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National Board

Inspection Code

An American National Standard

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Library of Congress Catalog Card No. 52- Printed in the United States of America All Rights Reserved

The National Board of Boiler and Pressure Vessel Inspectors

Headquarters 1055 Crupper Avenue Columbus, Ohio 43229- 614.888. 614.847.1828 FAX

Testing Laboratory 7437 Pingue Drive Worthington, Ohio 43085- 614.888. 614.848.3474 FAX

Training and Conference Center 1065 Crupper Avenue Columbus, Ohio 43229- 614.888. 614.847.5542 FAX

Note: Pages ii through xvi are not part of this American National Standard

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COMMITTEE ON NATIONAL BOARD INSPECTION CODE

R. Marvin State of Wasington

C.A. Neumann Eastman Kodak Company

M.R. Peterson State of Alaska

J.T. Pillow APComPower Inc.

H.M. Richards Southern Company

J. Richardson Consultant - Dresser Inc.

J. Sekely Wayne Crouse, Inc.

R. Snyder Consultant

H. Staehr Factory Mutual Global

S. Staniszewski Jr. U.S. Department of Transportation

R.C. Sulzer Babcock & Wilcox

H.N. Titer MIRANT Mid-Atlantic

M.J. Wheel State of Vermont

C.S. Withers, Chair The National Board of Boiler and Pressure Vessel Inspectors

R.V. Wielgoszinski, Vice Chair Hartford Steam Boiler Inspection and Insurance Co. of Connecticut

R. Ferrell, Secretary The National Board of Boiler and Pressure Vessel Inspectors

S.E. Bacon Conoco Phillips

D.A. Canonico Canonico & Associates

W. Carey International Brotherhood of Boilermakers

R.R. Cate State of Louisiana

D. Cook State of California

W.D. Doty Doty and Associates, Inc.

P.D. Edwards Stone & Webster, Inc.

G.W. Galanes Midwest Generation EME, LLC

P.C. Hackford State of Utah

C. Hopkins Seattle Boiler Works

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NBIC Subcommittee on Overpressure Protection

D.A. Bowers Jr., Chairman Velan Valve

C.A. Neumann, Vice Chair Eastman Kodak Company

J.F. Ball, P.E., Secretary The National Board of Boiler and Pressure Vessel Inspectors

M. Brodeur International Valve & Instr. Corporation

S. Cammeresi Allied Valve

J.A. Cox Deluca Test Equipment

D.B. DeMichael DuPont Company

R.W. Donalson Anderson, Greenwood & Co.

F. Hart Flowserve US, Inc.

R.D. Marvin State of Washington

T. Parks State of Texas

D.K. Parrish FM Global

J. Richardson Dresser Industries, Inc.

NBIC Subcommittee on Mandatory Appendices

P.D. Edwards, Chairman Stone & Webster, Inc.

R. Sullivan, Secretary The National Board of Boiler and Pressure Vessel Inspectors

S.E. Bacon Conoco Phillips

D.A. Canonico Canonico & Associates

W. Carey International Brotherhood of Boilermakers

D. Cook State of California

C. Hopkins Seattle Boiler Works

M.R. Peterson State of Alaska

J.T. Pillow APComPower Inc.

B. Schulte Reliant Energy, Inc.

J. Sekely Wayne Crouse, Inc.

R. C. Sulzer Babcock & Wilcox

R.A. Wacjer Dupont

M. Webb Xcel Energy

R.V. Wielgoszinski Hartford Steam Boiler Inspection and Insurance Company of Connecticut

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NBIC Subcommittee on Part RB

R. R. Cate, Chairman State of Louisiana

H. Staehr, Vice Chair Factory Mutual Global

J.F. Ball, Secretary The National Board of Boiler and Pressure Vessel Inspectors

S.E. Bacon Conoco Phillips

W. Carey International Brotherhood of Boilermakers

M.R. Peterson State of Alaska

J. M. Richards Southern Company

J. Sekely Wayne Crouse, Inc.

S. Staniszewski Jr. U.S. Department of Transportation

R.A. Wacker Dupont

NBIC Subcommittee on Parts RC & RD

R.V. Wielgoszinski, Chair Hartford Steam Boiler Inspection and Insurance Co. of Connecticut

R. Ferrell, Secretary The National Board of Boiler and Pressure Vessel Inspectors

D.A. Canonico Canonico & Associates

D. Cook State of California

W.D. Doty Doty & Associates, Inc.

