G-8123. 6.3.2. pipe ends were not aligned and force was needed to install. Other suitable heat fusion joining procedures are available from various sources including pipe and fitting manufacturers. Q UALIFICATION OF P ROCEDURE No special procedures are necessary because a trenchless technique has been used for the installation, rehabilitation or replacement. fusion of polyethylene pipe using AS/NZS 4130 material as a basis. 3. 50%. API-570 AUTHORIZED PIPING INSPECTOR . Pipe systems are one of the most critical applications for thermoplastics materials with a design base of 50 years and expected lifetime in excess of 100 years. Butt fusion It is possible to butt fuse pipes and fittings of different grades and SDR, but this should only be carried out under controlled conditions. Upon request, verify fusion quality by making and testing joints in accordance with manufacturer’s recommended qualification procedure and bent test strap method specified herein. pipe by heat fusion (butt fusion or branch saddle fusion), ... All heat fusion joints must be fabricated in accordance with the fusion procedures outlined in Gas Specification . McElroy's manual machines offer a compact and light-weight solution for butt fusing pipe. Welcome to Teel’s Download Library. Do not twist Pipe or Fitting. 2) Adjust set-up, equipment, operation, and fusion procedure. Electric Fusion Welding (EFW steel pipe) refers to an electron beam welding, the use of high-speed movement of the electron beam directed impact kinetic energy is converted to heat the workpiece so that the workpiece leaving the melt, the formation of the weld.. 13. the specific procedures for the joining of a particular combination of unlike PE piping products. The bar rating of the pipe required should always be stated on the drawings. DriscoPlex 6400 series PE3608 and PE4710 HDPE pipes are the piping materials of choice for service in oil and gas gathering, coal-bed methane, shale methane, and landfill methane recovery, brine supply lines, oilfield water and many other energy /industri; Leak free, when fusion welded; Excellent flow characteristics; UV (ultraviolet) protected 19 May 13 23:24. FM 34819 Certificate No. The fusion-jointing procedures and parameters used in the field can differ from those in this International Standard, depending on the manufacturer's written procedures and/or local standards. Standards for pipes and fittings, joining procedures, testing and equipment are included. PPI TR-41 Generic Saddle Fusion Joining Procedure for Polyethylene Gas Piping 4. PPI TN-42 Recommended Minimum Training Guidelines for PE Butt Fusion Joining Operators for Municipal and Industrial Projects. HDPE Pipe Information. PPI Handbook of Polyethylene Pipe – 2009 (2nd Edition) 2. Performance criteria describe the performance needed to demonstrate achievement of the element. Page 1 of 9 570_BOK_June 2020 . When fused together, HDPE has a zero leak rate because the fusion process creates a monolithic HDPE system. This Bulletin describes recommended pmedures and guidelines for joining Performance Pipe polyethylene pipe and mings using butt fusion, saddle fusion and socket fusion joining techniques. Performance Pipe Socket Fusion Training - YouTube. Our facilities are ISO certified and our skilled technicians are trained on the latest pipe fusion techniques. Summarises the major national, international and UK industry standards which are used for butt fusion, electrofusion and socket fusion welding of polyethylene pipe. Designed to provide a single transition from plain end HDPE pipe (SDR 7 – SDR 26) to grooved steel sized piping system components. GPS PE Products Overview 2-3 Quality and Environmental Standards 4-5 Health and Safety 6 Material Properties & Compatibility 7-9 Pressure Ratings & Flow Characteristics 10-15 Design 16-20 Handling & Storage 21-24 Product Marking 25 Procedures & … Approximately 95% of all gas distribution piping in the United States is polyethylene pipe joined by heat fusion. I couldnt find any reference in ASME standards for; - After welder test, qualified diameters, thickness range. Observe the joining process to determine that the correct procedure is being followed. PP 817-TN-P3 Propane Gas High Pressure 10 psi Inlet Pressure 1psi Drop. Pressure rating meets or exceeds the performance capability of the pipe. Polyethylene gas pipes are the preferred natural gas distri-bution piping product of choice with over 90% usage in North America today. What is pipe fusion?Learn more about the process of socket fusion and the benefits of fused pipe in this video. It also covers the weld procedure for activities such as surface preparation, clamping, alignment and cooling procedures. self-propelled, all terrain fusion machine, and is designed to butt fuse polyethylene pipe. This lesson reviews the basic procedures, necessary equipment, and items to be aware of in the heat fusion process, courtesy of Performance Pipe. 4.2 Place and Time Of Testing. 