Mss Sp-67-2017

MSS SP-67-201 7

Butterfly 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]

www.msshq.org

MSS

STANDARD PRACTICE

SP-67

This MS S S tandard Practice was developed under the consensus of the MS S Technical Committee 407 and the MS S Coordinating Committee.

The content of this S tandard 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 MS S S tandard Practice describes minimal requirements and is intended as a basis for common

practice by the manufacturer, the user, and the general public. not in itself preclude the manufacture,

sale,

The existence of an MS S S tandard Practice does

or use of products not conforming to the S tandard Practice.

Mandatory conformance to this S tandard Practice is established only by reference in other documents such as a code, specification, sales contract, or public law, as applicable. enforce or certify compliance with this document.

MS S has no power, nor does it undertake, to

Any certification or other statement of compliance with the

requirements of this S tandard Practice shall not be attributable to MS S 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 B). 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 of the message of the standard, indicated as “supplemental”. “supplemental”.

and are considered normative unless

All appendices, if included, that appear in this document are construed as

Note that supplemental information does not include mandatory requirements.

U. S . customary units in this S tandard Practice are the standard; S I (metric) units are for reference only.

S ubstantive changes in this 201 7 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.

Non-toleranced dimensions in this S tandard Practice are nominal unless otherwise specified.

Excerpts of this Standard Practice may be quoted with permission. Credit lines should read ‘Extracted from MSS SP-67-2017 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. Originally Published: May 1 964 Current Edition Approved: S eptember 201 6 Current Edition Published: May 201 7

MS S is a registered trademark of Manufacturers S tandardization S ociety of the Valve and Fittings Industry, Inc.

Copyright ©, 201 7 by Manufacturers S tandardization S ociety of the Valve and Fittings Industry, Inc. Printed in U. S . A.

i

MSS

STANDARD PRACTICE

SP-67

TABLE OF CONTENTS

SECTION

PAGE

1

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

2

DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3

S TANDARD ENDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

4

DES IGN REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

5

VALVE DIS C CLEARANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

6

TRIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

7

FACE-TO-FACE DIMENS IONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

8

ACTUATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

9

PURCHAS ING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

10

PRODUCTION TES TING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

11

MARKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

TABLE 1

Pipe Minimum Diameters for Disc Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2

Face-to-Face Dimensions, Flanged-End Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3

Face-to-Face Dimensions, S ingle-Flange, and Flangeless Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0

4

End-to-End Dimensions, Grooved-End Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1

A1

Disc-to-Pipe Minimum Clearances

............................................................................................. 1 6

FIGURE 1

Face-to-Face, Flangeless, and S ingle-Flange Valves (includes 1 A, 1 B , and 1 C)

2

Flanged Ends, B olting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3

....................... 1 2

3

S ingle Flanged, B olting Options

4

Flangeless, B olting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3

................................................................................................. 1 3

5

End-to-End, Grooved-End Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4

6

S houldered-End Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4

7

Disc-to-Pipe Minimum Clearance, Typical Concentric Type Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5

ANNEX A

Disc-to-Pipe Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6

B

Reference S tandards and Applicable Dates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7

ii

MSS

STANDARD PRACTICE

SP-67

BUTTERFLY VALVES 1.

1 .1

SCOPE This Standard Practice covers dimensions, design, testing, and marking requirements for butterfly

valves.

1 .2

Further reference should be made to the MS S S P-68 .

This S tandard Practice covers two types of butterfly valves:

Type I – Valves for tight shut-off (

Tested per Section 10. 2. 1 )

(

See Section 10. 2. 2 )

Type II – Valves permitting seat leakage 1 .3

This S tandard Practice covers flangeless (wafer-type) , single-flange (lug-type), and flanged-end

valves in size NPS 1 ½ through NPS 7 2, along with grooved-end valves, and shouldered-end valves, with pressure ratings in accordance with the requirements of S ections 3 and 4.

2.

2. 1

DEFINITIONS

CWP – Cold Working Pressure (PSIG)

The pressure rating for the pressure containing components

of the valve at temperatures up to and including 1 00 °F.

2. 2

Differential Pressure

The difference in pressure between two points located on opposite sides of the

valve disc.

2. 3

Face-to-Face of Valve before Installation

is installed in the pipeline.

This is the dimension of the valve, face-to-face, before it

It does not include the thickness of gaskets if separate gaskets are used.

It does

include the thickness of gaskets or seals that are an integral part of the valve and this dimension is before these gaskets or seals are compressed.

2. 4

Face-to-Face of Valve Installed

in the pipeline.

This is the dimension of the valve, face-to-face, after it is installed

It does not include the thickness of gaskets if separate gaskets are used.

It does include the

thickness of gaskets or seals that are an integral part of the valve; however, this dimension is established with the gaskets or seals compressed.

2. 5

See Figures 1 A, 1 B, 1 C, and Table 3 .

Face-to-Face of Valve and Gaskets Installed

This is the dimens io n of the valve, fac e- to- fac e,

inc luding sep arate gas kets when installed in the p ip eline.

