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What are non-independent pressure vessels in cryogenic units and direct-fired absorption refrigeration units?

2017-08-04View Original

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Question: In clause 3.3.2 of the new version of TSG08-2017 Regulations on the Use and Management of Special Equipment, there are several definitions that are not clear regarding pressure vessels that do not require registration. 1. What are non-independent pressure vessels in cryogenic installations? Is there a precise definition for cryogenic equipment? Which standard can be looked up? What are non-independent pressure vessels? 2. Pressure vessels in direct-fired absorption refrigeration units? What does this type of equipment mainly refer to? I thought it was a central air conditioner, but how can a direct-fired type be explained?

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