• Author / Uploaded
• masoud132

Citation preview

MSS SP-1 00-201 5

Qualification Requirements for Elastomer Diaphragms for Nuclear Service Diaphragm Valves

Standard Practice Developed and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 1 27 Park Street, NE Vienna, Virginia 221 80-4602 Phone: (703) 281 -661 3 Fax: (703) 281 -6671 E-mail: [email protected] Manufacturers Standardization Society of the Valve and Fittings Industry.

www.msshq.org

MSS

STANDARD PRACTICE

SP-1 00

This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 406 and the MSS Coordinating Committee. The content of this Standard Practice is the resulting efforts of competent and experienced volunteers to provide an effective, clear, and non-exclusive standard that will benefit the industry as a whole.

This

MSS Standard Practice describes minimal requirements and is intended as a basis for common practice by the manufacturer, the user, and the general public. The existence of an MSS Standard Practice does not in itself preclude the manufacture, sale, or use of products not conforming to the Standard Practice. Mandatory conformance to this Standard Practice is established only by reference in other documents such as a code, specification, sales contract, or public law, as applicable.

MSS has no power, nor does it undertake, to enforce or certify compliance with this

document. Any certification or other statement of compliance with the requirements of this Standard Practice shall not be attributable to MSS and is solely the responsibility of the certifier or maker of the statement.

“Unless indicated otherwise within this MSS Standard Practice, other standards documents referenced to herein are identified by the date of issue that was applicable to this Standard Practice at the date of approval of this MSS Standard Practice (see Annex A). This Standard Practice shall remain silent on the validity of those other standards of prior or subsequent dates of issue even though applicable provisions may not have changed. ” B y publication of this S tandard Practice, no position is taken with respect to the validity of any potential claim(s) or of any patent rights in connection therewith. rights.

MS S shall not be held responsible for identifying any patent

Users are expressly advised that determination of patent rights and the risk of infringement of such rights

are entirely their responsibility.

In this S tandard Practice, all text, notes, annexes, tables, figures, and references are construed to be essential to the

understanding

“supplemental”.

of

the

message

of

the

standard,

and

are

considered

normative

unless

indicated

All appendices, if included, that appear in this document are construed as “supplemental”.

as

Note

that supplemental information does not include mandatory requirements.

Substantive changes in this 201 5 edition are “flagged” by parallel bars as shown on the margins of this paragraph.

The specific detail of the change may be

determined by comparing the material flagged with that in the previous edition.

Excerpts of this Standard Practice may be quoted with permission. Credit lines should read ‘Extracted from MSS SP-100-2015 with permission of the publisher, Manufacturers Standardization Society of the Valve and Fittings Industry'. Reproduction and/or electronic transmission or dissemination is prohibited under copyright convention unless written permission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. MS S is a registered trademark of Manufacturers S tandardization S ociety of the Valve and Fittings Industry, Inc.

Originally Approved: June 1 98 8 Originally Published: S eptember 1 98 8 Current Edition Approved: August 201 5 Current Edition Published: December 201 5

Copyright ©, 201 5 by Manufacturers S tandardization S ociety of the Valve and Fittings Industry, Inc. Printed in U. S . A.

i

Manufacturers Standardization Society of the Valve and Fittings Industry.

MSS

STANDARD PRACTICE

SP-1 00

TABLE OF CONTENTS

SECTION 1

PAGE

S COPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2

QUALIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3

PRODUCTION REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

4

S ERVICE LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

5

MARKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

6

DOCUMENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ANNEX A

Referenced S tandards and Applicable Dates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

ii

Manufacturers Standardization Society of the Valve and Fittings Industry.

MSS

STANDARD PRACTICE

SP-1 00

QUALIFICATION REQUIREMENTS FOR ELASTOMER DIAPHRAGMS FOR NUCLEAR SERVICE DIAPHRAGM VALVES

SCOPE

1.

This S tandard Practice delineates a method for qualification of elastomer diaphragms, in accordance with methodology and documentation as described in Appendix QR-B of AS ME QME- 1 , that are intended for use in AS ME B oiler and Pressure Vessel Code, S ection III, Classes 2 and 3 diaphragm valves.

In addition, this S tandard Practice establishes methods for production verification and for the

development of service limits for Elastomer diaphragms.

NOTE

:

S ee MS S S P-96, “

Guidelines on Terminology for Valves and Fittings” for definitions of common terms

and acronyms used in this S tandard Practice.

QUALIFICATION

2.

2. 1

The valve manufacturer s hall p rep are a tes t p lan that details the p ro cedures used to co mp ly

with the required tes ts o f S ectio n 2 . 2 .

The tes t p lan s hall s tate the ratio nale us ed to s elect the thermal

aging temperature and time, radiation aging total dose, and pressure and temperature for the wear aging or c yc le life test.

2. 2

A specific diaphragm size, compound, design, and construction may be qualified by type testing.

For each qualification step, testing shall be conducted on representative production diaphragms. This type testing shall include: 2. 2. 1

Thermal aging to qualify for a minimum period of time, as specified in S ection 4. 0.

aging test should be based on

2. 2. 2

Arrhenius Law to

The thermal

determine aging time and temperature.

Radiation aging to a total dose level at least equal to the requirements of the Design S pecification

or a dose level equivalent to the service life, as specified in S ection 4. 0.

2. 2. 3

Wear aging to qualify the elastomer diaphragm for the service life limitations, as specified in

S ection

4. 0.

The

wear aging

test shall

include

the

effects

of pressure,

temperature,

and cycles,

simultaneously.

2. 3

Eac h size diap hragm s hall b e sub j ected to a b as eline life cyc le tes t at a p ress ure and temp erature

established by the valve manufacturer.

This test data will be used to establish acceptance criteria for the

production lot cyclic test specified in S ection 3 . 1 . 4.

2. 4

Thermal aging and wear testing conducted at two different pressure/temperature combinations may

be used to qualify the diaphragm for all conditions enveloped by the two points with equal or less radiation exposure.

PRODUCTION REQUIREMENTS

3.

3.1

To verify that production diaphragms are equivalent to diaphragms qualified by the procedures for

S ection 2. 0, the following minimum requirements shall be met:

3.1 .1

Certification of compound by Certificate of Compliance from the diaphragm manufacturer for

each batch.

3.1 .2

Verification of tensile strength, modulus, and elongation properties for each batch of the elastomer

compound, as per AS TM D41 2.

1

Manufacturers Standardization Society of the Valve and Fittings Industry.

MSS

STANDARD PRACTICE 3.1 .3

Production

lot

visual,

dimensional,

and

durometer

SP-1 00

examination

accordance with AS Q Z1 . 4 , General Insp ectio n Level III, AQL 0. 40.

to

sampling

procedure

in

In addition, all diaphragms for

valve sizes over NPS 2 shall be durometer tested in accordance with AS TM D2240.

3 .1 .4

Cycle test one diaphragm from each production lot in accordance to the life cycle test established

in S ection 2. 3 .

SERVICE LIMITATIONS

4.

4. 1

S ervice limitations shall include limitations on diaphragm flexure cycles (full stroking, close-open-

close or open-close-open), time in service, and storage life as follows:

4. 1 . 1

The required diaphragm cycle/flexure life shall not exceed 1 /3 the minimum cycle life established

by the requirements of S ection 2. 0.

4. 1 . 2

The service life of the elastomeric diaphragm shall not exceed five years, and the combined

service and storage life of the diaphragm shall not exceed ten years.

5.

5.1

MARKING Elastomeric diaphragms shall be marked with the month and year of diaphragm manufacture, valve

manufacturer's identification symbol, and elastomer compound identification code or batch code.

6.

6. 1

DOCUMENTATION The testing performed in accordance with the requirements o f S ec tio n 2 . 0 s hall b e do c umented in

a test report that shall include the test plan.