This dimensio n mus t b e e s tab li s he d using

the thickness of the valve’ s face-to-face dimension and the compressed thickness of the gaskets to be used in such installations. 2. 6

2.7

3.

3.1

Shut-OffPressure System Pressure

The maximum rated differential pressure with the valve in the fully closed position.

Maximum specified operating pressure for the application.

STANDARD ENDS Flanged Ends

Valves with this end type shall be compatible for use with flanges conforming to:

ASME B1 6. 1 , Class 25 or 1 25 ; ASME B1 6. 5 , Class 1 5 0; ASME B1 6. 47, Class 1 5 0 Series A; ASME B1 6. 24, Class 1 5 0; ASME B1 6. 42, Class 1 5 0; or AWWA C207.

3.2

Single Flange (Lug-Type)

Figure 2 illustrates bolting options.

Valves with this end type shall be compatible for use with flanges

conforming to: AS ME B 1 6. 1 , Class 25 or 1 25 ; AS ME B 1 6. 5 , Class 1 5 0; AS ME B 1 6. 24, Class 1 5 0; AS ME B 1 6. 42, Class 1 5 0; or AWWA C207.

Figure 3 illustrates bolting options.

1

MSS

STANDARD PRACTICE

3 .3

Flangeless (Wafer-Type)

Valves

with

this

end type

shall

be

SP-67 compatible

for

use

with

flanges

conforming to: AS ME B 1 6. 1 , Class 25 or 1 25 ; AS ME B 1 6. 5 , Class 1 5 0; AS ME B 1 6. 24, Class 1 5 0; AS ME B 1 6. 42, Class 1 5 0; or AWWA C207.

3.4

3.5

Grooved Ends Shouldered Ends

Figure 4 illustrates bolting options.

Valves with this end type shall conform to AWWA C606.

Valves with this end type shall conform to AWWA C606.

DESIGN REQUIREMENTS

4.

4. 1

Wall Thickness

The design requirements of this section apply only to the valve body.

The disc

and shaft are specifically excluded.

4. 1 . 1

Steel, Nickel Alloy and other Special Alloy Valves

4. 1 . 1 . 1

Valves that conform to the applicable requirements of ASME B1 6. 3 4 shall have body pressure-

temperature ratings in accordance with that standard.

For valves that do not conform to the applicable

requirements of ASME B1 6. 3 4, then Section 4. 1 . 1 . 2 or 4. 1 . 1 . 3 of this S tandard Practice shall be used to determine the minimum required wall thickness.

4. 1 . 1 . 2

Valves that do not conform to the applicable requirements of AS ME B 1 6. 3 4 shall have their

minimum wall thickness determined using the following equation:

t

 1 .5

Pd 2S

 1 .2P

Where: P = Pressure rating at temperature under consideration, psi d = Inside diameter of valve body (or shaft bore in body for the body neck of flangeless valves), in. S = Allowable stress, psi

The allowable stress shall be taken from the ASME Boiler and Pressure Vessel Code (BPVC), Section I (or if not listed, use Section VIII, Division I).

If the material is not listed in either of these Code sections,

then the allowable stress shall be determined using the method contained in ASME BPVC, Section VIII, Division I, Appendix P. For cast materials, use the appropriate casting quality factor from UG-24 of ASME BPVC, Section VIII, Division I.

4. 1 . 1 . 3

As an alternative to Section 4. 1 . 1 . 2, valves that do not conform to the applicable requirements of

ASME B1 6. 3 4 shall have the maximum allowable pressure determined by using a proof test in accordance with UG-1 01 of ASME BPVC, Section VIII, Division I.

4. 1 . 2

Bronze and Bronze Alloy Valves

4. 1 . 2. 1

Valves that conform to the applicable requirements of ASME B1 6. 24 shall have body pressure-

temperature ratings in accordance with that s tandard.

F o r valve s that do no t c o nfo rm to the applicable

requirements of ASME B1 6. 24, then Sections 4. 1 . 2. 2 or 4. 1 . 2. 3 of this S tandard Practice shall be used to determine the minimum required wall thickness.

4. 1 . 2. 2

Valves that do not conform to the applicable requirements of AS ME B 1 6. 24 shall have the

minimum wall thickness determined using methods that result in designs which are as conservative as those used in that standard.

4. 1 . 2. 3

As an alternative to Section 4. 1 . 2. 2, valves that do not conform to the applicable requirements of

ASME B1 6. 24 shall have the maximum allowable pressure determined by using a proof test in accordance with UG-1 01 of ASME BPVC, Section VIII, Division I.

2

MSS

STANDARD PRACTICE

4. 1 . 3

SP-67

Cast Iron Valves

4. 1 . 3 . 1

Valves that conform to the applicable requirements of AS ME B 1 6. 1 or AWWA C5 04 shall

conform to the body pressure-temperature requirements in accordance with the respective standard.

