ENHANCEMENT OF BUTT FUSION JOINTS INTEGRETY AGAINST SLOW CRACK GROWTH

Papers # 2012 Barcelona

Butt fusion welding is a method of joining often practiced in structural plastic pipes used in pressure applications, where joint integrity is a strict requirement for design lifetime of fifty or more years. The fusion process encompasses melt flow and rheology as well as diffusion and solidification sciences in which they all work toward in producing a safe and reliable joint. Different joining conditions were prepared to investigate welding property. Among several welding conditions, this paper focuses on the effect of pressure and temperature of welding process to slow crack growth. From short term test, it was revealed that welding pressure and temperature exert considerable effect to the joint strength. Besides short term test we designed and conducted long term integrity tests, and these experiments will reveal more profound effect of welding conditions.

Please note that the whole article content is available on PPCA website onlySource : 2012 Barcelona


Related papers

ISO 13477 S4 TESTING OF AWWA C900 PVC PIPE

Author(s) : Sunwoong Choi, Tom Marti 2016 Berlin

Small scale, steady state (S4) testing per ISO 13477 is a lab-based procedure to determine the critical pressure at which a fracture will propagate following initiation in a given pipe material filled with a given test medium. The S4 test was originally developed for the natural gas industry using air as the test...

Utilization of Notched Ring Test for larger diameter pipes and fittings

Author(s) : Sooho Pyo, Junghyun Nam, Yoonsang Kim and Sunwoong Choi 2010 Vancouver

The Notched Ring Test (NRT) has been recently developed to measure slow crack growth (SCG) in plastics pipes and fittings. The NRT specimen in the form of a notched full ring is directly obtained from the extruded pipe or injection molded fitting and has demonstrated its effectiveness in generating slow crack growth...

Members of the Association

BOREALISBOROUGEINEOS O&PIRPCKorea Petrochemical IND. Co., LTDLyondellBasellPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE
TOP