DOCSLIB.ORG

Tapered Pipe Threads and Fittings: Making the Connection | ISM

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Tapered Pipe Threads and Fittings: Making the Connection | ISM 30/5/2564 Tapered Pipe Threads and Fittings: Making the Connection | ISM 800.781.8487 ISM End your search, simplify your supply chain Industrial Specialties Mfg. & IS MED Specialties ISO 9001:2015 Certied Companies Menu TAPERED PIPE THREADS AND FITTINGS: MAKING THE CONNECTION ENSURING A GAS OR LIQUID-TIGHT CONNECTION MEANS UNDERSTANDING TAPERED PIPE THREADS NPT, National Pipe Taper (American) and BSPT (British standard Pipe Taper) are tapered pipe thread standards. Male and female tapered pipe threads wedge themselves together but need a sealant for a completely leak-free connection. Sealants ll any voids between the threads that could travel along the thread spiral. Tube and pipe are not the same thing Tube and pipe are hollow structures designed to provide a path for the ow of uids or gases. The main difference between tube and pipe is that pipe walls are thicker and stiffer. Tubing is never threaded because its walls are too thin. Pipe walls are strong enough to support cut or molded threads. Threaded pipe can provide gas or liquid-tight connections that are mechanically strong. Pipe threads There are many national and international standards for pipe threads. They vary by intended use such as garden hose threads and re hose threads among others. There are also historical developments behind “standard” pipe sizes and the shapes of threads. Examples of this are the differences between American and British threads. Units of measure play a part too. How to Install The two basic categories of pipe thread Plastic Thread Fittings • Parallel or straight pipe thread • Tapered pipe thread Take a look at a selection of ISM's metal threaded ttings and plastic threaded ttings. These provide examples of the most common pipe thread types in use. Tapered pipe threads Piping and ttings are primarily used to carry liquids and gases. Because of this, they need to have threaded connections that are gas or liquid tight. Tapered threads help make better seals. The male and female threads compress and wedge themselves together. As a result, these connections are stronger and leak resistant. The two most common standards for tapered pipe threads NPT American National Standard Taper Pipe Thread BSPT British Standard Pipe Taper Thread NPT pipe thread is the most common tapered pipe thread used in the United States and Canada and is incompatible with BSPT pipe threads. https://www.industrialspec.com/about-us/blog/detail/tapered-pipe-threads-standards-intro 1/7 30/5/2564 Tapered Pipe Threads and Fittings: Making the Connection | ISM Why NPT and BSPT pipe threads are incompatible Thread angle or included angle NPT threads have a 60-degree angle BSPT threads have a 55-degree angle Thread shape NPT threads have attened peaks and valleys BSPT threads have rounded peaks and valleys Thread pitch (TPI, threads per inch) Each NPT and BSPT pipe thread size has a specic number of threads per inch Some common acronyms for American tapered pipe thread types NPT National Pipe Thread Taper FPT, FNPT, NPT(F)* Female or internal tapered pipe threads MPT, MNPT, NPT(M) Male or external tapered pipe threads *This is not NPTF. NPTF stands for National Pipe Taper Fuel. It is also called Dryseal American National Standard Taper Pipe Thread. The design of NPTF provides leak-free connections without using sealants. There are parallel and tapered pipe threads for all pipe standards. NPS, National Pipe Straight, is the American standard for parallel or straight pipe threads. NPS threaded connections need gaskets or O-rings to seal them. Sealant and tapered pipe threads Tapered pipe threads need a sealant for leak-free connections. It lls any voids between the two threads that could cause a spiral leak. They also function as lubricants between the male and female threads. Assembling parts and pipe made of dissimilar materials need special care. This is because sealants make it easier to over tighten ttings. Over tightening ttings MODULAR CHECK VALVES can lead to damage and leaks. We've taken spring-loaded check Download the ISM Plastic Tapered Thread Fittings Installation Guide valves to a whole new level. Mix >> and match imperial and metric connections. Watch the video. Conclusion Understanding tapered pipe threads makes it easier to choose the best component, especially tapered pipe ttings. Parts with matching threads always perform better because matching threads are mechanically stronger and create better gas-tight and liquid-tight seals. What kinds of problems have you had moving between different tapered pipe thread standards when sourcing components for your application? Help us by telling others what you learned. Have questions about tapered or straight pipe threads used on ow control components? If so, send me an email - steven.williams@industrialspec.com. You can also ask questions using the