Plastic insulators are used, when environment carrier pipeline goes through casing pipe, in order to prevent friction between those pipes.
Plastic (polypropylene) insulators have several advantages:
- easy to install; friction coefficient is lowered to minimum due to characteristic of plastic
- low friction prevents external damages of pipe
- a wide range of skid heights ensures concentricity of the carrier pipe in the casing if required
- excellent insulating properties of the plastic material ensures all requirements of cathodic protection between metals
Plastic insulator rings are normally installed with the following spacing:
Pipe diameter up to: 300 mm at a spacing of 2,5 m
400 - 600 mm at a spacing of 2,0 m
> 600 mm at a spacing of 1,5 m
In particular cases, the ring distance may be modified after having examined the installation situation.
We offer a wide range of insulator rings. The most popular types are AZ/AC, PA/PE and GKO.
AZ/AC type insulator rings are used for pipe O.D. from 98 to 385 mm and consist of several segments. The number of segments depends on the carrier pipe’s O.D..
GKO type insulator rings are the latest PSI Insulator generation. Due to the bolt less wedge system the installation can be achieved quick and easy. Insulators are connected with special wedges. Depending on the model, GKO type insulators are used for pipe up to size DN2500.