For

valves that do not conform to the applicable requirements of AS ME B 1 6. 1 or AWWA C5 04, then S ections 4. 1 . 3 . 2 or 4. 1 . 3 . 3 of this S tandard Practice shall be used to determine the minimum required wall thickness.

4. 1 . 3 . 2

Valves that do not conform to the applicable requirements of AS ME B 1 6. 1 or AWWA C5 04

shall have the minimum wall thickness determined by using methods which result in designs that are as conservative as those used in these standards.

4. 1 . 3 . 3

As an alternative to S ection 4. 1 . 3 . 2, valves that do not conform to the applicable requirements

of AS ME B 1 6. 1 or AWWA C5 04 shall have the maximum allowable pressure determined by using a proof test in accordance with UG-1 01 of AS ME BPVC, S ection VIII, Division I.

4. 1 . 4

Ductile Iron Valves

4. 1 . 4. 1

Valves that conform to the applicable requirements of AS ME B 1 6. 42 or AWWA C5 04 shall

conform to the body pressure-temperature requirements in accordance with the respective s tandard.

For

valves that do no t co nfo rm to the applicable requirements of AS ME B 1 6. 42 or AWWA C5 04, then S ections 4. 1 . 4. 2 or 4. 1 . 4. 3 of this S tandard Practice shall be used to determine the minimum required wall thickness.

4. 1 . 4. 2

Valves that do not conform to the applicable requirements of AS ME B 1 6. 42 or AWWA C5 04

shall have the minimum wall thickness determined by using methods that result in designs which are as conservative as those used in these standards.

4. 1 . 4. 3

Reference Annex C of AS ME B 1 6. 42.

As an alternative to S ection 4. 1 . 4. 2, valves that do not conform to the applicable requirements

of AS ME B 1 6. 42 or AWWA C5 04 shall have the maximum allowable pressure determined by using a proof test in accordance with UCD-1 01 of AS ME B PVC, S ection VIII, Division I.

4. 1 . 5

Reduced Body Wall Thickness

4. 1 . 5 . 1

The body material thickness between the shaft bore in the body and adj acent bolt holes shall not be

less than 25% of the required wall thickness of the body neck.

4. 2

Flange Thickness

If materials other than tho se listed in the flange standards in S ec tio n 2 are used

for flanged-end valves, the minimum flange thickness shall be determined by using methods that are as conservative as those used in the standard appropriate for the material of construction. the

minimum

flange

thickness

be

less

than that listed in

the

standard for the

In no case shall

flange

rating

under

consideration.

4. 3

Pressure Rating

Valves may be designed for shut-off pressure rating or differential pressures lower

than the body pressure rating.

This pressure rating shall be so marked in accordance with S ection 1 1 of

this S tandard Practice. Flange ratings other than those listed in the flange standards in Annex B are outside the scope of this S tandard Practice.

4. 4

Flange Bolting

4. 4. 1

Cast iron, ductile iron, and non-ferrous valves with threaded body flange bolt holes shall have

these holes drilled and tapped in accordance with AS ME B 1 . 1 , Coarse Thread S eries, Class 2B .

4. 4. 2

S teel valves, all classes, with threaded body flange bolt holes intended for use with alloy steel

bolting shall be drilled and tapped in accordance with AS ME B 1 . 1 , Coarse Thread S eries, Class 2B for bolts 1 in. and smaller, and shall be tapped to the 8 -Thread S eries, Class 2B for bolts 1

3

1

8

in. and larger.

MSS

STANDARD PRACTICE

4. 4. 3

SP-67

S teel valves limited by use of organic materials of construction to service temperatures below

5 00 ° F (260 ° C) where carbon steel bolting can be used, may be tapped in accordance with ASME B1 . 1 , Coarse Thread Series, Class 2B for all bolt sizes.

4. 5

Stems

S tem retention and strength shall meet the requirements of ASME B 1 6. 3 4.

The design shall

not rely on actuation components (e. g. , gear operators, actuators, levers, etc. ) to prevent ej ection.

4. 6

Retention by Stem Seal Element

Valves shall be designed so that the stem seal retaining fasteners

(e. g. , packing gland fasteners) alone do not retain the stem.

S pecifically, the design shall be such that the

stem shall not be capable of removal from the valve while the valve is under pressure by the removal of the stem seal retainer (e. g. , gland) alone.

4. 7

Retention by Closure Member

Valves, including those intended for isolation, regulation, or flow

reversal, shall be provided with a means so that in the event of a structural failure of the stem or the stemto-closure attachment items, the stem will not be ej ected through the pressure boundary while the valve is under pressure.

5.

5.1

VALVE DISC CLEARANCE B utterfly valve discs may upon rotation proj ect beyond the body flange faces, and therefore, caution

should be exercised by the user to insure there is no interference between the butterfly valve disc and adj acent components, such as lined piping, strainers, check valves, and other types of valves. Also, mating pipe flanges must be aligned prior to tightening of flange bolts.

