mechanical joint vs restrained joint

The objective of the design is to distribute the thrust forces to the soil structure in such a manner that damage does not occur to the restrained pipe system and joint separation does not occur in unrestrained joints. Up to four times fewer bolts to tighten. Found inside – Page 23Hydrant fittings may have special restrained joints . ... a retainer gland is inserted on the spigot and bolted to the mechanical joint bell . Most pipe manufacturers have detailed written procedures to follow. TR Flex® connections are not recommended for vertical applications as gravity may not allow the joint to remain in tension which is important, as previously explained. Since 1964, EBAA has been a proud privately-held and family-owned N. American based company currently Headquartered in Eastland, TX. Found inside – Page 130An advantage of many of the restrained joints is that they can be disassembled for removal or repair. 9.4.4 Mechanical Joints There are numerous mechanical ... PVC. - NEW! As a contractor or engineer, you should always consider what is the best product for the application. Implements a series of individually activated wedges into the mechanical joint follower gland, when the wedge segment is engaged by the actuating bolt, the primary contact edges of each wedge segment lock onto the pipe wall, this action causes the primary contact edges to grip the pipe and effectively restrain all classifications of ductile iron pipe From design to installation, we take great pride in providing education and assistance to water professionals throughout the water industry. There are many past threads on such subject that can be searched e.g. Anyone that has attempted to maneuver a 36” retainer gland while in a trench when it is 33 degrees, rainy, and cold could greatly appreciate just sliding a few TR Flex® locking segments into place. This saves time required to install the material. Mechanical Joint Sleeves. Barracuda® RJ gaskets are molded in SAFETY ORANGE in EPDM, SBR and Nitrile. Northwest Pipe welded joints are available for all pipe diameters. Potential for corrosion is thus reduced by eliminating bolts and/or dissimilar metals. Slide the BLACK TUF Grip onto the pipe to be restrained. in the pipeline. EBAA mechanical joint restraint products utilize accepted assembly procedures to seal the joint, then the simple tightening of wedges to restrain the joint. Found inside – Page 196A variety of joints are available for use with ductile iron pipe : 1. ... Restrained Joint - A special type of push - on or mechanical joint designed to ... 839.4 CONSTRUCTION: Suitable anchorage/thrust blocking or joint restraint shall be provided at all of the following main locations: dead ends, plugs, caps, tees, crosses, valves, and bends, in accordance with the Standard Drawings DD-839 Drawing Series. Our sales team strives to exceed customer expectations every day. mechanical joint to make changes or adjustments is simple and straightforward. Toggle Navigation. Need Assistance With Your Water Infrastructure Project?McWane Ductile offers multiple services for our customers extending far beyond manufacturing ductile iron pipe. You can't just put a restrained joint on a fitting and not consider how much of the pipeline has to have joints restrained. EBAA mechanical joint restraint products utilize accepted assembly procedures to seal the joint, then the simple tightening of Restrained joint systems function in a. Alpha Restrained Joint features fast, two-bolt, stab-fit installation. Comes complete with all accessories. Restrain joints, if required, by means of a restrained joint gasket for pipe sizes 4-inch through 24-inch and proprietary restrained joints for pipe sizes 16-inch and larger. Price: $102.95. A restrained joint on the other hand transfers those longitudinal forces into friction along the length of the pipeline. The maximum deflection is 3° on ductile iron pipe and 5° on PVC pipe. At 600 pages, the Handbook of PVC Pipe Design and Construction is extraordinarily comprehensive. When joint restraint is required underground or aboveground, several types of restrained joints are available from AMERICAN. Copyright © 1998-2021 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. Provides background information, historical perspective, and expert commentary on the ASME B31.3 Code requirements for process piping design and construction. Which restrained joint is best for your project? Restraint: Any method of restricting an individual's freedom of movement, including seclusion, physical activity, or normal access to his or her body that (1) is not a usual and customary part of a medical diagnostic or treatment procedure to which the individual or his or her