Materials that have been prequalified to be joined by this fusion procedure are within the nominal melt index range of 0. Extrusion welding or hot air welding is not recommended for pressure applications. Welding procedure specification 7100xxxx hdpe 1 932009 922009 7100 hdpe friamat na na astm d3035 astm d3035na na na na 4 0. Measurement and numerical simulation article pdf available in journal of pressure vessel technology 1414. Iii hot gas air extrusion welding 1 general 2 equipment and procedure 3 visual check of the final weld iv testing v temperature recommendations. Procedure for performing hot taps suny polytechnic institute. As you hold the rod in place, sweep the nozzle back and forth 3 or 4 times to melt it.
Useful links for hdpe pipe installers acutech piping. It is a method of jointing pipe ends by way of heating and cooling under pressure, resulting in pipe joints as strong as the pipe itself. Post weld equipment and material preservation and protection. Permanent field installations should be done only by operators who have been properly trained and certified as qualified. We have machinery to do butt welding from 63mm to 630mm, electro fusion welding up to mm, extrusion welding to weld sheets of hdpe, pp, pvc and any other related products. Industrial piping systems feature a unique set of challenges compared to residential or commercial piping systems. Industrial requirements are more demanding due to the critical nature of the system. To insure proper bonding, it is essential that filler rods be made with the same high grade resins used in the material being welded. An integral part of any pipe system is the method used to join the system components. In the case of pvc, due to its narrow processing window, the extruder needs to be purged using pp or pe weld rod, to ensure that no pvc material is left to degrade in the barrel. Hdpe may also be joined to other materials by means of compression fittings, flanges, or other types of manufactured transition fittings for example fusion by. Use of lanl welding procedures and welder qualifications for nonlanl work shall be at the sole risk and responsibility of. Be confident that your welding procedure specification will produce a welded component with properties that satisfy the design requirements.
Hdpe and pp materials with flame retardants and electro conductive particles carbon black are considered as inactive regarding toxicological and dermatological aspects, thus harmless. The following information is intended to assist our customers with current standards and regulations. Shop pipe fusion products in addition to our online inventory of plumbing and hvac essentials, your local ferguson is your source for largescale products and commercial material. The several small indications in the melt zone of the weld are reconcilable to surface features, and do not represent weld defects. It provides acceptance criteria for nominated weld features. Internal beads may be removed from pipes after each fusion with a cutter fitted to a long pole. Method statement for installation of hdpe pipes written by. Polyethylene joining procedures butt fusion joining procedure for field joining of polyethylene pipe. Chemical media, temperature and pressure all are vital factors when. A thermoplastic fusion buttjoint welding procedure and inspection procedures were prepared for welding 355 mm od, 27 mm thick hdpe pipelines. Butt fusion for pressure pipe ritmo plastic welding. This wps shall be used in conjunction with the general welding standards gws and welding fabrication procedure wfp.
The butt welding process consists of the joining of two components pipes andor. Dvs 22071, welding of thermoplastics heated tool welding of pipes, pipeline components and sheets made of pehd 2 nen 7200, kunststofleidingen voor het transport van gas, drinkwater en afvalwater stuiklassen van buizen en hulpstukken van pe 63, pe 80 en pe 100. The most important element to successful thermoplastic welding is the filler rod. Summary and conclusions fusion wedge welding is an attractive welding procedure for hdpe geomembranes.
Canadian regulations when used to join uponor infra polyethylene gas pipe and fittings, uponor infra fusion joining procedures are qualified in accordance with canadian standards association regulations. See the procedure for removal of bad seams in section 10. Welding the root pass before beginning to weld the pipe, the procedure should be checked to assure that the correct electrode is being used. Hdpe can produce static electricity that could be dangerous in an explosive environment. As we all know, south africa has a unique economic climate which demands more commitment from companies who wishes to unlock this great potential that awaits each and.
The scan above was performed using a manual rastertype pipe scanner shown in the previous slide, but. Welding procedure specification 7100xxxxhdpe 1 932009 922009 7100hdpe friamat na na astm d3035 astm d3035na na na na 4 0. Hdpe may be joined by mechanical fittings, but may not be buried. In addition, this procedure does not purport to address all of the safety concerns, if any, associated with its use. Guidelines for welding thermoplastic materials hot gas.
Electrofusion installation procedure manual it is important to read and understand all instructions before attempting a fusion. Pop003 contains information regarding welding parameters. Manual pp750 december 2012 december 2012 supersedes. Gamma 160 features special jaws for manufacturing elbows. When fusing the loose ends together, the pit bull may be contorted in different angles to get the pipe to fit correctly. Resistive heating of the coils melts small amounts of the pipe and fitting, and upon solidification, a joint is formed. Installation method statement of hdpe piping method.