comments section below. Some additional reading NPT National Standard Taper Pipe Threads Size Chart from Engineers Edge NPS Nominal Pipe Size (North America) from Wikipedia BSPT British Standard Pipe Taper Thread Sizes and Dimensions from AMES, Advanced Mechanical Engineering Solutions https://www.industrialspec.com/about-us/blog/detail/tapered-pipe-threads-standards-intro 2/7 30/5/2564 Tapered Pipe Threads and Fittings: Making the Connection | ISM p p f , g g BSP British Standard Pipe from Wikipedia About the author Steven C. Williams, BS, is the technical writer and an inbound marketing specialist at Industrial Specialties Manufacturing (ISM), an ISO 9001-2015 supplier of miniature pneumatic, vacuum and uid circuitry components to OEM's and distributors all over the world. He writes on technical topics related to miniature pneumatic and uidic components as well as topics of general interest at ISM. « Go back to the blog homepage ALSO ON ISM BLOG Elastomers and What is Acetal Plastic? The Rubbers - Is There a … — POM Plastics for … Subscribe to our blog Stan 4 years ago • 2 comments 2 years ago • 2 comments 2 years ago • 2 comments 5 yea Rubber and elastomer are Acetal plastic is also called Industrial Specialties Mfg. Post words commonly used to polyacetal or and IS Med Specialties are at IS mean any material with … polyoxymethylene … ISO 9001:2015 … Inac 11 Comments ISM Blog Disqus' Privacy Policy 1 Login Recommend 3 t Tweet f Share Sort by Best Join the discussion… LOG IN WITH OR SIGN UP WITH DISQUS ? Name Garry • 6 months ago Hello, Thank you very much for this useful article. It seems that thread sealant is mandatory to use when sealing is achieved using contact between threads. Correct me i am wrong. Can we use NPT threads for an application having temperature = 350 deg C & pressure 150 bar? IMO, pressure is not the point of concern here. But temperature is certainly a point of concern. The reason is that there are no thread sealants which can operate upto 350 deg C. But thread lubricants are available upto 800 deg C. Could you please take a moment to express your advice. Thank you in advance. △ ▽ • Reply • Share › Steven Williams Mod > Garry • 6 months ago Garry https://www.industrialspec.com/about-us/blog/detail/tapered-pipe-threads-standards-intro 3/7 30/5/2564 Tapered Pipe Threads and Fittings: Making the Connection | ISM Garry, Sealants are necessary for leakproof NPT threaded connections. I would recommend looking further for high temperature pipe thread sealant/lubricant compounds. There are definitely thread sealants available that are rated for temperatures over 350 degrees C (about 662 degrees F). You may have better luck if you search for sealant/lubricant pipe thread compounds. NPT tapered pipe thread is suitable for high temperature/high pressure applications. Simply choose fittings and pipe rated for the operating temperatures and pressures. You may want to consider using NPTF pipe threaded pipe and fittings instead of NPT. For leakproof seals, the mating threads of all the fittings and the pipe will need to be NPTF also. Unfortunately, NPTF threaded parts and pipe cost more than NPT threaded parts. NPTF threaded connections do not require a thread sealant. This is because NPTF threads are designed so that the male thread crests interfere with the female thread roots. The thread is crushed in the installation process providing the mechanical seal. For this reason, NPTF fittings and pipe are also not reusable. Here is a good reference resource that includes basic information about NPTF. It is at The Engineering Toolbox. NSI B1.20.1 - NPT - American National Standard Taper Pipe Threads https://www.engineeringtool... Steven Williams Technical Writer and Inbound Marketing Specialist △ ▽ • Reply • Share › βασίλης βελούδης • a year ago Hello, i wanted to ask i question that i have difficulty resolving. I have a ball valve of 3/4 in size and in the end, it has a 3/4 in NPT female thread. In order to connect this valve to a pipe or a fiting, do the pipe or the fiting need to have 3/4 in male NPT thread ? Thank you very much for your time. △ ▽ • Reply • Share › Steven Williams Mod > βασίλης βελούδης • 6 months ago In general, most thread pipe is used carrying liquids or gases. For these type of applications the connections need to be leak free and gas tight. To achieve this quality of a connection, thread standards need to match. You should also follow recommendations for the use of sealing compounds and/or sealing tape. Tapered pipe threads like NPT require the use of pipe joint compounds or tape. This sealing material seals threaded pipe fittings by blocking the spiral leak paths that runs along the pipe threads. Keep in mind that improper sealing or improper use of a sealant can lead to serious problems, including leaks, pipe system damage, contamination and system downtime. Proper installation includes using same material fittings or materials that are similar enough that there is no risk of stripping threads or splitting fittings.
