Pdf thrust restraint design for ductile iron pipe guru. Rubbergasket joints for ductileiron pressure pipe and. It contains an overview of wall thickness design and includes a discussion of the most common types of joints that are available as well as linings and corrosion protection with. Awwa manual m41 on ductile iron pipe and fittings is also available from awwa. Ductile iron pipe now is a function only of the difference in the outside diameters. This reduction was based on more than 20 years of research by the cast iron pipe research association cipra, now the ductile iron pipe research association dipra, on experimental test lines having cementmortar linings ranging from 1.
The following links organize the technical publication by topic. Ductile iron pipe design nsf certified to ansinsf 61 866. Ductile iron pipe guidelines technical publications. About 550 years ago, the first cast iron pipes were made with flanged joints, using lead or leather gaskets. For more information, please contact our department of marketing and specifications. Added support for up to 54 inch pipe diameter for pvc. Benefits of ductile iron pipe ductile iron versus pvc ductile iron versus steel environmental benefits sustainable pipe certification the truth about epds vbio. In this context, the value chosen for k n depends on the compaction achieved in the trench, the backfill materials, and the undisturbed earth. Ansiawwa c203 coal tar protective coatings and linings for. Both materials have identical yield strengths and the same nominal factor of safety of 2. Crabtree, dipra research coordinator and richard w. Gaston, american cast iron pipe company, birmingham, ala.
Is0 7186 ductile iron products for sewage applications. Ductile iron pipe and fittings are most often joined with pushon figure 1 or mechanical joints. Ductile iron tr flex pipe 4 36 bell details tr flex restrained joint ductile iron pipe and fittings pipe size in. Dipra has a technical publication to address virtually every aspect of the application of ductile iron pipe. Quickly recognized as a pipe material with all the good qual. Bridge crossings with ductile iron pipe mcwane pocket. Technical publications dipra has a technical publication to address virtually every aspect of the application of ductile iron pipe.
The cast iron pipe research association cipra became the ductile iron pipe research association dipra in 1979. Over the years, dipra has conducted a series of flow tests on cementmortar lined gray pipe and ductile iron pipes that have been in service for extended periods of time in. C h u c k s e a l with the 1993 revision of the standard, the section on materials was also updated to include class b colored polyethylene to allow for color coding of potablereclaimed. Ductile iron pipe is made from recycled ferric scrap, resulting in as high as 95% recycled content dipra member companies are committed to achieving targets the ensure the health and safety of employees and the public ductile iron pipe is designed to ensure 100 years of service life ductile iron pipe earned 69 points, including. Access dipra publications on ductile iron pipe design, available in pdf format for immediate downloading. Metric conversion factors are provided in chapter 10 for your convenience. Ductile iron pipe is normally manufactured in 18 or 20foot nominal lengths, depending on the pipe manufacturer and pipe size. This manual is intended as a guide for field welding and cutting. R117 the handbook of pvc pipe design and construction, 5th edition, 2012. Ductile iron pipes, fittings, accessories and their joints for gas pipelines dn 80 600mm ductile iron pipesexternal zincbased coating, zinc rich paint with finishing layer suitability of nonmetallic products for use in contact with water intended for human consumption with. The average value of c for new pipe of 4inch through 36inch diameter was found to be 144.
B i l l c a r t e r 2 ductile iron pipe ductile iron pipe. Horn, ductile iron pipe research association, birmingham, ala. Ductile iron pipe is a flexible conduit that is centrifugally cast from homogeneous molten ductile iron in accordance with the ansiawwa c151a21. The manual describes ductileiron pipe and fitting products, appurtenances. M41 ductileiron pipe and fittings, third edition american water. Charko, mcwane cast iron pipe company, birmingham, ala. However, ductile iron pipe s conservative wall thickness design doesnt stop here. Bsen 545 ductile iron pipes, fittings and accessories and their joints for water pipelines. The ductile iron used to manufacture the pipe is characterized by the spheroidal or nodular nature of the graphite within the iron. A more detailed description of the joints used with ductileiron pipe is found in chapter 5 of this manual. For ductile iron pipelines ductile iron pipe and fittings. They are available in pdf format for immediate downloading. Service and casting allowances ductile iron pipe design. For decades, the ductile iron pipe research association dipra, formerly the cast iron pipe research association cipra, has researched corrosion control methods including select backfill, bonded coatings, concrete coatings, sacrificial coatings, and cathodic protection.