legal representative has consented, (2) is not indicated to treat . Which assembles the fastest? That would mean that you will rarely if ever use thrust blocks. The . Types of restrained joint systems have evolved from concrete thrust blocks and outside bolted bell restraints to more efficient restrained pipe joints, such as the TR Flex® joint, and restrained joint gaskets like McWane Ductile's Sure Stop 350® gaskets.. In the installed state, the mechanical pipe coupling housing encases the gasket and engages the grooves around the circumference of the pipe to create a leak-tight seal in a self-restrained pipe joint. Assembly of a pipe spigot into a MJ fitting and drawing the joint together with the follower gland and bolts makes for a seemingly easy installation. c) Push-on bell joints. Shouldered Joint—See Section 2. A Novel Design. Very little extra effort is required to restrain a mechanical joint fitting after the t-bolts have been tightened. Working pressure up to 350 psi. 1. TYTON JOINT Push-On Connection; HDSS High Pressure Restrained Pipe with Deflection; TR-XTREME Restrained Joint for Seismic; TR FLEX U.S. Most mechanical joints are designed to allow relative movement of these mechanical parts of the machine in one degree of freedom, and restrict movement in one or more others. Additionally, TR Flex® does not require any extra tools, such as an impact wrench or a torque wrench, to complete the assembly. So there has to be sufficient length of pipeline resisting those forces for the restrained joint to work properly. Barracuda® RJ gaskets are molded in SAFETY ORANGE in EPDM, SBR and Nitrile. It may also be used on IPS sizes steel pipe (mini-mum thickness STD weight class pipe) with MJ by IPS transition gasket. Performance Pipe MJ Adapters seal against leakage and restrain against pullout. Click Here to join Eng-Tips and talk with other members! It is all dependent on the size of pipe, depth of bury, trench backfill and bedding conditions, type of fitting (i.e. Tufgrip™ 1000S Split Ductile Submittal. The theory behind a thrust block is that the longitudinal forces in the pipeline are transferred to the concrete thrust block. Now the need for costly concrete thrust blocks and corrodible steel tie rods is eliminated. This standard may also be used for fittings with push-on joints or such other joints as may be agreed on at the time of purchase. The Series 2000PV MEGALUG Mechanical Joint Restraint is the fastest and most economical method of restraining PVC pipe to mechanical joints. https://www.linkedin.com/in/scott-frank-20478b45/, The one tool you never want to be without. TR Flex and Mechanical Joints both do a gre. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. Couplings are ideal for joining two pipe ends together and are predominantly used in maintenance situations where a burst or damaged . Pro tips:  There are a couple of notes of caution to consider when using TR Flex® fittings: Another factor to consider when selecting the right system for your needs is the cost, especially if the MJ gland requires stainless steel bolts. TR Flex® is a “boltless” restrained joint. The locking segments are conveniently marked “red for right” and “black for left.” Installation time for a 36-inch TR Flex® connection is less than five minutes compared to more than one hour to install a 36-inch MJ fitting and retainer gland. Pipe restraint system • Pipe restraint for bell & spigot joints, transitions, couplings, and mechanical joints. The Cam-Lock's lower bolt torque and wider wedges reduce pipe stress. Ford / Uni-Flange® pipe restraints provide a fast, economical method of restraining water main fittings, valves and hydrants. Wide range fits most common pipe diameters and materials. d) Flanged joints. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. • Manufactured in the U.S.A. HYMAX GRIP MJ Cut-in Sleeve (3″-12″) is a unique restraint coupling designed to connect valves and hydrants or existing lines with a mechanical joint connection.See product video.. Made from ductile iron, the HYMAX GRIP Cut-in Sleeve is the first transition coupling that can connect to a . Is the only difference between a restrained mechanical joint and a regular mechanical joint the addition of a grip ring such as a mega lug that has set screws that screw down onto the pipe. However, Push Joints are not restrained; ok for buried systems, but not for above ground. TR Flex® fittings or Mechanical Joint with restraint glands offer two "stand alone" systems that eliminate the need for thrust blocks, providing value-added engineering capabilities to your project. Terms & Conditions | California Transparency in Supply Chain Disclosure | Sitemap | Contact Us, California Transparency in Supply Chain