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August 03,2024
CPS4000HTR HYDROSTATIC TEST

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Purpose of the test

        Test the leakage of vermiculite products in the medium of water , different pressures, and determine the hydrophilicity of vermiculite according to the leakage situation.


Brief introduction of the experiment

Test subjects:

CPS4000HTR 316L inner and outer ring 316L steel with vermiculite filled spiral wound gasket


Gasket size:

DN80 PN50 (HG/T 20631)


Test basis:

GB/T 14180-1993;

See NB/T 20014.15-2010


Test items:

Hydraulic test (1.3 times the medium pressure)


Test process


Install the gasket and calculate the torque of the bolt according to the formula T=K*F0*d(N*m), the bolt size is M20, the specific pressure is 70MPa, and the torque is 175N.

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After the installation is completed, the water pressure starts to 5.5MPa, and no leakage occurs for 3 hours.

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Continue to pressure to 6.5MPa, 10MPa, for 30 minutes, no leakage.

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Then reduce the pressure to 6.5Mpa (1.3 times the nominal pressure), 30 minutes without leakage.

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Open the flange, observe the gasket and flange surface, the gasket surface is relatively intact, and the flange surface has no obvious vermiculite adhesion.


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The used winding gasket was re-installed and pressed, with a pre-tightening force of 175N, and no leakage was observed after 30 minutes.

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Regarding more test results of CPS vermiculite series products under different working conditions, we will continue to update them in the future.




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