PolyPipe®
R E C O M M E N D E D
Heat Fusion
Joining Procedures
TABLE OF CONTENTS
| INTRODUCTION | 1 |
| FEDERAL REGULATIONS | 1 |
| QUALIFICATION PROCEDURE | 2 |
| HEAT FUSION | 2 |
| INCLEMENT WEATHER | 3 |
| NOTES ON FUSION CONFIDENCE | 4 |
| FUSION CHECKLIST | 5 |
| BUTT FUSION | 6 |
| PROCEDURE | 6 |
| QUALIFICATION | 10 |
| SADDLE FUSION | 14 |
| DEFINITIONS | 14 |
| PROCEDURE | 15 |
| QUALIFICATION | 17 |
| SOCKET FUSION | 21 |
| EQUIPMENT REQUIREMENTS | 21 |
| HEATER TEMPERATURE | 21 |
| PROCEDURE | 21 |
| QUALIFICATION | 23 |
| APPENDIX A | 27 |
| HYDRAULIC FUSION MACHINE GAUGE PRESSURE | 27 |
| REFERENCES | 28 |
| FIGURES | |
| FIGURE I – BUTT FUSION BENT STRAP TEST SPECIMEN | 10 |
| FIGURE II – SADDLE FUSION BENT STRAP TEST SPECIMEN | 17 |
| FIGURE III – SOCKET FUSION BENT STRAP TEST SPECIMEN | 23 |
| TABLES | |
| TABLE I – BUTT FUSION: APPROXIMATE MELT BEAD SIZE | 7 |
| TABLE II – BUTT FUSION: BEAD WIDTHS PER WALL THICKNESS | 9 |
| TABLE III – BUTT FUSION: TROUBLESHOOTING GUIDE | 13 |
| TABLE IV – SADDLE FUSION: MAXIMUM HEATING/MINIMUM COOLING TIMES | 15 |
| TABLE V – SADDLE FUSION: TROUBLESHOOTING GUIDE | 20 |
| TABLE VI – SOCKET FUSION: TIME CYCLES | 22 |
| TABLE VII – SOCKET FUSION: TROUBLESHOOTING GUIDE | 26 |
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