Load more

Recommended publications
  • PLUMBING DICTIONARY Sixth Edition
    as to produce smooth threads. 2. An oil or oily preparation used as a cutting fluid espe cially a water-soluble oil (such as a mineral oil containing- a fatty oil) Cut Grooving (cut groov-ing) the process of machining away material, providing a groove into a pipe to allow for a mechani cal coupling to be installed.This process was invented by Victau - lic Corp. in 1925. Cut Grooving is designed for stanard weight- ceives or heavier wall thickness pipe. tetrafluoroethylene (tet-ra-- theseveral lower variouslyterminal, whichshaped re or decalescensecryolite (de-ca-les-cen- ming and flood consisting(cry-o-lite) of sodium-alumi earthfluo-ro-eth-yl-ene) by alternately dam a colorless, thegrooved vapors tools. from 4. anonpressure tool used by se) a decrease in temperaturea mineral nonflammable gas used in mak- metalworkers to shape material thatnum occurs fluoride. while Usedheating for soldermet- ing a stream. See STANK. or the pressure sterilizers, and - spannering heat resistantwrench and(span-ner acid re - conductsto a desired the form vapors. 5. a tooldirectly used al ingthrough copper a rangeand inalloys which when a mixed with phosphoric acid.- wrench)sistant plastics 1. one ofsuch various as teflon. tools to setthe theouter teeth air. of Sometimesaatmosphere circular or exhaust vent. See change in a structure occurs. Also used for soldering alumi forAbbr. tightening, T.F.E. or loosening,chiefly Brit.: orcalled band vapor, saw. steam,6. a tool used to degree of hazard (de-gree stench trap (stench trap) num bronze when mixed with nutsthermal and bolts.expansion 2. (water) straightenLOCAL VENT.
    [Show full text]
  • PP & PVDF Pipe, Valves & Fittings
    PP & PVDF Pipe, Thermoplastic Flow Solutions Valves & Fittings ® ol r t Chem ® Chemtrol® is a brand of ® www.chemtrol.com For ideas that fit your industrial flow-control applications, Thermoplastic Flow Solutions ® you can count on Chemtrol. Our high quality line of l o r t thermoplastic valves, fittings, and pipe are ideas that last. Ideas that save money. Ideas whose time has come. Chem Proven Innovative Technical service Education and dependability. technology. and sales support. training. Chemtrol flow-control Great ideas flow from Our technical specialists We help you learn about the products are unsurpassed in Chemtrol in PVC, CPVC, PP, are some of the best in the benefits of thermoplastics performance and longevity. and PVDF products for a business. As part of your through excellent programs: With more than 55 years of wide range of flow-control team, they provide expert classes and seminars specific experience in industrial applications. advice, solve problems, and to your industry, presented thermoplastics, Chemtrol assist you every step of the at our manufacturing facility, offers dependable products way. or product and application- that work in the most specific seminars conducted demanding environments. Our distributors, sales in the field. Our high-quality professionals, and service product and technical representatives offer ideas, manuals are available on answer questions, and put request, and a full listing of their knowledge to work Chemtrol products is provided for you. on our web site, www.chemtrol.com WARNING: DO NOT USE OR TEST THE PRODUCTS IN THIS CATALOG WITH COMPRESSED AIR OR OTHER GASES. Revision 9/23/2013 2 FAILURE TO FOLLOW THIS WARNING CAN RESULT IN PERSONAL INJURY OR DAMAGE TO PROPERTY.