P.D. Edwards Stone & Webster, Inc.

D. Fox The Oncor Group

G.W. Galanes Midwest Generation EME, LLC

C. Hopkins Seattle Boiler Works

B. Juarez OneBeacon Insurance

J.P. Larson OneBeacon Insurance

J.T. Pillow APComPower Inc.

R.C. Sulzer Babcock & Wilcox

M. Webb Xcel Energy

M.J. Wheel State of Vermont

J.M. Yagen DYNEGY Midwest Generation

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NATIONAL BOARD MEMBERS

Alabama ............................................................................................................................................................. Ralph P. Pate Alaska ..........................................................................................................................................................Mark R. Peterson Arizona ....................................................................................................................................................................................... Arkansas ......................................................................................................................................................... Gary R. Myrick California ....................................................................................................................................................... Donald C. Cook Colorado .....................................................................................................................................................Randall D. Austin Connecticut ........................................................................................................................................................ Allan E. Platt Delaware........................................................................................................................................................ James B. Harlan Florida ......................................................................................................................................................................................... Georgia ..................................................................................................................................................................Earl Everett Hawaii................................................................................................................................................................Yash Nagpaul Illinois ............................................................................................................................................................ David A. Douin Indiana ..................................................................................................................................................................... Dan Willis Iowa ...................................................................................................................................................................Robert B. West Kansas .......................................................................................................................................................... Donald J. Jenkins Kentucky ........................................................................................................................................................ Rodney Handy Louisiana ..........................................................................................................................................................Robert R. Cate Maine .............................................................................................................................................................. John H. Burpee Maryland .............................................................................................................................................................. Karl J. Kraft Massachusetts .................................................................................................................................................. Mark Mooney Michigan ...................................................................................................................................................... Robert J. Aben Jr. Minnesota ...........................................................................................................................................................Joel T. Amato Mississippi ................................................................................................................................................ Henry T. McEwen Missouri ............................................................................................................................................................. James L. Pratt Montana...................................................................................................................................................................................... Nebraska......................................................................................................................................................... Daniel E. Burns Nevada.........................................................................................................................................................Gerard F. Mankel New Hampshire ........................................................................................................................................... Wayne Brigham New Jersey .............................................................................................................................................. Milton Washington New Mexico ............................................................................................................................................................................... New YorkNew YorkNew York ....................................................................................................................................................... .......................................................................................................................................................Paul A. Conklin North Carolina............................................................................................................................................. Jack M. Given Jr. North Dakota ......................................................................................................................................................Robert Reetz Ohio ...................................................................................................................................................................Dean T. Jagger Oklahoma .............................................................................................................................................. Marion L. Holloway Oregon ................................................................................................................................................................. Ray Andrus Pennsylvania ...................................................................................................................................................John D. Payton Rhode Island ............................................................................................................................................ Benjamin Anthony South Dakota ............................................................................................................................................... Howard D. Pfaff Tennessee ..........................................................................................................................................................Martin R. Toth Texas ....................................................................................................................................................................... Terry Parks Utah .............................................................................................................................................................. Pete C. Hackford Vermont ...................................................................................................................................................... Malcolm J. Wheel Virginia ..............................................................................................................................................................Fred P. Barton Washington ................................................................................................................................................ Robert D. Marvin West Virginia ............................................................................................................................................... Arthur E. Adkins Wisconsin ............................................................................................................................................... Michael J. Verhagen

Chicago, ILChicago, ILChicago, IL ..........................................................................................................................................................................................................................................................................................................Michael J. Ryan Detroit, MI .......................................................................................................................................................Michael Barber Los Angeles, CALos Angeles, CALos Angeles, CA ....................................................................................................................................................................................................................................................................................................Jovie Aclaro Milwaukee, WI ............................................................................................................................................. Randal S. Pucek

