MACHINERY | PIPE JOINING
Right: Pinweld’s technology joins pipe by replicating production conditions on a microscopic scale
and procedure testing should be carried out before construction starts. “Furthermore, there should be inspectors
present at construction sites,” said the report. At the same time, members of Insta-Cert – a
Nordic group of certification bodies – should review certification regulations regarding require- ments for ovality and indirect methods for measur- ing residual internal stresses in PE pipes for water and sewage. “To achieve good quality joints in PE pipes,
rotating scraping tools, fixing tools and rounding clamps must be used,” said the report. “Also, trenches must be wide and long enough for fitting equipment and personnel – and for adjusting the positions of the pipe ends.”
Electromagnetic joining UK-based Pinweld has developed a new way to join thermoplastics together, in both pipe and sheet form. The technology has been used to fuse a range
of different materials in thicknesses of 0.7-10mm – without creating a weld bead or the need for additional material at the joint. The company recently won government funding to develop the process, allowing it to expand its research. Pinweld is working with The Welding Institute (TWI), the University of Bath and the Water Research Centre (WRC). The patented technology uses advanced
electromagnetics and machine learning to control precision engineered tips or heads to create a welded joint. In effect, the process creates a joint by replicating the original production conditions
on a microscopic scale, says the company. Joint geometry is currently being explored and tested – and includes successful trials on both flat sheet and pipes of various diameters. The technology has found a natural application in pipe joining, says the company. It can produce a strong, leak-free joint due to its accuracy, compact dimensions and ultra-low Heat Affected Zone (HAZ). The process has a low energy requirement. This, coupled with machine learning and digital control, means that the technology lends itself to self-certi- fying one-pass welding, says Pinweld.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.mcelroy.com �
www.baruffaldi.it �
www.benvic.com �
www.plasticpipe.org �
www.ri.se �
www.pinweld.com
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IMAGE: PINWELD
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