    [Show full text]
  • Technical Data
    HI·TECH (800) 677-8942 I (303) 680-5159 www.hitechcontrols.con CONTROLS, INC. Click or Call for a Quotel • "Hybrid" Torque Specifications ­ S rint/BSP and Pro-Fit/NPTF --l ......."' 'Hybrid' Torque Specifications - (Sprint - BSP Fittings assembled into female NPTF ports) <au lion: Mating material and female parls may be too soft for high torque values. {heck material hardness to ovoid Slripping, galling or (foss-threading. This table is ONLY a guide for "hybrid" siluatiom; that require inteHhonging thread Iypes to ouommodote tubing requirements. T1wilOO Size MiWn.m ToltpJel'l:U AW:itun IClqJe VWe Sprint N. fl-l.lI$ N. h-lbs 1/8" • 10 0.1 10.0 1.' 1/4" • 4.0 1.9 20.0 14,8 3/8" 27.0 10.0 54.0 40.0 1/2" 27.0 100 67.0 ~O • Hrllll! TOIq1N "loti III rlMll Tbllocf ~III QlIIIlVIll Illhl lorqilt WIlIII for (1lOIIa~OlII1l ~ (ISP Inale II ISP ftlnale). ·Hybrid" TOfque SpecificationS - (Profit - NPTF Fittings assembled into female BSP portS) (llulilln: Mating malelial and female parIs may be too soh for high la/que values. {heck material hardness ra avaid stripping, galling ar Closs·rhleading. This rable is ONLY a guide for "hybrid" silualians lhat require intmhonging rhreod Iypes 10 ouommadare tubing requilemenrs. ihleod Size Miifun ltll~ VIM Moxirun 'onp VtU Sprint N. fl-lbs N. fl-Lbs 1/8" • 0.1 10.0 - I' 1.' w 1/4 • 4.' 1.9 20.0 14.8 3/8" • I.' 3.1 20.0 14.8 1/2" 21.0 20.0 54,0 40.0 c< lit " ,tI,,,,, ," "Il' " .." ....1, ..1 I, ......" ."l.., "",, 179 "MOnO at "j"" ,.
    [Show full text]
  • How to Create an Informed Compliance Publication
    1 What Every Member of the Trade Community Should Know About: Classification and Marking of Pipe Fittings under Heading 7307 Edited for scope by M.E.Dey & Co Inc AN INFORMED COMPLIANCE PUBLICATION JULY 2008 NOTICE: This publication is intended to provide guidance and information to the trade community. It reflects the position on or interpretation of the applicable laws or regulations by U.S. Customs and Border Protection (CBP) as of the date of publication, which is shown on the front cover. It does not in any way replace or supersede those laws or regulations. Only the latest official version of the laws or regulations is authoritative. First Published: July 2008 QUESTIONS TO ASK WHEN CLASSIFYING PIPE AND TUBE FITTINGS ... 2 TUBE OR PIPE FITTINGS OF IRON OR STEEL....................................... 3 PARTS OF GENERAL USE ............................................................................ 4 WHAT IS A PIPE OR TUBE? .......................................................................... 4 IRON AND STEEL DEFINED .......................................................................... 4 SUBHEADING 7307.11.00 THROUGH 7307.19.90.. Cast fittings ................... 5 SUBHEADINGS 7307.21 THROUGH 7307.29. Stainless Steel fittings ........... 6 SUBHEADINGS 7307.91 THROUGH 7307.99... Other ................................... 7 ENTRY REQUIREMENTS ............................................................................. 8 SPECIAL MARKING REQUIREMENTS ........................................................ 9 INTRODUCTION This
    [Show full text]
  • Pipe Joining for Plumbing and Heating Systems
    TM 26 January 2020 JOURNAL OF DESIGN INNOVATION FOR HYDRONIC AND PLUMBING PROFESSIONALS Pipe Joining for Plumbing and Heating Systems TM 5212 Series SinkMixer Scald Protection Point-of-use Mixing Valve • 4-way design simplifies piping and minimizes connection points. • Stand-off mounting bracket for simple sturdy installation. • Patented design, wide flow range to handle a variety of fixtures. • Forged low lead dezincification resistant brass for durability. Controlling and protecting your water www.caleffi.com - Milwaukee, WI USA FROM THE GENERAL MANAGER & CEO Dear Plumbing and Hydronic Professional, It was the 1990s when I attempted my first soldering job. What a mess! Although the replacement water softener ended up working fine, my workmanship was nothing short of “bush league”. There was more solder on the basement floor and on the outside of the pipe, than there was in the completed joint. Fortunately the softener was in my own home. I’ve long since moved on from there but would not be surprised if someday that work is posted up on one of those “hacked-up install” websites! That experience gave me an appreciation for the skill that goes into producing a reliable pipe connection in a timely manner. Fast forwarding to today there are several new pipe joining technologies available that not only produce a reliable connection, but require significantly less time than traditional methods. As skilled labor becomes increasingly scarce, it’s likely that manufacturers will introduce even more innovate “quick-joining” technologies and methods. This issue of idronics discusses classic and contemporary methods of joining piping in hydronic and plumbing applications.