Methodology for use and laying of ductile iron pipes. Installation guide for ductile iron pipe ductile iron pipe research. Restrained joints are rated up to 350 psi working pressure for 4inch through 24inchdiameter ductile iron pipe, and up to 250 psi working pressure for 30inch through 64. Us pipe customer service facts mcdade waterworks, inc. While dipra member companies have different names and. Neither of these joints provides significant restraint against longitudinal separation other than the friction between the gasket and the plain end of the pipe or fitting. No more thorough and comprehensive standard design procedure exists for any piping material. Find dipra publications on cutting, welding, and other important guidelines for ductile iron pipe.
Proper installation procedures will add immeasurably to the long and useful life of ductile iron pipe. Added support for up to 64 inch pipe diameter for ductile iron and poly wrapped ductile. It discusses the history of cast iron pipe and the introduction of ductile iron pipe. Pdf awwa standard ductileiron pipe, centrifugally cast. It is recognized that there are differences between ductile iron and steel.
A century ago, dedicated american engineers installed iron pipe to create the countrys water systems. However, unforeseen circumstances might require field welding of retainer rings, thrust collars, etc. How polyethylene encasement protects ductile iron pipe at the trench, crew members encase ductile iron pipe with a tube or sheet of polyethylene immediately before installing the pipe. Pdf ductileiron pipe and fittings manual of water supply. One of the most important reasons for the success of ductile iron pipe is that, like gray iron pipe before it, it is the subject of the most extensive series of product standards in the pipe industry. The manual describes ductile iron pipe and fitting products, appurtenances. Ductile iron pipe research association, 245 riverchase parkway east, suite o, birmingham, al 35244. This technical publication is a general introduction to ductile iron pipe. The bell and spigot joint, which was assembled by caulking yarn or braided hemp.
Dipra representatives sit on the defining standards committees of the awwa, asme, astm, nace, nfpa, and. Ductile iron pipe is widely recognized as the industry standard for modern water and wastewater systems. This technical publication discusses the design basis and important criteria used in the wall thickness design of ductile iron pipe. Save complete american ductile iron pipe and fittings manual 12. Ductile iron pipe is adequate for the rated working pressure indicated for each nominal size plus a surge allowance of 100 psi 689 kpa. This gray cast iron pipeline was in service for more than 330 years. M41 ductileiron pipe and fittings, third edition pdf. Find dipra publications on cutting, welding, and other important guidelines for ductile iron pipe installation. These standards and manuals are available from the american water works. The most common joints used with ductile iron pipe.
Design basis the basis of the design standard for ductile iron pipe is the longestablished fact that ductile iron pipe, subjected to. Ductile iron pipe and fittings manual of water supply practices m41 third edition awwa manual m41. Today such pipes are manufactured from ductile iron. Ductile iron pipe joints and their uses by richard w. Calculator is now fully responsive with optimized views for smaller devices tablets and phones. Carlesen, rodger j thrust restraint for underground piping systems, ductile iron pipe news, cipra, spring 1975. Beam span for ductile iron pipe on supports ductile iron pipe is normally manufactured in 18 or 20foot nominal lengths, depending on the pipe manufacturer and pipe size. Guidelines installation guide for ductile iron pipe. The ductile iron pipe research association dipra does not support indiscriminate field welding of ductile iron pipe. A controlled amount of molten iron is introduced into the rotating mold, which generates a centrifugal force that holds the iron in place against the mold until it solidifies.
Over the years, dipra has conducted a series of flow tests on cementmortar lined gray pipe and ductile iron pipes that have been in service for extended periods of time in water distribution systems across the country. Pipe wall thickness design in ductile iron pipe is a simple, yet conservative process. The polyethylene acts as an unbonded film, which prevents direct contact of the pipe with the corrosive soil. Ductile iron pipe cast iron pipe ductile iron pipe cast iron pipe ductile iron pipe cast iron pipe ductile iron pipe cast iron pipe ductile iron pipe cast iron pipe ductile iron pipe cast iron pipe pipe material 6. For the convenience of the designer, dipra has developed a computer program thrust restraint design for ductile iron pipe to assist with calculations for most restrained joint configurations.
