ISO 10423:2001
(Main)Petroleum and natural gas industries — Drilling and production equipment — Wellhead and christmas tree equipment
Petroleum and natural gas industries — Drilling and production equipment — Wellhead and christmas tree equipment
Industries du pétrole et du gaz naturel — Équipement de forage et de production — Équipement pour têtes de puits et arbre de Noël
General Information
Relations
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 10423
Second edition
2001-08-01
Petroleum and natural gas industries —
Drilling and production equipment —
Wellhead and christmas tree equipment
Industries du pétrole et du gaz naturel — Équipement de forage et de
production — Équipement pour têtes de puits et arbre de Noël
Reference number
ISO 10423:2001(E)
©
ISO 2001
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ISO 10423:2001(E)
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ii © ISO 2001 – All rights reserved
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ISO 10423:2001(E)
Contents Page
Foreword.vi
Introduction.vii
1 Scope .1
1.1 Purpose.1
1.2 Applicability.1
1.3 Service conditions.2
1.4 Product specification levels (PSL).3
2 Normative references .6
3 Terms, definitions and abbreviated terms .8
3.1 Terms and definitions .8
3.2 Abbreviated terms .20
4 Design and performance — General requirements.21
4.1 Performance requirements — General.21
4.2 Service conditions.21
4.3 Design methods.23
4.4 Miscellaneous design information.27
4.5 Design documentation .28
4.6 Design review.28
4.7 Design verification.28
5 Materials — General requirements .28
5.1 General.28
5.2 Written specifications .28
5.3 Mandrel tubing and casing hangers .29
5.4 Bodies, bonnets, end and outlet connections.32
5.5 Ring gaskets.39
5.6 Test coupons (TC) .40
5.7 Qualification test coupons (QTC) .43
5.8 Heat-treating equipment qualification .46
5.9 Material qualification .46
5.10 Bullplugs and valve-removal plugs .46
5.11 Back-pressure valves.46
5.12 Pressure-boundary penetrations .46
5.13 Wear bushings .46
5.14 Hub-end connectors.46
6 Welding — General requirements.47
6.1 General.47
6.2 Non-pressure-containing weldments other than weld overlays (PSL 1 to PSL 3).47
6.3 Pressure-containing fabrication weldments for bodies, bonnets, end and outlet connections,
bullplugs, valve-removal plugs and back-pressure valves.47
6.4 Pressure-containing repair weldments for bodies, bonnets, end and outlet connections,
bullplugs, valve-removal plugs and back-pressure valves.52
6.5 Weld overlay for corrosion resistance and/or hard facing and other material surface property
controls.54
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ISO 10423:2001(E)
7 Quality control.57
7.1 General.57
7.2 Measuring and testing equipment .57
7.3 QuaIity control personnel qualifications.58
7.4 Quality control requirements.58
7.5 Quality control records requirements .95
8 Equipment marking .100
8.1 Marking requirements .100
8.2 Wellhead equipment.102
8.3 Connectors and fittings.102
8.4 Casing and tubing hangers.102
8.5 Valves and chokes.103
8.6 Loose connectors [flanged, threaded, other end connectors (OEC) and welded] .104
8.7 Other equipment .104
8.8 Studs and nuts .105
8.9 Christmas trees.105
8.10 Valve-removal plugs.105
8.11 Bullplugs.105
8.12 Back-pressure valves.106
9 Storing and shipping.106
9.1 Draining after testing.106
9.2 Rust prevention.106
9.3 Sealing surface protection.106
9.4 Assembly and maintenance instructions.106
9.5 Ring gaskets.106
9.6 Age control of non-metallic materials .106
10 Equipment-specific requirements.107
10.1 Flanged end and outlet connections .107
10.2 Threaded end and outlet connections.140
10.3 Studs and nuts .146
10.4 Ring gaskets.148
10.5 Valves.154
10.6 Casing and tubing heads .169
10.7 Casing and tubing hangers.174
10.8 Tubing-head adapters .179
10.9 Chokes .181
10.10 Tees and crosses.184
10.11 Test and gauge connections for 103,5 MPa and 138,0 MPa (15 000 psi and 20 000 psi)
equipment.189
10.12 Fluid sampling devices .189
10.13 Christmas trees.192
10.14 Cross-over connectors.192
10.15 Adapter and spacer spools.197
10.16 Actuators .198
10.17 Lock screws, alignment pins and retainer screw packing mechanisms .202
10.18 Other end connectors (OECs) .203
10.19 Top connectors .204
10.20 Surface and underwater safety valves and actuators.205
10.21 Bullplugs.210
10.22 Valve-removal plugs.213
10.23 Other pressure-boundary penetrations.213
10.24 Back-pressure valves.214
11 Repair and remanufacture .214
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ISO 10423:2001(E)
Annex A (informative) Purchasing guidelines.215
Annex B (informative) US customary unit tables and data for this International Standard .234
Annex C (informative) Method of calculating stud bolt lengths for type 6B and 6BX flanges.289
Annex D (informative) Recommended flange bolt torque.291
Annex E (informative) Recommended weld groove design dimensions.295
Annex F (informative) Performance verification procedures .299
Annex G (informative) Design and rating of equipment for use at elevated temperatures.333
Annex H (normative) Design and manufacture of surface wellhead running, retrieving and testing
tools, clean-out tools and wear bushings.336
Annex I (normative) Performance verification procedures for surface safety valves and underwater
safety valves.340
Annex J (normative) Repair and remanufacture requirements.348
Annex K (informative) Recommended specifications for top connectors for christmas trees.361
Annex L (normative) Specifications for valve-removal preparations and valve-removal plugs.376
Annex M (informative) List of tables and figures .391
Bibliography.401
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ISO 10423:2001(E)
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.
Draft 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.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 10423 was prepared by Technical Committee ISO/TC 67, Materials, equipment and
offshore structures for petroleum and natural gas industries, Subcommittee SC 4, Drilling and production
equipment.
This second edition cancels and replaces ISO 10419, ISO 10433 and the first edition of ISO 10423
(ISO 10423:1994).
Annexes H, I, J and L form a normative part of this International Standard. Annexes A, B, C, D, E, F, G, K and M
are for information only.
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ISO 10423:2001(E)
Introduction
This International Standard is based on API Spec 6A, seventeenth edition, February 1996, its errata and
supplement, and API Spec 6AV1, first edition, February 1996.
The contents of API Spec 14D (upon which ISO 10433 was based) and API Recommended Practice 14H (upon
which ISO 10419 was based) have been incorporated in API Spec 6A, seventeenth edition.
The International System of units (SI) is used in this International Standard. However, nominal sizes are shown as
fractions in the inch system.
The fractions and their decimal equivalents are equal and interchangeable. Metric conversions and inch
dimensions in this International Standard are based on the original fractional inch designs. Functional dimensions
have been converted into the metric system to ensure interchangeability of products manufactured in metric or inch
systems (see also annex B).
Tables referenced in the main body of this International Standard which are marked with an asterisk are repeated
in annex B in US customary units with the same table number as in the main body but with the prefix B. See also
annex M for listings of tables and figures.
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.
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INTERNATIONAL STANDARD ISO 10423:2001(E)
Petroleum and natural gas industries — Drilling and production
equipment — Wellhead and christmas tree equipment
1 Scope
1.1 Purpose
This International Standard specifies requirements and gives recommendations for the performance, dimensional
and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing,
shipment, purchasing, repair and remanufacture of wellhead and christmas tree equipment for use in the petroleum
and natural gas industries.
This International Standard does not apply to field use, field testing or field repair of wellhead and christmas tree
equipment.
1.2 Applicability
This International Standard is applicable to the following specific equipment.
a) Wellhead equipment:
� casing head housings;
� casing head spools;
� tubing head spools;
� cross-over spools;
� multi-stage head housings and spools.
b) Connectors and fittings:
� cross-over connectors;
� tubing head adapters;
� top connectors;
� tees and crosses;
� fluid-sampling devices;
� adapter and spacer spools.
c) Casing and tubing hangers:
� mandrel hangers;
� slip hangers.
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ISO 10423:2001(E)
d) Valves and chokes:
� single valves;
� multiple valves;
� actuated valves;
� valves prepared for actuators;
� check valves;
� chokes;
� surface and underwater safety valves and actuators;
� back-pressure valves.
e) Loose connectors [flanged, threaded, other end connectors (OEC), and welded]:
� weld neck connectors;
� blind connectors;
� threaded connectors;
� adapter and spacer connectors;
� bullplugs;
� valve-removal plugs.
f) Other equipment:
� actuators;
� hubs;
� pressure boundary penetrations;
� ring gaskets;
� running and testing tools (in annex H);
� wear bushings (in annex H).
The nomenclature used in this International Standard for typical equipment is shown in Figure 1 and Figure 2. All
parts whose physical dimensions conform to the metric tables incorporated into the body of this International
Standard or to the US customary units tables in annex B are acceptable (see Introduction).
1.3 Service conditions
This International Standard defines service conditions, in terms of pressure, temperature and material class for the
well-bore constituents, and operating conditions.
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ISO 10423:2001(E)
1.4 Product specification levels (PSL)
This International Standard establishes requirements for five product specification levels. These five PSL
designations define different levels of technical quality requirements. Annex A provides guidelines (not
requirements) for selecting an acceptable PSL.
Key
1 Back-pressure valve preparation 12 Double studded adapter
2 Subsurface safety valve control line 13 Annular casing pack-off
3 Subsurface safety valve control line outlet 14 Casing hanger (slip style)
4 Tubing head adapter 15 Threaded outlet connection
5 Lock screw 16 Bullplug
6 Tubing hanger pack-off 17 Casing head housing
7 Extended neck tubing hanger with downhole safety valve control line 18 Surface casing
8 Studded side outlet 19 Wellhead support plate
9 Valve removal preparation 20 Tubing pack-off retainer
10 Bottom casing pack-off 21 Tubing hanger (slip style)
11 Tubing head spool 22 Tubing
Figure 1 — Typical wellhead assembly nomenclature
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ISO 10423:2001(E)
Key
23 Studded side outlet connection 29 Casing head spool
24 Extended neck tubing hanger seal 30 Inner casing
25 Annular tubing hanger seal 31 Intermediate casing
26 Tubing hanger mandrel 32 Flanged end connection
27 Flanged outlet connection 33 Tubing hanger mandrel seals
28 Casing hanger mandrel 34 Wrap-around hanger pack-off
Figure 1 — Typical wellhead assembly nomenclature (continued)
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ISO 10423:2001(E)
Key
1 Gauge valve 7 Tee
2 Bonnet nut 8 Wing valve
3 Blanking plug 9 Choke
4 Body 10 Master valve
5 Top connector 11 Tubing head adapter
6 Swab or crown valve
Figure 2 — Typical christmas tree nomenclature
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ISO 10423:2001(E)
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.
ISO 2859-1:1999, Sampling procedures for inspection by attributes � Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection.
ISO 10414-1, Petroleum and natural gas industries � Field testing of drilling and completion fluids and well
cement� Part 1: Water-based fluids.
ISO 10422, Petroleum and natural gas industries� Threading, gauging, and thread inspection of casing, tubing
and line pipe threads� Specification.
ISO 11960, Petroleum and natural gas industries� Steel pipes for use as casing or tubing for wells.
ISO 13533, Petroleum and natural gas industries� Drilling and production equipment� Specification for drill-
through equipment.
ISO 13628-4, Petroleum and natural gas industries� Design and operation of subsea production systems�
Part 4: Subsea wellhead and tree equipment.
ISO 13678, Petroleum and natural gas industries� Evaluation and testing of thread compounds for use with
casing, tubing and line pipe.
1)
API Spec 7:1997, Specification for rotary drill stem elements.
API RP 14F, Recommended practice for design and installation of electrical systems for offshore fixed and floating
production facilities for unclassified and class 1, division 1 and division 2 locations.
2)
ASME B1.1, Unified inch screw threads.
ASME B1.2, Gages and gaging for unified inch screw threads.
ASME B1.20.1, Pipe threads, general purpose (inch).
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:1998, Section IX, Welding and brazing qualifications.
3)
ASNT SNT-TC-1A, Personnel qualifications and certification in non destructive testing.
1) American Petroleum Institute, 1220 L Street North West, Washington, D.C. 20005, USA.
th
2) ASME International, 345 East 47 Street New York, NY 10017-2392, USA.
3) American Society for Non destructive Testing, 4153 Arlingate Plaza, Columbus, OH 43228-0518, USA.
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ISO 10423:2001(E)
4)
ASTM A 193/A 193 M, Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-
Temperature Service.
ASTM A 194/A 194M, Standard Specification for Carbon and Alloy Steel Nuts for Bol
...
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