1、Nomenclature forInstrument Tube FittingsApproved 12 November 2001ISARP42.00.01-2001RECOMMENDED PRACTICEISA The Instrumentation,Systems, andAutomation Society TMISA-RP42.00.01-2001Nomenclature for Instrument Tube FittingsISBN: 1-55617-784-4Copyright 2002 by the Instrumentation, Systems, and Automatio
2、n Society. All rights reserved. Not forresale. Printed in the United States of America. No part of this publication may be reproduced, stored ina retrieval system, or transmitted in any form or by any means (electronic mechanical, photocopying,recording, or otherwise), without the prior written perm
3、ission of the Publisher.ISA67 Alexander DriveP.O. Box 12277Research Triangle Park, North Carolina 27709USA 3 ISARP42.00.012001PrefaceThis preface, as well as all footnotes and annexes, is included for information purposes and is not part ofISA-RP42.00.01-2001.The standards referenced within this doc
4、ument may contain provisions which, through reference in thistext, constitute requirements of this document. At the time of publication, the editions indicated werevalid. All standards are subject to revision, and parties to agreements based on this document areencouraged to investigate the possibil
5、ity of applying the most recent editions of the standards indicatedwithin this document. Members of IEC and ISO maintain registers of currently valid InternationalStandards. ANSI maintain registers of currently valid U.S. National Standards.This document has been prepared as part of the service of I
6、SAThe Instrumentation, Systems, andAutomation Society, toward a goal of uniformity in the field of instrumentation. To be of real value, thisdocument should not be static but should be subject to periodic review. Toward this end, the Societywelcomes all comments and criticisms and asks that they be
7、addressed to the Secretary, Standards andPractices Board; ISA; 67 Alexander Drive; P. O. Box 12277; Research Triangle Park, NC 27709;Telephone (919) 549-8411; Fax (919) 549-8288; E-mail: standardsisa.org.The ISA Standards and Practices Department is aware of the growing need for attention to the met
8、ricsystem of units in general, and the International System of Units (SI) in particular, in the preparation ofinstrumentation standards. The Department is further aware of the benefits to USA users of ISAstandards of incorporating suitable references to the SI (and the metric system) in their busine
9、ss andprofessional dealings with other countries. Toward this end, this Department will endeavor to introduceSI-acceptable metric units in all new and revised standards, recommended practices, and technicalreports to the greatest extent possible. Standard for Use of the International System of Units
10、 (SI): TheModern Metric System, published by the American Society for Testing b) permits better communications between manufacturer, vendor, purchaser, and ultimate user;c) provides standardized nomenclature to be used by drafting, billing, purchasing, and stores groups;andd) makes more clear the us
11、e of standardized symbols.3 Definitions3.1 bored through:a fitting that has the “shoulder” or “tube stop” of the fitting removed.3.2 branch:the connection of a fitting tee that is in a 90 relation to the other two connections.3.3 bulkhead:a partition, panel, or bracket through which a fitting is ins
12、talled.3.3.1 bulkhead fitting:a fitting designed with a body, hex, extended threading, and a bulkhead locknut (jam nut) between portsthat allows the fitting to be inserted through and secured to a bulkhead.3.4 compression (fitting):a fitting that achieves a seal without the necessity of flaring the
13、end of the tubing.3.5 ferrule:a tube fitting component that provides the sealing and/or holding function of the flareless fitting on thetubing.3.6 flared (fitting):a fitting assembly consisting of a body, nut, and sleeve that is designed to seal by mechanically matingthe cone or angular sealing surf
14、ace area of the body with a similar angular (typically 37 ) surface on theinner diameter of the tube end.3.7 flareless (fitting):a type of compression fitting assembly consisting of a body, nut, and ferrule(s) that is mechanicallyattached to the outside diameter of the tube, to hold and seal the tub
15、e and mating section of the fittingbody.ISARP42.00.012001 10 3.8 port:a fitting assembly connection.3.9 run:that portion of a fitting assembly having two ports on the same axis.3.10 sleeve:a flared fitting component that provides support from the nut shoulder to the flared tube end.3.11 tube fitting
16、:a mechanical device attached to the end of a tube used in the assembly of a tubing system.4 SpecificationsCAUTION USER SHOULD APPLY FACTORY SPECIFICATION FOR THE PROPER APPLICATIONOF FITTINGS.4.1 Standardized nomenclatureA commonly used tube fitting should be specified with the following:a) Common
17、name (see clause 5)b) Fitting materialc) Tube outside diameterd) Pipe thread, if applicablee) Flared or flarelessNOTE 1 For abbreviations used on text or drawings, see ASME Y14.38-1999.NOTE 2 For SI letter symbols used on text, see ANSI/IEEE 260.1-1993 and ISO 1000; for drawings requiring capitaliza
18、tion, seeASME Y14.38-1999.NOTE 3 The symbol x is commonly used between connection size callouts.EXCEPTION: Special tube fittings not covered by this Recommended Practice, including fittings withcoincident inch (customary U.S. units) and millimeter (SI units) connection sizes, should be specified asp
