Welding procedure specification 7100xxxx hdpe 1 932009 922009. Welding the root pass before beginning to weld the pipe, the procedure should be checked to assure that the correct electrode is being used. Visual inspection checklist for piping systems revised. Polyethylene fitting catalogue hdpe fitting cataloge. The speed tip heats the rod and the substrate, while at the same time it presses the molten weld rod into position. Hdpe lining worked by aldahham group fusion welding p7,iraq,k. Machine can also weld moulded fittings like bends, tees, wyes y and flange necks up to o160 mm. Extrusion welding is preferred for repairs, patching and installing pipe boots.
Sample of pe pipe to drain completely trapped air care should be filled in the test environment. This includes the diameter and the classification of the electrode. 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. Hdpe pipe hdpe 100 pipes and polyethylene piping systems. The highest point in the test sample when filling ventilation may be necessary to clear the air pockets. Many years of experience with welding hdpe pipes have shown, the butt and. Hdpe raw materials are contains divided carbon black and 2 percent to 3 percent, this carbon black amount of hdpe piping sytems must be 22,5% according to en 122012 polyethylene piping standard. Where native soil is used as pipe zone backfill, the foll owing. Pdf developing a procedure for welding thermoplastic seawater. Electrofusion socket coupling friamat fittings are astm f1055 na cut pipe and rough bonding surfaces na na na na nana na na na. 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. Allow pulledin pipes to relax for several hours to recover from tensile stresses.
The butt welding process consists of the joining of two components pipes andor fittings of. Pop003 references the iso 27 standard plastics pipes and fittings butt fusion. Proper engineering design of a system will take into consideration the type and effectiveness of the techniques used to join the piping components and. Pipe fitting selection check that both pipe s and fitting to be joined are compatible, only compatible materials should be joined together. Pipe welding and everything you need to know how to stick weld pipe to pass a 6g open root pipe welding certification. Geberit licensed manufacturing process produces hdpe with a reversion less. The most widely used method for joining individual lengths of pe pipe and pipe to pe fittings is by heat fusion of the pipe butt ends as illustrated in figure 1. Central plastics company recommends that a minimum of. 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. This numbering system will be used on all welding procedure specifications revised or developed in the future. The several small indications in the melt zone of the weld are reconcilable to surface features, and do not represent weld defects. In hot gas air welding, the heat transfer medium is a heated gas, in general clean air.
If in doubt, seek advice from the pipe or fitting manufacturer. 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. Welding procedure specification 7100xxxx hdpe 1 932009 922009 7100 hdpe friamat na na astm d3035 astm d3035na na na na 4 0. No this wps shall be used in conjunction with the general welding standards gws and welding fabrication procedure wfp sections. Mar 16, 2009 hdpe lining worked by aldahham group fusion welding p7,iraq,k. Use of lanl welding procedures and welder qualifications for nonlanl. Measurement and numerical simulation article pdf available in journal of pressure vessel technology 1414 april 2019 with 620 reads how we measure reads. A bead of softened plastic is laid into the joint, and the parts and weld rod fuse.
Pipe welding how to pass a smaw 6g pipe welding certification. A new standard in hdpe pipe fittings fusion equipment technology ritmo america, profittings fusion machine line. Hdpe pipe pe100 pipe technical specification and test methods for piping systems. Heat exchangers, pressure vessels and fired heaters may be included in a. Above is an evisive scan image of a 12 high density ployethylene hdpe thermal butt fusion weld. Pe 100 pipes has some features of its own raw materials, measurable creates some specifications after the pipe manufacturing process. Pipes must be correctly aligned before making connections. Weld temperature and machine speed shall be varied according to ambient conditions in order to maintain and demonstrate a consistent acceptable weld. Electrofusion welding is a form of resistive implant welding used to join pipes. Such trial welds shall be made at the beginning of each welding period. Developing a procedure for welding thermoplastic seawater piping article pdf available in welding journal 9511. Hdpe butt fusion weld inspection and imaging using evisive.
