ISO 14313:1999

Petroleum and natural gas industries - Pipeline transportation systems - Pipeline valves

Industries du pétrole et du gaz naturel — Systèmes de transport par conduites — Robinets de conduites

General Information

• Status: Withdrawn
• Publication Date: 20-Oct-1999
• Withdrawal Date: 20-Oct-1999
• ICS: 75.200 - Petroleum products and natural gas handling equipment
• Technical Committee: ISO/TC 67/SC 2 - Pipeline transportation systems
• Drafting Committee: ISO/TC 67/SC 2 - Pipeline transportation systems
• Current Stage: 9599 - Withdrawal of International Standard
• Start Date: 04-Dec-2007
• Completion Date: 13-Dec-2025

Relations

• Revised: ISO 14313:2007 - Petroleum and natural gas industries - Pipeline transportation systems - Pipeline valves
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 14313
First edition
1999-10-01
Petroleum and natural gas industries —
Pipeline transportation systems —
Pipeline valves
Industries du pétrole et du gaz naturel — Systèmes de transport
par conduites — Robinets de conduites
A
Reference number
Contents
Foreword. v
Introduction . vi
1 Scope .1
2 Normative references .1
3 Terms and definitions .3
4 Symbols and abbreviations .6
4.1 Symbols.6
4.2 Abbreviations.6
5 Valve types and configurations.7
5.1 Valve types .7
5.2 Valve configurations.7
6 Design.19
6.1 Pressure and temperature rating .19
6.2 Sizes.20
6.3 Face-to-face and end-to-end dimensions .20
6.4 Minimum-bore full-opening valves .33
6.5 Valve operation .33
6.6 Pigging.33
6.7 Valve ends .34
6.8 Pressure relief .34
6.9 Bypass, drain and vent connections .34
6.10 Handwheels and wrenches (levers) .35
6.11 Locking devices.35
©  ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
Printed in Switzerland
ii
©
ISO
6.12 Position indicators . 35
6.13 Operators and stem extensions. 36
6.14 Sealant injection . 36
6.15 Lifting lugs . 36
6.16 Actuators . 36
6.17 Drive trains . 36
6.18 Stem retention. 37
6.19 Fire safety. 37
6.20 Anti-static device. 37
6.21 Design documents. 37
6.22 Design document review . 37
7 Materials . 37
7.1 Material specification . 37
7.2 Service compatibility. 37
7.3 Forged parts. 38
7.4 Welding ends . 38
7.5 Toughness test requirements . 38
7.6 Bolting . 39
7.7 Sour service . 39
8 Welding. 39
8.1 Qualifications. 39
8.2 Impact testing . 39
8.3 Hardness testing. 40
9 Quality control . 41
9.1 General . 41
9.2 Measuring and test equipment. 42
9.3 Qualification of inspection and test personnel . 42
9.4 NDE of repair welding . 42
10 Pressure testing. 43
10.1 General . 43
iii
©
ISO
10.2 Stem backseat test .43
10.3 Hydrostatic shell test.44
10.4 Hydrostatic seat test.44
10.5 Draining .46
11 Marking .46
11.1 Requirements.46
11.2 Marking example.49
12 Storage and shipping .50
12.1 Painting.50
12.2 Corrosion prevention .50
12.3 Openings .50
13 Documentation.50
Annex A (informative) Purchasing guidelines.51
Annex B (normative) Supplementary NDE requirements.53
(normative)
Annex C Supplementary test requirements.56
Annex D (normative) Supplementary documentation requirements .59
Bibliography.60
iv
©
ISO
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
This International Standard was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore
structures for petroleum and natural gas industries, Subcommittee SC 2, Pipeline transportation systems.
Annexes B, C and D form a normative part of this International Standard. Annex A is for information only.
v
©
ISO
Introduction
This International Standard is based on API Specification 6D, twenty-first edition, March 1994.
Users of this International Standard should be aware that further or differing requirements may be needed for
individual applications. This International Standard is not intended to inhibit a vendor from offering, or the purchaser
from accepting, alternative equipment or engineering solutions for the individual application. This may be particularly
applicable where there is innovative or developing technology. Where an alternative is offered, the vendor should
identify any variations from this International Standard and provide details.
vi
INTERNATIONAL STANDARD  © ISO 14313:1999(E)
ISO
Petroleum and natural gas industries —
Pipeline transportation systems — Pipeline valves
1 Scope
This International Standard specifies requirements and gives recommendations for the design, manufacturing,
testing and documentation of ball, check, gate and plug valves for application in pipeline systems meeting the
requirements of ISO 13623 for the petroleum and natural gas industries.
