ISO 10432:1999

Petroleum and natural gas industries - Downhole equipment - Subsurface safety valve equipment

La présente Norme internationale a été élaborée à fin de définir les exigences minimales acceptables pour les équipements de vannes de sécurité de fond (SSSV). Elle concerne les vannes de sécurité de fond, les systèmes les performances ou l'interchangeabilité des équipements des vannes de sécurité de fond. Les systèmes de verrouillage, les mandrins d'ancrage et les vannes de sécurité de fond fabriqués par différents établissements industriels ou constructeurs peuvent être fournis séparément. NOTE: Restrictions : La vanne de sécurité de fond est un équipement de sécurité d'urgence et n'est pas prévue ou conçue pour réaliser des opérations courantes d'exploitation telles que le dusage de la production ou de l'injection, les arrêts programmés de production ou comme clapet anti-retour.

Industries du pétrole et du gaz naturel — Équipement de forage vertical — Vannes de protection de fond de puits

General Information

• Status: Withdrawn
• Publication Date: 03-Nov-1999
• Withdrawal Date: 03-Nov-1999
• ICS: 75.180.10 - Exploratory, drilling and extraction equipment
• Technical Committee: ISO/TC 67/SC 4 - Drilling and production equipment
• Drafting Committee: ISO/TC 67/SC 4/WG 4 - Production equipment
• Current Stage: 9599 - Withdrawal of International Standard
• Start Date: 29-Nov-2004
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 10432:1993 - Petroleum and natural gas industries - Subsurface safety valve equipment - Specification
• Effective Date: 15-Apr-2008
• Revised: ISO 10432:2004 - Petroleum and natural gas industries - Downhole equipment - Subsurface safety valve equipment
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 10432
Second edition
1999-11-01
Petroleum and natural gas industries —
Downhole equipment — Subsurface safety
valve equipment
Industries du pétrole et du gaz naturel — Équipement de forage vertical —
Vannes de protection de fond de puits
A
Reference number
Contents
1 Scope .1
2 Normative references .1
3 Terms and definitions.3
4 Requirements .5
4.1 General.5
4.2 Design requirements .5
4.3 Functional considerations .6
4.4 Design considerations .6
4.5 Verification test .7
5 Materials.7
5.1 General.7
5.2 Metals.7
5.3 Non-metals .8
5.4 Traceability .8
6 Quality control requirements.8
6.1 General.8
6.2 Documentation retention .8
6.3 Personnel qualifications .9
6.4 Calibration systems.9
6.5 Inspection of elastomeric materials.9
6.6 Dimensional inspection.9
6.7 Thread inspection.9
6.8 Welding and brazing.10
©  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
6.9 Qualification of heat treatment equipment . 10
6.10 Coatings and overlays . 10
6.11 Mechanical and physical properties (where required by this International Standard). 10
6.12 NDE requirements . 11
7 Testing . 13
7.1 General . 13
7.2 Verification testing . 14
7.3 Functional testing. 16
7.4 General requirements for an SSSV verification test facility. 16
7.5 SCSSV verification test procedure . 17
7.6 SCSSV gas flow test (record results as per Annex B, Table B.2) . 18
7.7 Drift test (record results as per Annex B, Table B.4). 19
7.8 Liquid leakage test (record results as per Annex B, Table B.6). 19
(record results as per Annex B, Table B.7)
7.9 Unequalized opening test . 19
7.10 Operating-pressure test (record results as per Annex B, Table B.8). 20
7.11 Propane test (record results as per Annex B, Table B.9). 20
7.12 Nitrogen leakage test (record results as per Annex B, Table B.10). 20
7.13 SCSSV Class 1 flow test (record results as per Annex B, Table B.11) . 21
7.14 Controlled-temperature test (record results as per Annex B, Table B.13). 21
7.15 SCSSV Class 2 flow test (record results as per Annex B, Table B.15) . 22
7.16 SSCSV verification test procedure . 22
7.17 SSCSV gas closure test (record results as per Annex B, Table B.17). 23
7.18 Liquid closure test (record results as per Annex B, Table B.18) . 23
7.19 SSCSV Class 1 flow test (record results as per Annex B, Table B.21) . 24
7.20 SSCSV Class 2 flow test (record results as per Annex B, Table B.23) . 24
7.21 SCSSV functional testing. 24
7.22 SSCSV functional testing. 26
7.23 Safety valve landing nipple (SVLN) testing. 28
7.24 Safety valve (SV) lock testing. 29
7.25 Verification test for seal materials . 29
8 Identification, documentation and preparation for transport . 30
iii
© ISO
8.1 Identification.30
8.2 Documentation.31
8.3 Preparation for transport .32
9 Failure reporting and analysis.32
Annex A (informative) Informative tables.33
Annex B (normative) Documentation/reference tables .35
Annex C (informative) Reference test figures.60
Annex D (informative) Failure-reporting recommendations for operators.68
Annex E (normative) Test agency reporting and records (see 7.2.4).70
Annex F (informative) Checklist of suggested ordering information for SSSV equipment.71
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.