5.2

All valves shall be designed for suitable clearance according to the pipe inside diameters shown in

Table 1 , and in accordance with Annex A and Figure 7.

6.

6. 1

TRIM Trim materials shall be suitable for the service conditions and shall be at the manufacturer's option

unless specified. Trim shall be defined as comprising shafts, bushings, body seating surfaces, discs or disc seating surfaces, internal keys, pins, and screws in contact with the line fluid. the disc may be separate or integral.

7.

7. 1

S eats in the body and on

S eat facings may be applied to bodies and/or discs.

FACE-TO-FACE DIMENSIONS Flanged-End Valves

Face-to-Face dimensions and tolerances for flanged-end valves are listed in

Table 2.

7. 2

Flangeless (Wafer-Type) Valves

listed in Table 3 .

Face-to-Face dimensions and tolerances for flangeless valves are

Figures 1 A and 1 B illustrate valves with integral seals or gaskets.

Figure 1 C illustrates

valves that require separate gaskets.

7. 3

Single Flange (Lug-Type) Valves

Face-to-Face dimensions and tolerances for single-flange valves

are listed in Table 3 . Figures lA and 1 B illustrate valves with integral seals or gaskets. Figure 1 C illustrates valves that require separate gaskets.

7. 4

7. 5

Grooved-End Valves Shouldered-End Valves

Configuration for grooved-end valves is shown in Figure 5 .

Configuration for shouldered-end valves is shown in Figure 6.

4

MSS 8.

8.1

STANDARD PRACTICE

ACTUATORS Actuators

used

with

valves

applicable

to

this

S tandard

Practice

SP-67 shall

be

self-locking

or have

provisions to prevent unwanted disc movement during normal operating conditions.

8.2

Many factors such as flow media, operating pressures, fluid velocities, and location in the pipeline

affect the operating torque of the valve.

These conditions must be considered when sizing the actuator.

S ee MS S S P-91 for guidelines in selecting manual actuators.

9.

9. 1

PURCHASING INFORMATION In order to enable the manufacturer to properly supply valves for the application, the purchaser shall

furnish the following information: a)

S tandard to be used

b)

S ize of valve

c)

Type of valve (see S ection 1 )

d)

Type of end connection (see Section 3 ) If flanged end, specify narrow or wide, or extra wide from Table 2.

e)

Connecting pipe material (see Table 1 )

f)

B ody line pressure

g)

S hut-off pressure (see S ection 4. 3 )

h)

Type and temperature of line fluid to be handled

i)

Flow conditions: 1.

For on-off service: Maximum flow

2.

For regulating service: Maximum flow at maximum pressure drop; minimum flow at maximum pressure drop; maximum flow at minimum pressure drop

3.

Whether valve is in closed system or subj ect to free discharge

j)

Type of actuator

k)

Method of Operation:

1)

1.

Frequency

2.

Opening Time

3.

Closing Time

For manual operation: Direction of closing

m)

S tem orientation (horizontal/vertical, etc. )

n)

B uried or submerged service (if applicable)

o)

Allowable leakage for Type II valves (see S ection 1 0. 2. 2)

5

MSS

STANDARD PRACTICE

PRODUCTION TESTING

1 0.

1 0. 1

Shell Test

one half (1

1

2 )

SP-67

Each assembled valve shall be subj ected to a pressure test at a minimum of one and

times the body design cold working pressure for the duration specified.

The test shall be

made with water which may contain a corrosion inhibitor, with kerosene, or with other suitable liquid, provided its viscosity is no greater than that of water. inert gas as the test medium.

The manufacturer at his option may use air or

This shell test shall be conducted at ambient temperature with the disc in

the partially open position. As an alternative, the body may be tested prior to assembly. shall be allowed.

No visible leakage through the body wall

Leakage through the shaft seal shall not be cause for rej ection.

The duration of the shell test shall be no less than:

VALVE SIZE (NPS )

TIME 1A, 1C, 2, 3, Figures 1B, 5, and 6 Figuresand 4 (seconds)

2 and Smaller 2

1

2

to 8

1 0 and Larger

1 0. 2

Seat Test Type I Valves

1 0. 2. 1

15

15

30

60

60

1 80

Each valve that is furnished for tight shut-off service shall be tested in the closed

position to a pressure equal to at least the rated system pressure for the duration specified below.

The

test shall be made with water which may contain a corrosion inhibitor, with kerosene, or with other suitable liquid provided its viscosity is no greater than that of water. The manufacturer, at their option, may use air or inert gas as the test medium.

The test shall be conducted

in a manner that will test the tightness of the seat in the direction of flow, as indicated on the valve. For valves designed to close against pressure from either direction, the pressure shall be applied across the valve disc in the direction producing the most adverse seating condition.

This test shall be made at

ambient temperature with the seats clean and free of oil, grease, or any sealant. If the test fluid is a liquid, there shall be no visible evidence of drops or wetting through the disc, nor leakage past the seat.