    [Show full text]
  • History of Threaded Pipe Connections
    Jacques Jumeau English version History of technologies linked to heating. Chapter 1 History of threaded pipe connections Copyright: Jacques Jumeau 1st edition 2010/04/23 Copy is allowed, provided you cite the origin: Ultimheat Museum 1 Update 2019/02/21 History of threaded pipe connections At the beginning of the 19th century, the development of pumps and steam engines posed the problem of a simple, solid, waterproof and pressure-resistant connection of metal pipes. Each manufacturer designed their own system and very soon appeared problems of compatibility and maintenance. In 1841 the English engineer and industrialist, Joseph Whitworth, of Manchester, presented to the Institute of Civil Engineers, a memoir to demonstrate the advantage of applying, for railways, navigation and manufactures, a uniform system screw threads, all over England. He gave a table summarizing the main dimensions which were quickly adopted by several companies and builders. Joseph Whitworth focused on determining the pitch, depth, and shape of screw threads to match their diameter. He endeavored to establish such proportions that, while retaining the necessary power of the nets, they present, at the same time, a great solidity, and may serve both for iron and cast iron. It was based on a 55-degree thread angle with rounded roots and crests of threads to save manufacturing tools. This form of threading, was later declined into a cylindrical female part and a conical male part with a taper angle of 1/16 (6.25%) and was then chosen as the most efficient, because it allowed to perform a Pipe sealing on a step.
    [Show full text]
  • JMF Brass Threaded Fittings & Nipples
    JMF Brass Threaded Fittings & Nipples JMF Brass Threaded Fittings and Nipples are preferred by plumbing professionals who demand the highest quality, appearance, fill rates and largest selection. Our Brass Fittings and Nipples are carefully produced and threaded to industry specifications to provide a secure and trusted fit. While primarily developed for carrying water in commercial plumbing and OEM applications, they are also used in oil, gas and steam applications. Durable and highly resistant to rust and corrosion, every brass fitting and nipple is 100% inspected and quality tested. Visit our pricing page at www.jmfcompany.com to view detailed product information on JMF brass threaded fittings and nipples. SYMBOLS FIP: Female Iron Pipe Thread MIP: Male Iron Pipe Thread STANDARDS & SPECIFICATIONS Federal Specifications: • WW-N-351 nipples, pipe and thread • WW-P-351 pipe, red brass Seamless Pipe Size: • WW-P-460 Pipe Fittings: brass and bronze (threaded) WW-U-516 Unions, brass and bronze, threaded pipe connections and solder joint tube connections MATERIALS Military Standard: • MS51846 nipple, pipe, brass • Cast fittings are made from Copper Alloy C89833 which American National: consists of 86%-91% copper, 0.09% lead, 6% tin, and 6% zinc per • ANSI A12.18.1 finished and rough brass ASTM specification B62. Plumbing Fixtures (Standards Institute) • Brass nipples are seamless red brass pipe • ANSI B1.1 unified inch screw threads (UN & UNR) (Copper Alloy 230) • ANSI B1.20.1 pipe threads general purpose (inch) • ANSI B1.20.1 dry seal pipe
    [Show full text]
  • Western Riverside County Regional Wastewater Authority
    Western Riverside County Regional Wastewater Authority 14 MGD Plant Expansion - Volume IIB September 2014 For Bidding Purposes Only WESTERN RIVERSIDE COUNTY REGIONAL WASTEWATER AUTHORITY 14.0 MGD PLANT EXPANSION VOLUME IIB Technical Specifications Section # of Pages SECTION 00020 – CONTRACT DOCUMENTS TABLE OF CONTENTS TECHNICAL SPECIFICATIONS – VOLUME II-B DIVISION 22 – PLUMBING 220050 General Pipes and Fittings ................................................................................................ 11 220513 Common Motor Requirements for Equipment ................................................................... 7 220517 Sleeves and Sleeve Seals for Piping ................................................................................... 2 220518 Escutcheons for Piping ....................................................................................................... 2 220519 Meters and Gages ................................................................................................................ 3 220523 Valves ............................................................................................................................... 11 220529 Hangers and Supports for Piping and Equipment ............................................................... 8 220553 Identification for Piping and Equipment ............................................................................. 4 220719 Piping Insulation ................................................................................................................
