Many years of experience with welding hdpe pipes have shown, the butt and. Each weld should be numbered and records for each weld number kept in a log book or computer file, showing. Such trial welds shall be made at the beginning of each welding period. Experience gained from user contact and welding training of crewmembers showed that. 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. Chapter 9 pe pipe joining procedures plastics pipe institute. 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.
After the pipe has been joined, fill it with water, carefully bleed off any trapped air. Jointing procedures for polyethylene pe pipes and fittings. Hdpe pipes contains a variety of features in the structure and chemical properties due to the technical structure of hdpe pipe. Generic butt fusion joining procedure for field joining of polyethylene pipe. 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. Above procedure taken from ppi technical report tr31. Developing a procedure for welding thermoplastic seawater piping article pdf available in welding journal 9511. Aug 06, 2017 hdpe pipe welding machine hdpe pipe jointing machine butt fusion welding machine duration. Installation method statement of hdpe piping method. 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. Heat exchangers, pressure vessels and fired heaters may be.
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 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. Electrofusion socket coupling friamat fittings are astm f1055 na cut pipe and rough bonding surfaces na na na na nana na na na. The principle of butt fusion is to heat the pipe ends to a designated temperature 200220 c under. This document describes the preparation and welding procedures of the hdpe pipe butt weld, it is to insure that the welded joint will perform. Welding the root pass before beginning to weld the pipe, the procedure should be checked to assure that the correct electrode is being used. The several small indications in the melt zone of the weld are reconcilable to surface features, and do not represent weld defects. Health and safety in welding, wtia technical note no. To perform a proper fusion procedure and ensure a reliable joint, it is. 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. These sheets also indicate the pipe material abbreviations which are used throughout construction in plans and the proposals figure 11. Under each pipe type, the pipe materials that are required areindicated. The seam shall be produced by self propelled wedge welding apparatus.
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. Butt fusion for pressure pipe ritmo plastic welding. 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. Resistive heating of the coils melts small amounts of the pipe and fitting, and upon solidification, a joint is formed. Machine can also weld moulded fittings like bends, tees, wyes y and flange necks up to o160 mm. 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. Prior to actual field welding, the machine technician will run trial welds on fragment pieces of membrane. Extrusion welding is preferred for repairs, patching and installing pipe boots. 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. Hdpe hydrostatic testing usually uses for hdpe water pipelines. Butt fusion is the most important and widely used method of connection. The butt welding process consists of the joining of two components pipes andor fittings of.
Electrofusion welding is a form of resistive implant welding used to join pipes. Hdpe pipe fittings fusion equipment ritmo america llc. Manual butt fusion, using machines where each step requires a manual. Specifying butt welding of polyethylene pipe systems. 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. Pe 100 pipes has some features of its own raw materials, measurable creates some specifications after the pipe manufacturing process.
Hdpe lining worked by aldahham group fusion welding p7,iraq,k. Generic butt fsion joining procedure for field joining of. Piping systems also include injection points, pumps, compressors, valves, filters, tubing and tube fittings, connected mechanical equipment, instrumentation, and pipe support systems 1. The purpose is to make suggestions which can help in the creation of specifications but is not intended to provide a template for specifications. Measurement and numerical simulation article pdf available in journal of pressure vessel technology 1414 april 2019 with 620 reads how we measure reads. This includes the diameter and the classification of the electrode. 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. The butt fusion process is extensively used in the joining of polyethylene. Maximum particle size pipe diameter maximum gravel or stone size more than 600mm 25 mm 5.
Hdpe pipe pe100 pipe technical specification and test methods for piping systems. Welding procedure specification 7100xxxx hdpe 1 932009 922009. Pdf developing a procedure for welding thermoplastic. Specifying butt welding of polyethylene pipe systems plastics. Pipes must be correctly aligned before making connections. Gamma 160 is a manual butt welding machine for hdpe and pp pipes up to o 160 mm. In the infancy of plastic welding, the use of nitrogen proved most successful in preventing material contamination and oxidation. This wps shall be used in conjunction with the general welding standards gws and welding fabrication procedure wfp. 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. Weld temperature and machine speed shall be varied according to ambient conditions in order to maintain and demonstrate a consistent acceptable weld.
Heat exchangers, pressure vessels and fired heaters may be included in a. Sample of pe pipe to drain completely trapped air care should be filled in the test environment. Hdpe butt fusion weld inspection and imaging using evisive. Use a base board or groundsheet to protect against dirt and damp. 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. Where native soil is used as pipe zone backfill, the foll owing. All pipes and fittings can be joined by this welding method. Pop003 references the iso 27 standard plastics pipes and fittings butt fusion. 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. A fitting with implanted metal coils is placed around two ends of pipes to be joined, and current is passed through the coils. When pipe is listed by type, the contractor may use any pipe material that meets the requirements of that type. 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. Guidelines for welding thermoplastic materials hot gas hand.