6. 2

An applications report shall be prepared to show the suitability of the specific diaphragm for the

service defined by a Design S pecification.

6. 3

In lieu of compliance with service life required by the Design S pecification, the applications report

shall recommend the required diaphragm replacement life or qualified service life based on time and/or cycles that are based on the data in the test report.

2

Manufacturers Standardization Society of the Valve and Fittings Industry.

MSS

STANDARD PRACTICE

SP-1 00

ANNEX A

Referenced Standards and Applicable Dates This Annex is an integral part of this S tandard Practice and is placed after the main text for convenience.

Standard Name ASME; ANSI/ASME QME-1 -201 2

Description Qualification of Active Mechanical Equipment Used in Nuclear Power Plants

ASQ; ANSI/ASQ Z1 . 4-2003 (R201 3 )

S ampling Procedures and Tables for Inspection by Attributes

ASTM D41 2-06a(201 3 )

S tandard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers – Tension

D2240-05 (201 0)

S tandard Test Method for Rubber Property – Durometer Hardness

MSS; ANSI/MSS S P-96-201 1

Guidelines on Terminology for Valves and Fittings

Publications of the following organizations appear in the above list:

ANS I

American National S tandards Institute, Inc. 25 West 43 rd S treet, Fourth Floor New York, NY 1 003 6-7406

AS Q

American S ociety for Quality 600 North Plankinton Avenue Milwaukee, WI 5 3 203 -291 4

AS ME

American S ociety of Mechanical Engineers (AS ME International) Two Park Avenue New York, NY 1 001 6-5 990

AS TM

AS TM International 1 00 B arr Harbor Drive, P. O. B ox C700 West Conshohocken, PA 1 9428 -295 9

MS S

Manufacturers S tandardization S ociety of the Valve and Fittings Industry 1 27 Park S treet, NE Vienna, VA 221 8 0-4602

3

Manufacturers Standardization Society of the Valve and Fittings Industry.

Purchase or View a Full Listing of MSS Standards at: http: //msshq.org/Store/PriceList.cfm

MSS Standard Practices (SPs) related to or referenced in this publication: ANSI/MSS SP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions ANSI/MSS SP-96 Guidelines on Terminology for Valves and Fittings –––––––––––

American National Standards Published by MSS, an ANSI-accredited Standards Developer: ANSI/MSS SP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions ANSI/MSS SP-44 Steel Pipeline Flanges ANSI/MSS SP-55 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components (including 201 1 Errata Sheet)

ANSI/MSS SP-58 ANSI/MSS SP-96 ANSI/MSS SP-114 ANSI/MSS SP-134 ANSI/MSS SP-138 ANSI/MSS SP-144

– Visual Method for Evaluation of Surface Irregularities Pipe Hangers and Supports - Materials, Design, Manufacture, Selection, Application, and Installation

Corrosion Resistant Pipe Fittings Threaded and Socket Welding Class 150 and 1000 Guidelines on Terminology for Valves and Fittings Valves for Cryogenic Service, including Requirements for Body/Bonnet Extensions Quality Standard Practice for Oxygen Cleaning of Valves and Fittings Pressure Seal Bonnet Valves –––––––––––

Do not violate copyright laws

All Standard Practices are officially available only from MSS and through our authorized distributors:

About MSS

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry is a non-profit technical association organized for development and improvement of industry, national and international codes and standards for Valves, Valve Actuators, Valve Modifications, Pipe Fittings, Flanges, Pipe Hangers and Supports, and Associated Seals.

Since its establishment in 1 924, MSS has

been dedicated to developing standards for national and global applications, in cooperation with other standardizing bodies and regulatory authorities. For more information on membership and eligibility requirements, visit:

http: //msshq. org/Store/Membership. cfm

Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE, Vienna, VA 22180-4620 • (703) 281-6613 • Fax # (703) 281-6671 “The Technical Voice ofthe Industry”

Manufacturers Standardization Society of the Valve and Fittings Industry.

MS S -IHS

S P-1 00-201 5