ASME B1.20.2M-2006 一般用途用60℃管螺纹

Pipe Threads, 60 deg, General Purpose A N A M E R I C A N N A T I O N A L S T A N D A R D ASME B1.20.2M-2006 --`,````,,,`,``,`,`````,`,,`,,,-`-`,,`,,`,`,,`--- ASME B1.20.2M-2006 Pipe Threads, 60 deg, General Purpose A N AM E R I C A N N AT I O N A L S TA N D A R D Three Park Avenue • New York, NY 10016 - - ` , ` ` ` ` , , , ` , ` ` , ` , ` ` ` ` ` , ` , , ` , , , - ` - ` , , ` , , ` , ` , , ` - - - Date of Issuance: June 15, 2007 This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda or written interpretations of the requirements of this Standard issued to this edition. Periodically, certain actions of the ASME B1 Committee may be published as Cases. Cases are published on the ASME Web site under the Committee Pages at http://cstools.asme.org as they are issued. ASME is the registered trademark of The American Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large. ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990 Copyright © 2007 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All rights reserved Printed in U.S.A. --`,````,,,`,``,`,`````,`,,`,,,-`-`,,`,,`,`,,`--- CONTENTS Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv Committee Roster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Correspondence With the B1 Committee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Reference and Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 Taper Pipe Thread Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 Specifications for General Purpose Taper Pipe Threads, NPT . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Specifications for Internal Parallel Threads in Pipe Couplings, NPSC. . . . . . . . . . . . . . . . . . . . 8 6 Gauges and Gauge Tolerances for Standard Pipe Thread, NPT . . . . . . . . . . . . . . . . . . . . . . . . . . 8 7 Gauging of Taper Pipe Thread, NPT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 Gauging of NPSC Parallel Pipe Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figures 1 Standard Taper Pipe Thread Notation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Basic Profile of Standard Taper Pipe Thread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Standard Taper Pipe Threads for Pressure-Tight Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 NPT Standard Taper Pipe Thread Plug and Ring Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 Suggested Form of Gauge Thread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6 Gauging External Taper Threads With Ring Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 Gauging Internal Taper Threads With Plug Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 Gauging of Chamfered Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Tables 1 Limits on Crest and Root Truncation of Standard External and Internal Taper Pipe Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Basic Thread Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Tolerances on Taper, Lead, and Angle of Pipe Threads, NPT . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Dimensions, Internal Parallel Threads in Pipe Couplings, NPSC . . . . . . . . . . . . . . . . . . . . . 9 5 Basic Dimensions of Plug and Ring Gauges for NPT Threads . . . . . . . . . . . . . . . . . . . . . . . 13 6 Tolerances for NPT Working Plug and Ring Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 Diameter Equivalent of Variation in Lead for Tools and Gauges . . . . . . . . . . . . . . . . . . . . . 16 8 Diameter Equivalent of Variation in Half Included Angle of Thread for Tools and Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Nonmandatory Appendices A The Turns of Engagement Method of Verifying Product Threads . . . . . . . . . . . . . . . . . . . . 