14. As in any pipeline application, joint quality greatly affects overall operational safety of the system. Pipe” • TR-41, “Generic Saddle Fusion Joining Procedure for Polyethylene Gas Piping” • the 2015 NGA Plastic Pipe Joining Manual, and • the fusion procedures established by our approved manufacturers’ of PE plastic pipe/fittings and heat fusion joining equipment. All pipe produced under this standard must utilize pressure rated materials, but may be used in pressurized, nonpressure and negative pressure applications. The standard method of joining plastic pipe in the field is the butt fusion process. He is currently the managing consultant for Alan Kehr Anti-Corrosion, LLC, and author of the book “Fusion-Bonded Epoxy (FBE): A Foundation for Pipeline Corrosion Protection,” published by … This paper presents the effect of fusion procedure on the fusion performance of the thermal butt fusion in the safety class III buried HDPE piping per various tests performed, including high speed tensile impact, free bend, blunt notched tensile, notched creep, and PENT tests. Remove foreign matter or dirt from inside of the pipe and fittings before fit up. PP 817-TN-P1 Propane Gas Low Pressure Flow. 3/4” – 4" IPS. PPI TN-42 Recommended Minimum Training Guidelines for PE Pipe Butt Fusion saddle fusion procedure (see Appendix A) that can be offered to the industry for use with selected PE piping products. Let's Connect. PP 819-TN Field Bending of PE Pipe. Source: ASTM F2620-13, PPI TR-33 Performance Pipe, a division of Chevron Phillips Chemical Company LP | 5085 W. Park Blvd | Suite 500 | Plano, TX 75093 | Phone: 800-527-0662 | Fax: 972-599-7329 PROCEDURE 1. 16. In case of doubt please contact the pipe and or fitting suppliers. Standard Specifications High … March 1996 PHILLIPS DRISCOPIPE Hazen-Williams Pipe … Only the above PE pipe diameters shall be used. Pipes on either side of the joint should be at least 6” (150 mm) or 15 times the wall thickness in length. CERTIFICATION EXAMINATION . Performance alpscontrols.com See more ››. It provides outstanding performance and is used extensively in Natural Gas Service and Distribution lines. 57%. Centrifugal Pump Performance Test procedure. For PP-R pipe up to 24” and HDPE pipe up to 65,” we can draft and fuse a pipe system based on your required specifications. QUALIFICATION PROCEDURE. This applied force joins the melted surfaces resulting in a permanent, monolithic fusion joint. PolyPipe® fusion procedures require specific tools and equipment for the fusion type and for the sizes of pipe and fittings to be joined. We spoke to fusion-bonded epoxy (FBE) expert, Alan Kehr, about specifying this material.Kehr has 40 years’ experience in the pipeline coatings industry, including R&D and technical service. This Bulletin describes recommended pmedures and guidelines for joining Performance Pipe polyethylene pipe and mings using butt fusion, saddle fusion and socket fusion joining techniques. Fusion and Joining: 7: Liquid Hydrocarbon Permeated Pipe: 8: Butt Fusion: 8: Butt Fusion Procedure: 9: Secure the Components in the Butt Fusion Equipment: 9: Face the Component Ends: 9: Align the Faced Component Ends: 10: Melt the Component Ends: 10: Join, Apply and Hold Fusion Joining Force, Cooling: 11: Visually Inspect Fusion Bead Appearance: 12: Approximate Butt Fusion Joining Rates Electrofusion Similarly different grades and SDR's of pipe can be connected using electrofusion, again only under controlled conditions. Performance Pipe, a division of Chevron Phillips Chemical Company LP, today announced it is now an exclusive distributor of Supraflow™ gas pipe tap tees manufactured by Spain-based Grupo Torre for Canada and most of the U.S. F2620 Maintain fusion pressure against the piping component ends for a minimum of 11 minutes per inch (25.4mm) of pipe wall. This Manual describes procedures and guidelines for joining Performance Pipe products using butt fusion, saddle fusion and socket fusion joining techniques. EFW pipe vs ERW pipe. Performance Pipe produces polyethylene piping products offering performance and innovation in natural gas pipe and fittings, industrial pipe, and many other applications.Get access to special pricing and our full catalog with hundreds of millions of products. This International Standard is intended to enable the effect of site assembly variables on joint performance to be determined. Review paper summarizing years of research on fusion materials. HDPE pipe is strong, durable, flexible and light weight. The loop installer should always consult with the pipe manufacturer for proper fusion procedures. Prepare a sample joint. Unlike the fusion process developed for other plastics pipes, the fusion process for HDPE is proven and has been used by the natural gas industry for over 40 years. Charter Yellow CTS & IPS pipe is made from a medium density PE 2708 resin formulation listed in PPI TR4. 