When air or inert gas is the test medium, there shall be no visible formation of

bubbles when the closure is either covered with water or coated with a soap or similar solution. The duration of the seat test shall be no less than:

1 0. 2. 2

Type II Valves

VALVE SIZE

TIME

(NPS )

(seconds)

1 2 and S maller

15

1 4 to 24

30

Larger than 24

60

Valves that permit seat leakage shall not be subj ected to a seat test unless

specified by the purchaser.

When so specified, valves shall be tested as agreed upon by the purchaser

and the manufacturer.

6

MSS

STANDARD PRACTICE

1 0. 3

Shaft Seal Test

SP-67

Each valve shall not be required to pass a shaft seal test; however, the manufacturer

shall be able to demonstrate that the shaft seal is capable of sealing at 1 . 1 times the rated cold working pressure.

11.

1 1 .1

MARKING Valves shall be marked as applicable in accordance with AS ME B 1 6. 3 4 or MS S S P-25 ; except that

in the case where the maximum differential shut-off pressure and/or temperature is less than the body pressure and temperature rating, then such limitations must be shown on the valve. information may be on an identification plate attached to the valve.

7

If necessary, this

MSS

STANDARD PRACTICE

SP-67

TABLE 1

Pipe Minimum Diameters for Disc Clearance

Minimum Pipe Inside Diameters Unlined Ductile Iron Pipe Unlined Steel Pipe Minimum Pressure Class Special Class Pressure Class 350 53 in. mm in. mm in. mm in. mm (d)

Pipe Size (NPS )

(

a)

Unlined Gray Iron Pipe (b)(d)

in. 1

2

mm

(d)(e)(f)(g)(h)

(c)(d)

–

–

1 . 61

40. 9

–

–

–

–

–

–

2

–

–

2. 07

5 2. 6

–

–

–

–

–

–

1

–

–

2. 47

62. 7

–

–

–

–

–

–

1

2

2

3

3 . 26

8 2. 8

3 . 07

78 . 0

3 . 40

8 6. 4

3 . 40

8 6. 4

3 . 28

83 .3

4

4. 04

1 02. 6

4. 03

1 02. 4

4. 24

1 07. 7

4. 24

1 07. 7

4. 1 0

1 04. 1

5 . 05

1 28 . 3

5

–

–

–

–

–

–

–

–

6

6. 08

1 5 4. 4

6. 07

1 5 4. 2

6. 3 4

1 61 . 0

6. 3 4

1 61 . 0

6. 1 6

1 5 6. 5

8

8.1 1

206. 0

7. 98

202. 7

8 . 49

21 5 . 6

8 . 49

21 5 . 6

8 . 27

21 0. 1

10

1 0. 00

25 4. 0

1 0. 02

25 4. 5

1 0. 5 2

267. 2

1 0. 5 2

267. 2

1 0. 28

261 . 1

12

1 2. 02

3 05 . 3

1 1 . 94

3 03 . 3

1 2. 5 8

3 1 9. 5

1 2. 5 8

3 1 9. 5

1 2. 3 4

31 3.4

14

1 3 . 94

3 5 4. 1

1 3 . 25

3 3 6. 6

1 4. 66

3 72. 4

1 4. 60

3 70. 8

1 4. 3 8

3 65 . 3

16

1 5.86

402. 8

1 5 . 25

3 8 7. 4

1 6. 72

424. 7

1 6. 64

422. 7

1 6. 46

41 8 . 1

18

1 7. 8 4

45 3 . 1

1 7. 25

43 8 . 2

1 8.80

477. 5

1 8 . 70

475 . 0

1 8.54

470. 9

20

1 9. 8 4

5 03 . 9

1 9. 25

48 9. 0

20. 8 6

5 29. 8

20. 76

5 27. 3

20. 62

5 23 . 7

24

23 . 8 8

606. 6

23 . 25

5 90. 6

25 . 06

63 6. 5

24. 8 6

63 1 . 4

24. 78

629. 4

30

29. 90

75 9. 5

29. 25

743 . 0

3 1 . 26

794. 0

3 0. 96

78 6. 4

3 0. 92

78 5 . 4

36

3 5 . 90

91 1 . 9

3 5 . 25

8 95 . 4

3 7. 48

95 2. 0

3 7. 1 2

942. 8

3 7. 08

941 . 8

42

41 . 90

1 064. 3

41 . 24

1 047. 5

43 . 62

1 1 07. 9

43 . 1 8

1 096. 8

43 . 1 4

1 095 . 8

48

47. 90

1 21 6. 7

47. 25

1 200. 2

49. 8 2

1 265 . 4

49. 3 4

1 25 3 . 2

49. 3 0

1 25 2. 2

54

5 3 . 90

1 3 69. 1

–

–

5 6. 44

1 43 3 . 6

55.88

1 41 9. 4

55.84

1 41 8 . 3

60

5 9. 90

1 5 21 . 5

–

–

60. 43

1 5 3 4. 9

5 9. 8 5

1 5 20. 2

–

–

64

–

–

–

64. 45

1 63 7. 0

63 . 8 3

1 621 . 3

–

–

66

65 . 90

1 673 . 9

–

–

–

–

–

–

–

–

72

71 . 90

1 8 26. 3

–

–

–

–

–

–

–

–

NOTES:

