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Plastic piping is not often used in chemical plants.
It is widely used in the world.
When using plastic piping, you must assume that there will be leakage.
In chemical plants, where leakage is not tolerated, the points to be aware of when using plastic piping are different from usual.
Do not use fire
No fire is used in the construction of resin piping.
This advantage is very important when using resin piping in chemical plants.
If you have the desire, it is possible to do some construction on your own.
Less freedom
In chemical plants, there is a need to somehow run piping in narrow spaces.
In the case of plastic piping, fixed parts must be combined, so the degree of freedom is low.
Plastic piping is somewhat unpopular among piping designers.
Flanges are only used for connections
Plastic piping is operated with the assumption that it will leak.
In chemical plants, it is only used for water or gas systems.
It is limited to those that will not affect humans or the environment if it leaks.
In that case, flange connections are not really necessary.
Since flange connections are the standard for piping for hazardous materials, some engineers think that only flanges are allowed for connections.
However, if a certain degree of leakage is acceptable, as with plastic piping, I think flange connections should be kept to a minimum.
It would also be fine to think of using flanges only at the joints with metal piping and equipment.
Each company has its own rules, so I don’t think it can be easily changed.