19 B Tap Drill Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 iii - - ` , ` ` ` ` , , , ` , ` ` , ` , ` ` ` ` ` , ` , , ` , , , - ` - ` , , ` , , ` , ` , , ` - - - FOREWORD This Standard is a metric conversion of the data for NPT inch series taper pipe threads and NPSC inch series straight internal pipe threads. The NPT and NPSC inch threads are included in ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch). Threads and gages delineated herein are interchangeable with those in ANSI/ASME B1.20.1. Tabulated metric values have been converted from values in ANSI/ASME B1.20.1 and rounded in accordance with ASME B1.30, Screw Threads: Standard Practice for Calculating and Rounding Dimensions. Values are given in millimeters. When compared to values calculated from formulas in this Standard, there may be a difference in the last decimal place but this will not affect interchangeability. The ASME B1 Subcommittee 20 prepared this metric Standard in order to encourage global use of the NPT Pipe Thread. For ease of use, both product threads and gauging are contained in this one Standard. Nonmandatory Appendices A and B are informative only and are not considered a part of this Standard. ASME B1.20.2M was approved by the American National Standards Institute on December 21, 2006. iv - - ` , ` ` ` ` , , , ` , ` ` , ` , ` ` ` ` ` , ` , , ` , , , - ` - ` , , ` , , ` , ` , , ` - - - ASME B1 COMMITTEE Standardization and Unification of Screw Threads (The following is the roster of the Committee at the time of approval of this Standard.) STANDARDS COMMITTEE OFFICERS A. L. Barrows, Chair D. S. George, Vice Chair A. L. Guzman, Secretary STANDARDS COMMITTEE PERSONNEL A. L. Barrows, Kennametal–IPG F. G. Calderone, Corresponding Member, Quality Systems Implementers R. Dodge, Pennoyer-Dodge Co. D. Everett, National Institute of Standards and Technology G. A. Flannery, Corresponding Member, Mercury Gage Co. H. N. Frost, Defense Supply Center Philadelphia J. O. Gehret III, Vermont Thread Gage D. S. George, Ford Motor Co. J. R. Gervasi, Kerr Lakeside, Inc. J. Greenslade, Greenslade and Co. L. C. Borowski, Alternate, Greenslade and Co. A. L. Guzman, The American Society of Mechanical Engineers R. J. Hukari, SPS Technologies L. C. Johnson, The Johnson Gage Co. D. D. Katz, Precision Fittings R. P. Knittel, Leitech-US Ltd. P. A. Larouche, Swanson Tool Manufacturing Co. SUBCOMMITTEE 20 — PIPE THREADS D. D. Katz, Chair, Precision Fittings K. Bly, Hemco Gages M. Hop, Alternate, Hemco Gages F. G. Calderone, Corresponding Member, Quality Systems Implementer J. A. Casner, Corresponding Member, Casner Engineering Services M. Cox, Corresponding Member, Frank J. Cox Sales, Ltd. R. Dodge, Pennoyer-Dodge Co. G. A. Flannery, Corresponding Member, Mercury Gage Co. D. D. Gajdosik, Besly Products Corp. J. O. Gehret III, Vermont Thread Gage J. R. Gervasi, Kerr Lakeside, Inc. J. A. Gruber, Wheatland Tube Co. L. C. Johnson, The Johnson Gage Co. v B. Larzelere, Corresponding Member, Deltronic Corp. L. L. Lord, Corresponding Member, Caterpillar, Inc. M. H. McWilliams, PMC Lonestar D. Miskinis, Kennametal–IPG W. R. Newman, Corresponding Member, Consultant D. R. Oas, Seaway Bolt and Specials Corp. M. W. Rose, Glastonbury Southern Gage W. A. Watts, Alternate, Glastonbury Southern Gage E. Schwartz, Consultant R. H. Searr, Member Emeritus, Mak Tool and Gage B. F. Sheffler, Dresser-Rand Co. A. D. Shepherd, Jr., Emuge Corp. D. Skierski, Sterling Gage and Calibration LLC R. D. Strong, General Motors Corp. A. F. Thibodeau, Member Emeritus, Swanson Tool Manufacturing Co. R. E. Vincent, Jr., General Plug Manufacturing Co. C. J. Wilson, Industrial Fasteners Institute R. P. Knittel, Leitech–US Ltd. P. A. Larouche, Swanson Tool Manufacturing Co. B. Larzelere, Corresponding Member, Deltronic Corp. M. H. McWilliams, PMC Lone Star D. R. Maisch, Alternate, PMC Lone Star D. R. Oas, Seaway Bolt and Specials Corp. J. R. Popovic, Cleveland Specialty Inspection Services M. W. Rose, Glastonbury Southern Gage R. H. Searr, Corresponding Member, Consultant A. D. Shepherd, Jr., Emuge Corp. D. Skierski, Sterling Gage and Calibration LLC A. F. Thibodeau, Corresponding Member, Swanson Tool Manufacturing Co. R. E. Vincent, Jr., General Plug Manufacturing Co. - - ` , ` ` ` ` , , , ` , ` ` , ` , ` ` ` ` ` , ` , , ` , , , - ` - ` , , ` , , ` , ` , , ` - - - CORRESPONDENCE WITH THE B1 COMMITTEE General. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may interact with the Committee by requesting interpretations, proposing revisions, and attending Committee meetings. Corre- spondence should be addressed to: Secretary, B1 Standards Committee The American Society of Mechanical Engineers Three Park Avenue New York, NY 10016-5990 Proposing Revisions. Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard. Approved revisions will be published periodically. The Committee welcomes proposals for revisions to this Standard. Such proposals should be as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed description of the reasons for the proposal, including any pertinent documentation. Proposing a Case. Cases may be issued for the purpose of providing alternative rules when justified, to permit early implementation of an approved revision when the need is urgent, or to provide rules not covered by existing provisions. Cases are effective immediately upon ASME approval and shall be posted on the ASME Committee Web page. Requests for Cases shall provide a Statement of Need and Background Information. The request should identify the standard, the paragraph, figure or table number(s), and be written as a Question and Reply in the same format as existing Cases. Requests for Cases should also indicate the applicable edition(s) of the standard to which the proposed Case applies. Attending Committee Meetings. The B1 Standards Committee regularly holds meetings, which are open to the public. Persons wishing to attend any meeting should contact the Secretary of the B1 Standards Committee. vi - - ` , ` ` ` ` , , , ` , ` ` , ` , ` ` ` ` ` , ` , , ` , , , - ` - ` , , ` , , ` , ` , , ` - - - ASME B1.20.2M-2006 PIPE THREADS, 60 deg, GENERAL PURPOSE 1 SCOPE This Standard specifies the designations, dimensions, and tolerances and establishes a verification system for 60 deg included angle pipe threads. It is applicable for general purpose pipe and fitting connections. Where pressure-tight joints are required, it is intended that taper pipe threads conforming to this Standard be made up wrench-tight with a sealant. To prevent galling on certain piping materials such as stainless steel, the seal- ant should contain a lubricant. Internal parallel (straight) pipe threads, series NPSC, are used with external taper pipe threads, series NPT. Internal taper pipe threads, series NPT, are used with external taper pipe threads, series NPT. 2 REFERENCE AND SYMBOLS 2.1 Reference Standard The following publication is referenced in this Stan- dard. The latest edition shall apply. ASME B1.20.1, Pipe Threads, General Purpose (Inch) Publisher: The American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5900; Order Department: 22 Law Drive, P.O. Box 2300, Fairfield, NJ 07007-2300 2.2 Symbols The following symbols are used (see Fig. 1): D p outside diameter of pipe E0 p basic pitch diameter at small end of external thread (or end of pipe) E1 p basic pitch diameter at plane of hand-tight engagement length (L1), external thread, large end of internal thread E2 p basic pitch diameter at plane of effective thread length (L2), external thread E3 p basic pitch diameter at plane of wrench-tight engagement E5 p basic pitch diameter at L5 K0 p basic minor diameter at small end of external thread (or end of pipe) L1 p length of hand-tight engagement between internal and external threads L2 p length of effective thread, external thread L3 p length of thread beyond L1 allowing wrench-tight engagement, internal thread; also wrench makeup 1 L4 p overall length of thread, including vanish thread, external thread L5 p length of complete threads, external thread V p vanish thread(s), allowance for chamfer on tool- ing or other process of thread production 3 TAPER PIPE THREAD FORM 3.1 Thread Profile The form of thread profile specified in this Standard shall be known as the Standard Taper Pipe Thread Form. The relations as specified herein for form of thread and general notation are shown in Fig. 2. 