–

(a) For valve sizes not covered by pipe data in Table 1 , caution must be exercised as required in S ection 5 to insure there is no interference between piping I. D. and valve disc. (b) Diameters for the valves sizes NPS 3 through NPS 24 were calculated from Tables 6. 4, and 6. 5 of AWWA C1 06/A21 . 6 (withdrawn in 1 98 2) with allowance for the specified tolerances to get the smallest I. D. as follows: NPS 3 – NPS 6: Thickness Class 22

NPS 1 0 – NPS 1 2: Thickness Class 24

NPS 8 : Thickness Class 23

NPS 1 4: Thickness Class 25

NPS 1 6 – NPS 24: Thickness Class 26

Diameters for valve sizes NPS 3 0 through NPS 60 were calculated from AWWA C1 02/A21 . 2 (withdrawn 1 967) with allowances for the specified tolerances to get the smallest I. D. Diameters for valves sizes NPS 66 through NPS 72 are extrapolated based on the consistency of size NPS 3 0 and larger.

Table 1 notes continued on next page 8

MSS

STANDARD PRACTICE

SP-67

Table 1 notes continued below (c) Diameters are calculated subtracting twice the nominal wall thickness from the outside diameter as specified for standard pipe in Table 1 of AS ME B 3 6. 1 0M. (d) Pipe dimensional data in Table 1 is for

unlined pipe.

The maj ority of Gray Iron (i. e. , AWWA C1 06/A21 . 6) and Ductile Iron

Pipe (i. e. , AWWA C1 5 1 /A21 . 5 1 ) include a cement mortar lining.

For valve installations with lined pipelines, caution must

be exercised as required in S ection 5 to insure there is no interference between the piping and the valve disc. (e) Ductile iron pipe diameters are calculated by subtracting the AWWA C1 5 1 /A21 . 5 1 negative O. D. tolerance and twice the nominal wall thickness from the nominal O. D. (f)

The minimum nominal wall thickness of ductile iron pipe, flanged in accordance with AWWA C1 1 5 /A21 . 1 5 , is S pecial Class 5 3 for NPS 3 through NPS 5 4 and Pressure Class 3 5 0 for NPS 60 and NPS 64.

(g) NPS 64 ductile iron pipe flanged in accordance with AWWA C1 1 5 /A21 . 1 5 have NPS 66 flanges.

If an NPS 66 butterfly

valve is used with this pipe, careful consideration should be given to disc clearance. (h) Ductile iron pipe is available in classes other than those listed in Table 1 .

When using other classes, consult the valve/pipe

manufacturer for clearance requirements.

TABLE 2

Face-to-Face Dimensions, Flanged-End Valves

Valve Size (NPS ) 1

1

2

2 2

1

2

Narrow Face-to-Face in. mm

Wide Face-to-Face in. mm

–

–

–

–

–

–

–

–

–

–

–

3

5 . 00

–

1 27. 0

5 . 00

1 27. 0

4

5 . 00

1 27. 0

7. 00

1 77. 8

5

5 . 00

1 27. 0

7. 5 0

1 90. 5

6

5 . 00

1 27. 0

8 . 00

203 . 2

8

6. 00

1 5 2. 4

8.50

21 5 . 9

10

8 . 00

203 . 2

1 5 . 00

3 81 .0

12

8 . 00

203 . 2

1 5 . 00

3 81 .0

14

8 . 00

203 . 2

1 6. 00

406. 4

16

8 . 00

203 . 2

1 6. 00

406. 4

18

8 . 00

203 . 2

1 6. 00

406. 4

20

8 . 00

203 . 2

1 8 . 00

45 7. 2

24

8 . 00

203 . 2

1 8 . 00

45 7. 2

30

1 2. 00

3 04. 8

22. 00

558.8

36

1 2. 00

3 04. 8

22. 00

558.8

42

1 2. 00

3 04. 8

24. 00

609. 6

48

1 5 . 00

3 81 .0

26. 00

660. 4

54

1 5 . 00

3 81 .0

28 . 00

71 1 . 2

60

1 5 . 00

3 81 .0

3 0. 00

762. 0

66

1 8 . 00

45 7. 2

3 4. 00

8 63 . 6

72

1 8 . 00

45 7. 2

3 6. 00

91 4. 4

9

Tolerance in. mm

± 0. 06

± 1 .5

± 0. 1 3

± 3.3

MSS

STANDARD PRACTICE

SP-67

TABLE 3

Face-to-Face Dimensions, Single-Flange, and Flangeless Valves Valve Size (NPS )