Alberta ................................................................................................................................................................ Ken K.T. Lau British Columbia ..........................................................................................................................................Malcolm Bishop Manitoba......................................................................................................................................................... I. Wayne Mault New BrunswickNew BrunswickNew Brunswick ......................................................................................................................................................................................................................................................................................................Dale E. Ross Newfoundland & Labrador ................................................................................................................... E. Dennis Eastman Northwest Territories ....................................................................................................................................Steve Donovan Nova Scotia ...................................................................................................................................................Charles J. Castle Nunavet Territory ................................................................................................................................E. William Bachellier Ontario ..................................................................................................................................................................Rick D. Mile Prince Edward Island ................................................................................................................................... Kenneth Hynes Quebec .......................................................................................................................................................... Madiha M. Kotb Saskatchewan .............................................................................................................................................. Nicholas Surtees Yukon Territory .............................................................................................................................................. Daniel C. Price

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FOREWORD

The National Board of Boiler and Pressure Vessel Inspectors is an organization comprised of Chief Inspectors for the states, cities and territories of the United States and provinces and territories of Canada. It is organized for the purpose of promoting greater safety to life and property by securing concerted action and maintaining uniformity in the construction, installation, inspection, repair and alteration of pressure retaining items, thereby assur- ing acceptance and interchangeability among jurisdictional authorities responsible for the administration and enforcement of various codes and standards.

In keeping with the principles of promoting safety and maintaining uniformity, the National Board originally published The National Board Inspection Code (NBIC) in 1946, establishing rules for inspection and repairs to boilers and pressure vessels. The National Board Inspection Code (NBIC) Committee is charged with the responsibility for maintaining and revising the NBIC. In the interest of public safety, the NBIC Committee decided, in 1995, to revise the scope of the NBIC to include rules for the repair or alteration to pressure-retaining items.

The NBIC Committee’s function is to establish rules of safety governing the repair, alteration and inspection of pressure-retaining items, and to interpret these rules when questions arise regarding their intent. In formulating the rules, the NBIC Committee considers the needs of users, repair organizations, and Inspectors. The objective of the rules is to afford reasonably certain protection of life and property so as to give a reasonably long, safe period of usefulness. Advancements in design and material and the evidence of experience are recognized.

The rules established by the NBIC Committee are not to be interpreted as approving, recom- mending, or endorsing any proprietary or specific design, or as limiting in any way the repair organization’s freedom to choose any method of repair or alteration that conforms to the NBIC rules.

The NBIC Committee meets regularly to consider revisions of the rules, new rules, and requests for interpretations. Requests for interpretation must be addressed to the Secretary in writing and must give full particulars in order to receive consideration and a written inter- pretation (see Mandatory Appendix 1 covering preparation of technical inquiries). Proposed revisions to the Code resulting from inquiries will be presented to the NBIC Committee for appropriate action.

Proposed revisions to the Code approved by the NBIC Committee are submitted to the American National Standards Institute and published on the National Board Web site to invite comments from all interested persons. After the allotted time for public review and final approval, revisions are published annually in Addenda to the NBIC.

Repair organizations or users of pressure-retaining items are cautioned against making use of revisions that are less restrictive than former requirements without having assurance that they have been accepted by the jurisdiction where the pressur-retaining item is installed.

The general philosophy underlying the NBIC is to parallel those provisions of the original code of construction, as they can be applied to a repair or alteration.

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INTRODUCTION

It is the purpose of the National Board Inspection Code (NBIC) to maintain the integrity of pres- sure-retaining items after they have been placed into service by providing rules for inspection, repair and alteration, thereby ensuring that these objects may continue to be safely used.

The NBIC is intended to provide guidance to jurisdictional Inspectors, users, and organizations performing repairs and alterations, thereby encouraging the uniform administration of rules pertaining to pressure-retaining items.

It provides guidance for the process of inspection, repair and alteration but does not provide details for all conditions found in pressure-retaining items. Where complete details are not provided in this Code, the Code user is advised to seek technical guidance.