2. Pipeline Welding Procedures. A fitting with implanted metal coils is placed around two ends of pipes to be joined, and current is passed through the coils. Register Now. This is the equivalent of Performance Pipe 8100 and 8300. ... Fitting selection is important to the performance of a piping … CSA B137.4-17 – limited sizes only – see data sheet. Both fused and parent pipe reference specimens are tested and a short-term tensile welding factor, ƒ s, is then determined, defined as: Short-term and long-term mechanical testing to evaluate the effect of flaws in butt fusion joints in polyethylene pipes. performance in even the most aggressive environments, and they are fabricated by methods common to most manufacturers. Chapter 3: Introduction to the different Welding types. This Effects of Hydrocarbon Permeation on Plastic Pipe Strength and Fusion Performance. Electrofusion welding is a form of resistive implant welding used to join pipes. Pipeline operators may consider with Welding Procedure Specifications of the National Certified Pipe Welding Bureau shall conform to the following: Supervision of Testing:Each local chapter shall arrange for and coordinate the testing of the welders employed by its member contractors. @article{osti_888552, title = {Inspection of Fusion Joints in Plastic Pipe}, author = {Reichert, Connie}, abstractNote = {The standard method of joining plastic pipe in the field is the butt fusion process. NOTES ON FUSION CONFIDENCE. In that same vein, if you are fusing pipe – you should be using a fusion standard. If fusing other thermoplastic pipe materials, refer to the pipe manufacturer's fusion procedures or appropriate joining standard. All reasonable care has been taken to ensure the accuracy of the contents of this material; however, Harrington Industrial Plastics… PPI TR-41 Generic Saddle Fusion Joining Procedure for Polyethylene Gas Piping. The plastics pipes industry revolves around specifications and standards for the products and test methods to verify performance. PolyPipe® fusion procedures require specific tools and equipment for the fusion type and for the sizes of pipe and fittings to be joined. Each specific procedure must be acceptable to, and qualified by, the operator having legal responsibility for the performance of the piping system. The setting of test data is done semi-automatically and requires appropriate test experience and accuracy. Standards for pipes and fittings, joining procedures, testing and equipment are included. For more specific fusion information and safety requirements, saddle fusion procedures, socket fusion procedures and Federal regulations, please refer to Performance Pipe Bulletin PP 750 “Heat Fusion Joining Procedures and Qualification Guide.” This procedure … Remove pipes and fittings with defects and replace with acceptable materials. This is based on inserting lack of fusion flaws of known size and particulate contamination flaws of known concentrations into butt fusion joints and determining the effect of these flaws on both the short-term and long-term integrity of the joints. This document is a guide only, and should not be used in place of training by an authorized electrofusion instructor. Butt Fusion Qualifying Procedure 6.3.1. Chemical & Abrasion Resistance of Corrugated Polyethylene Pipe, (1997), TR-35. BODY OF KNOWLEDGE . 1. Removing of test specimens for combination of 2G & 5G NPS 6 (DN 150) or larges pipe should be used to make up the test specimens. We are pleased to provide you with copies of our advertising materials as well as whitepapers and general reference information for your use. McElroy, the leading manufacturer and innovator of pipe fusion equipment, has selected the Getac ZX70 fully rugged tablet, to be incorporated into the company’s DataLogger 6 solution for quality assurance in the field. Summarises the major national, international and UK industry standards which are used for butt fusion, electrofusion and socket fusion welding of polyethylene pipe. This bulletin has been developed to assist those responsible for the butt fusion joining of Performance Pipe products in municipal, industrial, gas and energy applications. 