Valves for pressure ratings exceeding PN 420 (Class 2500) are not covered by this International Standard.
Annex A of this International Standard provides guidelines to assist the purchaser with valve type selection and
specification of specific requirements when ordering valves.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
NOTE Non-International Standards may be replaced, by agreement, with other recognized and equivalent national or
industry standards.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and
designation.
ISO 148, Steel — Charpy impact test (V-notch).
ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances
and designation.
ISO 228-2, Pipe threads where pressure-tight joints are not made on the threads — Part 2: Verification by means of
limit gauges.
ISO 5208, Industrial valves — Pressure testing of valves.
ISO 7005-1, Metallic flanges — Part 1: Steel flanges.
ISO 10474, Steel and steel products — Inspection documents.
ISO 10497, Testing of valves — Fire type-testing requirements.
ISO 13623, Petroleum and natural gas industries — Pipeline transportation systems.
ASME B1.1, Unified inch screw threads (UN and UNR thread form).
©
ISO
ASME B1.20.1, Pipe threads, General purpose (inch).
ASME B16.5,
Pipe flanges and flanged fittings — NPS 1/2 through NPS 24.
ASME B16.10, Face-to-face and end-to-end dimensions of valves.
ASME B16.25:1997, Buttwelding ends.
ASME B16.34:1996, Valves — Flanged, threaded, and welding end.
ASME B16.47, Larger diameter steel flanges — NPS 26 through NPS 60.
ASME B31.4:1992, Liquid transportation systems for hydrocarbons, liquid petroleum gas, anhydrous ammonia, and
alcohols.
ASME B31.8:1995, Gas transmission and distribution piping systems.
ASME Boiler and Pressure Vessel Code:1998, Section V, Non destructive examination.
ASME Boiler and Pressure Vessel Code:1998, Section VIII, Division 1, Rules for construction of pressure vessels.
ASME Boiler and Pressure Vessel Code:1998, Section VIII, Division 2, Alternative rules for construction of pressure
vessels.
ASME Boiler and Pressure Vessel Code, Section IX, Qualification standard for welding and brazing procedures,
welders, brazers, and welding and brazing operators.
th
(American Society of Mechanical Engineers, 345 East 47 Street, NY 10017-2392, USA)
ASNT SNT-TC-1A, Recommended Practice No. SNT-TC-1A.
(American Society of Non-Destructive Testing, P.O. Box 28518, 1711 Arlingate Lane, Columbus, OH 43228-0518, USA)
ASTM A 193/A 193M, Standard specification for alloy-steel and stainless steel bolting materials for high-
temperature service.
ASTM A 320/A 320M, Standard specification for alloy steel bolting materials for low-temperature service.
ASTM A 370, Standard test methods and definitions for mechanical testing of steel products.
ASTM A 388/A 388M, Standard practice for ultrasonic examination of heavy steel forgings.
ASTM A 435/A 435M, Standard specification for straight-beam ultrasonic examination of steel plates.
ASTM A 577/A 577M, Standard specification for ultrasonic angle-beam examination of steel plates.
ASTM A 609/A 609M:1997, Standard practice for castings, carbon, low-alloy, and martensitic stainless steel,
ultrasonic examination thereof.
(American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, USA)
AWS QC1, Standard for AWS certification of welding inspectors.
(The American Welding Society, 550 NW LeJeune Road, Miami, FL 33126, USA)
EN 287-1, Approval testing of welders — Fusion welding — Part 1: Steels.
EN 288-3, Specification and approval of welding procedures for metallic materials — Part 3: Welding procedure
tests for the arc welding of steels.
©
ISO
EN 473:1993, Qualification and certification of NDT personnel — General principles.
(CEN, European Committee for Standardization, Central Secretariat, Rue de Stassart 36, B-1050, Brussels, Belgium)
MSS SP-44, Steel pipeline flanges.
(Manufacturers Standardization Society of the Valve & Fittings Industry Inc., 127 Park Street N.E., Vienna, Virginia 22180, USA)
NACE MR 0175, Sulfide stress cracking resistant metallic materials for oilfield equipment.
NACE TM 0177, Laboratory testing of metals for resistance to specific forms of environmental cracking in H S
environments.
NACE TM 0284, Evaluation of pipeline and pressure vessel steels for resistance to hydrogen-induced cracking.