ADDENDA

Colored-sheet Addenda, which include revisions and additions to this Code, are published annually. Addenda are permissive on the date issued and become effective six months after the date of issue. The addenda will be sent automatically to purchasers of the Code up to the publication of the next issue.

INTERPRETATIONS

On request, the NBIC Committee will render an interpretation of any requirement of this Code. Interpretations are not part of this Code or its addenda.

JURISDICTIONAL PRECEDENCE

Reference is made throughout this Code to the requirements of the “jurisdiction”. Where any provision herein presents a direct or implied conflict with any jurisdictional regulation, the jurisdictional regulation shall govern.

AMERICAN PETROLEUM INSTITUTE

The American Petroleum Institute promulgates codes and standards for the inspection, repair, alteration, rerating and fitness for service assessment of pressure vessels and piping used by the petroleum and chemical process industries. These codes and standards include:

API 510 Pressure Vessel Inspection Code: Maintenance Inspection, Rating, Repair and Altera- tion.

API 570 Piping Inspection Code: Inspection, Repair, Alteration and Rerating of Inservice Pip- ing Systems.

API 579 Fitness-for-Service

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It is the intent of the NBIC that this Code cover installations other than those covered by API codes and standards unless the jurisdiction rules otherwise.

UNITS OF MEASUREMENT

Both inch-pound units and SI units are used in the NBIC. The value stated in inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in parentheses.

US customary units or SI units may be used with this edition of the NBIC, but one system shall be used consistently throughout a repair or alteration of pressure-retaining items. The original code of construction should be used as the basis for selecting the units of measurement for repair or alteration or pressure-retaining items.

ORGANIZATION

1. This book is divided into seven parts

a. Part RA describes the administrative requirements for the accreditation of repair orga- nizations.

b. Part RB provides guidelines for inservice inspection of pressure containing items (boil- ers, pressure vessels, piping).

c. Part RC provides requirements that apply to repairs and alterations of pressure-retain- ing items.

d. Part RD gives guidance for welding methods as alternatives to postweld heat treat- ment. Some repair methods are described to further give guidance to the owner user, inspector, and repair organizations.

e. Mandatory appendices as identified by numerals contain specific rules that are not covered in Parts RA, RB, RC and RD. Their requirements are mandatory when appli- cable.

f. Nonmandatory appendices as identified by letters provide information and suggested good practices. The information provided is not mandatory. However, if used, shall be used in its entirety to the extent applicable.

g. Interpretations are provided for information only and are not part of this code.

2. Tables, charts and figures provide relevant illustrations or supporting information for text passages, and are designated with numbers corresponding to the paragraph they illustrate or support. Multiple tables, charts or figures referenced by the same paragraph will have additional numbers reflecting the order of reference.

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Appendix E Recommended Procedures for Repairing Pressure Relief Valves ..............

Appendix F Pressure Differential Between Safety or Safety Relief Valve Setting and Boiler or Pressure Vessel Operating Pressure ...........................

Appendix G Safety Valves on the Low Pressure Side of Steam Pressure-Reducing Valves ................................................................................

Appendix H Recommended Guide for the Inspection of Pressure Vessels in LP Gas Service ...............................................................................................

Appendix I Installation Requirements ................................................................................

Appendix J Guide to Jurisdictions for Authorization of Owners-Users to Make Adjustments to Pressure Relief Valves ............................................

Appendx K Inspection, Repairs and Alterations for Yankee Dryers ...............................

Interpretations ..............................................................................................................................

Index ..............................................................................................................................

Administrative Requirements

Part RA

PART RA — ADMINISTRATIVE REQUIREMENTS

RA-1000 GENERAL

RA-1010 SCOPE

This part describes the administrative require- ments for the accreditation of repair organiza- tions and for the accreditation of Owner-User Inspection Organizations.^1

The National Board administers three specific accreditation programs as shown below:

“R” ........ Repairs and Alterations to Pressure-Retaining Items “VR” ..... Repairs to Pressure Relief Valves “NR” ..... Repair and Replacement Activities for Nuclear Items

RA-1020 ACCREDITATION PROCESS

Any organization may apply to the National Board to obtain a Certificate of Authoriza- tion for the requested scope of activities. A review shall be conducted to evaluate the organization’s quality system. The individual assigned to conduct the evaluation shall meet the qualification requirements prescribed by the National Board. Upon completion of the evaluation, any deficiencies within the organization’s quality system will be docu- mented and a recommendation will be made to the National Board regarding issuance of a Certificate of Authorization.

