Must the handle of valves in chemical plants be lined with plastic?
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From a safety perspective, it is required that the valve handles be lined with plastic; the reason given is to prevent sparks from being generated in case the metal handle falls, which could pose a danger. Are there any standards stipulating that valve handles must be lined with plastic? If lining is necessary, what are the requirements, such as the material of the lining and its thickness? ? ? ?
There seems to be no mandatory requirement in this regard.
There are requirements for the explosion-proof areas in Class A workshops; it’s better to simply use copper handles.
There are no mandatory requirements in this regard; Class A workshops must use copper tools
Chemical plant. . For all the ball valves we use, we have never seen valve handles with plastic lining; only tools such as wrenches have such requirements. To put it simply, although copper tools are specified, iron tools are actually used in most cases on site: L
There are no regulatory requirements for this, but some factories located by the sea install plastic pipes or apply oil to prevent salt corrosion, which also helps to prevent iron shavings as you mentioned
What we requested were plastic-lined or rubber-coated gaskets, but the results weren’t very good； Or fix the valve handle to the valve; for the ball valves purchased in batches, there is a screw on the valve core that can be used to secure the valve handle ；
It seems reasonable from a safety perspective, but I couldn’t find the specific source.
We didn’t buy those either, so we buy them and then have the company carry out separate plastic lining. . . .