(National Association of Corrosion Engineers, P.O. Box 218340, Houston, Texas 77218, USA)
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply:
3.1
ANSI rating class
numerical pressure design class defined in ASME B16.5 and used for reference purposes
NOTE The ANSI rating class is designated by the word "Class" followed by a number.
3.2
bi-directional valve
valve designed for blocking the fluid in both downstream and upstream directions
3.3
bleed
drain or vent
3.4
block valve
gate, plug or ball valve that blocks flow into the downstream conduit when in the closed position
NOTE Valves are either single- or double-seated, bi-directional or uni-directional.
3.5
breakaway thrust
breakaway torque
thrust or torque required for opening a valve with maximum pressure differential
3.6
by agreement
agreed between manufacturer and purchaser
3.7
double-block-and-bleed (DBB) valve
valve with two seating surfaces which, in the closed position, blocks flow from both valve ends when the cavity
between the seating surfaces is vented through a bleed connection provided on the body cavity
3.8
drive train
all parts of a valve drive between the operator and the obturator, including the obturator but excluding the operator
©
ISO
3.9
flow coefficient
K
v
volumetric flow rate, in cubic metres per hour, of water at a temperature between 5 °C (40 °F) and 40 °C (104 °F)
passing through a valve and resulting in a pressure loss of 1 bar (14,7 psi)
NOTE  K relates to the flow coefficient C in US gallons per minute at 15,6 °C (60 °F) resulting in a 1 psi pressure drop as
v v
follows:
C
v
K =
v
1,156
3.10
full-opening valve
valve with an unobstructed opening capable of allowing a sphere or other internal device for the same nominal size
as the valve to pass
3.11
handwheel
wheel consisting of a rim connected to a hub, for example by spokes, and used to operate manually a valve
requiring multiple turns
3.12
locking device
part or an arrangement of parts for securing a valve in the open and/or closed position
3.13
manual actuator
manual operator
wrench (lever) or handwheel with or without a gearbox
3.14
maximum pressure differential (MPD)
maximum difference between the upstream and downstream pressure across the obturator at which the obturator
may be operated
3.15
nominal pipe size (NPS)
numerical inches designation of size which is common to components in piping systems of any one size
NOTE The nominal pipe size is designated by the letters NPS followed by a number.
3.16
nominal pressure (PN) class
numerical pressure design class as defined in ISO 7005-1 and used for reference purposes
NOTE The nominal pressure (PN) class is designated by the abbreviation PN followed by a number.
3.17
nominal size (DN)
numerical metric designation of size which is common to components in piping systems of any one size
NOTE Nominal size is designated by the letters DN followed by a number.
3.18
obturator
closure member
part of a valve, such as a ball, clapper, disc, gate or plug, which is positioned in the flow stream to permit or block flow
3.19
operator
device (or assembly) for opening or closing a valve
©
ISO
3.20
position indicator
device to show the position of the valve obturator
3.21
powered actuator
powered operator
electric, hydraulic or pneumatic device bolted or otherwise attached to the valve for powered opening and closing of
the valve
3.22
pressure class
numerical pressure design class expressed in accordance with either the nominal pressure (PN) class or the ANSI
rating class
NOTE In this International Standard, the pressure class is stated by the PN class followed by the ANSI rating class between
brackets.
3.23
pressure-containing parts
parts, such as bodies, bonnets, glands, stems, gaskets and bolting, designed to contain the pipeline fluid
3.24
pressure-controlling parts
parts, such as seat and obturator, intended to block or permit the flow of fluids
3.25
process-wetted parts
parts exposed directly to the pipeline fluid
3.26
reduced-opening valve
valve with the opening through the obturator smaller than at the end connection(s)
3.27
seating surfaces
contact surfaces of the obturator and seat which ensure valve sealing
3.28
stem
part that connects the obturator to the operator and which may consist of one or more components
3.29
stem extension assembly
assembly consisting of the stem extension and the stem extension housing
3.30
support ribs or legs
metal structure which provides a stable footing when the valve is set on a fixed base
3.31
through-conduit valve
valve with an unobstructed and continuous cylindrical opening
3.32
twin-seat, both seats bi-directional, valve
valve with two seats, each sealing in both directions
©
ISO
3.33
twin-seat, one seat uni-directional and one seat bi-directional, valve
valve with two seats, one sealing in one direction and the other in either direction
3.34
uni-directional valve
valve designed for blocking the flow in one direction only
3.35
venturi plug valve
valve with a substantially reduced opening through the plug and a smooth transition from each full-opening end to
the reduced opening
4 Symbols and abbreviations
4.1 Symbols
C Flow coefficient in imperial units
v
K Flow coefficient in metric units
v
4.2 Abbreviations
BM Base metal
CE Carbon equivalent
DBB Double-block-and-bleed
DN Nominal size
HAZ Heat-affected zone
HR Rockwell hardness
HV Vickers hardness
MPD Maximum pressure differential
MT Magnetic-particle testing
NDE Non-destructive examination
NPS Nominal pipe size
PN Nominal pressure
PQR Procedure qualification record
PT Penetrant testing
PWHT Post-weld heat treatment
SMYS Specified minimum yield strength
WM Weld metal
WPS Weld procedure specification
WQR Welder qualification record
©
ISO
5 Valve types and configurations
5.1 Valve types
5.1.1 Gate valves
Typical configurations for gate valves with flanged and welding ends are shown, for illustration purposes only, in
Figures 1 and 2.