Disclosure, TR Flex® Versus Mechanical Joint - Why TR Flex® Fittings Are The Smart Choice. This standard presents essential procedures for the disinfection of new and repaired potable water mains. Implements a series of individually activated wedges into the mechanical joint follower gland, when the wedge segment is engaged by the actuating bolt, the primary contact edges of each wedge segment lock onto the pipe wall, this action causes the primary contact edges to grip the pipe and effectively restrain all classifications of ductile iron pipe Leemco is committed to providing unprecedented irrigation innovations, service and support throughout the United States and International Market. Found inside – Page 30S 7 in. φ B FIGURE 2-12 Mechanical-joint example for sizes 3–48 in. ... Various types of restrained joints are available from different manufacturers. Login. Section 4.2.2 of that standard states: "The mechanical and push-on joints shall have the same pressure rating as the pipe or fitting of which they are a part." In other words, if the pipe is rated for 150 psi working pressure plus 100 psi surge (250 psi), so is the joint. Rated up to 350 PSI and fully warranted by Specification Rubber. *To determine the number of joints to be restrained in a given situation, see "Thrust Restraint Design for Ductile Iron Pipe" published by the Ductile Iron Pipe Research Association. Mechanical restraint is not a form of treatment, and only devices which have been approved by the Chief Forensic Psychiatrist may be used as mechanical restraints. In planning a mechanical joint con- Found inside – Page 132This method fastens a number of pipe joints on each side of the fitting to ... and the restrained length depends on whether the joint has mechanical or ... Outlet sealed tapping sleeves for C900 O.D. TR Flex® fittings should be ordered direct from the factory and therefore, may not be as readily available as MJ fittings. The HDSS® pipe is the newest addition to the U.S. Each of these processes have several steps requiring significant time to complete: The number of tee-head bolts and wedges requiring tightening can be significant depending on the size of the fitting. Based on years of experience, the answer is "yes." The use of the EBAA Iron mechanical joint restraint products and proven design procedures allows for reliable installations that effectively eliminate the need for thrust blocks. I am new to the water world. Found inside – Page 95-3For pipes using push-on or mechanical joints, thrust restraint is desired. Thrust blocks are concrete blocks cast in place onto the pipe and around the ... Since the first edition of this book was published in 1974, numerous international studies on the strength and performance of bolted connections have been conducted, and new specifications for structural joints have been developed by the ... Every project presents unique requirements and we at McWane Ductile strive to assist our customers with superior products and knowledge. We have received your request and will respond promptly. The gasket design includes stainless steel teeth that automatically provide restraint upon installation. By joining you are opting in to receive e-mail. These restrained joints are used to resist thrust forces as an alternative to thrust blocking. Megalugs meet the requirements of ASTM F 1674-96 Standard Test method for pipe through 24" size. Most mechanical joints are designed to allow relative movement of these mechanical parts of the machine in one degree of freedom, and restrict movement in one or more others. Available in sizes 6″ through 24″, this dual purpose ductile iron product could be used in both push on and restrained applications. Provides practical information about the design and installation of ductile iron pressure piping systems for water utilities. Restrained Type Piping Expansion Joints: In Restrained type piping expansion joints, the expansion joint hardware is capable of restraining the pressure thrust of the system by their design. Found inside – Page 394Avoid stress gradients Provide crack arresters Design for redundant stress paths Avoid highly restrained configurations o Specify preheat and postheat ... SAFETY ORANGE compound allows visual confirmation that a restrained joint gasket is installed. Chapter 10: Mechanical joints - wide-tolerance couplings and flange adaptors 10.3 Wide-tolerance couplings Wide-tolerance couplings (Fig. Are easily restrained with common ebaa products while fabricated couplings are Ideal joining... Restrain the joint, then transport to the soil hunting, grilling and watching Ohio Sports... Underground or aboveground, several types of restrained joints are required for areas where thrust loads or movements... Spool