This article discusses in detail about Accumulation Pressure Test Of Boiler and how it is done. Let’s read it in detail. The accumulation pressure test is also known as the overpressure test, and it is used to check the safety valves and other pressure-bearing components of a boiler. During the test, the safety valves are removed from the system and replaced with blind flanges or other devices that prevent the release of steam. This ensures that the pressure inside the boiler can be raised without any safety valves opening.
Accumulation Pressure Test Of Boiler-What is it?
The test involves gradually increasing the pressure inside the boiler to a predetermined level, which is typically 1.5 times the maximum allowable working pressure of the boiler. The pressure is then held steady for a specified duration, which is usually around 15 minutes. During this time, the boiler components are closely monitored for any signs of distress, such as leaks, deformations, or unusual vibrations.
One of the primary objectives of the accumulation pressure test is to verify that the safety valves will open at the correct pressure and release enough steam to prevent the pressure from exceeding the maximum allowable working pressure. This is typically done by measuring the amount of steam released by each safety valve during the test and comparing it to the manufacturer’s specifications.
Another objective of the test is to detect any weaknesses or defects in the pressure-bearing components of the boiler, such as the shell, tubes, and headers. This is done by monitoring the pressure and temperature of the boiler during the test and observing the behavior of the components.
In summary, the accumulation pressure test is a critical test that helps ensure the safe and reliable operation of boilers. It is important to follow industry standards and guidelines when conducting the test to ensure accurate results and prevent accidents or damage to the equipment.
Procedure To Do This Test
Here is a step-by-step process for conducting an accumulation pressure test in a boiler:
- Ensure that the boiler is properly prepared for testing, including cleaning and draining as necessary, and that all equipment and instruments are calibrated and in good working condition.
2) Identify the maximum allowable working pressure (MAWP) of the boiler and calculate the target pressure for the accumulation test, which is typically 1.5 times the MAWP.
3) Install blind flanges or other devices to block the safety valves and prevent the release of steam during the test.
4) Fire the boiler and slowly raise the pressure inside the boiler to the target pressure, taking care to monitor the pressure gauge and other instrumentation to ensure that the pressure is increasing steadily and that there are no signs of distress or leakage in the boiler components.
5) Once the target pressure is reached, hold the pressure steady for the specified duration of the test, typically around 15 minutes. During this time, closely monitor the boiler components for any signs of distress, such as leaks, deformations, or unusual vibrations.
6) Measure the amount of steam released by each safety valve during the test and compare it to the manufacturer’s specifications to ensure that they are operating correctly.
7) Record all measurements and observations during the test and compare them to previous test results and industry standards to identify any trends or deviations.
8) Once the test is complete and the pressure has been released from the boiler, inspect all components for any signs of damage or wear and make any necessary repairs or replacements.
9) Document the results of the test and any maintenance activities in the boiler logbook or other records.
It is important to follow industry standards and guidelines when conducting the accumulation pressure test and to allow sufficient time to ensure accurate and reliable results. Additionally, it is critical to prioritize safety and to take appropriate precautions to prevent accidents or damage to the equipment.
