Pipe Hanger Design & Engineering For the most current product/ pricing information on ASC Engineered Solutions, please visit our website at asc-es.com. Today Anvil® International is the largest and most complete fitting and hanger manufacturer in the world. 2004 Anvil® International acquires Star Pipe Products, Building and Construction Divisions (SPF) and forms AnvilStarTM Fire Products Division. 2001 Anvil® International acquires Merit® Manufacturing and Beck Manufacturing. 2000 The industry’s trusted manufacturer of pipe fittings, hangers and grooved fittings is renamed Anvil® International, Inc. TRUSTED 1999 Tyco sells the distribution and manufacturing FOR 150 YEARS operations known up to this point as ”Grinnell Supply Sales”, but keeps the Grinnell® trademark. We built our reputation from the ground up. Anvil’s history stretches back to the mid 1800s, when a company named Grinnell® began providing its customers with the finest quality pipe products. ™ ™ 1994 J.B. Smith and Catawissa join the Grinnell Since 2000, those quality products and services— Supply Sales and Manufacturing division. and the people who provide them—have been known as Anvil® International. Anvil® customers receive the quality and integrity that have been building strong connections in both products and business relationships for over 150 years. Focused Product Line: 1969 Grinnell Co. acquired by International Telephone ® ® and Telegraph. Two years later, ITT divests the Fire Anvil Malleable and Cast Gruvlok Couplings, Protection Division, but keeps the manufacturing Iron Fittings Fittings and Va lves and sales divisions that will become known as Anvil ® Hangers, Supports SP F TM Malleable and Cast ® Anvil International. and Struts and Ductile Iron Fittings Beck Welded Pipe Nipples SP F TM Grooved Fittings Anvil ® Seamless Pipe and O’Let s 1960 Gruvlok® line of grooved fittings is introduced. Nipples J.B. Smith Swage Nipples Anvil ® Steel Pipe Couplings and Bull Plugs and Small Steel Fittings Catawiss a ® Wing Unions Meri t ® Tee-Lets and Drop and Check Valves 1919 General Fire Extinguisher Co. becomes Grinnell Co. Nipples 1909 Frederick Grinnell opens a foundry in Cranston, RI. Companies express interest in buying its piping products, laying the groundwork for what would become the Grinnell Supply Sales Division. It would be these manufacturing and sales operations that eventually become Anvil® International. 1850 Providence Steam & Gas Pipe Co. is formed, and Frederick Grinnell purchases a controlling interest. Grinnell® is a registered trademark of Grinnell Corporation, a Tyco International Ltd. company. BUILDING CONNECTIONS THAT LAST ANVIL BRANDS: ® PIPING and PIPE HANGER DESIGN and ENGINEERING WEIGHTS OF PIPING MATERIALS LOAD CALCULATION PROBLEM The material in this booklet has been compiled to furnish pipe The "Hanger Load Calculation Problem" is typical of the actual hanger engineers with the necessary data and procedures to steps required in the solution of any pipe hanger installation. determine pipe hanger loads and thermal movements of the pipe at each hanger location. Great care was taken in collecting and printing data in this The tabulation of weights has been arranged for convenient booklet to assure accuracy throughout. However, no selection of data that formerly consumed considerable time to representation or warranty of accuracy of the contents of this develop. In many instances this information was not available booklet is made by Anvil. The only warranties made by Anvil for general distribution. This made it necessary to develop are those contained in sales contracts for design services or average or approximate weights that may be substituted with products. actual weights whenever practical. CONTENTS .............................................................................. Page Design of Pipe Hangers ................................................................ 4 Determination of Hanger Locations............................................. 4 Hanger Load Calculations ............................................................ 6 Thermal Movement Calculations ............................................... 11 Selection of the Proper Hangers ................................................ 13 Typical Pipe Support Specification............................................ 21 Nuclear pipe Hangers.................................................................. 24 Seismic Supports ........................................................................ 24 Supports for Grooved Piping ..................................................... 27 Application Examples ................................................................. 30 Weights of Piping Materials ........................................................ 37 Charts and Tables........................................................................ 63 Copyright © 2003 Anvil International, North Kingstown, R.I. sales offices and warehouses on back cover www.anvilintl.com Anvil International, Piping & Pipe Hanger Design and Engineering 3 THE DESIGN OF PIPE HANGERS INTRODUCTION The steps in which the engineer applies this information are: To avoid confusion, it is necessary to define the terms pipe (1) Determine hanger locations. hanger and pipe support and clarify the difference between (2) Calculate hanger loads. the two. Pipe hangers are generally considered to be those (3) Determine thermal movement of the piping at each metal elements which carry the weight from above with the hanger location. supporting members being mainly in tension. Pipe supports are considered to be those elements which carry the weight (4) Select hanger types: spring assembly, either constant from below with the supporting members being mainly in support, variable spring type, rigid assembly, etc. compression. (5) Check clearance between the hanger components and nearby piping, electrical cable trays, conduits, ventilating It has become widely recognized that the selection and design ducts, and equipment. of pipe hangers is an important part of the engineering study of any modern steam generating or process installation. The final step will not be discussed to any great degree. This Problems of pipe design for high temperature, high pressure aspect of design is governed solely by the requirements and installations have become critical to a point where it is layouts of the individual job. Instead, attention will be devoted imperative that such aspects of design as the effect of to steps 1 to 4, where the scope of good hanger practice can concentrated hanger loads on building structure, pipe weight be generally defined for any installation. loads on equipment connections, and physical clearances of Recognizing that each new piping design presents many new the hanger components with piping and structure be taken challenges to the engineer, no attempt is made to state fixed into account at the early design stages of a project. rules and limits applicable to every hanger design. Rather, the Engineers specializing in the design of pipe hangers have intention is to illustrate ideas which will serve as a guide to a established efficient methods of performing the work required simple, practical solution to any pipe support problem. to arrive at appropriate hanger designs. However, the engineer who devotes varying portions of his time to the INTEGRAL ATTACHMENTS design of pipe hangers often must gather a considerable Integral attachments are fabricated so that the attachment is amount of reference data peculiar only to the hanger an integral part of the piping component. Examples of integral calculations for his current project. attachments include ears, shoes, lugs, cylindrical attachments, It is the purpose of this article to present a compilation of all rings and skirts. Integral attachments are used in conjunction information necessary for the design of hangers, including a with restraints or braces where multi-axial restraint in a single technical section devoted to the listing of piping material, member is required. Of particular importance is the localized weights, and thermal expansion data. Also, the discussions of stresses induced into the piping or piping component by the the various steps involved in designing supports, presented integral attachments. Several methods to determine the local here in their proper sequence, should serve as a good stresses are available including relatively simple hand/ reference source for the engineer who only occasionally cookbook calculations provided in Welding Research Council becomes involved in the essentials of hanger design. (WRC) Bulletins 107, 198, and 297, ASME Code Cases N-318 and N-392, or through a detailed finite element analysis. The first of these steps is that of determining and obtaining Section 121 of ASME B31.1 discusses additional consider- the necessary amount of basic information before proceeding ations for integral attachments. with calculations and detailing of the pipe supports. No design is complete unless the engineer has had the opportunity to HANGER SPANS review the equivalent of the following project data: Support locations are dependent on pipe size, piping • The pipe hanger specification, when available (A typical configuration, the location of heavy valves and fittings, and the hanger specification is shown on pages 21 and 22). structure that is available for the support of the piping. • A complete set of piping drawings. No firm rules or limits exist which will positively fix the location • A complete set of steel and structural