Welding procedure specification 7100xxxx hdpe 1 932009 922009 7100 hdpe friamat na na astm d3035 astm d3035na na na na 4 0. Ritmo, known world wide, as a leader in the manufacturing of top quality fusion equipment, is now offering fitting machines up to 64. Welding procedure specification 7100xxxxhdpe 1 932009. In some cases, it may be necessary to allow pipe to equalize to the temperature of its surroundings. Gravel is easier to compact than sand and allows the pipe to be installed deeper, if required. Materials that have been prequalified to be joined by this fusion procedure are within the nominal melt index range of 0. Structural welding code steel specification for welding procedure and performance qualification steel water pipe 6 in. Central plastics company recommends that a minimum of.
No this wps shall be used in conjunction with the general welding standards gws and welding fabrication procedure wfp sections. If in doubt, seek advice from the pipe or fitting manufacturer. In hot gas air welding, the heat transfer medium is a heated gas, in general clean air. The speed tip heats the rod and the substrate, while at the same time it presses the molten weld rod into position. 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 bead of softened plastic is laid into the joint, and the parts and weld rod fuse. If specified by the engineer, pressure testing may be conducted prior to pipe installation. Use of lanl welding procedures and welder qualifications for nonlanl. This numbering system will be used on all welding procedure specifications revised or developed in the future. Screwed pipework unless otherwise stated on approved drawing or specifications, pipe threads shall conform to asme b1. Covering bevel setup, tack welding, e6010 open root, e7018 hot pass and cap. 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. Pdf developing a procedure for welding thermoplastic seawater. The most common welding method used today is the joining of hdpe pipe and fittings by butt welding method.
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 welding how to pass a smaw 6g pipe welding certification. Allow pulledin pipes to relax for several hours to recover from tensile stresses. Mar 16, 2009 hdpe lining worked by aldahham group fusion welding p7,iraq,k. Butt fusion for pressure pipe ritmo plastic welding machines. A new standard in hdpe pipe fittings fusion equipment technology ritmo america, profittings fusion machine line. Jointing of hdpe piping smaller diameter hdpe pipes i.
The information in the chart above is for manual butt fusion machines. Check pn and sdr rating marked on fitting and compare with that of the pipe. When joining coiled pipe, making an scurve between pipe coils can relieve tension. 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. Wps data sheets will be added for each type of plastic pipe, i. Gamma 160 features special jaws for manufacturing elbows. Ventilation loosening flanges, or using equipment provided holes. 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. It is also recommended that the metal file type of rasp not be used as a pipe scraper.
Pipe fitting selection check that both pipe s and fitting to be joined are compatible, only compatible materials should be joined together. 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. Butt fusion is the most important and widely used method of connection for hdpe pipes larger than 110 mm. 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. All threading shall be carriedout after bending, forging or heat treatment, but. The technique of butt fusion welding polyethylene pipes is extremely forgiving and. The metal end is available with a bevel for butt welding, with male or.
Geberit licensed manufacturing process produces hdpe with a reversion less. Butt fusion welding of hdpe pipes work procedure a pipeline is as good as its weakest point. The hdpe pipe fittings can be performed in several ways as described below it should be noted that based. Protect the welding area against dirt, humidity and direct sunlight.
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. A good practice guide for the butt fusion jointing of pe. Above is an evisive scan image of a 12 high density ployethylene hdpe thermal butt fusion weld. Procedures for hdpe pipe pressure testing outside the trench. Polyethylene fitting catalogue hdpe fitting cataloge. 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. Pipetap connections, where required, shall be drilled through the pipe wall and be smooth inside. A thermoplastic fusion buttjoint welding procedure and inspection. Butt fusion joining procedure and qualification guide technical. Polyethylene pipelines require various pe fittings according to type of application. 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 scan above was performed using a manual rastertype pipe scanner shown in the previous slide, but. Visual inspection checklist for piping systems revised. Sewing, taping, gluing and solvent welding are not acceptable for field seaming unreinforced geomembranes.
459 1091 163 1432 669 361 1226 735 781 1096 1575 967 32 1206 1468 267 900 252 1202 1260 584 172 1169 1159 1498 886 239 19 291 1112 330 46 1181 89 1316 504 539 1482 1315 1448 819 1366 654