Issues related to the use of increased pressure for pressure testing heat exchangers
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The operating pressure specified for refinery heat exchangers at the manufacturer’s plant is on the low side, representing the minimum operating pressure. Now it is necessary to return to the factory to conduct the pressure test again, by simply increasing the pressure level used in that test, without making any other changes. Whether it can be used after passing the tests, and what impacts using it will have.
How can the operating pressure be determined by manufacturing factors? The pressure used for stress testing is determined based on the design pressure, and it has no direct relation to the operating pressure. I’m not sure what the original poster means
The operating pressure of the equipment should be set according to the pressure specified in the equipment’s drawings or nameplate; it has little to do with increasing the test pressure.
According to the regulations, the design pressure should be selected as 1.05–1.1 times the highest operating pressure at the top of the container; if the design pressure is lower than this value, the design is not safe.
According to the regulations, the design pressure should be selected as 1.05–1.1 times the highest operating pressure at the top of the container; if the design pressure is lower than this value, the design is not safe.
The operating pressure specified by 2# jia717 is a range value, but due to human error during the procurement process, the parameter was set at the lower limit of the operating range
3# steven_zhu: For example, if my design pressure is 1.0 Mpa, then the test pressure would be 1.05 Mpa. Using the existing equipment, if the test pressure is increased to 1.6 Mpa, the equipment shows no visible signs of leakage or deformation during testing. Can it be said that the equipment can operate continuously and properly at a pressure of 1.5 Mpa?