4.1 Testing Personnel. With capital efficiency and productivity as your top priorities, our completions solutions encompass the latest technical innovations, digital capabilities, engineered technologies, and equipment reliability to provide leading-edge performance. The proper application of fusion bond epoxy powder and liquid coatings in the field on a pipeline construction project, either on girth welds or various required repairs, is an essential element to the successful long–term integrity of a pipeline. Figure 5: The pipe end and couplings were not properly Coupling #2 • There were no alignment/stab depth marks visible on the pipe causing the pipe to be severely miss-stabbed (Figure 6). properties; pipe fusion procedures; fusion integrity analyses and testing procedures development; pipe performance requirements; volumetric examination methods and determination of acceptable material flaws applicable to U.S. and international standards and procedures. NACE RP0490 Standard Recommended Practice for Holiday Detection of Fusion- Bonded Epoxy External Coating of … Corrosion is a leading cause of storage tank and piping failures. D. Plastics Pipe Institute, PPI www.plasticpipe.org 1. Lower emissions with grid-powered fracturing. Butt Fusion Figure 5.1 A Standard Butt Fusion Joint The most widely used method for joining individual lengths of polyethylene pipe is by heat fusion of the pipe butt ends as illustrated in Figure 5.1. Technical Note PP 831-TN PE3408 Pipe in Compressed Air or Compressed Gas Service. Since this represents a special situation, it is subject to limitations. Additionally, the equipment should be well maintained and capable of operating to specification. Site butt welding of transmission pipelines Withdrawn with no replacement. PPI TR-33 Generic Butt Fusion Joining Procedure for Polyethylene Gas Pipe 3. The two surfaces are then brought together under controlled pressure for a specific cooling time and a homogeneous fusion joint is formed. These systems often carry and store products including dry gas, wet gas, crude oil with entrained/emulsified water, and processed liquids. HDPE pipe is also a more environmentally sustainable option as it is non-toxic, corrosion- and chemical-resistant, has a long design life, and is ideal for trenchless installation methods because of its flexibility. E 51385 GPS PE PIPE SYSTEMS. Basic Joining Techniques Disclaimer: The data furnished herein is based on years of experience, testing and our vendors engineering information. June and October 2020 (Replaces February 2019) API Authorized Piping Inspectors must have a broad knowledge base relating to maintenance, inspection, alteration and Butt Fusion – This technique consists of heating the squared ends of two pipes, a pipe and fitting, or two fittings by holding them against a heated HEAT FUSION. MDPE is a standard 12 bar rating, and HPPE can be purchased in both 10 and 16 Bar … INTERNATIONAL STANDARDS PIPA recommends the butt fusion procedures and parameters as specified in ISO 21307, Plastics pipes and Fittings – Butt Fusion Jointing Procedures for Polyethylene (PE) Pipes and Fittings Used in Construction of Gas and Water Distributions Systems. USE THESE PROCEDURES WITH THESE PRODUCTS. Proven to be a reliable joining system, an electrofusion joint is heated internally, either by a conductor at the interface of the joint or by a conductive polymer. INCLEMENT WEATHER. The recommended joining procedures for the Central Electrofusion System detailed in this manual have been qualified in … All procedures and guidelines in this document are in alignment with ASTM F2620 Standard Practice for Heat Fusion Joining of Polyethylene Pipe and Fittings . - Qualified materials (I will use HDPE PE 100 SDR 11) A compact design for tight indoor work spaces, the 250 fuses pipe and fittings from 63mm - 250mm (2"- 10”). The procedure would be available for use by pipeline operators who would determine whether the procedure is appropriate for their use with the PE piping products they employ. 4. It contains detailed information about HDPE pipe and specifications, HDPE molded and fabricated fittings, McElroy fusion machines, mechanical connections, accessories and much more - all in an easy-to-read indexed format. performance, high integrity plastic and composite piping systems. Certificate No. He is currently the managing consultant for Alan Kehr Anti-Corrosion, LLC, and author of the book “Fusion-Bonded Epoxy (FBE): A Foundation for Pipeline Corrosion Protection,” published by … shown in figures 6, 7. PP 817-TN-N3 Natural Gas High Pressure 5 psi Inlet Pressure 0.5 psi Drop. PP 817-TN-P2 Propane Gas High Pressure 2 psi Inlet Pressure 1 psi Drop. Generic Butt Fusion Joining Procedure for Polyethylene Gas Pipe, (2005), TR-33. Sizes from 2 – 14″ IPS HDPE to 2 – 14″ IPS grooved steel. Resistive heating of the coils melts small amounts of the pipe and fitting, and upon solidification, a joint is formed. Butt fusion involves the simultaneous heating of the ends of two pipe/fitting components which are to be joined, until a molten state is attained on each contact surface. A typical waisted tensile test specimen is … Prepare and Clean. ISO 21307 specifies three proven butt fusion jointing procedures for