架接触处,应设置木垫块、橡胶石棉垫片等。阀门应按设计要求设置,且位置、间距、手轮开启方向合理。法兰连接时,在螺栓上涂二硫化钼防腐剂。法兰拧入时,应使管
Pipelines with working pressures greater than 10 MPa are called high pressure pipelines and feature long-term operation at high pressures and temperatures. If the pipeline is damaged, a fire, explosion, personal injury or equipment accident will occur. In this regard, professional supervision often use “three see ” method to be managed. 1. To see the pipe installation quality welding, welding should be to minimize the fixed, in particular, to reduce the level of fixed welding, welding should be done after the ray flaw detection. Pipe and bracket contact, should be set wooden pad, rubber asbestos gasket. Valve should be set according to design requirements, and the location, spacing, hand wheel opening direction is reasonable. When flanged, apply molybdenum disulfide preservative on the bolt. When the flange is screwed in, the tube should be made