Manufacturing method of long-neck flange water-pressing sealing cover structure

Abstract

The invention provides a manufacturing method of a long-neck flange water-pressing sealing cover structure. The manufacturing method of the long-neck flange water-pressing sealing cover structure mainly solves the problem that the long-neck flange cannot participate in a pressure-resistant test, the strength and the sealing performance of the long-neck flange cannot be tested, and materials cannotbe fully utilized by a conventional pressure-bearing equipment. The manufacturing method of the long-neck flange water-pressing sealing cover structure is composed of the long-neck flange1, a water pressure allowance2, a connecting weld joint3 and an end cover4. The sealing surface form of the lower end of the long neck flange1 is not limited; the end cover4 can be in the form of various forms ofconvex seal heads or flat plates; the end cover 4 is not provided with a hole or is provided with a threaded hole or is welded with a connector for pressing or installing a pressure gauge; the waterpressure allowance2 is at the end part of the inner circle or the groove end of the long-neck flange1, and reservation of the water pressure allowance is carried out when the long-neck flange1 is purchased and processed, after the pressure-bearing test of the pressure-bearing equipment is qualified, the water pressure allowance is processed and removed. The method is novel, practical, advanced andfeasible.

Description

technical field [0001] The invention relates to the field of design and manufacture of pressure vessels, nuclear power equipment, pressure pipelines and other pressure-bearing equipment, in particular to a method for manufacturing a long-necked flange hydraulic sealing structure. Background technique [0002] Pressure vessel nozzle flanges and corresponding flanges or anti-flanges always appear in pairs. For pairs of long neck or high neck butt welding flanges, see figure 1 , in the past, it was still necessary to prepare a new set of hydraulic flat sealing tooling for the pressure vessel flange during the pressure test, see figure 2 . As a result, the corresponding long-necked flange (referred to as the long-necked flange) cannot participate in the pressure test, its strength and sealing performance under the pressure test cannot be tested, and the material cannot be used. As a result, pressure vessel, nuclear power, pressure pipeline and other pressure equipment manufac...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned problems in the prior art, and further provide a long-necked flange hydraulic sealing structure and manufacturing method, which solves the problem that the long-necked flange corresponding to the pressure-bearing equipment in the past cannot participate in the pressure test, cannot Difficulties in carrying out strength and sealing performance inspections and insufficient use of materials

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