Issues in the design and manufacturing of equipment with fiberglass-reinforced plastic linings?
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Which standards should be referred to for the design and manufacturing of equipment with fiberglass-reinforced plastic linings? If available, could they be shared? Thank you very much!
Fiberglass lining plastic? Fiberglass already has anti-corrosion properties, so why does the original poster still need to line it with plastic? What is the medium used in the process operation by the original poster? Could you explain it more clearly so I can learn too*! I have worked on fiberglass-reinforced plastic equipment as well as equipment with plastic linings, but I have never seen equipment that has both a fiberglass-reinforced plastic lining and a plastic lining I’m not sure whether it’s because the original poster didn’t explain things clearly or I misunderstood
2# lanye55: There is no error in the description; it refers to fiberglass lined with thermoplastic material. In this case, the material used for lining is polyvinylidene fluoride. This type of structure is called Dual laminates in English.
There is something wrong with this statement; this is a glass fiber reinforced plastic, and its manufacturing process is different from that of lining equipment.
Replying to the person above: this method works. For example, hydrochloric acid pipelines are made of plastic, but due to long-term use, they can deform in the pipe racks; if the pressure inside the pipeline is high, the plastic pipes can break, which not only contaminates the environment but also poses a risk of injury to people. If a fiberglass lining is used with plastic, not only is the strength of the pipe increased, but there is also no risk of leakage!
Original poster, when we manufacture equipment made of materials such as PVC/FRP, PP/FRP, etc., the production, inspection, and acceptance of the PVC and PP linings as well as internal components are carried out in accordance with the standard HG20640-1997 \"Plastic Equipment\". I’m not sure whether this standard is suitable for your needs.
Fiberglass lined with plastic – both are corrosion-resistant; it’s redundant, right?； There may still be no way to carry out the construction of plastic-lined fiberglass, as it is not possible to achieve a tight bond between the plastic lining and the fiberglass ； It is recommended to use a steel substrate with plastic coating; plastic powder can be thermally sprayed onto the steel surface to ensure a strong bond between the plastic coating and the steel, and there are established methods for carrying out this process.
Due to the poor strength and weather resistance of plastics, fiberglass-reinforced plastic is often wrapped around or hand-laid on the outside of plastic pipes in order to enhance their strength and protect them from ultraviolet rays； For lining equipment, a casing is first created, and then fiberglass, plastic, rubber, etc. are used to line the inner walls of the equipment.
In standard 6# Chengshire, what do rigid polyvinyl chloride and modified polypropylene refer to respectively? Could you explain it, please?
I am well aware of what the original poster is referring to; Dual Laminate Vessels & Piping are a type of composite structural equipment and piping that is widely used in North America and Europe. It is mainly composed of two layers: Liner + FRP, that is, the inner liner and the fiberglass layer. The inner layer is mainly for corrosion resistance, while the outer layer is primarily for mechanical reinforcement. The standard used in North America is ASME-RTP1, with the latest version being from 2007. There are also European standards, primarily the German standard AD-2000-Merkblatt.
The owner is likely referring to PVDF/FRP equipment. PVDF is a material with a relatively high price, and it is more difficult to weld than PVC and PP.