I would like to ask the experienced colleagues: how should the discharge capacity of the safety valves in LNG transmission pipelines be calculated?

2020-06-12View Original

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As the title suggests, I would like to ask the experienced colleagues: after an emergency shutdown of an LNG transport pipeline and both ends of it are sealed, the LNG inside may expand due to heat or vaporize, which can cause overpressure in the pipeline; therefore, a safety valve needs to be installed. How should the discharge capacity of such a safety valve be calculated? Are there any relevant calculation methods specified in API 521?

Reply #22020-06-13

GB/T 37816-2019

Reply #32020-06-22

When the pipe is full, the liquid expansion conditions specified in API 521 shall be applied; when the pipe is not full, calculations based on the heating of pressure vessels shall be used

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I would like to ask the experienced colleagues: how should the discharge capacity of the safety valves in LNG transmission pipelines be calculated?

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