Jointing procedures for polyethylene pe pipes and fittings. Specifying butt welding of polyethylene pipe systems. Procedures for hdpe pipe pressure testing outside the trench. Butt fusion for pressure pipe ritmo plastic welding. Polyethylene pipelines require various pe fittings according to type of application. Each weld should be numbered and records for each weld number kept in a log book or computer file, showing. Butt fusion joining procedure and qualification guide technical. Pipe pile welding procedure wps 3 31 thru 33 concrete girder sole plate welding procedure wps 4 41 thru 42 steel girder sip angle welding procedure wps 5 51 thru 52 concrete girder sip angle welding procedure wps 6 61 thru 62 stud welding procedure wps 7 71 thru 72 fillet weld certification welding procedure wps 8 81 thru 82.
Hdpe hydrostatic testing usually uses for hdpe water pipelines. Resistive heating of the coils melts small amounts of the pipe and fitting, and upon solidification, a joint is formed. Protect the welding area against dirt, humidity and direct sunlight. Gamma 160 features special jaws for manufacturing elbows. Jun 03, 2011 with speed welding, the plastic welder, similar to a soldering iron in appearance and wattage, is fitted with a feed tube for the plastic weld rod. Backgroundthe new ncpwb welding procedure specification numbering system clearly defines the type of metals to be welded, the welding process used and allows for identification of variations in a process. Welding procedure specification 7100xxxxhdpe 1 932009. Hdpe pipes contains a variety of features in the structure and chemical properties due to the technical structure of hdpe pipe. Chapter 9 pe pipe joining procedures plastics pipe institute.
The butt fusion process is extensively used in the joining of polyethylene. Generic butt fusion joining procedure for field joining of polyethylene pipe. With detailed accurate information and pictures of the electrode angles, machine setup, pipe welding techniques, and the entire welding certification from start to finish. The joining method is connect the ends of pipes to be welded by using butt welding machine and both ends are pushed toward each other by pressing under a certain temperature. Check pn and sdr rating marked on fitting and compare with that of the pipe. The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems. When joining coiled pipe, making an scurve between pipe coils can relieve tension. The metal end is available with a bevel for butt welding, with male or. In the infancy of plastic welding, the use of nitrogen proved most successful in preventing material contamination and oxidation. Screwed pipework unless otherwise stated on approved drawing or specifications, pipe threads shall conform to asme b1. This document describes the preparation and welding procedures of the hdpe pipe butt weld, it is to insure that the welded joint will perform. Butt fusion is the most important and widely used method of connection.
Above procedure taken from ppi technical report tr31. In some cases, it may be necessary to allow pipe to equalize to the temperature of its surroundings. With todays material quality and equipment technology, nitrogen is becoming more and more a relic of the past. Hdpe pipe fittings fusion equipment ritmo america llc. When pipe is listed by type, the contractor may use any pipe material that meets the requirements of that type. 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. Pipetap connections, where required, shall be drilled through the pipe wall and be smooth inside. 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. Prior to actual field welding, the machine technician will run trial welds on fragment pieces of membrane. Under each pipe type, the pipe materials that are required areindicated. The apparatus shall be equipped with gauges to monitor weld temperature.
Carbon black is the most effective additives for the improving the disintegration speciality of the pe pipes. Experience gained from user contact and welding training of crewmembers showed that. The scan above was performed using a manual rastertype pipe scanner shown in the previous slide, but. Gamma 160 is a manual butt welding machine for hdpe and pp pipes up to o 160 mm. These sheets also indicate the pipe material abbreviations which are used throughout construction in plans and the proposals figure 11. Health and safety in welding, wtia technical note no. Pdf developing a procedure for welding thermoplastic. Jointing of hdpe piping smaller diameter hdpe pipes i.
