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Title: AGA Plastic Materials Committee White Paper On Peelable Pipe
Author: Gene Palermo, Jeremy Bowman
Source: American Gas Association 2010
Year Published: 2010
Abstract: Plastic pipes are the primary materials used for the distribution of natural gas, and this success has been based on single material solid wall plastic pipes. Based to a large extent on European technology, there are now an increasing number of multi-layered plastic pipes being used in the gas industry and in other applications. This AGA White Paper describes a multi-layered peelable pipe, which consists of a pressure rated core polyethylene (PE) pipe, and a sacrificial peelable skin made from polypropylene (PP). Additionally, information is provided on peelable pipe structure, skin adhesion, electrofusion (EF) joint performance when EF fittings are joined to the PE core pipe, and details on the new ASTM D 2513 Annex A7 for peelable pipe. This new multi-layer pipe retains all the positive values of solid wall PE pipe, but provides two benefits. First, the outer PP skin may be peeled off before making an electrofusion joint to expose the virgin PE core, thus eliminating the need to scrape the pipe. Second, the outer PP skin provides additional protection to the core PE pipe during robust installation techniques, such as, horizontal directional drilling, pipe bursting and insertion renewal.

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