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.
This International Standard was developed 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 the first edition (ISO 10432:1993) and includes the changes in API 14A,
ninth edition, 1994, and its Supplement dated December 1997.
Annex B and Annex E form a normative part of this International Standard. Annexes A, C, D and F are for
information only.
v
© ISO
Introduction
This International Standard has been developed by users/purchasers and suppliers/manufacturers of subsurface
safety valve equipment intended for use in the petroleum and natural gas industry worldwide. This International
Standard is intended to give requirements and information to both parties in the selection, manufacture, testing and
use of subsurface safety valve equipment. Further, this International Standard addresses requirements that set the
minimum parameters with which the supplier/manufacturer must comply to claim conformity with this standard.
Users of this International Standard should be aware that further or differing requirements might be needed for
individual applications. This International Standard is not intended to inhibit a supplier/manufacturer from offering, or
the user/purchaser from accepting, alternative equipment or engineering solutions. This may be particularly
applicable where there is innovative or developing technology. Where an alternative is offered, the
supplier/manufacturer should identify any variations from this International Standard and provide details.
Upon publication of ISO 16070, Petroleum and natural gas industries — Downhole equipment — Lock mandrels
and landing nipples, as an International Standard, the requirements for lock mandrels and landing nipples in this
International Standard 10432 will be superseded.
vi
INTERNATIONAL STANDARD  © ISO ISO 10432:1999(E)
Petroleum and natural gas industries — Downhole
equipment — Subsurface safety valve equipment
1 Scope
This International Standard was formulated to provide the minimum acceptable requirements for subsurface safety
valve (SSSV) equipment. It covers subsurface safety valves, safety valve locks, safety valve landing nipples and all
components that establish tolerances and/or clearances which may affect performance or interchangeability of the
SSSV equipment. Safety valve locks, safety valve landing nipples and SSSVs manufactured by different facilities or
manufacturers may be supplied as separate items.
NOTE Limits: The subsurface safety valve is an emergency safety device, and is not intended or designed for operational
activities, such as production/injection reduction, production stop, or as a backflow valve.
2 Normative references
The following normative documents contain provision 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 level (AQL) for lot-by-lot inspection.
ISO 3601-1:1988, Fluid systems — Sealing devices — O-rings — Part 1: Inside diameters, cross-sections,
tolerances and size identification code.
1)
ISO 3601-3:— , Fluid power systems — O-rings — Part 3: Quality acceptance criteria.
ISO 10417:1993, Petroleum and natural gas industries — Subsurface safety valve systems — Design, installation,
operation and repair.
2)
ISO 11960:— , Petroleum and natural gas industries — Steel pipes for use as casing or tubing for wells.
ANSI/NCSL Z540-1:1994, General requirements for calibration laboratories and measuring and test equipment.
API Spec 5B:1996, Threading, gauging, and thread inspection of casing, tubing, and line pipe threads.
API RP 13B1:1990 (and 1993, 1996 supplements), Standard procedure for field testing water-based drilling fluids.
API Manual of Petroleum Measurement Standards, Chapter 10.4:1988 (reaffirmed 1993), Determination of
sediment and water in crude oil by the centrifuge method (field procedure).

