1、Repair of Pressure Equipment and PipingASME PCC-22006AN AMERICAN NATIONAL STANDARDCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME PCC-22006Repair ofPressureEquipment andPipingAN AMERICAN NATI
2、ONAL STANDARDThree Park Avenue New York, NY 10016Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance: January 15, 2007The next edition of this Standard is scheduled for publication in
3、 2007. There will be no addenda orwritten interpretations of the requirements of this Standard issued to this edition.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
4、NationalStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an opportuni
5、ty 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 conn
6、ection with anyitems mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expresslyadvised that determination of the validity of any
7、 such patent rights, and the risk of infringement of such rights, isentirely their own responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibi
8、lity for only those interpretations of this document issued in accordance with the establishedASME 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
9、 prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2007 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASME Not f
10、or ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENTSForeword ivPreparation of Technical Inquiries vCommittee Roster . viPart 1 Scope, Organization, and Intent . 1Part 2 Welded Repairs . 4Article 2.1 Butt-Welded Insert Plates in Pressure Components 4Article 2.2 Exter
11、nal Weld Overlay to Repair Methods for Internal Thinning . 10Article 2.3 Seal-Welded Threaded Connections and Seal Weld Repairs 16Article 2.4 Welded Leak Box Repair . 18Article 2.5 Welded Lip Seals (in the course of preparation) . 22Article 2.6 Full Encirclement Steel Reinforcing Sleeves for Piping
12、. 23Article 2.7 Repair Method Using Fillet Welded Lap Patches With Reinforcing PlugWelds (in the course of preparation) 29Part 3 Mechanical Repairs . 30Article 3.1 Replacement of Pressure Components 30Article 3.2 Freeze Plugs . 32Article 3.3 Damaged Threads in Tapped Holes . 37Article 3.4 Flaw Excav
13、ation and Weld Repair 47Article 3.5 Flange Refinishing . 54Article 3.6 Mechanical Clamp Repair 57Article 3.7 Pipe Straightening or Alignment Bending . 61Article 3.8 Damaged Anchors in Concrete . 64Article 3.9 Valves With Pressure-Seal-Type Bonnets (in the course of preparation) . 73Article 3.10 Hot
14、Bolting (in the course of preparation) 74Part 4 Nonmetallic and Bonded Repairs 75Article 4.1 Nonmetallic Composite Repair Systems for Piping and Pipework:High-Risk Applications 75Article 4.2 Nonmetallic Composite Repair Systems for Piping and Pipework:Low-Risk Applications . 105Article 4.3 Nonmetall
15、ic Internal Lining for Pipe: Sprayed Form for Buried Pipe . 118Part 5 Examination and Testing 128Article 5.1 Pressure and Tightness Testing of Piping and Equipment 128Article 5.2 Repairs and Alterations Without Pressure Testing (in the course ofpreparation) . 142iiiCopyright ASME International Provi
16、ded by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-FOREWORDASME formed an Ad Hoc Task Group on Post Construction in 1993 in response to an increasedneed for recognized and generally accepted engineering standards for the inspection a
17、nd mainte-nance of pressure equipment after it has been placed in service. At the recommendation of thisTask Group, the Board on Pressure Technology Codes and Standards (BPTCS) formed the PostConstruction Committee (PCC) in 1995. The scope of this committee was to develop and maintainstandards addre
18、ssing common issues and technologies related to post-construction activities andto work with other consensus committees in the development of separate, product-specific codesand standards addressing issues encountered after initial construction for equipment and pipingcovered by Pressure Technology