Gate valves shall have an obturator which moves in a plane perpendicular to the direction of flow. The gate can be
constructed of one piece for slab-gate valves or of two or more pieces for expanding-gate valves.
Gate valves shall be provided with a back seat or secondary stem sealing feature in addition to the primary stem
seal.
5.1.2 Lubricated and non-lubricated plug valves
Typical configurations for plug valves with flanged and welding ends are shown, for illustration purposes only, in
Figure 3.
Plug valves shall have a cylindrical or conical obturator which rotates about an axis perpendicular to the direction of
flow.
5.1.3 Ball valves
Typical configurations for ball valves with flanged or welding ends are shown, for illustration purposes only, in
Figures 4, 5 and 6.
Ball valves shall have a spherical obturator which rotates on an axis perpendicular to the direction of flow.
5.1.4 Check valves
Typical configurations for check valves are shown, for illustration purposes only, in Figures 7 to 11. Check valves
may also be of the wafer type.
Check valves shall have an obturator which responds automatically to block fluid in one direction.
5.2 Valve configurations
5.2.1 Full-opening valves
Full-opening valves shall be unobstructed in the fully opened position and have an internal bore as specified in
Table 1. There is no restriction on the upper limit of valve bore sizes.
Full-opening through-conduit valves shall have a circular bore in the obturator that will allow a sphere with a nominal
size not less than that specified in Table 1 to pass.
Welding-end valves may require a smaller bore at the welding end to mate with the pipe.
5.2.2 Reduced-opening valves
The internal bore of reduced-opening valves shall be less than the internal bore specified in Table 1.
©
ISO
Table 1 — Minimum bore for full-opening valves (mm)
Pressure class
DN NPS
(mm) (inches)
PN 20 to 100 PN 150 PN 250 PN 420
(Class 150 to 600) (Class 900) (Class 1500) (Class 2500)
15 ½ 13 13 13 13
20 ¾ 19 19 19 19
25 1 25 25 25 25
32 1¼ 32 32 32 32
40 1½ 38 38 38 38
50 2 49 49 49 42
65 2½ 62 62 62 52
80 3 74 74 74 62
100 4 100 100 100 87
150 6 150 150 144 131
200 8 201 201 192 179
250 10 252 252 239 223
300 12 303 303 287 265
350 14 334 322 315 —
400 16 385 373 360 —
450 18 436 423 — —
500 20 487 471 — —
550 22 538 522 — —
600 24 589 570 — —
650 26 633 617 — —
700 28 684 665 — —
750 30 735 712 — —
800 32 779 760 — —
850 34 830 808 — —
900 36 874 855 — —
950 38 925 — — —
1 000 40 976 — — —
1 050 42 1 020 — — —
1 200 48 1 166 — — —
1 350 54 1 312 — — —
1 400 56 1 360 — — —
1 500 60 1 458 — — —
©
ISO
Key
1 Stem indicator
2 Stem enclosure
3 Handwheel
4 Yoke nut
5 Yoke
6 Stem
7 Yoke bolting
8 Stem packing
9 Relief valve
10 Bonnet
11 Bonnet bolting
12 Gate guide
13 Gate assembly
14 Seat ring
15 Body
16 Support ribs or legs
17 Raised face
18 Welding end
19 Ring joint
A Raised-face face-to-face
dimension
B Welding-end end-to-end
dimension
C Ring-joint end-to-end
dimension
Figure 1 — Expanding-gate/rising-stem gate valve
©
ISO
Key
1 Stem indicator
2 Stem enclosure
3 Handwheel
4 Yoke nut
5 Yoke
6 Stem
7 Yoke bolting
8 Stem packing
9 Relief valve
10 Bonnet
11 Bonnet bolting
12 Gate
13 Seat ring
14 Body
