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03/03/2009

Low ovality coils

Following investment in its pipe manufacturing process, GPS PE Pipe Systems has introduced low-ovality coiled PE pipe to the water and gas industries. Contractors and end users will benefit, as the pipe is dimensionally more accurate and ready for jointing far quicker after uncoiling than would be the case with pipes of greater ovality.

The new low ovality coils from GPS PE Pipe Systems saves time and provides a potential for greater security in electrofusion jointing.

The current UK specification for PE potable water pipe is BS EN 12201, but this gives no particular requirements for ovality of pipe from coils. The obsolescent WIS 4-32-17 pipe specification required that coiled pipe should have an ovality of less than 12% after uncoiling.

PE Pipes are extruded in straight lengths but the coiling operation at the end of this process will tend to make the pipe more oval than it was originally. After uncoiling, the time to achieve relaxation back to less than the 12% figure has in the past been the cause of some significant frustration for both users and contractors alike.

GPS PE Pipe Systems can now deliver pipe coils in dimensions 125mm to 180mm with an ovality, immediately after uncoiling, of less than 5%. This is a particularly advantage when electrofusion jointing is being used.