High pressure flange construction procedure and application features

    In a sealed place daub high-temperature sealant and adjust the flange clearance, ensure the selected readings at 8 deviation of not more than 0.3 mm. And then bolts for high pressure and can proceed with manual wrench screw nut first, until the nut bottom and flange surface contact, between the bolt and nut, nut and flange between filling lubricating oil; Then use two KRP35 drive type hydraulic torque wrench bolt fastening, according to the bolt fastening symmetric number each step and at the same time two bolts, bolt fastening flange bolt pre-tightening force phases step by step, every step to tighten the hydraulic oil pressure end pressure respectively 30%, 50%, 70%, 100%, 70% and 16.5 MP a, 26.5 MPa, 37.5 MPa, 53 MPa, 53 MPa; The bolt fastening must be conducted in accordance with the provisions, the order of the group; After completion of each stage the bolt fastening process, shall be measured