15 Support ribs or legs
16 Raised face
17 Welding end
18 Ring joint
A Raised-face face-to-face
dimension
B Welding-end end-to-end
dimension
C Ring-joint end-to-end
dimension
Figure 2 — Slab-gate/through-conduit rising-stem gate valve
©
ISO
Key
1 Lubricator screw
2 Gland studs and nuts
3 Gland
4 Cover studs and nuts
5 Cover
6 Cover gasket
7 Stem packing
8 Lubricant check valve
9 Plug
10 Body
11 Stop collar
12 Raised face
13 Welding end
14 Ring joint
A Raised-face face-to-face
dimension
B Welding-end end-to-end
dimension
C Ring-joint end-to-end
dimension
Figure 3 — Plug valve
©
ISO
Key
1 Stem seal
2 Bonnet cover
3 Bonnet
4 Body bolting
5 Body
6 Seat ring
7 Stem
8 Ball
9 Raised face
10 Welding end
11 Ring joint
A Raised-face face-to-face
dimension
B Welding-end end-to-end
dimension
C Ring-joint end-to-end
dimension
Figure 4 — Top-entry ball valve
©
ISO
Key
1 Stem
2 Body cover
3 Stem seal
4 Body
5 Seat ring
6 Ball
7 Body bolting
8 Closure
9 Raised face
10 Welding end
11 Ring joint
A Raised-face face-to-face
dimension
B Welding-end end-to-end
dimension
C Ring-joint end-to-end
dimension
Figure 5 — Three-piece ball valve
©
ISO
Key
1 Stem
2 Body cover
3 Stem seal
4 Body
5 Seat ring
6Ball
7 Closure
8 Raised face
9 Welding end
10 Ring joint
A Raised-face face-to-face
dimension
B Welding-end end-to-end
dimension
C Ring-joint end-to-end
dimension
Figure 6 — Welded-body ball valve
©
ISO
Key
1 Cover bolting
2 Cover
3 Body
4 Clapper disc arm
5 Shaft
6 Clapper disc
7 Seat ring
8 Support ribs or legs
9 Raised face
10 Welding end
11 Ring joint
12 Direction of flow
A Raised-face face-to-face
dimension
B Welding-end end-to-end
dimension
C Ring-joint end-to-end
dimension
Figure 7 — Reduced-opening swing check valve
©
ISO
Key
1 Cover bolting
2 Cover
3 Body
4 Clapper disc arm
5 Shaft
6 Seat ring
7 Clapper disc
8 Support ribs or legs
9 Raised face
10 Welding end
11 Ring joint
12 Direction of flow
A Raised-face face-to-face
dimension
B Welding-end end-to-end
dimension
C Ring-joint end-to-end
dimension
Figure 8 — Full-opening swing check valve
©
ISO
Key
1 Body
2 Hinge
3 Nut
4 Closure plate/stud assembly
5 Seat ring
6 Bearing spacers
7 Hinge pin
8 Hinge pin retainers
9 Direction of flow
Figure 9 — Single-plate wafer-type check valve, long pattern
©
ISO
Key
1 Body
2 Closure plate
3 Stop pin
4 Spring
5 Hinge pin
6 Plate lug bearings
7 Body lug bearings
8 Stop pin retainers
9 Hinge pin retainers
10 Spring bearings
11 Direction of flow
Figure 10 — Typical dual-plate wafer-type check valve, long pattern
©
ISO
Key
1 Body
5 Body seal
2 Clapper
6 Lifting eye
3Pin
7 Direction of flow
4 Clapper seal
Figure 11 — Single-plate wafer-type check valve, short pattern
6 Design
6.1 Pressure and temperature rating
The nominal pressure (PN) class or the ANSI rating class shall be used for the specification of the required
pressure class.
Valves covered by this International Standard should be furnished in one of the following classes:
PN 20 (Class 150) PN 150 (Class 900)
PN 50 (Class 300) PN 250 (Class 1500)
PN 64 (Class 400) PN 420 (Class 2500)
PN 100 (Class 600)
Pressure classes shall be specified by the purchaser in accordance with the applicable rating tables for material
groups in ASME B16.34.
The purchaser may specify intermediate design pressures and temperatures for his specific application.
Allowable operating pressures and temperatures for valves made of materials not covered by ASME B16.34 shall
be determined by calculations in accordance with an agreed pressure vessel design standard, such as ASME
Section VIII, Division 1 and Division 2, or BS 5500.
Non-metallic parts may limit minimum and maximum operating pressures and temperatures.
The maximum operating pressure at the minimum and maximum operating temperatures shall be marked on the
nameplate.
©
ISO
6.2 Sizes
All valves, except for reduced-opening valves, shall be furnished in the nominal sizes (DN) listed in Tables 2 to 6.
Reduced-opening valves shall be furnished in the nominal sizes in accordance with Table 1.
NOTE In this International Standard, DN sizes are stated first followed by the equivalent NPS size between brackets.
Except for reduced-opening valves, valve sizes shall be specified by the nominal sizes (DN) or nominal pipe size

(NPS).
Reduced-opening valves with a circular opening through the obturator shall be specified by the nominal size of the
end connections and the nominal size of the minimum bore of the obturator in accordance with Table 1, except that
for valve sizes DN 50 (NPS 2) or smaller the actual bore of the obturator shall be specified. For example, a DN 400
valve with a reduced 334-mm-diameter circular opening through the obturator shall be specified as 400 ´ 350.
Reduced-opening valves with a non-circular opening through the obturator and reduced-opening check valves shall
be designated as reduced-bore valves and specified by the nominal size corresponding to the end connections
followed by the letter "R". For example, a reduced-bore valve with DN 400 end connections and a 381 ´ 305 mm
rectangular opening through the obturator shall be specified as 400R.
6.3 Face-to-face and end-to-end dimensions
Unless otherwise agreed, face-to-face and end-to-end dimensions of valves shall be in accordance with Tables
2 to 6.
Face-to-face and end-to-end dimensions for valve sizes not specified in Tables 2 to 6 shall be in accordance with
ASME B16.10. Face-to-face and end-to-end dimensions not shown in Tables 2 to 6 or in ASME B16.10 shall be
established by agreement.
The length of valves having one welding end and one flanged end shall be determined by adding half the length of a
flanged-end valve to half the length of a welding-end valve.
Tolerances on the face-to-face and end-to-end dimensions shall be – 2 mm for valve sizes DN 250 and smaller, and
– 3 mm for valve sizes DN 300 and larger.
The nominal size and face-to-face or end-to-end dimensions shall be stated on the nameplate if not specified in or
not in accordance with Tables 2 to 6.
©
ISO
Table 2 — Gate valves — Face-to-face (A) and end-to-end (B and C)
dimensions (mm)
Raised Welding Ring Raised Welding Ring
DN NPS
face end joint face end joint
(mm) (inches)
A B C A B C
PN 20 (Class 150) PN 50 (Class 300)
50 2 178 216 191 216 216 232
65 2½ 191 241 203 241 241 257
80 3 203 283 216 283 283 298
4 229 305
100 305 241 305 321
150 6 267 403 279 403 403 419
200 8 292 419 305 419 419 435
250 10 330 457 343 457 457 473
300 12 356 502 368 502 502 518
350 14 381 572 394 762 762 778
400 16 406 610 419 838 838 854
450 18 432 660 445 914 914 930
500 20 457 711 470 991 991 1 010
