【Help】What are the general requirements for equipment insulation, and what results should be achieved?
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On site, it was observed that some pipes had their original insulation layers damaged for various reasons; after being repaired by professional insulation teams, they were put back into use. But seeing a phenomenon like the one in the picture, I’m not sure if this counts as achieving insulation effects. Is this considered acceptable? It seemed there wasn’t as much dew formation before. By the way, what standards are used to inspect cold-insulation work?
It has some effect, but that effect is rather poor.
I just feel it’s not very reliable; I’d like to ask how to determine whether it’s of good quality What are the guidelines?
You can consult Mr. Hua Lisu from Tianjin Hualisu; they specialize in cold storage solutions. Their phone number is 18622137070.
1. Unqualified, severe cold flow. 2. The standards adopted are as follows: \"Rigid polyurethane foam plastic for building insulation\" GB/T 21558-2008, \"Foam glass insulation products\" ASTM/C552, \"Design codes for insulation engineering of industrial equipment and pipelines\" GB50264-2013, \"Construction codes for insulation engineering of industrial equipment and pipelines\" GB50126-2008, \"Acceptance codes for insulation engineering of industrial equipment and pipelines\" GB20185-2010, \"Design codes for insulation engineering of petrochemical equipment and pipelines\" SH/T3010-2013, \"Construction standards for petrochemical insulation projects\" SH/T3522-2003
Cryogenic pipelines? How thick is the insulation layer? Polyurethane or foam glass? Was it sealed with tragacanth? Was the pipe dew cleaned during construction? Is the environmental humidity meeting the requirements?
In the diagram, the temperature of the fluid in the pipes is around –5 to 8°C. The insulation material used is polyurethane, with a thickness of approximately 50 mm. It’s possible that the dew formed during installation was not completely removed; as for the other details, they are not very clear: L
Once water gets into this polyurethane, its insulating performance is significantly reduced.
The insulation material needs to be replaced, as the current insulation performance is not up to standard
Besides polyurethane, which material would be more appropriate?
It was the same materials before too. I suspect it’s more of a construction issue, or an issue with coverage. For example, in places where there are valves, and at the connections between pipes and containers, etc