19、rovided in manufacturers pertinent data.4.2 Fractional unit dimensionsWhen (fractional) inch tubing sizes are in use, the specifications should use (fractional) inch dimensions.NOTE 1 For National Standard Pipe Taper (NPT) male or female threads, see ANSI/ASME B1.20.1-1983.NOTE 2 American National S
20、tandard Dryseal Pipe Threads (NPTF) male or female threads, see ANSI/ASME B1.20.3-1976. 11 ISARP42.00.012001EXAMPLES:MALE CONNECTOR, STAINLESS STEEL, 1/4 IN. OD X 1/4 IN. NPT, FLARELESS (See 5.1) (Asused on drawing.)FEMALE CONNECTOR, BRASS, 1/2 IN. OD X 1/2 IN. NPTF, FLARED (See 5.2) (As used ondraw
21、ing.)4.3 SI unit dimensionsWhen SI unit tubing sizes are used, the specifications should use SI unit dimensions.NOTE 1 For pressure tight joints SI unit pipe taper male or female threads, see ISO 7, Pt 1-94.NOTE 2 For non-pressure tight joints SI unit pipe parallel male or female parallel threads, s
22、ee ISO 228, Pt 1-94.EXAMPLES:male connector, brass, 6 mm od x ISO 7-R 1/4 in., flareless (See 5.1) (As used in lower case text.)male connector, brass, 12 mm od x ISO 7-R 1/2 in., flareless (See 5.1) (As used in lower case text.)4.4 Tee/cross specificationThe ports for each tee or cross tube fitting
23、(see 5.8 through 5.13) should be specified in the orderindicated by the port numbers as noted adjacent to the detailed symbol.EXAMPLES:male run tee, brass, 1/4 in. od x 1/4 in. npt x 1/4 in. od, flareless (See 5.9) (As used in lower casetext.)FEMALE BRANCH TEE, STAINLESS STEEL, 12 MM OD X 12 MM OD X
24、 ISO 7-1/2 IN. FLARELESS(See 5.12) (As used on drawing.)4.5 AbbreviationsAbbreviations not appearing in ASME Y14.38-1999 should be defined in the document in which theyappear.4.6 Additional featuresAdditional design features may be specified.EXAMPLE:MALE CONNECTOR, STAINLESS STEEL, 1/4 IN. OD X 1/4
25、NPT, FLARELESS, BORED THROUGH(See 5.1) (As used on drawing.)ISARP42.00.012001 12 5 FittingsNOTE Detailed symbols are shown to illustrate the common name tube fittings.Common Name Detailed Symbol5.1 Male Connector5.2 Female Connector5.3 Male Elbow5.4 Female Elbow 13 ISARP42.00.0120015.5 Union Elbow5.
26、6 Tubing Union5.7 Bulkhead Union5.8 Union TeeISARP42.00.012001 14 5.9 Male Run Tee5.10 Male Branch Tee5.11 Female Run Tee 15 ISARP42.00.0120015.12 Female Branch Tee5.13 Union Cross5.14 Bulkhead Male Connector5.15 Bulkhead Female ConnectorISARP42.00.012001 16 5.16 Reducing Union5.17 Tube End Male Ada
27、pter5.18 Tube End Female Adapter5.19 Tubing Cap5.20 Plug5.21 Tube End Reducer 17 ISARP42.00.0120015.22 Tube Port Connector5.23 Tube End Bulkhead ReducerThis page intentionally left blank. 19 ISARP42.00.01Annex A ReferencesThis annex is included for information purposes and is not part of this recomm
28、ended practice.The following standards contain provisions that, through reference in this text, constitute provisions of thisISA Recommended Practice. At the time of publication, the editions indicated were valid. All standardsare subject to revision, and parties to agreements based on this Recommen
29、ded Practice are encouragedto investigate the possibility of applying the most recent editions of the standards indicated below.AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)ANSI/ASME B1.20.1-1983 Pipe Threads, General Purpose (Inch)(Revision and Redesignation of ANSI/ASME B2.1-1968 R 2001)ANSI/ASM
30、E B1.20.3-1976 Dryseal Pipe Threads (Inch)(Revision and Redesignation of ANSI/ASME B2.2-1968 R 1998)ASME Y14.38-1999 Abbreviations and Acronyms (Revision and Redesignation of ASMEY1.1-1989)Available from: ASME22 Law Dr.P.O. Box 2900Fairfield, NJ 07007-2900Tel: (800) 843-2763www.asme.org www.ansi.org
31、INSTITUTE OF ELECTRICAL AND ELECTRONIC ENGINEERS (IEEE)ANSI/IEEE 260.1-1993 American National Standard Letter Symbols for Units of Measurement(SI Units, Customary Inch-Pound Units, and Certain Other Units)IEEE/ASTM SI 10-1997 Standard for Use of the International System of Units (SI): The ModernMetr
32、ic SystemAvailable from: Institute of Electrical and Electronic Engineers445 Hoes LaneP.O. Box 1331Piscataway, NJ 08855-1331Tel: (732) 981-0060www.ieee.org INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)ISO 7, Pt 1-94 Pipe Threads Where Pressure Tight Joints are Made on Threads -Part 1: Dimensi
33、ons, Tolerances and Designation (3rd ed.)ISO 228, Pt 1-94 Pipe Threads Where Pressure Tight Joints are Not Made on Threads -Part 1: Dimensions, Tolerances and Designation (3rd ed.)ISARP42.00.012001 20 ISO 1000, 1992 SI Units and Recommendations for the Use of Their Multiples and ofAmendment 1 - 1998
34、 Certain Other Units (3rded.)Available from: ISOc/o ANSI25 W. 43rdSt.Fourth FloorNew York, NY 10036Tel: (212) 642-4900www.ansi.org Developing and promulgating sound consensus standards, recommended practices, and technicalreports is one of ISAs primary goals. To achieve this goal the Standards and P
35、ractices Departmentrelies on the technical expertise and efforts of volunteer committee members, chairmen and reviewers.ISA is an American National Standards Institute (ANSI) accredited organization. ISA administers UnitedStates Technical Advisory Groups (USTAGs) and provides secretariat support for
36、 InternationalElectrotechnical Commission (IEC) and International Organization for Standardization (ISO) committeesthat develop process measurement and control standards. To obtain additional information on theSocietys standards program, please write:ISAAttn: Standards Department67 Alexander DriveP.O. Box 12277Research Triangle Park, NC 27709ISBN: 1-55617-784-4