550 22 — — — 1 092 1 092 1 114
600 24 508 813 521 1 143 1 143 1 165
650 26 559 864 — 1 245 1 245 1 270
700 28 610 914 — 1 346 1 346 1 372
a
750 30 914 — 1 397 1 397 1 422
800 32 711 965 — 1 524 1 524 1 553
850 34 762 1 016 — 1 626 1 626 1 654
b
900 36 711 1 016 — 1 727 1 727 1 756
PN 64 (Class 400) PN 100 (Class 600)
50 2 292 292 295 292 292 295
65 2½ 330 330 333 330 330 333
80 3 356 356 359 356 356 359
100 4 406 406 410 432 432 435
150 6 495 495 498 559 559 562
200 8 597 597 600 660 660 664
250 10 673 673 676 787 787 791
300 12 762 762 765 838 838 841
14 826
350 826 829 889 889 892
400 16 902 902 905 991 991 994
450 18 978 978 981 1 092 1 092 1 095
500 20 1 054 1 054 1 060 1 194 1 194 1 200
550 22 1 143 1 143 1 153 1 295 1 295 1 305
600 24 1 232 1 232 1 241 1 397 1 397 1 407
650 26 1 308 1 308 1 321 1 448 1 448 1 461

700 28 1 397 1 397 1 410 1 549 1 549 1 562
750 30 1 524 1 524 1 537 1 651 1 651 1 664
800 32 1 651 1 651 1 667 1 778 1 778 1 794
850 34 1 778 1 778 1 794 1 930 1 930 1 946
900 36 1 880 1 880 1 895 2 083 2 083 2 099
©
ISO
Table 2 (concluded)
Raised Welding Ring Raised Welding Ring
DN NPS
face end joint face end joint
(mm) (inches)
A B C A B C
PN 150 (Class 900) PN 250 (Class 1500)
50 2 368 368 371 368 368 371
65 2½ 419 419 422 419 419 422
80 3 381 381 384 470 470 473
100 4 457 457 460 546 546 549
150 6 610 610 613 705 705 711
200 8 737 737 740 832 832 841
250 10 838 838 841 991 991 1 000
300 12 965 965 968 1 130 1 130 1 146
350 14 1 029 1 029 1 038 1 257 1 257 1 276
400 16 1 130 1 130 1 140 1 384 1 384 1 407
450 18 1 219 1 219 1 232 1 537 1 537 1 559
500 20 1 321 1 321 1 334 1 664 1 664 1 686
550 22 — — — — — —
600 24 1 549 1 549 1 568 1 943 1 943 1 972
PN 420 (Class 2500)
50 2 451 451 454
65 2½ 508 508 514
80 3 578 578 584
100 4 673 673 683
150 6 914 914 927
200 8 1 022 1 022 1 038
250 10 1 270 1 270 1 292
300 12 1 422 1 422 1 445
a
Through-conduit valves shall be 650 mm.
b
Through-conduit valves shall be 800 mm.
©
ISO
Table 3 — Plug valves — Face-to-face (A) and end-to-end (B and C) dimensions (mm)
Short-pattern Reduced Venturi Round-port, full-bore
Raised Welding Ring Raised Welding Ring Raised Welding Ring Raised Welding Ring
DN NPS
face end joint face end joint face end joint face End joint
(mm) (inches)
A B C A B C A B C A B C
PN 20 (Class 150)
50 2 178 267 191 — — — — 267 — 279
— —
65 2½ 191 305 203 — — — — — — 298 — 311
80 203 330 216 — — — — — — 343 — 356
100 229 356 241 — — — — — — 432 — 445
150 267 457 279 394 — 406 — — — 546 — 559
200 292 521 305 457 — 470 — — — 622 — 635
250 330 559 343 533 — 546 533 559 546 660 — 673
300 356 635 368 610 — 622 610 635 622 762 — 775
350 — — — — — — 686 686 699 — — —
400 — — — — — — 762 762 775 — — —
450 — — — — — — 864 864 876 — — —
500 — — — — — — 914 914 927 — — —
600 — — — — — — 1 067 1 067 1 080 — — —
PN 50 (Class 300)
50 2 216 267 232 — — — — — — 283 283 298
65 2½ 241 305 257 — — — — — — 330 330 346
80 283 330 298 — — — — — — 387 387 403
100 305 356 321 — — — — — — 457 457 473
150 403 457 419 403 — 419 403 457 419 559 559 575
200 419 521 435 502 — 518 419 521 435 686 686 702
250 10 457 559 473 568 — 584 457 559 473 826 826 841
300 502 635 518 — — — 502 635 518 965 965 981
350 — — — — — — 762 762 778 — — —
400 — — — — — — 838 838 854 — — —
450 — — — 914 — 930 914 914 930 — — —
500 — — — 991 — 1 010 991 991 1 010 — — —
550 — — — 092 — 1 114 1 092 1 092 1 114 — — —
22 1