1) To be published. (Revision of ISO 3601-3:1987)
2) To be published. (Revision of ISO 11960:1996)
© ISO
ASME Boiler and Pressure Vessel Code, Section II:1998, Materials specification.
ASME Boiler and Pressure Vessel Code, Section V:1998, Nondestructive testing.
ASME Boiler and Pressure Vessel Code, Section VIII:1998, Pressure vessels.
ASME Boiler and Pressure Vessel Code, Section IX:1998, Welding and brazing qualifications.
ASTM A 370:1997, Standard test methods and definitions for mechanical testing of steel products.
ASTM A 388/A 388M:1995, Standard practice for ultrasonic examination of heavy steel forgings.
ASTM A 609/A 609M:1991,Standard practice for castings, carbon, low-alloy, and martensitic stainless steel,
ultrasonic examination thereof.
ASTM D 395:1998, Standard test methods for rubber property — Compression set.
ASTM D 412:1998, Standard test methods for vulcanized rubber and thermoplastic rubbers and thermoplastic
elastomers — Tension.
ASTM D 1414:1994, Standard test methods for rubber O-rings.
ASTM D 1415:1988, Standard test methods for rubber property — International hardness.
ASTM D 2240:1997, Standard test methods for rubber property — Durometer hardness.
ASTM E 10:1998, Standard test method for Brinell hardness of metallic materials.
ASTM E 18:1997,
Standard test methods for Rockwell hardness and Rockwell superficial hardness of metallic
materials.
ASTM E 92:1982, Standard test method for Vickers hardness of metallic materials.
ASTM E 94:1993, Standard guide for radiographic testing.
ASTM E 140:1997, Standard hardness conversion tables for metals.
ASTM E 165:1995, Standard test method for liquid penetrant examination.
ASTM E 186:1993, Standard reference radiographs for heavy-walled [2 to 4 1/2-in. (51 to 114-mm)] steel castings.
ASTM E 280:1993, Standard reference radiographs for heavy-walled [4 1/2 to 12-in. (114 to 305-mm)] steel
castings.
ASTM E 428:1992, Standard practice for fabrication and control of steel reference blocks used in ultrasonic
inspection
ASTM E 446:1993, Standard reference radiographs for steel castings up to 2 in. (51 mm) in thickness.
ASTM E 709:1995, Standard guide for magnetic particle examination.
MIL-H-6875H:1989, Process for heat treatment of steel.
NACE MR0175:1992, Sulfide stress cracking resistant metallic materials for oilfield equipment.
SNT-TC-1A:1988, Personnel qualification and certification in nondestructive testing.
BS 2M 54:1991, Specification for temperature control in the heat treatment of metals.
© ISO
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply:
3.1
AQL
acceptance quality level
3.2
bean
the orifice or designed restriction causing the pressure drop in velocity-type SSCSVs
3.3
chloride stress corrosion cracking
cracking under the combined action of tensile stress and corrosion in the presence of chlorides and water
3.4
design acceptance criteria
defined limits placed on characteristics of materials, products,or services, established by the manufacturer to
ensure conformance to the product design
3.5
end connection
SSSV equipment/tubular connecting interface
3.6
failure
any condition of SSSV equipment that prevents it from performing the design function
3.7
fit
the geometric relationship between parts
NOTE This would include the tolerance criteria used during the design of a part and its mating parts, including seals
adjusted to or shaped for their purpose.
3.8
form
the essential shape of a product including all its component parts
3.9
function
the operation of a product during service
3.10
functional test
test performed to confirm proper operation of SSSV equipment
3.11
heat treatment
heat treating
alternate steps of controlled heating and cooling of materials for the purpose of changing physical or mechanical
properties
3.12
interchangeable
conforming in every detail, within specified tolerances, to both fit and function of a safe design but not necessarily to
the form
© ISO
3.13
manufacturer
the principal agent in the design, fabrication and furnishing of SSSV equipment, who chooses to comply with this
International Standard
3.14
model
SSSV equipment with unique internal part(s) and operating characteristics which differentiate it from other SSSV
equipment of the same type
NOTE It may have any of a variety of end connections.