19、Codes and Standards. The BPTCS covers non-nuclear boilers,pressure vessels (including heat exchangers), piping and piping components, pipelines, andstorage tanks.The PCC selects standards to be developed based on identified needs and the availability ofvolunteers. The PCC formed the Subcommittee on
20、Inspection Planning and the Subcommitteeon Flaw Evaluations in 1995. In 1998, a Task Group under the PCC began preparing Guidelinesfor Pressure Boundary Bolted Flange Joint Assembly. In 1999, the PCC formed the Subcommitteeon Repair and Testing. In 2002, the Subcommittee on Flaw Evaluation was disso
21、lved, and replacedby the Joint ASME/API Committee on Fitness for Service. Other topics are under considerationand may be developed into future guideline documents.The subcommittees were charged with preparing standards dealing with several aspects of thein-service inspection and maintenance of press
22、ure equipment and piping. The Inspection PlanningStandard provides guidance on the preparation of a risk-based inspection plan. Defects that areidentified are then evaluated, when appropriate, using the procedures provided in the Fitnessfor Service. Finally, if it is determined that repairs are requ
23、ired, guidance on repair proceduresis provided in the Repair of Pressure Equipment and Piping Standard. These documents are invarious stages of preparation.None of these documents are Codes. They provide recognized and generally accepted goodpractices that may be used in conjunction with Post-Constr
24、uction Codes, such as API 510, API 570,and NB-23, and with jurisdictional requirements.The first edition of ASME PCC-1, Guidelines for Pressure Boundary Bolted Flange Joint Assembly,was approved for publication in 2000. ASME PCC-1-2000 was approved by the American NationalStandards Institute (ANSI)
25、as an American National Standard on November 15, 2000.The first edition of ASME PCC-2, Repair of Pressure Equipment and Piping, was approved forpublication in 2004. This revision was approved by ANSI as an American National Standard onApril 17, 2006.ivCopyright ASME International Provided by IHS und
26、er license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-PREPARATION OF TECHNICAL INQUIRIESINTRODUCTIONThe ASME Post-Construction Standards Committee will consider written requests for interpre-tations and revisions of the rules of this Standard and dev
27、elop new rules if dictated by technologi-cal development. The Committees activities in this regard are limited strictly to interpretationsof the rules or to the consideration of revisions to the present rules on the basis of new data ortechnology. As a matter of published policy, ASME does not “appr
28、ove,” “certify,” “rate,” or“endorse” any item, construction, proprietary device, or activity, and, accordingly, inquiriesrequiring such consideration will be returned. Moreover, ASME does not act as a consultant onspecific engineering problems or on the general application or understanding of the ru
29、les. If,based on the inquiry information submitted, it is the opinion of the Committee that the inquirershould seek professional assistance, the inquiry will be returned with the recommendation thatsuch assistance be obtained.An inquiry that does not provide the information needed for the Committees
30、 full understandingwill be returned.REQUIREMENTSInquiries shall be limited strictly to interpretations of the rules or to the consideration ofrevisions to the present rules on the basis of new data or technology. Inquiries shall meet thefollowing requirements:(a) Scope. Involve a single rule or clos
31、ely related rules in the scope of the standard. An inquiryletter concerning unrelated subjects will be returned.(b) Background. State the purpose of the inquiry, which may be either to obtain an interpretationof rules of this Standard, or to propose consideration of a revision to the present rules.
