Our site uses cookies necessary for its proper functioning. To improve your experience, other cookies may be used: you can choose to disable them. This can be changed at any time via the Cookies link at the bottom of the page.


The Inspection of Cold Welds in Electrofusion Joints

 

Joining

Plastic Pipes Conference Association # 2006 Washington DC

Bird, Caravaca, Raude

Electrofusion joints for polyethylene pipe are one of the common joining methods used in the water and gas industries for distribution pipelines. Common problems in manufacture of these joints are contamination, lack of fusion, lack of penetration and insufficient heat applied to the joint. The latter flaws can result in a joint that, although apparently fused, does not have the same mechanical properties as a properly prepared joint. This paper presents ultrasonic and thermal techniques for detecting and monitoring flaws in the weld. For post welding application a phased array ultrasonic technique is described that indicates flaws at the weld joint and the size of the heat affected zone as a record of the applied heat. Results of laboratory experiments on sample pipes are described, and prototype systems for application of the techniques to site work are also shown.

Please note that the whole article content is available on PPCA website only :

Related papers

2006 Washington DC : PVC Pipe Jointing The Rieber System in North America

Author(s) : Rahman, Bird

The jointing of municipal Polyvinyl Chloride (PVC) pipelines in North America and in many countries around the world is achieved by means of a rubber sealing ring seated in the pipe bell to effectively prevent leakage between two adjoining pieces of pipe after the spigot (male end) is inserted into the bell (female...

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationHanwha TotalEnergiesINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellORLEN UnipetrolPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE