Text

Documentation of ASME III NA-1140 Review for Piping & Supports
	ML20207S121
Person / Time
Site:	Comanche Peak
Issue date:	10/28/1986
From:	Cokonis A, Green W, Mcquaid P; STONE & WEBSTER ENGINEERING CORP.
To:	;
Shared Package
ML20207S118	List: ML20207S119; ML20207S120; ML20207S121; TXX-6143, Forwards Documents Requested by Cygna During 861113-14 Meeting W/Cygna & S&W in Cherry Hill,Nj;
References
	15454-N(C)-007, 15454-N(C)-7, NUDOCS 8703190008
	Download: ML20207S121 (18)
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DOCUMENTATION OF ASME III NA-1140 REVIEW FOR PIPING AND SUPPORTS Prepared for p

l TEXAS UTILITIES GENERATING COMPANY (TUGCO)

COMANCHE PEAK STEAM ELECTRIC STATION

, UNITS 1 AND 2

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W. H. Green /A. J. Cokonis P. J. McQuaid

- October 28, 1986 Approved by h [

R. R. Wrucke / S. C. Chow Project Engineer - Unit 1 Manager Engineering Mechanics Division h _,D C. A. Fonseca R'. Ryan Assista d Manager

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Project Engineer - Unit 2 Materials Division

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S. Feldman 'A. W. Chan Project Engineer - Site Ass stant Proj ct Manager ;

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TABLE OF CONTENTS (o

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i BACKGROUND 1 OBJECTIVE 1 REFERENCES 1 CONCLUSIONS 1 DISCUSSION 3 GENERAL ALTERNATIVES TO THE CODE OF RECORD

1. 1974 EDITION WINTER 1978 ADDENDA 3 Appendix 0 - Rules for Design of Safety Valve Installations

2. 1983 EDITION 4 l NC-3658.2 - Standard Flange Joints at Moderate l

Pressures and Temperatures j NC-3658.3 - ANSI B16.5, Flanged Joints with High-Strength Bolting ND-3658.2 - Standard Flange Joints at Moderate Pressures and Temperatures

[x ND-3658.3 - ANSI B16.5, Flanged Joints with High-Strength Bolting

3. 1983 EDITION 6 Figure NC-3673.2(b) Flexibility and Stress Intensification Factors Figure NC-3673.2(b) Branch Dimensions Figure ND-3673.2(b) Flexibility and Stress Intensification Factors Figure ND-3673.2(b) Branch Dimensions

4. 1977 EDITION WINTER 1978 ADDENDA 8 NF-3226 - Through Plate Thickness Tensile Limit (Class 1)

NF-3321.1 - Design Conditions (Class 2 Plate and Shell)

Figure NF-3226.5 (Class 1 Plate and Shell)

XVII-2211 - Stress in Tension (Class 1)

Figure XVII-2211(C) (Class 1, 2, and 3 Linear) 2019-1545405-HC4 i

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5. 1977 EDITION WINTER 1979 ADDENDA 10

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NF-3391.1 - Allowable Stress Limits (Class 2 and MC Plate /Shell)

NF-3392.1 - Allowable Stress Limits (Class 2 and MC Linear)

6. 1977 EDITION WINTER 1979 ADDENDA 10

., XVII-2454(C) - Butt and Groove Weld

7. 1980 EDITION 11 NF-1133 - Intervening Elements in Relation to Juris-dictional Boundaries NF-1131.6 - Portion F .

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8. 1980 EDITION 12 XVII-2462 - Minimum Edge Distance

9. 1980 EDITION SUMMER 1983 ADDENDA 13 NF-3225.1 - Design Limits (Design of Bolting)

NF-3225.2 - Service Limits Level A through D NF-3324.6 - Design Requirements for Bolted Joints Table NF-3225.2 Stress Limit Factors

10. 1983 EDITION SUMMER 1985 ADDENDA 14

. . - NF-4721 - Bolt Holes

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BACKGROUND Safety-related piping and pipe supports on the Comanche Peak Steam Elec-(' N tric Station Units 1 and 2 are designed and constructed to the require-ments of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Section III, Division I, Rules for Construction of Nuclear Power Plant Components. This code, in paragraph NA-1140, pro-vides rules for required effective dates of this code, code addenda, and code cases to be applied to an item. The code effective date (code of record) for piping on Comanche Peak Units 1 and 2 is the 1974 Edition, including the Summer 1974 Addenda. For pipe supports, the code of record is the 1974 Edition, including the Winter 1974 Addenda. Code paragraph NA-1140 also provides direction for use of portions of later codes if agreed to by the parties involved.

OBJECTIVE This report is a documentation of a review to ensure conformance to part (f) of paragraph NA-1140 in the code, which gives direction for the use of portions of codes later than the code of record.

Paragraph NA-1140(f) states the following:

" Code Editions, Addenda, and Cases which have not become mandatory on the contract date for a component may be used by mutual consent of the Owner or his agent and Manufacturer or Installer on or after the dates permitted by (a) through (d) above. It is permitted to use specific provisions within an Edition or Addenda provided that

( all related requirements are met."

This report will docur.ent compliance to the above paragraph for the al-ternates to the code of record, which are defined in Sections 2.1 and 2.2 of CPPP-7. Related requirements (if any) will be defined and identified and the method of compliance to them will be explained.

REFERENCE American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section III, 1974 Edition CONCLUSIONS The requirement of paragraph NA 1140(f) to ensure that all related re-quirements are met, if specific paragraphs of later codes are used, has been satisfied.

In the case of the Winter 1979 Addenda and through-thickness stresses in plates and rolled sections (Items 4 and 5), related requirements eventu-ally did appear in a later code. They were not invoked, and the reasons are explained herein.

For the other topics, there are no related requirements in other para-graphs of the code that need to be invoked that have not been invoked by 2019-1545405-HC4 1

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-i the callout of the new paragraph or by the implied direction to use related rules in the original code.

Host of the alternates to the code of record adopted by the project were

stand-alone types; for the others, this review ensures that their use is acceptable.

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DISCUSSION

, GENERAL For the purpose of this report, the related requirements mentioned in paragraph NA-1140(f) are considered to be those contained in Section III, subsections NC for Piping, NF for Supports, and NA (or NCA), General Requirements, and the Appendices of Section III. They l will be addressed in the following order:

4

Article 1000 - Introduction

)

Article 2000 - Materials

Article 3000 - Design

Article 4000 - Fabrication and Installation

Article 5000 - Inspection

Article 6000 - Testing (NC only)

Article 7000 - Overpressurization Protection (NC only)

Article 8000 - Nameplates

Subsection NA (or NCA)

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Appendixes

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Each of the above areas of the code will be discussed for the alter-nptes to the code of record identified below. If there are any re-lated requirements in Section II, Material Specifications, or Appendix I, Materials, they will be discussed under Article 2000 in the Discussion section.

ALTERNATIVES TO THE CODE OF RECORD

1. 1977 Edition - Winter 1978 Addenda Appendix 0 - Rules for Design of Safety Valve Installations Appendix 0 first appeared in the Winter 1978 Addenda, and it 1

provides guidance for the design and analysis of the piping components containing safety valves. It provides the safety valve

load computation, the stress acceptance criteria, and general design i

considerations for both open and closed safety valve discharge systems.

1 Related Requirements Article NC/ND-1000 - Introduction There are no related requirements affected by this change.

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Article NC/ND-2000 - Materials There are no related requirements affected by this change.

Article NC/ND-3000 - Design Appendix 0 refers to paragraph NC/ND-3652 for the evaluation of the reaction force moment (Mb) and subparagraph NC/

ND-3643.3(c)(6) for the reinforcement of multiple . openings .

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The code of record is used to evaluate the above criteria which is similar to the Winter 1978 criteria; therefore, the related requirements are met.

Article NC/ND-4000 - Fabrication and Installation There are no related requirements affected by this 'hange. c Article NC/ND-5000 - Examination There are no related requirements affected by this change.

Article NC/ND-6000 - Testing There are no related requirements affected by this change.

Article NC/ND-7000 - Overpressure Protection There are no related requirements affected by this change.

'- Article NC/ND-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.

Subsection NA - General Requirements There are no related requirements affected by this change.

Appendices There are no related requirements affected by this change.

2. 1983 Edition Paragraph NC-3658.2 - Standard Flange Joints at Moderate Pressures and Temperatures Paragraph NC-3658.3 - ANSI B16.5 Flanged Joints with High-Strength

' Bolting Paragraph ND-3658.2 - Standard Flange Joints at Moderate Pressures and Temperatures Paragraph ND-3658.3 - ANSI B16.5 Flanged Joints with High-Strength l Bolting 2019-1545405-HC4 4 s.- - s-- =- p.-. - - - - -- --w- - - - - . - - - . _ . _ , . . . . _ _ - . ,_,-----,--__m-y

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The 1983 Edition was selected for this topic because of the limited coverage provided in the code of record.

These paragraphs are intended for the simplified analysis of standard flanges (e.g., ANSI B16.5).

Related Requirements:

Article NC/ND-1000 - Introduction There are no related requirements affected by this change.

Article NC/ND-2000 - Materials Paragraph NC/ND-3658.3, requires use of 1983 S values, since S must be > 20,000 psi. All selected, bolt materials have been checked and in fact satisfy this criteria in 1983 Code thus allowing use of this procedure.

s Article NC/ND-3000 - Desian 4

Paragraph NC/ND-3658.3 refers to Table NC/ND-3673.2(b)-1 for the evaluation of the pipe to flange welds. The requirements

' of the code of record are used for this evaluation, which is more conservative than the 1993 Code for both stress intensifi-cation factors and primary stress evaluation (paragraph NC/

ND-3652 and paragraph NC/ND-3653.1).

Article NC/ND-4000 - Fabrication and Installation

(' This section has no related requirements to NC/ND-3658.3.

Bolting requirements discussed in NC/ND-4720 are identical in both years 1983 and 1974.

Article NC/ND-5000 - Examination There are no related requirements affected by this change.

Article NC/ND-6000 - Testina There are no related requirements affected by this change.

j Article NC/ND-7000 - Overpressure Protection l

! There are no related requirements affected by this change.

Article NC/ND-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.

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' Subsection NA I .

There are no related requirements affected by this change.

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Appendices Subparagrapha NC/ND-3658.2 and NC/ND-3658.3, which apply to s

simplified analysis of standard flanges, do not require the implementation of Appendix XI. Appendix XI is required for detailed (nonsimplified) analysis of all types of flanges (standard and nonstandard). The code of reference can be used

- for an Appendix XI evaluation.

3. 1983 Edition Figure NC-3673.2(b) Flexibility and Stress Intensification Factors (For Branch Connections Only -

Class II Piping)

Figure NC-3673.2(b) Branch Dimensions Figure ND-3673.2(b) Flexibility and Stress Intensification Factors (For Branch Connections Only -

Class III Piping)

Figure ND-3673.2(b) Branch Dimensions The 1983 Edition was selected for the stress intensification factors of the branch connection because the earlier codes contained limited information.

Related Requirements:

Article NC/ND-1000 - Introduction There are no related requirements affected by this change.

Article NC/ND-2000 - Materials There are no related requirements affected by this change.

Article NC/ND-3000 - Design The branch connection intensification formulation of the 1974 code was incomplete; hence it was necessary to use the later editions. The formulation was completed by additions to the code, in the Summer 1979 and Summer 1980 Addenda. The 1983 version of the branch connection intensification corresponds with the Summer 1979 and Summer 1980 versions, with certain additional requirements as noted below.

The related requirements of the branch connection stress inten-sification formulation of the 1983 code are listed below, along with the corresponding justification to the CPSES code of record.

i s. The 1983 code requires the use of B-indices for the prima-ry stress evaluation (Equations 8 and 9 of NC-3652 and ND-3652), whereas the earlier codes use the .75 i f actor. -

The 1983 formulation of the branch connection was based on the Summer 1979 and Sumser 1980 Addenda, and the B-indices 2019-1545405-HC4 6

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were introduced in the Winter 1981 Addenda, hence, the branch i-factors are applicable with both primary stress acceptance criteria versions.

b. The 1983 code, note 6(d) of Figure NC-3673.2(b)-1 and ND-3673.2(b)-1 removed the requirements of the corner ra-dius, r, for piping less than 4 in nominal pipe size, hence, dhere is no impact since the CPSES specification requirements are more restrictive.

c. The 1983 code, note 6(h) of Figure NC-3673.2(B)-1 and ND-3673.2(b)-1 requires the multiplication of the 1-factors by a factor of 2 for cases where the r radius 2 is not satisfied. This requirement is more conservative than the earlier codes; hence there is no impact.

d. The 1983 code, general note 2 of Figure NC-3673.2(b)-2 and

- ND-3673.2(b)-2 allows the use of the higher thickness (Tb) when L exceeds .5C . This requirement is less restricdive in the 198YIode; however, it is acceptable for use provided the analyst evaluates separately and ap-s plies the appropriate i-factors for both the branch fitting /run pipe intersection and the branch fitting /

l branch pipe ir ersection.

Article NC/ND-4000 - Fabrication and Installation d

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Article NC/ND-5000 - Examination There are no related requirements affected by this change.

Article NC/ND-6000 - Testing

> There are no related requirements affected by this change.

Article NC/ND-7000 - Overpressure Protection There are no related requirements affected by this change.

Article NC/ND-8000 - Nameplates Stamping, and Reports There are no related requirements affected by this change.

i I Subsection NA ,

There are no related requirements affected by this change.

Appendices There are no related requirements affected by this change.

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4. 1977 Edition - Winter 1978 Addenda Paragraph XVII-2211 - Stress in Tension Figure XVII-2211(c) Illustrations of Maximus Design Stress in Through-Thickness Direction of Plates and Elements of Rolled Shapes (Figure Deleted)

Paragraph NF-3321.1 - Design Conditions Paragraph NF-3226 - Through-Plate Thickness Tensile Limit Figure NT-3226.5 Illustrations of Maximum Design Stress in Through-Thickness Direction of Plates and Elements of Rolled Shapes (Figure Deleted)

Invoking these paragraphs deletes the original code requirements to address through-thickness tensile stress in plates or rolled sec-i tions which is caused by the weld of the adjoining member. The original code concern was that high through-thickness stress in plates and rolled sections would increase the possibility of lamellar tearing (subsurface splitting of the material parallel to its rolled surfaces). The original code-imposed limits on the through-thickness tensile stress amounted to a reduction in allow-able load by a factor of .73. This restriction had the effect of requiring the designer to increase the weld size to achieve the low-er allovable stress. For example, for linear designs with SA 36 material, a 3/8-in. fillet on a maximum loaded joint would have to be increased to 9/16 in. using the 1974 criteria.

4 The later code edition for these paragraphs deletes the requirements

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to reduce the allowable stress in the through-thickness direction.

Ic This, in effect, reduces the weld size. It recognises that smaller welds induce less residual or shrinkage stress in the weld joints and that this has a more beneficial effect than a larger weld with lower calculated stresses.

Most pipe support designs utilize tubing with a wall thickness of 1/2 in, or less, with 3/8 in, or less fillet welds; thus, joint con-straint is not a factor. Lamellar tearing is usually a factor in heavy weldsents with constrained joints in plates in excess of 1-in.

thickness. Most pipe support designs are not in that category.

Related Requirements Article NF-1000 - Introduction This article addresses scope, owner's responsibility, bounda-ries, and types of supports and attachments and is not affected by the deletion of a rule for a calculation of a specific type of stress. Therefore, there are no related requirements af-facted by this change.

Article NF-2000 - Materials The deletion of the rules to apply special acceptance criteria to a specific type of stress does not in itself compromise any

' code materials, i.e., no materials have been added or deleted l.

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J because of this code change. Therefore, there are no related ,

s requirements affected by this change. l Article NF-3000 - Desian No other stress criteria has been added or deleted in the Win-ter 1978 addenda or later to compensate for this change.

Therefore, there are no related requirements in this article affected by this change.

The alternates to the Code of Record addressed in this part of the report address Class 1 plate and shell and Class 1 linear supports. Through thickness stresses for Class 2 and MC and i for Class 3 are addressed in subparagraph NF-3391.1 for plate and shell designs and subparafraph NF-3392.1 for . linear designs.

Article NF-4000 - Fabrication and Installation There are no applicable relsted requirements in the Winter 1978 Addenda. In the Winter 1982 Addenda, however, specific direc-

tion for fabrication of the this type of joint was added by requiring any of the following ultrasonic examination of the bore material after welding, weld overlay, special weld deposit techniques, or special material requirements. This later code requirement is not a requirement of the Winter 1978 Addenda and was not invoked because, as stated above, most of the attach-ment welds are load limited by the size of the attached member

(' , to 3/8-in. maximum, for a fillet, and properly applied welds of this size are not considered to cause through-thickness failures.

Article NF-5000 - Examination The Winter 1978 Addenda of this article is more restrictive for welds with a groove or throat dimension of 1 in, or greater, requiring surface examination instead of visual examination.

However, since there are virtually no pipe support welds of this size on the project, the examination paragraphs of this addenda were not invoked.

This article addressed examination of these type joints in the Winter 1982 Addenda by providing ultrasonic examination crite-ria for base metals under welds, which loaded plates thicker than 1 in. to be used, if required, by Article NA-4000. For the reasons stated above, this related requirement is not

' invoked.