3.15
NDE
nondestructive examination
3.16
operating manual
a publication issued by the manufacturer which contains detailed data and instructions related to the design,
installation, operation and maintenance of SSSV equipment
3.17
operator
a user of SSSV equipment
3.18
SCSSV
a surface-controlled subsurface safety valve
3.19
SSCSV
a subsurface-controlled subsurface safety valve
NOTE An SSCSV is actuated by the characteristics of the well.
3.20
SSSV
a subsurface safety valve (a device whose design function is to prevent uncontrolled well flow when closed)
NOTE These devices may be installed and retrieved by wireline or pump-down methods (wireline-retrievable) or be an
integral part of the tubing string (tubing retrievable).
3.21
SSSV equipment
the subsurface safety valve, safety valve lock, safety valve landing nipple and all components that establish
tolerances and/or clearances which may affect performance or interchangeability of the SSSV equipment
3.22
stress corrosion cracking
cracking which results from a combination of corrosion and stress when susceptible materials are exposed to
specific corrosive media
3.23
stress relief
controlled heating of material to a predetermined temperature for the purpose of reducing any residual stresses
3.24
sulfide stress cracking
cracking under the combined action of tensile stress and corrosion in the presence of water and hydrogen sulfide
© ISO
3.25
SV lock
a device attached to or a part of the SSSV that holds the SSSV in place
3.26
SVLN
a receptacle with internal sealing surfaces in which an SSSV may be installed
NOTE It may include recesses for locking devices to hold the SSSV in place and may be ported for communication to an
outside source for SSSV operation.
3.27
test agency
any party which provides a test facility and administers a test programme that meets the verification test
requirements of this International Standard
3.28
type
SSSV equipment with unique characteristics which differentiate it from other SSSV equipment
NOTE The SCSSV, the velocity-type SSCSV and the low-tubing-pressure-type SSCSV are examples of SSSV types.
3.29
verification test
test performed to qualify a particular size, type and model of SSSV equipment for a specific class of service
3.30
weight loss corrosion
loss of metal in areas exposed to fluids which contain water or brine and carbon dioxide (CO ), oxygen (O ) or other
2 2
corrosive agents
4 Requirements
4.1 General
The user shall provide to the manufacturer the information required to define the appropriate product. Annex F
contains a checklist of suggested ordering information.
4.2 Design requirements
4.2.1  Drawings, manufacturing specifications and the verification test results shall be retained by the manufacturer
for a period of ten years after SSSVs of that size, model and type are discontinued from the manufacturer's product
line. SSSV equipment conforming to this International Standard shall be manufactured to drawings and
specifications that are substantially the same as those of the SSSV equipment that has passed the verification test.
4.2.2  Documentation of designs shall include methods, assumptions, calculations and design requirements.
Design requirements shall include but not be limited to those criteria for size, test and operating pressures, material,
environmental and other pertinent requirements upon which the design is based. Design documentation shall be
clear, legible, reproducible and retrievable.
4.2.3  Design documentation shall be reviewed and verified by a qualified individual other than the individual who
created the original design.
4.2.4  Changes to the design acceptance criteria which may affect verification test performance or interchange-
ability of SSSV equipment shall require requalification, except that seals which have passed the applicable
verification test requirements of clause 7 shall be considered interchangeable among the SSSV equipment of any
one manufacturer for a particular class of service.
© ISO
4.2.5  SSSV equipment manufactured in accordance with this International Standard shall conform to one or more
of the following classes of service:
 Class 1: standard service. This class of SSSV equipment is intended for use in wells which do not exhibit the
detrimental effects caused by sand or corrosive agents.
 Class 2: sandy service. This class of SSSV equipment is intended for use in wells where a substance such as
sand could be expected to cause SSSV equipment failure. Class 2 SSSV equipment shall also meet the
requirements for Class 1 service.
 Class 3: stress corrosion cracking service. This class of SSSV equipment is intended for use in wells where
corrosive agents could be expected to cause stress corrosion cracking. Class 3 equipment shall meet the
requirements for Class 1 or Class 2 and be manufactured from materials which are resistant to stress corrosion
cracking. Within this service class, there are two divisions, 3S for sulfide stress cracking service and 3C (see
note) for chloride stress cracking service. Metallic materials, suitable for a 3S environment, shall be in
accordance with NACE MR0175.