32、Provideconcisely the information needed for the Committees understanding of the inquiry, being sureto include reference to the applicable Part, Article, Edition, Addenda, paragraphs, figures, andtables. If sketches are provided, they shall be limited to the scope of the inquiry.(c) Inquiry Structure
33、(1) Proposed Question(s). The inquiry shall be stated in condensed and precise question format,omitting superfluous background information, and, where appropriate, composed in such a waythat “yes” or “no” (perhaps with provisos) would be an acceptable reply. The inquiry statementshould be technicall
34、y and editorially correct.(2) Proposed Reply(ies). Provide a proposed reply stating what the inquirer believes that thestandard requires.If in the inquirers opinion, a revision to the standard is needed, recommended wording shallbe provided in addition to information justifying the change.SUBMITTALI
35、nquiries shall be submitted in typewritten form; however, legible handwritten inquiries willbe considered. They shall include the name and mailing address of the inquirer, and may eitherbe sent by email to SecretaryPCCasme.org, or by mail to the following address:SecretaryASME Post ConstructionThree
36、 Park AvenueNew York, NY 10016-5990vCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME PRESSURE TECHNOLOGYPOST CONSTRUCTION COMMITTEE(The following is the roster of the Committee at the time of
37、approval of this Standard.)STANDARDS COMMITTEE OFFICERSC. Becht, ChairJ. R. Sims, Vice ChairU. DUrso, SecretarySTANDARDS COMMITTEE PERSONNELG. A. Antaki, Washington GroupJ. L. Arnold, Alstom Power, Inc.J. E. Batey, The Dow Chemical Co.C. Becht, Becht Engineering Co., Inc.D. L. Berger, PPL Generation
38、 LLCP. N. Chaku, ABB Lummus Global, Inc.C. D. Cowfer, Cowfer ConsultingU. DUrso, The American Society of Mechanical EngineersP. C. Hackford, State of UtahW. J. Koves, UOP LLCD. A. Lang, FM GlobalC. R. Leonard, Life Cycle EngineeringREPAIR AND TESTING SUBCOMMITTEE (PCC)C. Becht, Chair, Becht Engineer
39、ing Co., Inc.G. A. Antaki, Vice Chair, Washington GroupU. DUrso, Secretary, The American Society of MechanicalEngineersL. P. Antalffy, Fluor DanielJ. A. Brown, AREVA NPP. N. Chaku, ABB Lummus Global, Inc.W. D. Doty, Doty administrative or policy requirements are outsideof the scope of this Standard.
40、2 ORGANIZATIONThis Standard is divided into five Parts.(a) Part 1 covers the scope, organization, and intentand is applicable to all articles in this Standard. Table1 provides guidance for the applicability of repair meth-ods listed in this Standard.(b) Part 2 covers repair methods and techniques th
41、atinclude the use of welding, brazing, soldering or othermethods involving metal deposit.(c) Part 3 covers mechanical repairs, with or withoutsealant, such as bolted clamps or fixtures and includesall repair methods not covered in Part 2 or Part 4.(d) Part 4 covers repairs using nonmetallic means,su
42、ch as nonmetallic liners and wraps, and bonding (e.g.,joining by epoxy), including bonding of metallic compo-nents.1Equipment and piping within the scope of ASME PressureTechnology Codes and Standards includes piping (including pipe-lines) and piping components (such as valves), boilers, pressureves
43、sels (including heat exchangers), and storage tanks.1(e) Part 5 covers examination and testing methodsand techniques.3 INTENT3.1This Standard provides technical information, proce-dures, and recommendations for repair methods thatwere determined by consensus to be recognized andgenerally accepted go
44、od engineering practice. Whereequipment repair is subject to jurisdictional regulation,jurisdictional approvals may be required.3.2The words should, shall, and may are used in the repairarticles of PCC-2 and they have the following intent:should: an action that is not mandatory. It indicates anactio
45、n that when performed, is generally considered tobe good practice; however, there are some circumstanceswhen the action is not appropriate or required, so theword should is used to provide flexibility for the article tocover a broad range of circumstances. It is not mandatoryunless so specified by o
46、thers in the application of thesearticles.shall: an action that is mandatory. It indicates an actionthat is an essential element of the repair method thatcannot be eliminated.may: indicates an action that is permitted, but notrequired.3.3For administrative requirements such as inspection,documentati
47、on, and quality control, the user is referredto an applicable post-construction code and to the juris-dictional requirements. In the absence of an applicablepost-construction code or jurisdictional requirements,the owner of the pressure equipment or piping shouldestablish the administrative requirem
48、ents. A post-construction code is one that provides requirements andguidance for inspection and/or repair of equipmentCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME PCC-22006Table1Guideforth
49、eSelectionofRepairTechniqueGeneralWallLocalWallCircumferentialLongitudinalThinningThinningPittingGougesBlistersLaminationsCracksCracksOther2.1Butt-weldedinsertplatesinpressurecomponentsYYYYYYYYNote(1)2.2ExternalweldoverlaytorepairmethodsforinternalthinningNYYYNNNNNote(2)2.3Seal-weldedthreadedconnectionsandsealweldrepairsNANANANANANANANANote(3)2.4WeldedleakboxrepairNYYNNNRRNote(4)