pipes and fittings, taking into consideration the materials and components used, the fusion jointing procedure and equipment and the quality assessment of the completed joint. For these reasons, PE pipes have been proven reliable, durable, and have been in use since the 1960’s. procedures for butt fusion joining of PE pipe. Sizes from 63 – 355 mm ISO HDPE to 50 – 350 mm ISO grooved steel. copper nickel butt weld pipe fittings ( elbow , tee , reducer , saddles , end cap) They form an easy copper nickel pipe system after welding. Hold. Performance Pipe Website (Resource) Socket Fusion Procedures (Video - 09:16 minutes) Butt Fusion Procedures (Video - 08:54 minutes) Reading: Fusion Procedures & Qualifications Guide (Optional) (Download .pdf) Fusion Procedures … Integrity Fusion Products, Inc. c. Approved Equal . 1.1 This practice describes procedures for making joints with polyethylene (PE) pipe and fittings by means of heat fusion joining in, but not limited to, a field environment. The technical content of this document provides requirements and guidelines for performance, design, materials inspection, dimensions and tolerances, marking, handling, storing and shipping. We spoke to fusion-bonded epoxy (FBE) expert, Alan Kehr, about specifying this material.Kehr has 40 years’ experience in the pipeline coatings industry, including R&D and technical service. Check all pipes and fittings to be used for joint are free from defects, dents or deformities and are straight. Polyethylene gas pipes are light-weight, non-corrosive, available in coil lengths, and easy to install by heat fusion or mechanical fittings. Downloads: PolyPipe Fusion Manual (8.18) PPI TR-33 Generic Butt Fusion Joining Procedures for Fieled Joining of Polyethylene Pipe. The TracStar® 28 model fuses 2” IPS (63mm) minimum to 8” DIPS (225mm) maximum pipe. As in any pipeline application, joint quality greatly affects overall operational safety of the system. These guidelines are intended only for making heat fusion … PE Pipe Joining Procedures 329 Butt Fusion of PE Pipe Products with Different Wall Thicknesses PE pipes of the same outside diameter but having different specified wall thicknesses, that is, different DR designations, may be butt fused to each other under special conditions. 2708 - YELLOW - CTS & IPS. BS EN 1418: 1998 (R2003) Welding personnel. Butt fusion is a thermofusion process. ASTM D2513. All procedures and guidelines in this video are... What is pipe fusion?Learn more about the process of butt fusion and the benefits of fused pipe in this video. PE pipe should also be laid in block paved areas and around hammerheads. The Supraflow™ gas pipe tees offer utility operators a new solution to streamline how to tap 4- to 18-inch pressurized polyethylene (PE) gas pipe lines with … Performance Pipe. permanent, monolithic fusion joint. 3/4" – 2” CTS. 1.1 This practice describes procedures for making joints with polyethylene (PE) pipe and fittings by means of heat fusion joining in, but not limited to, a field environment. Other suitable heat fusion joining procedures are available from various sources including pipe and fitting manufacturers. Copper-nickel alloys are easy to weld. 3.0 TESTING PROGRAM TO EVALUATE USE OF GENERIC JOINING PROCEDURE WITH POLYETHYLENE GAS PIPING PRODUCTS The Task Group collected and examined a large number of diverse procedures now in use by gas pipeline operators or recommended by pipe producers for specific PE piping products. For the handling of the test beds, only trained personnel is employed. This paper describes an investigation into the effect of insufficient homogenization of pigmented resin in polyethylene (PE) pipes on the integrity of the subsequent butt fusion joints and the development of a test to quantify the amount of windows in the pipe. 217 West 8th Ave West Homestead, … Hold the pipe and socket fitting firmly together until the Table 1cooling time has been met . NACE RP0394 Standard Recommended Practice for Application, Performance and Quality Control of Plant Applied, Fusion-Bonded Epoxy External Pipe Coating. Good morning, I have a question regarding welder qualification (performance records) procedures for HDPE pipe electrofusion butt weld. 1. Testing Procedure Final Sign Off For 1” 17 Shop Bend Test For 3/8” 18-23 Preparation and Testing For 3/8” 24 3/8” Test Plate Fit-up 25-26 Helpful Hints 27 Testing Procedure for 3/8” 28-30 Craftsmanship Expectations for Projects 31 . Performance Pipe — a division of Chevron Phillips Chemical Company LP — is the largest producer of polyethylene piping products in North America, with more than 40 years of proven performance, quality and innovation in natural gas, industrial, municipal, mining, oilfield and utility applications. High Performance Polyethylene (PE) in 110mm, 90mm and 63mm (MDPE) sizes can be laid in 50m coils. McElroy, the leader in thermoplastic pipe fusion, has tackled those concerns in a truly innovative way with the introduction of the new TracStar ® 630i, 900i, and 1200i machines. 