Considering the above, the related requirements have been addressed.

Article NF-8000 - Nameplates. Stampina. and Reports i

l There are no related requirements affected by this change.

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4 e Subsection NA

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There are no related requirements affected by this change.

Appendices The related requirements in Appendix XVII are addressed auto-natically by reference in Subsection NT. There are no other requirements in the appendices related to this change.

5. 1977 Edition - Winter 1979 Addenda

Subparagraph NT-3391.1 - Allowable Stress Limits Subparagraph NT-3392.1 - Allowable Stress Limits See prior discussion on through-thickness stresses. These para-

graphs apply to Class 2 and MC plate and shell (NF-3391.1) and lin-ear (NF-3392.1) support designs.

6. 1977 Edition - Winter 1979 Addenda

Subparagraph XVII-2454(C) - Butt and Groove Weld I This reflects new code requirements which recognize an original con-servatism in the minimum thickness requirements for single- or l double-bevel groove welds. The concern was that small welds joining

large members could have been more susceptible to weld cracks in root passes due to a high cooling rate caused by the heat sink of

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the materials being joined. While this is still a basic concern of I \ any weld, the code requirements were judged to be overly conserva-

{ tive and changed to bring the requirements into line with current i industry practices, e.g. AWS-79, Table 2.10.3.

l i Typical differences are shown belows i

Minimus Weld Site Requirements 1

Material 1974 Code Winter 1979 Addenda Thickness. ti te = /ti/6 Table XVII 2452.1-1 3/8 .25 .187 1/2 .288 .187 i

3/4 .354 .25 Related Requirements

Article NF-1000 - Introduction i

There are no related requirements affected by this change.

Article NF-2000 - Materials No materials have been added or deleted nor have there been any ;

changes to the subsections on test coupons, fracture toughness, welding, or examination, which are related to the reduction in k

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o minimum weld size. Therefore, there are no requirements directly related to this change.

Article NF-3000 - Desian No other stress criteria has been added or deleted to compen-sate for this change. Therefore, there are no requirements directly related to this change.

Article NF-4000 - Fabrication and Installation I

There are no related requirements affected by this change.

Article NF-5000 - Examination There are no related requirements affected by this change.

Article NF-8000 - Nameplates. Stampina. and Reports There are no related requirements affected by this change.

Subsection NA There are no related requirements affected by this change.

Appendices

This change is in Appendix XVII and there are no related re-(s i quirements in this or any other appendix affected by this change.

7. 1980 Edition Par.agraph NF-1133 - Intervening Elements in Relation to Jurisdic-tional Boundaries Subparagraph NF-1131.6 - Portion F Intervening elements were introduced into Section III of the ASME Code through Code Case N-199 and the Summer 1978 Addenda to allow items in the load path to be used when these itees met other stan-dards or were not appropriate for Section III. The appropriate paragraphs of the 1980 Edition were invoked in order to apply this concept to the project.

Related Requirements Article NF-1000 - Introduction There are related requirements. They are contained in para-grapt.s NF-1111, Owners' Responsibility for Component Supports, and NT-1112, Owners' Review. They require that the Owner 1) ensure that the intervening elements are adequately designed:

2) provide specific information in the design specification; and 3) see to it that a design report is provided.

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The method for meeting these related requirements is contained I

in CPFF-6 and CPPF-9. '

1 Article NF-2000 - Materials No materials have been added or deleted nor have there been any changes to the subsections on test coupons, fracture toughness, welding, or esamination, which are directly related to inter-vening elements. Therefore, there are no related requirements affected by this change.

Article NF-3000 - Desian No other stress criteria has been added or deleted to compen-sete for this change. N refore, there are no related require-meats affected by this change.

Article NF-4000 - Fabrication and Installation N re are no related requirements affected by this change.

Article NF-5000 - Examination N re are no related requirements affected by this change. P Article NF-4000 - Nameplates. Stampina, and Reports l N re are no related requirements affected by this change.

Subsection NA There are no related requirements affected by this change.

1 Appendices There are no related requirements affected by this change. !

i

8. 1980 Edition Paragraph XVII-2462 - Minimum Edge Distance !