NOTE Metallic materials suitable for Class 3C service are dependent on specific well conditions. No national or
international standards exist for the application of metallic materials for this class of service.
 Class 4: weight loss corrosion service. This class of SSSV equipment is intended for use in wells where
corrosive agents could be expected to cause weight loss corrosion. Class 4 equipment shall meet the
requirements for Class 1 or Class 2 and be manufactured from materials which are resistant to weight loss
corrosion (see note).
NOTE Metallic materials suitable for Class 4 service are dependent on specific well conditions. No national or international
standards exist for the application of metallic materials for this class of service.
4.3 Functional considerations
SSSV design shall permit prediction and repeatability of rates, pressures or other conditions required for closure.
4.4 Design considerations
4.4.1  The manufacturer shall establish rated working pressures of SSSV equipment within the requirements of this
International Standard. These rated working pressures are commonly 20,7 MPa, 34,5 MPa, 41,4 MPa, 69,0 MPa
and 103,5 MPa (3 000 psi, 5 000 psi, 6 000 psi, 10 000 psi and 15 000 psi). Temperature effects on all the materials
used in the manufacture of SSSV equipment shall be considered in establishing the rated working pressure. The
design shall take into account the effects of pressure containment and pressure-induced loads. Specialized
conditions shall also be considered such as pressure testing with temporary test plugs.
4.4.2  The manufacturer shall establish internal yield pressure, collapse pressure and minimum tensile strength
ratings, excluding end connections.
4.4.3  SSSV equipment design shall take into consideration the effects of temperature gradients and thermal cycles
on all components. The upper temperature limit shall be the lowest high-temperature rating of any component of the
SSSV. The lower temperature limit shall be the highest low-temperature rating of any component of the SSSV.
Derating of metal mechanical properties shall be in accordance with ASME Boiler and Pressure Vessel Code
Section II, Part D, Material Properties.
4.4.4  SSSV equipment design shall take into account the effects of retained fluid(s) on all components. SSSV
equipment design shall consider the effects of sand, chlorides, corrosion inhibitors and other chemicals routinely
encountered in oil and gas production.
4.4.5  Component and subassembly interchangeability shall be required within each manufacturer's service class,
size, type and model, including pressure rating of SSSV equipment. This shall extend to all facilities of the
manufacturer. Components shall be designed or identified to avoid the use of non-interchangeable parts.
4.4.6  Additive dimensional tolerance shall be such that proper operation of the SSSV equipment is assured. This
requirement applies to factory-assembled equipment and to replacement components.
© ISO
4.4.7  Internal diameters and tolerances for typical-size SVLNs are listed in Annex A, Table A.1. External diameters
and tolerances for typical-size wireline-retrievable SSSVs are listed in Annex A, Table A.2. The manufacturer may
establish other dimensions and tolerances.
4.5 Verification test
SSSVs, SV locks, SVLNs and seals shall pass the applicable verification test specified in clause 7.
5 Materials
5.1 General
The manufacturer shall have written specifications for all materials used in SSSV equipment. The manufacturer
shall select all materials to be suitable for a particular class of service and shall document the selection criteria. All
materials shall comply with the manufacturer's written specifications.
Material substitutions, except seals, in qualified SSSV equipment are allowed without verification testing provided
that the manufacturer's selection criteria are documented and meet all other requirements of this International
Standard.
Seals that have passed the verification test requirements of 7.25 are considered interchangeable among the SSSV
equipment of any one manufacturer for a particular class of service.
5.2 Metals
5.2.1  The manufacturer’s specifications shall define:
a) chemical-composition limits;
b) heat treatment conditions;
c) mechanical-property limits:
1) tensile strength,
2) yield strength,
3) elongation,
4) hardness.
