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News
The high-pressure pipe sections, pipe fittings, fasteners, and valves used for installation must be inspected and qualified, and the corresponding technical certification documents should be attached.
Before installation, the inner and outer surfaces of the high-pressure steel pipe should be wiped clean, and the inner channel should be checked for foreign matter and unobstructed. Check whether the roughness of the sealing surface of the nozzle and the gasket meets the requirements, and there should be no scratches (especially radial scratches), spots and other defects that affect the sealing performance on the sealing surface. The sealing surface of the mouth and the gasket are coated with oil, butter and white vaseline to protect the surface.
The threaded part of the pipe end of the high-pressure pipe that has passed the inspection should be coated with a mixture of molybdenum disulfide grease and graphite oil to protect the surface, except for the pipe that is degreased.
When the pipeline is installed, a formal pipe frame should be used for fixing, and a protective sleeve should be installed on the pipe frame in contact with the high-pressure pipe and pipe fittings according to the relevant design requirements.
When installing the gasket, it is forbidden to hang the metal wire. The nozzle and gasket should be coated with butter, and the soft metal high-pressure gasket should be accurately placed in the sealing seat. Flange bolts should be tightened symmetrically and evenly. After the bolts are tightened, the two flanges should be kept parallel and concentric, the threads exposed outside the nut should be 2-3, at least not less than 2, and the exposed length of each bolt should be consistent.