Assessment of polyethylene welds 1 introduction this guideline discusses the existing techniques for nondestructive ndt and destructive testing of electrofusion ef and butt welding options for jointing polyethylene pe pipe systems. Since the fusion must be completely cooled before bead removal, assembly time is increased slightly. Fit the appropriate welding nozzle for the selected welding rod to the bak rion hot air tool. Since our foundation in the year 1997, we, polymold products are engaged in manufacturing, importing and exporting of hdpe pipe welding machines, hdpe pipe jointing heater, hdpe butt fusion fittings, ppr welding machine, hdpe flange, hdpe pipe and many more. Scope of work the scope of this method statement is to define all the procedures and inspections to be followed during installation of hdpe pipes at various locations and systems at king abdullah petroleum studies and research centre project kapsarc in. Butt fusion joining procedure and qualification guide. Pe pipe joining procedures 330 it is uncommon to remove internal beads, as they have little or no effect on flow, and removal is timeconsuming.
This is available from the technical guidelines page in pdf format. With our qualification of welders and welding procedures you can be sure you employ welders whose skills are verified and can follow the instructions in a given welding procedure specification. The butt welding method is the most common welding method currently used for joining hdpe pipes and fittings. Accordingly it is not only important that quality pipes and components are used in a piping system, but also the methodology used to join the pipes and other components. Electrofusion is a simple method of joining pe pipes in circumstances where butt fusion is not practicable, such as where valves, elbows, and tees must be added. Extrusion welding has historically been used to weld mainly pp and hdpe, although some modern types of extruders have also been engineered to weld pvc and pvdf.
Welding procedure specification wps may be generated by an authorized person i. The information in the chart above is for manual butt fusion machines. This document describes the preparation and welding procedures of the hdpe pipe butt weld, it is to insure that the welded joint will perform. During the heating of materials for example, during the welding process according to the dvs guidelines no harmful fumes develop. A fitting with implanted metal coils is placed around two ends of pipes to be joined, and current is passed through the coils. Generic butt fusion joining procedure for field joining of polyethylene pipe. Specifying butt welding of polyethylene pipe systems. Butt fusion welding of hdpe pipes work procedure a pipeline is as good as its weakest point. Set the welding temperature on the rotary control according to the welding rod material to be employed in the test see table in main welding section. Grinding is not neces sary, eliminating one undesirable step in the welding process. Proper engineering design of a system will take into consideration the type and effectiveness of the techniques used to join the piping components and appurtenances, as well as the durability.
Hdpe welding rods are available from professional plastics in both coils and straight lengths. Prefabricated fittings are used, incorporating an electrical heating coil which melts the plastic of both the fitting and the pipe, causing them to fuse together. Hot wedge fusion welding of hdpe geomembranes sciencedirect. For hdpe electrofusion welding, hdpe accessories are provided with spigot ends. It is the responsibility of the user of this procedure to establish any and all appropriate safety and health practices and to determine the applicability of regulatory requirements prior to use. Procedure for performing hot taps cfm00015 r2 printed copies are considered uncontrolled. Butt fusion joining procedure and qualification guide technical. Hdpe fusion procedures august, 2010 roth 6 introduction hdpe pipe or fittings are joined to each other by heat fusion.
Dcn1441 cnse confidential page 6of 12 should a problem arise with the tapping procedure, include a specific plan to seal off the tap and isolate it in a manner which maintains the integrity of the system being tapped. One of the benefits of welding hdpe plastics in smaller applications such as you might find in home plumbing systems is that no weld filler rod is necessary. Welding hdpe, or highdensity polyethylene, is a normal procedure for joining lengths of pipe together, whether it be for industrial or home use. Like polyfusion and electrofusion, with butt fusion welding there is no additional. Stateoftheart welding equipment for purchase or rental. Generic butt fsion joining procedure for field joining of. Intelligent welder series iws are plc based hydraulic hdpe pipe jointing machine hdpe pipe welding machine butt fusion. If the second set of specimens fails, the welding procedure shall not be accepted until the deficiencies are corrected and a passing seam is achieved. Proline industrial piping systems asahi america inc.
Hdpe butt fusion weld inspection and imaging using evisive. Then, position the welding rod at a 45degree angle from the opposite side. It allows for an automated procedure that eliminates problems associated with more manual methods. This includes the diameter and the classification of the electrode. Swing the welding gun back and forth if youre doing a pendulum weld. Developing a procedure for welding thermoplastic seawater piping article pdf available in welding journal 9511. Butt fusion is the most important and widely used method of connection for hdpe. The pipe joining method is a process in which the two ends of the pipes to be heated and welded by using a butt welding machine and the both ends are pushed toward each other by pressure under a certain temperature. Hdpe fusion procedures august, 2010 roth 4 overview pipe fusion is necessarily performed outdoors in order to join the ground loop piping in the header trench. As long as the two ends are flush together before a hot plate is added and the ends are stuck together, the weld should come out perfectly fine.
Pdf developing a procedure for welding thermoplastic. The welding consumable should be selected to correctly match or overmatch the strength of the pipe. Explore our ppr and hdpe pipe fusion training capabilities and see what makes ferguson an industryleading provider of pipe fusion solutions. Butt welding parameters the butt welding method to be used on the pipeline is specified so that the contractor can consider the equipment required and the competency of the operators with that method. Prepare the surfaces of the pipe and fitting in accordance with the recommended procedures 5. Manual pp750 september 2017 page 1 of 29 september 2017 supersedes all previous editions performance pipe, a division of chevron phillips chemical company lp 5085 w. Electrofusion welding is a form of resistive implant welding used to join pipes.
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