This strong, safe, and reliable product has stood the test of time. This twoyear research effort was undertaken in cooperation with the ductile iron pipe research association dipra to evaluate the circumstances and field conditions that warrant the appropriate level of corrosion protection to achieve a useful life of 75 to 100 years. About the ductile iron pipe research association dipra from its inception more than 100 years ago, the ductile iron pipe research association dipra has provided accurate, reliable, and essential engineering information about cast iron and now ductile iron pipe to a wide variety of utilities and consulting engineers. Updated dip specifications to contemporary weights and classes. Thrust restraint design for ductile iron pipe, second edition, 1986. Each manufacturer of ductile iron pipe holds patents onits own unique designs of these joints, and, therefore, the majority of restrained joints are considered proprietary. About 550 years ago, the first cast iron pipes were made with flanged joints, using lead or leather. Ductile iron pipe is normally shipped from foundries by rail or truck and, less frequently, by barge. Continuing the tradition of service the strength, durability, and long service life of ductile s predecessor, gray cast iron pipe, are widely recognized. Pdf cementmortar linings for ductile iron pipe hector. Ductile iron pipe and fittings are ideally suited for wastewater systems. Ductile iron pipe for working pressures higher than 350 psi 2,4 kpa is available.
Rubbergasket joints for ductileiron pressure pipe and fittings. This manual is intended as a guide for field welding and cutting cementmortarlined and unlined ductile iron pipe. Pdf installation guide for ductile iron pipe ashraf ahmed. Ductile iron pipe manufacturers have been successfully welding ductile iron pipe for many years and should be consulted on their recommendations for field welding and torch cutting their product. Main applications of ductile iron pipes drinking and irrigation water networks. The most common joints used with ductile iron pipe are the pushon type joint and the mechanical joint. Typically, the pipe is manufactured using centrifugal. A bound pdf version of this reference may be brought into the test centers for use on the exam.
Ductile iron pipe in the developed world is normally manufactured exclusively from recycled material including scrap steel and recycled iron. Ductile iron pipe is specified by utilities and consulting engineers for its strength, durability, and proven longevity. Below you can find stepbystep instructional installation instructions for our various ductile iron joint types. Awwa manual m41 on ductile iron pipe and fittings is. Its affect on thrust restraint for pvc and ductile iron pipe, presented at awwa distribution systems symposium, september 1989. Ductile iron pipes, fittings and accessories pdf resolution low.
This type of pipe is a direct development of earlier cast iron pipe, which it has superseded. A more detailed description of the joints used with ductile iron pipe is found in chapter 5 of this manual. These characteristics also provide added security against stresses induced by water hammer, highway traffic and unexpected adverse forces. Ductile iron pipe is pipe made of ductile cast iron commonly used for potable water transmission and distribution. Dipra research and technical director introduction joints for iron pipe have come a long way. Underground utility contractors trade knowledge exam. Therefore, the ductile iron pipe research association dipra has prepared. Pipe, published by the ductile iron pipe research association dipra. Pdf installation guide for ductile iron pipe ashraf.
Design tables based on ductile iron pipe data and suggested loads are also provided. Dipra computer programs thickness design of ductile iron pipe hydraulic analysis of ductile iron pipe thrust restraint design for ductile iron pipe design of ductile iron pipe on supports awwa standards ansiawwa c104a21. From tyton to thrustlock, we provide the help you need to get the job done right. This manual is intended as a guide for field welding and cutting cementmortar. For decades, the ductile iron pipe research associa tion dipra, formerly the cast iron pipe research asso ciation cipra, has researched corrosion. The equations for calculating the thrust forces are covered in the dipra manual thrust restraint design for ductile iron pipe. American ductile iron pipe has the highimpact strength and toughness to withstand shocks usually encountered in transportation, handling and installation. In terms of environmental impact, several studies have compared ductile iron pipe s impact on the environment with that of other pipe materials. Therefore, the ductile iron pipe research association dipra has prepared this guide to assist water utilities, contractors, consult.
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