Hydraulic pipe pressure test method

Abstract

The invention relates to a test method of a hydraulic pipe. In a hydraulic pipe pressure test method, a pressure test is performed before oil flushing; a medium of the pressure test is a flushing medium, and is input to the hydraulic pipe by an oil flushing device; the test pressure is provided by an external high-pressure pump; in the pressure test, the oil flushing device is started, a high-pressure ball valve c is closed, and other high-pressure ball valves are all opened, and a whole loop is fully filled with the flushing medium through a low-pressure circulation; a high-pressure ball valve b and a high-pressure ball valve m behind the oil flushing device are closed, a high-pressure ball valve c and a high-pressure ball valve k are opened, the high-pressure pump is started, and air is released when the pressure rises up to 3 MPa and 5 MPa; then, the test pressure is gradually increased, and is stabilized for 3-5 minutes when reaching every level; after the test pressure is reached, the pressure is stabilized for 10 minutes; then, the pressure is reduced to working pressure for checking; and the qualification is achieved when all welding lines and connecting ports of a pipe P, a pipe A and a pipe B in a system have no oil leakage and the pipes have no permanent deformation. The hydraulic pipe pressure test method thoroughly and comprehensively checks the construction quality of a hydraulic system for all high-pressure pipes in the hydraulic system.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a test method for a hydraulic pipeline. Background technique [0002] In the metallurgical equipment installation project, various media piping systems are the lifeblood of the normal operation of the production line, especially the hydraulic lubrication system piping plays a pivotal role. Thousands of meters of piping are like the "vessels" of the entire project, providing the unit with Hydraulic power, equipment lubrication and other media, the quality of hydraulic pipeline construction is directly related to the success or failure of the entire project, and the pressure test is a key means to comprehensively and thoroughly test the construction quality of the hydraulic system. [0003] The traditional pipeline pressure test is usually carried out after the first oil flushing and before the second oil flushing, and the pressure test medium is the working medium. see figure 1 During the p...

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Problems solved by technology

[0004] The above-mentioned pipeline pressure test uses the official pump of the hydraulic station to pressurize, and the pressure cannot reach the test pressure; and the traditional hydraulic pipeline pressure test only tests the P pipe in front of the valve table, and the AB pipe behind the valve table does not participate in the pressure test. The pressure fluctuation caused by the impact load generated by the action has a large peak pressure, which is much higher than the system pressure during normal use, and mainly acts on the AB pipe behind the valve table, so the pressure test range of the traditional hydraulic system is not comprehensive

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