RA-2000 ACCREDITATION OF REPAIR

ORGANIZATIONS

RA-2010 SCOPE

The National Board administers accreditation programs for authorization of organizations performing repairs and alterations to pres- sure-retaining items and/or pressure relief valves.

As part of the accreditation process, an appli- cant’s quality system is subject to a review. National Board procedures provide for the confidential review resulting in recommen- dations to issue or not issue a Certificate of Authorization.

When the quality system requirements of the appropriate section of Part RA have been met, a Certificate of Authorization and appropri- ate National Board symbol stamp shall be issued.

The accreditation programs provide require- ments for organizations performing repairs and alterations to pressure-retaining items. Depending upon the expected scope of ac- tivities at the time of review, organizations may be authorized to perform design only, metallic or non-metallic repairs, and/or al- terations either in the shop only, field only, or shop and field. Repairs and/or alterations to metallic and non-metallic pressure-retaining items are made by welding, bonding and/or mechanical assembly.

RA-2020 SCOPE ISSUANCE AND

REVISION TO PRESSURE-

RETAINING ITEMS

Any scope revision shall require authorized inspection agency acceptance of quality system changes. These changes shall be sub- mitted to the National Board for acceptance. A program review may be required by the National Board or the jurisdication to assure

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(^1) Caution, some jurisdictions may independently ad- minister a program of authorization for organiza- tions to perform repairs and alterations within that jurisdiction.

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NATIONAL BOARD INSPECTION CODE

quality system requirements are met for scope changes. Upon acceptance of the changes, the National Board will issue a Certificate of Authorization with a revised scope.

RA-2030 SCOPE ISSUANCE AND

REVISION TO PRESSURE

RELIEF VALVES

The “VR” accreditation program provides requirements for organizations performing repairs to pressure relief valves. For scope is- suance and revisions, refer to RA-2200.

RA-2100 “R” ADMINISTRATIVE

RULES AND PROCEDURES

RA-2110 SCOPE

This section provides requirements that must be met by organizations in order to obtain a National Board Certificate of Authorization to use the “R” Symbol Stamp for the repair or alteration of pressure-retain- ing items. Organizations may be authorized to perform repairs only, or repairs and altera- tions.

For further information contact:

Accreditation Department The National Board of Boiler and Pressure Vessel Inspectors 1055 Crupper Avenue Columbus, OH 43229-

Phone — 614.888. Fax — 614.847.

The issuance of the “R” Stamp is not re- stricted to organizations whose primary business is to repair and alter pressure retaining items, nor to manufacturers of pres- sure-retaining items. Owners and Users of pressure-retaining items and other organiza- tions that qualify in accordance with these rules may also obtain the “R” Stamp.

Owners or users may be accredited for both a repair and inspection program provided the owner or user complies with the requirements of the “R” program and the National Board requirements for an Owner-User Inspection Organization. The requirements of RA-2120(a) do not apply if the owner or user chooses to use the Owner-User Inspection Organization to accept the repair quality system when:

a. There is no conflict with jurisdictional requirements.

b. The line of authority for the Owner-User Inspection Organization shall be indepen- dent of the organization responsible for execution of “R” program work.

c. The process and Inspector limitations are described in the written Owner-User Inspection Organization’s quality system manual.

RA-2120 PREREQUISITES FOR

ISSUING A NATIONAL

BOARD CERTIFICATE OF

AUTHORIZATION

Before an organization can obtain a National Board “R” Certificate of Authorization, the organization shall:

a. Have and maintain an Inspection Agree- ment with an Authorized Inspection Agency,

b. Have, in the English language, a written Quality System which complies with the requirements of this section and includes the expected scope of activities,

c. Have the current edition of the National Board Inspection Code, and

d. Have available a copy of the code of construction appropriate to the intended scope of work.

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