5.2.2  The mechanical properties specified in 5.2.1 for traceable metal components shall be verified by tests
conducted on a material sample produced from the same heat of material. The material sample shall experience the
same heat treatment process as the component it qualifies. Material subsequently heat-treated from the same heat
of material shall be hardness-tested after processing to confirm compliance with the hardness requirements of the
manufacturer’s specifications. The hardness results shall verify through documented correlation that the mechanical
properties of the material tested meet the properties specified in 5.2.1. The heat treatment process parameters shall
be defined in the heat treatment procedure. Hardness testing is the only mechanical-property test required after
stress relieving. Material test reports provided by the material supplier or the manufacturer are acceptable
documentation.
5.2.3  Each welded component shall be stress-relieved as per the manufacturer's written specifications and, where
applicable, in accordance with Paragraphs UCS-56 and UHA-32, Section VIII, Division 1, Subsection C, ASME
Boiler and Pressure Vessel Code. In addition, carbon and low-alloy steel weldments on Class 3 SSSV equipment
shall be stress-relieved in accordance with NACE MR0175.
© ISO
5.3 Non-metals
5.3.1  The manufacturer shall have written procedures, and documentation of test results, for testing sealing
materials to the limits for which the SSSV equipment is rated.
5.3.2  The manufacturer's written specifications for non-metallic compounds shall define those characteristics
critical to the performance of the material, such as:
a) compound type;
b) mechanical properties, as a minimum:
1) tensile strength (at break),
2) elongation (at break),
3) tensile modulus (at 50 % or 100 %, as applicable);
c) compression set;
d) durometer hardness.
5.3.3  The manufacturer's written specifications shall include handling, storage and labelling requirements,
including the cure date, batch number, compound identification and shelf life appropriate to each compound.
5.4 Traceability
5.4.1  All components, weldments, subassemblies and assemblies of SSSV equipment shall be traceable except:
a) setting springs used to establish closure parameters for SSCSVs;
b) beans for SSCSVs;
c) common hardware items such as nuts, bolts, set screws, shear pins, spacers, tube fittings, tubing and shear
screws.
5.4.2  Component traceability is considered sufficient when it can be traced to a job lot, which identifies the
included heat or batch lot(s) and a material test report. All components in a multiheat job lot are rejectable if any
heat lot does not comply with the manufacturer's written specification.
5.4.3  Traceability identification shall be sufficient to identify significant problems and permit proper corrective
action and shall include assembly, subassembly and component traceability to a heat or other appropriate batch lot.
5.4.4  Traceability for SSSV equipment is considered sufficient if the equipment meets the requirements of this
International Standard when it leaves the manufacturer's inventory.
6 Quality control requirements
6.1 General
This clause provides minimum quality control requirements to meet this International Standard. All quality control
work shall be controlled by documented instructions which include acceptance criteria.
6.2 Documentation retention
Required documentation for quality control work shall be retained for a minimum of five years from the date of
origination.
© ISO
6.3 Personnel qualifications
6.3.1  Personnel performing NDE shall be qualified in accordance with at least SNT TC-1A, Level II, for evaluation
and interpretation.
6.3.2  Personnel performing visual examinations shall have an annual eye examination in accordance with
SNT-TC-1A, as applicable to the discipline to be performed.
6.3.3  All other personnel performing inspection for acceptance shall be qualified in accordance with documented
requirements.
6.4 Calibration systems
6.4.1  Measuring and testing equipment used for acceptance shall be identified, controlled, calibrated and adjusted
at specified intervals in accordance with written specifications, ANSI/NCSL Z540-1 and this International Standard.
6.4.2  Pressure-measuring devices shall:
a) be readable to at least – 0,5 % of full-scale range;
b) be calibrated to maintain – 2 % accuracy of full-scale range.
6.4.3  If a pressure gauge is utilized, pressure measurements shall be made at not less than 25 % nor more than
75 % of the full span of the pressure gauge.
6.4.4  Pressure-measuring devices shall be periodically calibrated with a master pressure-measuring device or a
dead-weight tester at 25 %, 50 % and 75 % of full scale.
6.4.5  Calibration intervals for pressure-measuring devices shall be a maximum of three months until documented
calibration history can be established. Calibration intervals shall then be established based on repeatability, amount
of usage and documented calibration history.
