Is it necessary to install a safety valve on high-pressure liquid delivery pipelines?
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For high-pressure liquid delivery pipelines, in order to prevent pulsations in the pipeline from damaging downstream equipment, is it necessary to install safety valves on such pipelines?
For example, in the case of acid and alkali pipelines or pipelines for hazardous chemicals, the pressure is released and returned to the corresponding collection tank.
Also, is it necessary to conduct annual inspections for such safety valves?
Annual inspection is **mandatory; it must be carried out annually**
Liquid pipelines are not covered by the category of pressure pipelines; I don’t think annual inspections are necessary
If it is a pressure pipeline, a safety valve must be installed, and it requires annual inspection. If there are pulsating vibrations in high-pressure liquid pipelines, a buffer tank can be added to reduce or eliminate them. Now, design institutes equip all circulating water pipelines with safety valves and burst discs.
It’s more hassle-free with you, but the maintenance costs increase; the safety valve will start leaking internally after being used a few times
In the case of a petrochemical plant, whether to install safety valves and how to do so are determined by qualified design firms. The construction unit only has the right to make suggestions and to set requirements regarding the quality of safety valves. It won’t require you to get involved in other matters.
The key is to determine whether there is a risk of overpressure; it has nothing to do with the pipeline pressure
It mainly depends on whether there are devices that require overpressure protection in front of or behind the pipeline, and whether pressure buildup could occur to exceed the stress tolerance of the pipeline material.
There is no specification that explicitly states that safety valves on non-pressure vessels and pressure pipelines do not require annual inspection. Article B6.3.1(1) of the \"Regulations on Safety Technology Inspection of Safety Valves\" (TSG ZF001-2006) requires that \"safety valves shall be regularly calibrated, at least once a year; in cases where relevant safety technology regulations provide different requirements, those regulations shall apply.\" To put it simply: if a safety valve is installed but not inspected periodically, how can we be sure that it will operate reliably in an emergency? If it cannot be ensured that it will activate at the set pressure, what’s the use of installing a safety valve?