600 — — — 1 143 — 1 165 1 143 1 143 1 165 — — —
650 — — — 1 245 — 1 270 1 245 1 245 1 270 — — —
700 — — — 1 346 — 1 372 1 346 1 346 1 372 — — —
750 — — — 1 397 — 1 422 1 397 1 397 1 422 — — —
800 — — — 1 524 — 1 553 1 524 1 524 1 553 — — —
850 — — — 1 626 — 1 654 1 626 1 626 1 654 — — —
900 — — — 1 727 — 1 756 1 727 1 727 1 756 — — —
©
ISO
Table 3 (continued)
Short-pattern Reduced Venturi Round-port, full-bore
Raised Welding Ring Raised Welding Ring Raised Welding Ring Raised Welding Ring
DN NPS
face end joint face end joint face end joint face End joint
(mm) (inches)
A B C A B C A B C A B C
PN 64 (Class 400)
50 2 — — — 292 292 295 — — — 330 — 333
65 2½ — — — 330 330 333 — — — 381 — 384
80 — — — 356 356 359 — — — 445 — 448
100 — — — 406 406 410 — — — 483 559 486
150 — — — 495 495 498 495 495 498 610 711 613
200 — — — 597 597 600 597 597 600 737 845 740
250 — — — 673 673 676 673 673 676 889 889 892
300 12 — — — 762 762 765 762 762 765 1 016 1 016 1 019
350 — — — — — — 826 826 829 — — —
400 — — — — — — 902 902 905 — — —
450 — — — — — — 978 978 981 — — —
500 — — — — — — 1 054 1 054 1 060 — — —
550 — — — — — — 1 143 1 143 1 153 — — —
600 — — — — 1 232 1 232 1 241 — — —
24 — —
650 — — — — — — 1 308 1 308 1 321 — — —
700 — — — — — — 1 397 1 397 1 410 — — —
750 — — — — — — 1 524 1 524 1 537 — — —
800 — — — — — — 1 651 1 651 1 667 — — —
850 — — — — — — 1 778 1 778 1 794 — — —
900 — — — — — — 1 880 1 880 1 895 — — —
©
ISO
Table 3 (continued)
Reduced Venturi Round-port, full-bore
Raised Welding Ring Raised Welding Ring Raised Welding Ring
DN NPS
face end joint face end joint face End joint
(mm) (inches)
A B C A B C A B C
PN 100 (Class 600)
50 2 292 292 295 — — — 330 — 333
65 2½ 330 330 333 — — — 381 — 384
80 3 356 356 359 — — — 445 — 448
100 4 432 432 435 — — — 508 559 511
150 6 559 559 562 559 559 562 660 711 664
200 8 660 660 664 660 660 664 794 845 797
250 10 787 787 791 787 787 791 940 1 016 943
300 12 — — — 838 838 841 1 067 1 067 1 070
350 14 — — — 889 889 892 — — —
400 16 — — — 991 991 994 — — —
450 18 — — — 1 092 1 092 1 095 — — —
500 20 — — — 1 194 1 194 1 200 — — —
550 22 — — — 1 295 1 295 1 305 — — —
600 24 — — — 1 397 1 397 1 407 — — —
650 26 — — — 1 448 1 448 1 461 — — —
750 30 — — — 1 651 1 651 1 664 — — —
800 32 — — — 1 778 1 778 1 794 — — —

850 34 — — — 1 930 1 930 1 946 — — —
900 36 — — — 2 083 2 083 2 099 — — —
PN 150 (Class 900)
50 2 368 — 371 — — — 381 — 384
65 2½ 419 — 422 — — — 432 — 435
80 3 381 381 384 — — — 470 — 473
100 4 457 457 460 — — — 559 — 562
150 6 610 610 613 610 610 613 737 — 740
200 8 737 737 740 737 737 740 813 — 816
250 10 838 838 841 838 838 841 965 — 968
300 12 — — — 965 965 968 1 118 — 1 121
400 16 — — — 1 130 1 130 1 140 — — —
PN 250 (Class 1500)
50 2 368 — 371 — — — 391 — 394
65 2½ 419 — 422 — — — 454 — 457
80 3 470 470 473 — — — 524 — 527
100 4 546 546 549 — — — 625 — 629
150 6 705 705 711 705 705 711 787 — 794
200 8 832 832 841 832 832 841 889 — 899
250 10 991 991 1 000 991 991 1 000 1 067 — 1 076
300 12 1 130 1 130 1 146 1 130 1 130 1 146 1 219 — 1 235
©
ISO
Table 3 (concluded)
Reduced Venturi Round-port, full-bore
Raised Welding Ring Raised Welding Ring Raised Welding Ring
DN NPS
face end joint face end joint face End joint
(mm) (inches)
A B C A B C A B C
PN 420 (Class 2500)
50 2 451 — 454 — — — — — —
65 2½ 508 — 514 — — — — — —
80 3 578 — 584 — — — — — —
100 4 673 — 683 — — — — — —
...