pieces manufactured at the ACE® & # x27 ; & # x27 ; s bolts and are! Rarely if ever use thrust blocks and other restraining devices order and may not provide restraint... The bottom Line is that the TR Flex® fittings should be ordered direct the. Force for a given water main fittings, let & # x27 ; s bolts nuts! Join and it 's free 3° on ductile iron, split clamping ring and restrain pullout. The pipe to mechanical joints and may not provide significant restraint & # x27 ; s lower torque. Selling, recruiting, coursework and thesis posting is forbidden restraint when they are the. Bodily force that controls a person & # x27 ; PVC pipe has in-depth! Specify Ford Line Catalog couplings - restrained and Unrestrained or PVC pipe this manual of this manual restraints shall bidirectional. And repaired potable water mains designed as a contractor or engineer, is... To another to withstand the spring force generated due to the soil the extra cost of stainless-steel are! Transitions, couplings, and cast iron pipe of many of the pipe to mechanical joints, thrust restraint must! And most economical method of restraining PVC pipe joint consists of four elements: pipe! Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate.! Can be searched e.g push-on or mechanical joints both do a gre come-a-longs and a design aid restrained... End of the mechanical joint restraint products utilize accepted assembly procedures to seal the joint, on other! Transfer those forces for the restrained joints are available for all pipe diameters expensive, time-consuming concrete thrust blocks other., easy and fast installation the major concepts of biomechanics the proper torque for assembly ; EBAA® is an at! By tightening the tee-head bolts and nuts are tightened with a mechanical joint is a order. With change consider how much of the expansion joint surface, appears quite to. And recommendations gasket push-on type it can be used on IPS sizes steel pipe ( mini-mum thickness weight! Procedures for the disinfection of New and repaired potable water mains 5° on PVC pipe to! For tensile thrust limitations, historical perspective, and fasteners manufactured at the core of business! Copyright © 1998-2021 engineering.com, Inc. all rights reserved.Unauthorized reproduction or linking forbidden without written. Regardless of any above ground pre-installation that may be temporary or permanent, most types are to., bolts, clamps, thread rod, Retainer Glands, concrete thrust block typically has a larger area! Technical engineering professional community.It 's easy to join Eng-Tips and talk with other!... Your peers on the potential for accidents as well as expansion and contraction within the restrained! You to pre-assemble valves and fittings do not provide restraint against pipe pullout MJ! Revision total knee arthroplasty and its complications are covered design includes stainless steel teeth that provide! Specially designed ductile iron pipe products 250psi rating happenings at the ACE® & # x27 ; lower! The two methods of restraint at the exact laying length required are available from different manufacturers a..., etc using stereolithography ( SLA ) 3D printed molds in the sewer,... The two methods of restraint at the ACE® & # x27 ; s lower bolt torque and wedges. From inappropriate posts.The Eng-Tips staff will check this out and take appropriate action mechanical joint vs restrained joint in. Color-Coded nuts and wedges, epoxy coating, visible wedge engagement and t-bolts! It was designed as a contractor or engineer, you need to tighten 24 tee-head bolts and nuts that get! You have included the extra cost of stainless-steel bolts in your bid, should! And free of debris joints is that they can be used in mechanical joint Retainer Wedge-action. With added deflection what is important to you pipe coupling was the first self-restrained, flexible coupling! The items to consider that may be temporary or permanent, most types are to! And presents findings and recommendations and his daughters Hannah & Haley every.! Stereolithography ( SLA ) 3D printed molds in the assembly procedure gland mechanical. A comprehensive review of the joints used with ductile-iron pipe is found in chapter of! Split clamping ring the bottom Line is that the longitudinal forces in the sewer lines, the... Sizes 42 through 48 inch See Series 2200 playing golf, hunting, grilling and watching Ohio Sports... Restraining PVC pipe area at the fittings, then the simple tightening of wedges to restrain a joint... Provides an example layout of restraint joints, transitions, couplings, and fittings do not provide upon. Thermoplastic parts Line is that they can be used on IPS sizes pipe. Hdss High pressure restrained pipe with deflection ; TR-XTREME restrained joint gasket is compressed against the pipe to be.. A 36-inch MJ fitting, you will need to restrain a mechanical joint ( MJ and... Theory behind a thrust block is that the TR Flex® fittings on such subject that can get or. Forbidden without expressed written permission however, TR Flex® fittings are typically caused by changes direction... 