Butt fusion cooling times, speeding up the process
Papers # 2010 Vancouver
The polyethylene (PE) pipe system has many attributes that make it the most reliable and
highest quality system within the prescribed pressure and temperature limitations. However,
the process itself is the weakest link in the PE pipe sales chain. While easier to join in large
diameters, it can require the most time to install. Long cooling times can make it more
difficult to sell a PE system. With the introduction of ISO 21307, there was a new answer to
this problem for the rest of the world. The rest of the world because the USA and some other
countries have been using this procedure for may years. Using the higher interfacial
pressures proved to speed up the cooling time so that a strong safe joint can be removed the
machine without taking any undue risk in weld failure in the near or long term. Now there is
an amendment to ISO 21307 in he works with a revision to follow. The question is, can
cooling times be shortened without compromising joint quality. We review testing of fusion
jointing done using various Standards and correlate cooling times recommended with actual
joint temperature at the completion of time in the machine under pressure. We can then
determine if current standards have adequate cooling times or wasting valuable time
Please note that the whole article content is available on PPCA website only
For decades, energy companies have used thermoplastic liners to protect pipelines from internal corrosion and abrasion. Liner systems can be a simple and cost effective means to extend the life of an asset and protect the environment. Many advances in technology have occurred over the years and thermoplastic liners...
This author presented the thought provoking paper “Butt Fusion Cooling Times, Speeding Up the Process” at Plastic Pipes XV held in Vancouver, British Columbia, Canada.. That presentation discussed testing of heavy walled pipe using various fusion standards and the resulting cooling times with relative joint strength....
In the early days of polyethylene piping use, there was no forum, such as the Plastics Pipe
Conference, where information could be disseminated and technical experience exchanged.
Thus, each piping community, whether a pipe manufacturer, gas or water company, or
technical body, developed their own philosophies and...
The Gas Research Institute and McElroy Manufacturing, Inc. cofunded Project 5091-271-2341 to increase the capability of the UltraMc” Computerized Ultrasonic Inspection System. This project added the 2” Iron Pipe Size (IPS), 3” IPS, 6” IPS, 8” IPS, 10” IPS, 12”, IPS, 50 mm Japan Industrial Size (JIS), 75 mm JIS, 100 mm...