2. Butt fusion procedures are consistent with PPI TR-33 Generic Butt Fusion Procedures. Pipe wall thickness < 19 mm and Alternative for Pipe wall thickness 10 mm to < 19 mm for 1G, 2G Two specimens are removed as shown in figure 5, by omitting the specimens in upper-right and lower-left quadrants. Disinfection of Newly Constructed Polyethylene Water Mains, (2001), TR-34. The PolyTest system is supported with procedures to enable detection of all types of flaw that can occur in PE pipe welds, including planar flaws, particulate contamination and cold welds. Select and install the heating and saddle fusion tool according to the pipe and fitting base size. The pipeline operator and every pipe producer retain the option of Performance Pipe c. ISCO Industries, LLC d. Approved Equal Standard: AWWA C906 Body: HDPE Pressure Rated: DR 11 Size: Same as HDPE Pipe B. Electrofusion Flex Restraint Manufacturers: Subject to compliance with requirements, provide products by one of the following: a. Georg Fischer Central Plastics b. This allowed the pipe end to be centered in the fusion zone which negated the performance Part 9: 1999 Welding procedure test for pipeline welding on land and offshore. Page 1 of 9 570_BOK_June 2021 BODY OF KNOWLEDGE API-570 AUTHORIZED PIPING INSPECTOR CERTIFICATION EXAM June 2021 and October 2021 (Replaces October 2020) API Authorized Piping Inspectors must have a broad knowledge base … Nature of Hydrostatic Stress Rupture Curves, (2005), TN … Generic Saddle Fusion Joining Procedure for Polyethylene Gas Piping, (2002), TR-41. TR-33 The fusion force should be held between the pipe ends for approximately 30-90 seconds per inch of pipe diameter or until the surface of the melt bead is cool to the touch. 15. Currently no simple, reliable, cost-effective method exists for assessing the quality of fusion joints in the field. Pipelines and Underground Systems. The equipment used in the process of making heat fused joints must be designed to operate for the selected pipe and fusion procedures. The results showed a significant reduction in fatigue lifetime for butt welds having fractional misalignments greater than 10% of the pipe wall thickness when compared to aligned butt welds. 5.0 Other Acceptable Fusion Procedures It must be recognized that there are many other different procedures and fusion parameters used throughout the world that have been proven to make effective, reliable joints. Fusion standards are the backbone of the fusion process. preparing an electrofusion fitting and pipe for fusion. A versatile machine designed for butt fusion of 63mm to 180mm (2" IPS to 6" DIPS) pipe and fittings. The performance of aligned and controlled misaligned butt welds in 63 and 90mm polyethylene pipe systems was determined under fatigue loading conditions designed to induce brittle failure. Performance Pipe, a division of Chevron Phillips Chemical Company LP | 5085 W. Park Blvd | Suite 500 | Plano, TX 75093 | Phon e: 800-527-0662 | Fax: 972-599-7329 6. In the fabrication of stainless steel products, components, or equipment, manufacturers employ welding as the principal joining method. The testing is done on the test bay of the manufacturer. USE THESE PROCEDURES WITH THESE PRODUCTS. Butt fusion procedures are consistent with PPI TR-33 Generic Butt Fusion Procedures. TWI has developed procedures using mechanical testing to develop flaw acceptance criteria for butt fusion joints in PE pipes. This is the best location for literature on Teel’s products and services. ... revealing the pragmatic procedures ongoing, and limitations of this approach due to the synergistic operational effects on IVC materials; the use of in-situ or surveillance monitoring is outlined as a method to accommodate this limitation in synergistic effects and allow confidence in future DEMO operations. There are numerous products and procedures used by the industry. Pressure testing of plastic pipes, especially PE, is complicated because the pipe material creeps under pressure therefore the pressure reduces without any leakage so results can be misleading. The force applied during the fusion passes through the center of the pipe, producing an equal distribution of force around the diameter of the pipe which results in an even, continuous bead formation and quality joint. Heat fusion can be used to join sections of HDPE pipe, including high-performing PE4710 pipe, while electrofusion is used to add couplings, tapping tees, branch saddles and other fittings. Be sure to check back often, as we update this page and provide more information.
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