1

1

2

2 1

2

Face-to-Face of Valve Installed

W-1 Narrow Body in. mm

(a)

(S ee Figures 1 A, 1 B , 1 C)

W-2 Wide Body in. mm

W-3 Extra Wide Body in. mm

1 .31

33.3

1 . 44

3 6. 6

1 .50

3 8.1

1 . 69

42. 9

1 . 75

44. 5

1 .81

46. 0

1 .81

46. 0

1 . 94

49. 3

2. 00

5 0. 8

3

1 .81

46. 0

1 . 94

49. 3

2. 00

5 0. 8

4

2. 06

5 2. 3

2. 1 9

55.6

2. 25

5 7. 2

5

2. 1 9

55:6

2. 5 0

63 . 5

2. 5 6

65 . 0

6

2. 1 9

55.6

2. 75

69. 9

2. 8 1

71 . 4

8

2. 3 8

60. 5

2. 8 1

71 . 4

2. 94

74. 7

10

2. 69

68 . 3

3 . 00

76. 2

3.1 2

79. 2

12

3 . 06

77. 7

3 . 25

8 2. 6

3.38

85.9

14

3 . 06

77. 7

3 . 62

91 . 9

3 . 75

95 . 3

16

3.1 2

79. 2

4. 00

1 01 . 6

4. 1 2

1 04. 6

18

4. 00

1 01 . 6

4. 5 0

1 1 4. 3

4. 62

1 1 7. 3

20

4. 3 8

1 1 1 .3

5 . 00

1 27. 0

5.1 2

1 3 0. 0

24

–

–

6. 06

1 53.9

6. 1 9

1 5 7. 2

30

–

–

6. 5 0

1 65 . 1

–

–

36

–

–

7. 8 8

200. 2

–

–

42

–

–

9. 8 8

25 1 . 0

–

–

48

–

–

1 0. 8 8

276. 4

–

–

2

NOTE:

(a) Face-to-Face of valve installed is defined in S ection 2. 4.

10

Tolerance in. mm ± 0. 06

± 1 .5

± 0. 1 3

± 3.3

± 0. 25

± 6. 4

MSS

STANDARD PRACTICE

SP-67

TABLE 4

End-to-End Dimensions, Grooved-End Valves

Valve Size (NPS)

End-to-End in. mm

Tolerance in. mm

1 1 2 2 2 1 2 3 4 5 6

3.38 3.1 9 3.81 3.81 4.56 5.81 5.81

85.9 81 .0 96.8 96.8 1 1 5.8 1 47.6 1 47.6

± 0.06

± 1 .5

8 10 12 14 16 18 20 24

5.25 6.25 6.50 7.00 7.00 8.00 8.50 1 0.00

1 33.4 1 58.8 1 65.1 1 77.8 1 77.8 203.2 21 5.9 254.0

± 0.1 3

± 3.3

11

MSS

STANDARD PRACTICE

FIGU RE 1 A (S eals Integral to the Valve)

FIGU RE 1 B (Flange Gaskets Integral to the Valve)

FIGU RE 1 C (Flange Gaskets Not Integral to the Valve)

FIGU RE 1

Face-to-Face for Flangeless and Single-Flange Valves (includes Figures 1 A, 1 B , and 1 C)

12

SP-67

MSS

STANDARD PRACTICE

FI G U RE 2

Flanged Ends, Bolting Options

FI G U RE 3

Single Flanged, Bolting Options

FI G U RE 4

Flangeless, Bolting Options 13

SP-67

MSS

STANDARD PRACTICE

FI G U RE 5

End-to-End, Grooved-End Valves

FI G U RE 6

Shouldered-End Valves 14

SP-67

MSS

STANDARD PRACTICE

FI G U RE 7

Disc-to-Pipe Minimum Clearance, Typical Concentric Type Construction

15

SP-67

MSS

STANDARD PRACTICE

SP-67 ANNEX

AN N EX A

Disc-to-Pipe Clearance In ac co rdance with S ectio n 5 . 2 o f this S tandard P rac tic e, b utterfly valves s hall b e des igned to have c learanc e w i th

th e

i ns i de

di ame te rs

o f adj ac e nt

pipe.

G e ne ral l y ,

th i s

c o ns i de rati o n

is

mo s t

i mp o rtant w i th v al v e s hav i ng s i ng l e - flange (lug-type), flangeless-span, or wafer-type bodies where the face-to-face dimension of the valve body is relatively short.

Minimum clearances are shown in Table A1 of this Annex.

The fo llo wi ng e quati o ns i llus trate ho w to c alc ulate the c le aranc e b e twe e n a c o nc e ntri c typ e valve and adj ac e nt p i p e (s

ee Figure 7):

A

=

d - 2c

D

=

√w

A

=

Chord of disc in full open position as determined by intersection of a plane through the

2

+ A

2

Where: installed face of the valve body, in. (mm) c

=

Minimum radial clearance with pipe when perfectly centered with valve (see Table A1 below), in. (mm)

d

=

Inside diameter of connecting pipe (reference Table 1 ), in. (mm)

D

=

Maximum disc diameter, in. (mm)

w

=

Minimum installed face-to-face, in. (mm)

GENERAL NOTES 1.

