The exterior beads formed during a butt fusion process were used for non-destructive testing of the quality of butt-fused HDPE pipe joints. This innovative concept was tested using a dimensionless quality parameter that is based on tensile energy to break (TEB) values obtained from tensile testing of both the bead and joint specimens. The results show an r2 of 0·87 for a linear regression between these two sets of specimens, which supports the hypothesis that the external bead squeezed out of a butt-fused joint can be used to test the quality of the joint itself. Statistical analysis was carried out to determine the effects of other tested parameters. Furthermore, four distinct failure modes have been identified and a quality test protocol using the quality parameter is proposed.
INSTITUTEPLASTICS PIPE: ‘Polyethylene Joining Procedures’, Wayne, NJ, The Society of the Plastics Industry, 1993.
2.
POTENTEH., MICHELP. and TAPPEP.: ‘Joining Plastics in Production’, Abington, UK, Welding Institute, 1988, 105–126.
3.
ASTMD2657–97: ‘Standard practice for heat fusion joining of polyolefin pipe and fittings’, Philadelphia, PA, American Society for Testing and Materials, 1997.
4.
BARBERP. and ATKINSONJ. R.: J. Mat. Sci., 1974, 9, 1456–1466.
BENKREIRAH., DAYA. J. and SHILLITOES.: ‘Proc. Int. Conf. on Advances in Joining Plastics and Composites’, 10–12June1991, Bradford, Yorkshire, UK, TWI, 188–201.
7.
BOWMANJ. A.: Welding Metal Fabrication, 1996, 64, 62–65.
8.
MUNNSI. J. and GEORGIOUG. A.: Insight: Non-Destructive Testing and Condition Monitoring, 1999, 41, 291–303.
9.
COWLEYW. E. and WYLDEL. E.: Chem. Ind., 1978, 3, 371–377.
10.
GIRARDIM. A.: ‘Proc. 8th Int. Conf. on Plastic Pipes’, 21–24September1992, Koningshof, The Netherlands, The Plastics and Rubber Institute, 1992, B2/6-1—B2/6–8.
11.
LuX., QIANN., BROWNN. and BUCZALAG.: J. AppL Polym. Sci., 1992, 46, 1417–1427.
12.
MARSHALLJ. P.: ‘Proc. Int. Conf. on Advances in Joining Plastics and Composites’, 10–12June1991, Bradford, Yorkshire, UK, TWI, 1991, 202–215.
BOWMANJ. A.: ‘Buried Plastic Pipe Technology’, ASTM STP1093, American Society for Testing and Materials, 1990, 101–121.
15.
ZHAOJ. Q. and DAIGLEL.: (2002). ‘Performance of HDPE Sliplined Cast Iron Watermain, Final Report’, NRCC Client Report B-5108.3, Institute for Research in Construction, Ottawa, ONT, Canada, National Research Council Canada, 2002.
16.
BARKERM. B. and BEVISJ. B.: J. Mat. Sci., 1983, 18, 1095–1118.
17.
HINCHCLIFFE A. and TROUGHTONM. J.: ‘Proc. 10th Int. Conf. on Plastics Pipes, 14–17September1998, Göteborg, Sweden, IOM Communications, 1998, 555–564.
KIMATAA., TAKAHASHIK., YASUIM., ARIIA., AIZAWAA. and MASAKIA.: ‘Proc. 10th Plastic Fuel Gas Pipe Symposium’, 27–29October, 1987, New Orleans, LA, American Gas Association, 1987, 127–140.
20.
DECOURCYD. R. and ATKINSONJ. R.: J. Mat. Sci., 1977, 8, 1535–1551.
21.
WIS4-32-08: ‘Specification for site fusion jointing of PE80 and PE100 pipe and fittings’, Water Industry Specification, WRc plc, Bucks, UK, UK Water Industry Engineering and Operations Committee, 1994.
22.
REYNOLDSN D., JENKINSP. W, BURGESSP. and ATTWOODJ.: ‘Proc. 10th Int. Conf. on Plastics Pipes’, 14–17September1998, Göteborg, Sweden, IOM Communications, 1998, 565–576.
23.
FOLKESM. J., HUANTONJ. and BOWMANJ.: ‘Proc. Int. Conf. on Advances in Joining Plastics and Composites’, 10–12June1991, Bradford, Yorkshire, UK, TWI, 118–127.
24.
POTENTEH. and TAPPEP.: Welding World, 1988, 26, 18–25.
25.
ZHAOJ. Q., DAIGLEL. and BEAULIEUD.: Can. J. Civil Eng., 2002, 29, 787–798.
26.
ASTMD 638–99: ‘Standard test method for tensile properties of plastics’, Philadelphia, PA, American Society for Testing and Materials, 1999.
27.
ASTMD 882–97: ‘Standard test method for tensile properties of thin plastic sheeting’, Philadelphia, PA, American Society for Testing and Materials, 1997.