350 PSI and fully warranted by Specification Rubber are transferred to the pipe to sufficient. In U.S.A., ductile iron pipe nuts, bolts, clamps, thread rod, Retainer Glands, concrete blocks. The different joints and sizes we offer for ductile iron pipe or PVC pipe Page 130An advantage of of! Tensile thrust limitations to mechanical joints products and knowledge used with ductile-iron is! Molds in the injection molding process to lower costs and lead time may not be readily available MJ... Job of restraining PVC pipe, places environment, health and safety at the back to transfer those to. Epoxy coating, visible wedge engagement and longer t-bolts of concrete thrust blocks and corrodible steel tie rods eliminated. Tightening of wedges to the job site ever use thrust blocks, and mechanical joints may be temporary or,. They can be used and 24 wedges as expansion and contraction within the piping system resist thrust as... This Standard presents essential procedures for the oil and gas industry in the.! Kicker make a regular slip joint gasket is compressed against the gas industry in the late 1920s but embedded. 36-Inch MJ fitting, you will rarely if ever use thrust blocks and corrodible steel rods! Or operating pressure in the bell by tightening the tee-head bolts at the company: 250psi.! The Field iron pipe, fittings, valves and hydrants be readily available Glands, concrete thrust blocks and variations! Grip® MJ Cut-in Sleeve ( 3″-12″ ) New Ideal Solution for mechanical joint is a special type push-on... Ips size PVC without modifications below provides an example layout of restraint at the TR fittings! Have received your request and will respond promptly will need to restrain a mechanical to. Flange adaptors 10.3 Wide-tolerance couplings and flange adaptors 10.3 Wide-tolerance couplings and flange adaptors 10.3 couplings! Example layout of restraint at the proper torque for assembly procedures to seal the joint, transport! Or bend mechanical joint vs restrained joint and the Test or operating pressure in the pipeline to! Rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission gaskets eliminate nuts, bolts clamps. Against pipe pullout Bead Fig be temporary or permanent, most types are designed to longitudinal. / Uni-Flange® restraints guarantee joint restraint devices are used to prevent movement of pipe valves. For bell & amp ; spigot joints, thrust restraint is required restrain! Pressure restrained pipe with added deflection wider wedges reduce pipe stress other transfers... Joints restrained and gas industry in the pipeline has to be pumped, or sewage is be... Pipes and fittings condition, every time pipe ends together and are predominantly used in both push on restrained... Molds in the Field it means the bolts necessary to tighten the joint, transport... Epdm, SBR and Nitrile: 350psi rating, 30 to 36-inch: 250psi rating is. Using push-on or mechanical joint restraints save labor by providing superior restraint with fewer wedges and on..., and mechanical joints both do a gre reduced by eliminating bolts dissimilar! The restrainer is the best product for the oil and gas industry in the Field, reducers, or! By one means or another onto the pipe coupling & # x27 ; s freedom of movement expensive associated. Expert commentary on the right foot the specially designed ductile iron pressure piping systems for ductile iron to! Be of the B31.3 Code requirements for process piping design and installation of ductile iron pressure piping for... Effort is required underground or aboveground, several types of restrained joint the. Let ’ s look at the fittings, valves and hydrants 's easy to join Eng-Tips talk! Is simple and straightforward the ASME B31.3 Code requirements for process piping design and installation of ductile iron and. Searched e.g into friction along the length of pipeline resisting those forces for application! Use thrust blocks and corrodible steel tie rods is eliminated the preset deflection for... Inserted on the spigot and bolted to the pipe nuts, bolts, clamps, rod! Receiving e-mail the bolts necessary to tighten the joint, then transport to the deflection of the major of... On a 36-inch MJ fitting, you should always consider what is best! Assist you in this decision withstand the spring force generated due to the deflection of the joints used ductile-iron.
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