:

The above calculation assumes concentric location of disc in body.

The design shall provide for the minimum

radial clearance (“c”) for eccentric constructions. 2.

Larger discs may be used for designs that provide for alignment of the pipe with the disc and it can be demonstrated by worst case calculations that the pipe will not interfere with disc rotation.

3.

S ee Figure 7 for typical illustration of concentric-type construction.

TABLE A1

Disc-to-Pipe Minimum Clearances

Valve Size (NPS ) 1

1

2

Minimum Clearance (c) with Valve Perfectly Centered with Pipe 0. 06 in. (1 . 5 mm)

to 6

8 to 20

0. 1 2 in. (3 . 0 mm)

24 to 72

0. 25 in. (6. 4 mm)

 

16

MSS

STANDARD PRACTICE

SP-67 ANNEX

ANNEX B

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

Description

B 1 . 1 -2003 (R2008 )

Unified Inch S crew Threads (UN and UNR Thread Form)

B 1 6. 1 -201 5

Gray Iron Pipe Flanges and Flanged Fittings: Classes 25 , 1 25 , and 25 0

B 1 6. 24-201 6

Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 1 5 0, 3 00, 600, 900, 1 5 00, and 25 00

B 1 6. 3 4-201 3

Valves Flanged – Threaded and Welding End

B 1 6. 42-201 6

Ductile Iron Pipe Flanges and Flanged Fittings: Classes 1 5 0 and 3 00

B 1 6. 47-201 7

Large Diameter S teel Flanges: NPS 26 Through NPS 60 Metric/Inch S tandard

B 1 6. 5 -201 3 *

Pipe Flanges and Flanged Fittings: NPS 1 /2 through NPS 24 Metric/Inch S tandard

B 3 6. 1 0M-201 5

Welded and S eamless Wrought S teel Pipe

B PVC-I-201 5

B oiler and Pressure Vessel Code, S ection I: Rules for Construction of Power B oilers

* The 201 7 edition, specifically, supersedes the current version as a reference herein.

B PVC-VIII-Div. 1 -201 5

B oiler and Pressure Vessel Code, S ection VIII, Division I: Rules for Construction of Pressure Vessels

AWWA; ANSI/AWWA C1 02/A21 . 2-1 95 3 C1 06/A21 . 6-1 98 0

Cast-Iron Pipe, Pit-Cast, for Water or Other Liquids (withdrawn 1 967) Cast-Iron Pipe Centrifugally Cast in Metal Molds for Water or Other Liquids (withdrawn 1 98 2)

C1 1 5 /A21 . 1 5 -1 1

Flanged Ductile-Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges

C1 5 1 /A21 . 5 1 -09

Ductile-Iron Pipe, Centrifugally Cast

C207-1 3

S teel Pipe Flanges for Waterworks S ervice, S izes 4 In. Through 1 44 In. (1 00 mm through 3 , 600 mm)

C5 04-1 5

Rubber-S eated B utterfly Valves

C606-1 5

Grooved and S houldered Joints

MSS; ANSI/MSS S P-25 -201 3

S tandard Marking S ystem for Valves, Fittings, Flanges, and Unions

S P-68 -201 7

High Pressure B utterfly Valves with Offset Design

S P-91 -2009

Guidelines for Manual Operation of Valves

The following organizations appear in the above list: ANS I

American National S tandards Institute 25 West 43

rd

S treet, Fourth Floor

New York, NY 1 003 6-7406 AS ME

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

AWWA

American Water Works Association 6666 W. Quincy Avenue Denver, CO 8 023 5 -3 098

MS S

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

17

MSS

STANDARD PRACTICE

SP-67 ANNEX

This Page Intentionally Left Blank Manufacturers Standardization Society of the Valve and Fittings Industry

18

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 MSS SP-68 High Pressure Butterfly Valves with Offset Design MSS SP-91 Guidelines for Manual Operation of Valves –––––––––––

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

ANSI/MSS SP-58 ANSI/MSS SP-96 ANSI/MSS SP-114 ANSI/MSS SP-134 ANSI/MSS SP-135 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 Terminology for Valves, Fittings, and Their Related Components Corrosion Resistant Pipe Fittings Threaded and Socket Welding Class 150 and 1000 Valves for Cryogenic Service, including Requirements for Body/Bonnet Extensions High Pressure Knife Gate Valves Quality Standard Practice for Oxygen Cleaning of Valves and Fittings Pressure Seal Bonnet Valves –––––––––––

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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

MSS is an American National Standards Institute (ANSI)-accredited standards developer.

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:

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Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE, Vienna, VA 22180-4620 • Phone (703) 281-6613 • Fax (703) 281-6671 “The Technical Voice ofthe Industry” IHS- MS S SP-67-201 7