This paragraph provides minimum required edge distances for bolt hole location relative to the edge of the esterial. The 1974 Edi-tion provided Table XVII-2464.5, which provided stnisua edge dis-tances for given bolt diameters. Code Case N 111(1729) was approved for use on November 3,1975, and provided an alternative to the ta- ,

bla. N code case was incorporated into the code in the Summer l' 1976 Addenda. The alternative to the original tabular criteria al-lows a shorter hole-to-edge distance if three criteria, which ad-dress ultimate strength, material thickness, and bearing load on the edge of the hole are satisfied.

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o Related Requirements Article NF-1000 - Introduction

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N re are ao related requirements affected by this change.

. Article NF-2000 - Materials No materials have been added or deleted nor have there been any

., . changes to the subsections on test coupons, fracture toughness, weldias, or esamination, which are directly related to stateus edge distance criteria. Therefore, there are no requirements directly related to this change.

Article NF-3000 - Desian No other stress criteria has been added or deleted to compen-sate for this change. N refore, there are no requirements directly related to this change.

Article NF-4000 - Fabrication and Installation N re are no related requirements affected by this change.

Article NF-5000 - Examination

- There are ao related requirements affected by this change.

Article NT-8000 - Namesistes. Stampina, and Reports N re are no related requirements affected by this change.

i Subsection NA There are ao related requirements affected by this change.

1 Appendices l This change is in Appendix XVII and there are no related re-quirements la this or any other appendix af fected by this change.

9. 1983 Edition - Summer 1983 Addenda Subparagraph NF-3225.1 - Design Limits (Design of Bolting)

Subparagraph NF-3225.2 - Service Limits Levels A through D Subparagraph NF-3324.6 - Design Requirements for Bolted Joints Table NF-3225.2 Stress Limit Factors N Summer 1983 Addenda is invoked for the design of bolting to en-able the higher allowable stresses in the 1980 Edition to be used in support designs. In particular, Appendix F was upgraded by the ad-dition of explicit requirements for bolting design and the raising of the esminue allc,weble from 0.625 Su to 0.7 Su, the original 2019-1545405-E04 13

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. Winter 1974 Addenda allowable. Also, for bolts loaded in combined tension and shear, the straight-line interaction curve of the Winter 1974 Addeada has been replaced by an interaction curve of the i second degree. The newer code provides a clearer treatment of the I subject. It also facilitates the use of the newer cede terminology of design limits and service limits, which has replaced the earlier concept of design and operating conditions.

Related Requirements Article NF-1000 - Introduction There are ao related requirements affected by this change.

Article NF-2000 - Materials .

No materials have been added or deleted nor have there been any chasses to the subsections on test coupons, fracture toaghness, welding, or examination, which are related to the design of boltias. Therefore, there are ao related requirements affected by this change.

Article NF-3000 - Desian No other stress criteria has been added or deleted to compen-sete for this change. Therefore, there are no related require-meats affected by this change.

( Article NF-4000 - Fabrication and Installation There are no related requirements affected by this change.

Article NT-5000 - Examination There are no related requirements affected by this change.

Article NT-8000 - Nameplates. Stampina, and Reports There are no related requirements affected by this change.

Subsection NA There are no related requirements affected by this change.

Appendices The related requirements in Appendix F are addressed automati-cally by specific direction in Table NT-3225.2-1,

10. 1933 Edition - Summer 1985 Addenda Paragraph NT-4721 - Bolt Holes In 1974, this paragraph addressed only oversized holes and a method

of fabricating holes. The Sususer 1985 criteria provides more detail 2019-1545405-NC4 14

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P on hole size requirements, provides new criteria for long-slotted and short-slotted holes, addresses holes for concrete anchors and holes for no-shear applications, and provides direction for use of washers. This newer criteria provides clearer direction and greater flexibility in the support designs.

Related Requirements Article NF-1000 - Introduction There are no related requirements affected by this change.

Article NF-2000 - Materials No materials have been added or deleted nor have there been any changes to the subsections on test coupons, fracture toughness, welding, or examination, which are directly related to bolt hole clearances. Therefore, there are no related requirements affected by this change.

Article NF-3000 - Desian No other stress criteria has been added or deleted to compen-sate for this change. Therefore, there are no related require-ments affected by this change.

Article NF-4000 - Fabrication and Installation There are no related requirements affected by this change. k Article NF-5000 - Examination There are no related requirements affected by this change.

Article NF-8000 - Nameplates. Stamping, and Reports

~

There are no related requirements affected by this change.

Subsection NA There are no related requirements affected by this change.

Appendices There are no related requirements affected by this change. d

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ML20207S121

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