    [Show full text]
  • Definition of Pipe Thread Acronyms National Pipe Thread Taper (NPT) Is a U.S
    Pipe Thread Definitions Checking thread type can be done with a thread gauge. Thread types can also be specified on existing pipe labels, manufacturer specifications or on manufacturer drawings. The specified sealant tape or paste should be used when required for installation. Definition of Pipe Thread Acronyms National Pipe Thread Taper (NPT) is a U.S. standard for tapered NPT National Pipe Thread (tapered) threads on threaded pipes and fittings. In contrast to straight threads, a taper thread will be tighter and have a fluid/air-tight seal . FPT is a term for pipe fittings that MIP (male iron pipe) or MNPT (male Female Pipe Thread FPT national pipe thread) fittings fit into. Female threads are internal located (interchangeable with NPT) inside of the pipe or fitting. Female Iron Pipe (interchangeable FIP, Female Iron Pipe, or Female International Pipe- Similar to FPT, FIP FIP with NPT) connect NPT pipe together with internal threads. National pipe thread connection to an FPT (Female Pipe Thread) or Male Pipe Thread (interchangeable MPT equivalently an FIP (Female Iron Pipe). MPT the threads are located on the with NPT) outside of the pipe or fitting. Male Iron Pipe (interchangeable MIP Male Iron Pipe, a threaded pipe or fitting connection to an FIP or FPT fitting. with NPT) PTF SAE short taper pipe thread SAE Short is mainly used in low pressure pneumatic and fuel applications. National Pipe Thread Fine National Pipe Thread Fine– also called Dry seal American National Standard (American National taper pipe NPTF Taper Pipe Thread is designed to provide a more leak-free seal without the thread for dry seal pressure tight use of Teflon tape or other sealant compound.
    [Show full text]
  • Progress Report of the National Screw Thread Commission
    DEPARTMENT OF COMMERCE BUREAU OF STANDARDS S. W. STSATTON, Duticrot PROGRESS REPORT OF THE NATIONAL SCREW THREAD COMMISSION (AUTHORIZED BY CONGRESS, JULY 18, 1918, H. R. 10852) AS APPROVED JUNE 19, 1920 JANUARY 4, 1921 MISCELLANEOUS PUBLICATIONS OF THE BUREAU OF STANDARDS No. 42 WASHINGTON «OVIRNMENT PRINTING OFFICE - . - NATIONAL SCREW THREAD COMMISSION, WASHINGTON, June ig, 1920. The accompanying Progress Report of the National Screw Thread Commission has been approved by the Commission, and by the Secretaries of War, Navy, and Commerce, in accordance with the provisions of the law establishing the Commission. APPROVAL BY THE MEMBERS OF THE COMMISSION. The Progress Report of the National Screw Thread Commission, as revised in accordance with the vote of November 23-24, 1919, and embodying certain changes recommended by a special committee of the Society of Automotive Engineers, is hereby approved. S. W. Stratton, Chairman. B. C. Peck, J. O. Johnson, Representing the United States Army. N. H. Wright, P. M. McNair, Representing the United States Navy. James Hart'ness, F. O. Wells, Nominated by the American Society of Mechanical Engineers. E. H. Ehrman, H. T. Herr, Nominated by the Society of Automotive Engineers. approval by the secretaries of war, navy, and commerce. The attached report prepared by the National Screw Thread Com- mission, in accordance with the law establishing the Commission (Public doc. No. 201, 65th Cong., H. R. 10852), is hereby accepted and approved. Newton D. Baker, Secretary of War. Josephus Daniels, Secretary of the Navy. Joshua W. Alexander, Secretary of Commerce. 35455°—21 WASHINGTON : GOVERNMENT PRINTING OFFICE : 1921 DEPARTMENT OF COMMERCE BUREAU OF STANDARDS S.