This wps shall be used in conjunction with the general welding standards gws and welding fabrication procedure wfp. The principle of butt fusion is to heat the pipe ends to a designated temperature 200220 c under. Pipe pile welding procedurewps 3 31 thru 34 concrete girder sole plate welding procedure wps 4 41 thru 43 steel girder sip angle welding procedure wps 5 51 thru 53 concrete girder sip angle welding procedure wps 6 61 thru 63 stud welding procedure wps 7 71 thru 73 fillet weld certification welding procedure wps 8 81 thru 83. A fitting with implanted metal coils is placed around two ends of pipes to be joined, and current is passed through the coils. Heat exchangers, pressure vessels and fired heaters may be. Materials that have been prequalified to be joined by this fusion procedure are within the nominal melt index range of 0. It is also recommended that the metal file type of rasp not be used as a pipe scraper. Pipe pile welding procedurewps 3 31 thru 33 concrete girder sole plate welding procedure wps 4 41 thru 42 steel girder sip angle welding procedure wps 5 51 thru 52 concrete girder sip angle welding procedure wps 6 61 thru 62 stud welding procedure wps 7 71 thru 72 fillet weld certification welding procedure wps 8 81 thru 82. All pipes and fittings can be joined by this welding method. Ritmo, known world wide, as a leader in the manufacturing of top quality fusion equipment, is now offering fitting machines up to 64. The hdpe pipe fittings can be performed in several ways as described below it should be noted that based on the type of the fittings included in the specifications of the design one should do pipe fittings in different parts of the plan. Pipe pile welding procedure wps 3 31 thru 34 concrete girder sole plate welding procedure wps 4 41 thru 43 steel girder sip angle welding procedure wps 5 51 thru 53 concrete girder sip angle welding procedure wps 6 61 thru 63 stud welding procedure wps 7 71 thru 73 fillet weld certification welding procedure wps 8 81 thru 83. The information in the chart above is for manual butt fusion machines. Sewing, taping, gluing and solvent welding are not acceptable for field seaming unreinforced geomembranes.
A thermoplastic fusion buttjoint welding procedure and inspection. Now makes it possible to manufacture tees wyes crosses and elbows with strict factory standards never before possible. This code applies to all workplaces covered by the whs act where welding is carried out and where welding products and equipment are used and stored. Aug 06, 2017 hdpe pipe welding machine hdpe pipe jointing machine butt fusion welding machine duration. The most common welding method used today is the joining of hdpe pipe and fittings by butt welding method. After the pipe has been joined, fill it with water, carefully bleed off any trapped air. Manual butt fusion, using machines where each step requires a manual. Pe pipe joining procedures 327 chapter 9 pe pipe joining procedures introduction an integral part of any pipe system is the method used to join the system components. Structural welding code steel specification for welding procedure and performance qualification steel water pipe 6 in. 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.
This wps shall be used in conjunction with the general welding standards gws and welding fabrication procedure wfp sections and criteria for joint details, repairs, nde, inspection, etc. The purpose is to make suggestions which can help in the creation of specifications but is not intended to provide a template for specifications. Covering bevel setup, tack welding, e6010 open root, e7018 hot pass and cap. Specifying butt welding of polyethylene pipe systems june 2009 this document provides assistance to those involved in preparing specifications for the butt welding of pe pressure pipe systems. The most common are fusion welding and extrusion filet welding. Depending on the pipe size, a half round file can be used to remove any burrs created when the land is ground on to the end of the pipe. Piping systems also include injection points, pumps, compressors, valves, filters, tubing and tube fittings, connected mechanical equipment, instrumentation, and pipe support systems 1. To perform a proper fusion procedure and ensure a reliable joint, it is. Ventilation loosening flanges, or using equipment provided holes. The technique of butt fusion welding polyethylene pipes is extremely forgiving and. Gravel is easier to compact than sand and allows the pipe to be installed deeper, if required. Butt fusion welding of hdpe pipes work procedure a pipeline is as good as its weakest point.
All threading shall be carriedout after bending, forging or heat treatment, but. The hdpe pipe fittings can be performed in several ways as described below it should be noted that based. Use a base board or groundsheet to protect against dirt and damp. Generic butt fsion joining procedure for field joining of. The pipe lengths shall be cut according to the approved shop drawing, and shall be joined using butt fusion welding and electrofusion welding as applicable. Wps data sheets will be added for each type of plastic pipe, i. Maximum particle size pipe diameter maximum gravel or stone size more than 600mm 25 mm 5. If specified by the engineer, pressure testing may be conducted prior to pipe installation. Installation method statement of hdpe piping method. The seam shall be produced by self propelled wedge welding apparatus. 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. A good practice guide for the butt fusion jointing of pe. Guidelines for welding thermoplastic materials hot gas hand. Specifying butt welding of polyethylene pipe systems plastics.
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