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Electrofusion Welding

weldingAlfaTest CSG offers a diverse range of electro fusion mechanical testing services including ISO 13954 Peel Decohesion Testing ISO 13955 Crush Testing ISO 13956 Decohesion testing of Saddle fusion joints.

ISO13954 – Peel decohesion testing of electrofusion welded pipes – sizes 90mm and above

Plastics pipes and fittings - peel decohesion test for polyethylene (PE) electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm.

ISO 13954 describes a peel test for determining the decohesive resistance of polyethylene (PE) electrofusion socket assemblies. The sample is subjected to tensile stress, which cause progressive separation of the fused interface. The decohesive strength of the assembly is characterized by the nature of the failure in the pipe and coupling. A qualitative assessment of the weld strength can be carried out from the type of failure observed during the tensile test. A good weld, failure is characterised by material stretched in a “pasty” form or filament formation and is referred to as a ductile failure. Brittle failure (or a mix of both brittle and ductile failure) is characterised by smooth, non-stretched surface with very little drawing of the material and failure occurs at a much lower load.

Sample Images

Left: Ductile failure
Right: Brittle failure of a sample with surface contamination

 

ISO13955 – Crush decohesion testing of electrofusion welded pipe – sizes 16mm to 225mm

An alternative test for EF joints instead of ISO 13954.
This method is applicable to assemblies with pipes or nominal outside diameter between 16mm and 225mm. In this test the specimen is clamped horizontally and the pipe stub subjected to a compressive load in a vertical axis and separated using a lever, the ductility of the fracture surface is then assessed.

 

 

ISO13956 – Decohesion test of polyethylene saddle fusion joint

A test method for the evaluation of the ductility of the fusion joint interface of assemblies of polyethylene pipe and electro fusion or heated tool saddles. 

A Load is applied to saddle of an assembly until failure occurs. The ductility of the joint interface is characterised by the appearance of the failure in the fusion plane and by the determination of the percentage of decohesion. 

 

Get in touch

For more information about electrofusion welding services
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For enquiries please complete a Client Enquiry / Test RequestPoly Pipe Electro Fusion Test Request or Poly Pipe Butt Tensile Test Request form and submit online or download a digital PDF version to complete and submit via email:

CLIENT ENQUIRY TEST REQUEST FORM | PDF DOWNLOAD

POLY PIPE ELECTRO FUSION TEST REQUEST FORM | PDF DOWNLOAD

POLY PIPE BUTT TENSILE TEST REQUEST FORM | PDF DOWNLOAD

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AlfaTest: Brisbane  Telephone: 07 37153400
AlfaTest CSG: Wallumbilla  Telephone: 07 4623 4731
Office: Lot 1 Swans Road WALLUMBILLA Qld 4428
After hours and weekends: 0488 775 684 
Chris Branton
Postal: Unit 3 / 121 Evans Road SALISBURY Qld 4107
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