    [Show full text]
  • Thread/Screw
    THREAD/SCREW - Drill & Tap Chart Tap Drills Clearance Hole Drills Machine Screw Alum, Brass, Stainless Steel, All Materials Size & Plasitcs Steels & Iron Threads Minor Close Fit Free Fit Per Inch Dia 75% Thread 50% Thread Major Drill Decimal Drill Decimal Drill Decimal Drill Decimal # or Dia Dia Size Equiv. Size Equiv. Size Equiv. Size Equiv. 0 .0600 80 .0447 3/64 .0469 55 .0520 52 .0635 50 .0700 64 .0538 53 .0595 1/16 .0625 1 .0730 48 .0760 46 .0810 72 .0560 53 .0595 52 .0635 56 .0641 50 .0700 49 .0730 2 .0860 43 .0890 41 .0960 64 .0668 50 .0700 48 .0760 48 .0734 47 .0785 44 .0860 3 .0990 37 .1040 35 .1100 56 .0771 45 .0820 43 .0890 40 .0813 43 .0890 41 .0960 4 .1120 32 .1160 30 .1285 48 .0864 42 .0935 40 .0980 40 .0943 38 .1015 7/64 .1094 5 .125 30 .1285 29 .1360 44 .0971 37 .1040 35 .1100 32 .0997 36 .1065 32 .1160 6 .138 27 .1440 25 .1495 40 .1073 33 .1130 31 .1200 32 .1257 29 .1360 27 .1440 8 .1640 18 .1695 16 .1770 36 .1299 29 .1360 26 .1470 24 .1389 25 .1495 20 .1610 10 .1900 9 .1960 7 .2010 32 .1517 21 .1590 18 .1695 24 .1649 16 .1770 12 .1890 12 .2160 28 .1722 14 .1820 10 .1935 2 .2210 1 .2280 32 .1777 13 .1850 9 .1960 20 .1887 7 .2010 7/32 .2188 1/4 .2500 28 .2062 3 .2130 1 .2280 F .2570 H .2660 32 .2117 7/32 .2188 1 .2280 18 .2443 F .2570 J .2770 5/16 .3125 24 .2614 I .2720 9/32 .2812 P .3230 Q .3320 32 .2742 9/32 .2812 L .2900 16 .2983 5/16 .3125 Q .3320 3/8 .3750 24 .3239 Q .3320 S .3480 W .3860 X .3970 32 .3367 11/32 .3438 T .3580 14 .3499 U .3680 25/64 .3906 7/16 .4375 20 .3762 25/64 .3906 13/32 .4062 29/64 .4531 15/32
    [Show full text]
  • Pipe Threading and Testing
    TRADE OF Pipefitting PHASE 2 Module 3 Pipe Processes UNIT: 6 Pipe Threading and Testing In cooperation with subject matter expert: Finbar Smith © SOLAS 2014 Module 3– Unit 6 Pipe Threading & Testing Table of Contents Unit Objective ........................................................................................................... 1 Learning Outcome .................................................................................................... 2 1.0 Pipe Thread Types and Designations ..................................................... 3 1.1 Introduction to Pipe Threads ................................................................... 3 1.2 Types of Pipe Threads............................................................................... 3 1.3 British Standard Pipe (BSP) Thread ........................................................ 4 1.4 National Pipe Thread (NPT) .................................................................... 4 1.5 Sealing a Tapered Thread .......................................................................... 5 2.0 Pipe Threading Equipment ...................................................................... 6 2.1 Hand Held Threading Handle .................................................................. 6 2.2 Threading Dies ........................................................................................... 7 2.3 Hand Held Threading Machine ............................................................... 7 2.4 Threading Machine ...................................................................................
    [Show full text]