3.2 Angle of Thread The angle between the sides of the thread is 60 deg when measured in an axial plane. The line bisecting this angle is perpendicular to the axis. 3.3 Truncation and Thread Height The height, H, of the sharp V thread is H p 0,866025P where P p pitch of thread The basic maximum height of the truncated thread, h, (see Fig. 2) is based on factors entering into the manufac- ture of cutting tools and the making of tight joints. Maximum h p 0,800000P The crest and root of pipe threads are truncated a minimum of 0,033000P. The maximum depth of trunca- tion for the crest and root of these pipe threads will be found in Table 1. The crest and roots of external and internal threads may be truncated either parallel to the pitch line or parallel to the axis. The illustration in Fig. 2, giving a sectional view of this standard thread form, represents the truncated thread form by a straight line. However, when closely examined, the crests and roots of commercially manufac- tured pipe threads appear slightly rounded. When crests and roots of threading tools or chasers lie within the limits shown in Table 1, the pipe threads of products produced by such means are acceptable on the basis of in-process control. - - ` , ` ` ` ` , , , ` , ` ` , ` , ` ` ` ` ` , ` , , ` , , , - ` - ` , , ` , , ` , ` , , ` - - - ASME B1.20.2M-2006 Fig. 1 Standard Taper Pipe Thread Notation D P la n e o f w re n ch m ak eu p R ef er en ce p la n e ze ro P la n e o f h an d -t ig h t e n g ag em en t P la n e o f co m p le te t h re ad le n g th P la n e o f ef fe ct iv e th re ad le n g th P la n e o f va n is h p o in t L5 L3 L1 Wrench makeup Length external thread E3 E0 E5E1 E2 V 2P K0 L4 L2 2 - - ` , ` ` ` ` , , , ` , ` ` , ` , ` ` ` ` ` , ` , , ` , , , - ` - ` , , ` , , ` , ` , , ` - - - ASME B1.20.2M-2006 Fig. 2 Basic Profile of Standard Taper Pipe Thread 90 deg90 deg 90 deg 90 deg 90 deg 60 deg H h P � � � �� � Crest Root Axis Fr fr Fc fc Fc fc fr Fr � Crest Root Internal ThreadExternal Thread where Fc p width of flat at crest Fr p width of flat at root fc p depth of truncation at crest fr p depth of truncation at root H p 0,866025P p height of 60 deg sharp V thread h p 0,800000P p height of thread on product n p number of threads per 25,4 mm P p 25,4/n p pitch (measured parallel to axis) � p 30 deg p thread flank angle � p 1° 47′ p thread taper per side GENERAL NOTE: For a symmetrical parallel screw thread, H p 25,4 (cot �)/2n. For a symmetrical taper screw thread, the exact value for Standard taper pipe thread is H p 0,865743P. For a 3,175 mm pitch thread, which is the coarsest standard taper pipe thread pitch, the corresponding values of H are 2,74873 and 2,74963, the difference being 0,00090 mm. This difference being too small to be significant, the value of H p 0,866025P continues in use for threads of 1⁄16 taper on the diameter. 3 - - ` , ` ` ` ` , , , ` , ` ` , ` , ` ` ` ` ` , ` , , ` , , , - ` - ` , , ` , , ` , ` , , ` - - - ASME B1.20.2M-2006 Ta bl e 1 Li m it s on Cr es t an d Ro ot Tr un ca ti on of S ta nd ar d Ex te rn al an d In te rn al Ta pe r Pi pe Th re ad s C re st R o o t C re st In te rn al T h re ad E xt er n al T h re ad M in im u m t ru n ca ti o n M ax im u m t ru n ca ti o n M in im u m t ru n ca ti o n M in im u m t ru n ca ti o n M ax im u m t ru n ca ti o n M ax im u m t ru n ca ti o n h , m ax . H M in im u m t ru n ca ti o n M ax im u m t ru n ca ti o n R o o t C re st H ei gh t of H ei gh t N um be r S ha rp V Tr un ca ti on , f Eq ui va le nt W id th of Fl at , F of Th re ad , of Th re ad s, Th re ad , h, m m M in im um M ax im um To le ra nc e M in im um M ax im um To le ra nc e n, H , pe r 25 ,4 m m m m M ax . M in . Fo rm ul a m m Fo rm ul a m m m m Fo rm ul a m m Fo rm ul a m m m m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 27 0, 81 48 3 0, 75 3 0, 63 4 0, 03 3P 0, 03 0 0, 09 6P 0, 09 1 0, 06 1 0, 03 8P 0, 03 6 0, 11 1P 0, 10 4 0, 06 8 18 1, 22 19 9 1, 12 9 0, 97 4 0, 03 3P 0, 04 6 0, 08 8P 0, 12 4 0, 07 9 0, 03 8P 0, 05 3 0, 10 2P 0, 14 5 0, 09 2 14 1, 57 12 4 1, 45 1 1, 28 8 0, 03 3P