Exam Question
(a) What is pressure accumulation, test for boiler and what is its purpose (6)
(b) Describe the procedure to carry out pressure accumulation test (10)
Class 4 (4th Engineer)
MEP
📅 Feb 2023
Reference Answer
### (a) Pressure Accumulation Test: Definition and Purpose (6 Marks)
**1. Definition of Pressure Accumulation Test:**
The Accumulation of Pressure Test is a mandatory performance trial conducted on a boiler's safety valves to verify their relieving capacity. It is a practical test designed to simulate a worst-case scenario where the boiler is operating at its maximum firing rate, but with no steam being drawn from it (i.e., the main steam stop valve is closed).
The key objective is to determine if the safety valves can discharge steam at a rate equal to or greater than the boiler's maximum steam generation rate, thereby preventing the boiler pressure from rising to a dangerous level.
**1. Definition of Pressure Accumulation Test:**
The Accumulation of Pressure Test is a mandatory performance trial conducted on a boiler's safety valves to verify their relieving capacity. It is a practical test designed to simulate a worst-case scenario where the boiler is operating at its maximum firing rate, but with no steam being drawn from it (i.e., the main steam stop valve is closed).
The key objective is to determine if the safety valves can discharge steam at a rate equal to or greater than the boiler's maximum steam generation rate, thereby preventing the boiler pressure from rising to a dangerous level.
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