6.5 Inspection of elastomeric materials
6.5.1  Sampling procedures, and the basis for acceptance or rejection of a batch lot, shall be in accordance with
ISO 2859-1 general inspection level II at a 2,5 AQL for O-rings and a 1,5 AQL for other packing elements until a
documented variation history can be established. Sampling procedures shall then be established based on the
documented variation history.
6.5.2  Visual inspection of O-rings shall be in accordance with ISO 3601-3. Other packing elements shall be visually
inspected in accordance with the manufacturer's documented specifications.
6.5.3  Dimensional tolerances of O-rings shall be in accordance with ISO 3601-1 or equivalent. Other packing
elements shall meet dimensional tolerances of the manufacturer's written specifications.
The durometer hardness of O-rings or other elastomeric packing elements shall be determined in
6.5.4
accordance with ASTM D 2240 or D 1415. A test specimen manufactured from each batch may be used.
6.6 Dimensional inspection
All traceable components, except elastomeric seals, shall be dimensionally inspected to assure proper function and
compliance with design specifications and drawings.
6.7 Thread inspection
6.7.1  All API tapered-thread tolerances, inspection requirements, gauging, gauging practice, gauge calibration and
gauge certification shall be in accordance with API Spec 5B.
6.7.2  All other thread tolerances, inspection requirements, gauging, gauging practice, gauge calibration and gauge
certification shall conform to the specified thread manufacturer’s written specifications.
© ISO
6.8 Welding and brazing
6.8.1  Welding and brazing procedure and personnel qualification shall be in accordance with ASME Boiler and
Pressure Vessel Code Section IX.
6.8.2  Material and practices not listed in ASME Boiler and Pressure Vessel Code Section IX shall be applied using
welding procedures qualified in accordance with the methods of ASME Boiler and Pressure Vessel Code
Section IX.
6.9 Qualification of heat treatment equipment
6.9.1 Furnace calibration
Heat treatment of production parts shall be performed with heat treatment equipment that has been calibrated and
surveyed.
Each furnace shall be surveyed within one year prior to heat treatment operations. When a furnace is repaired or
rebuilt, a new survey shall be carried out before heat treatment.
Batch-type and continuous-type heat treatment furnaces shall be calibrated in accordance with one of the following
procedures:
a) the procedure specified in MIL-H-6875H, Section 5;
b) the procedure specified in BS 2M 54:1991, Section 7;
c) the manufacturer's written specifications, including acceptance criteria which are not less stringent than the
procedures identified above.
6.9.2 Instruments
Automatic controlling and recording instruments shall be used.
Thermocouples shall be located in the furnace working zone(s) and protected from furnace atmospheres.
The controlling and recording instruments used for the heat treatment processes shall possess an accuracy of
– 1 % of their full-scale range.
Temperature-controlling and recording instruments shall be calibrated at least once every three months until a
documented calibration history can be established. Calibration intervals shall then be established based on
repeatability, degree of usage and documented calibration history.
Equipment used to calibrate the production equipment shall possess an accuracy of – 0,25 % of full-scale range.
6.10 Coatings and overlays
Coatings and overlays shall be controlled by documented instructions which include acceptance criteria.

6.11 Mechanical and physical properties (where required by this International Standard)
6.11.1  Mechanical-property test procedures and practices shall be in accordance with ASTM A 370 for the metallic
materials used for traceable components. Hardness testing shall be in accordance with ASTM E 10 or E 18
(ASTM E 92 may be used when E 10 or E 18 cannot be applied due to size, accessibility or other limitations).
Hardness conversion to other measurement units shall be in accordance with ASTM E 140, with the exceptions
noted in NACE MR0175 for Class 3 equipment.
6.11.2  Mechanical-property test procedures for elastomeric compound types shall be in accordance with:
a) tensile-elongation modulus:
© ISO
1) O-Rings — ASTM D 1414,
2) all others — ASTM D 412;
b) compression set:
1) O-Rings — ASTM D 1414,
2) all others — ASTM D 395;
c) durometer hardness:
1) O-Rings — ASTM D 1415,
2) all others — ASTM D 2240.
6.12 NDE requirements
6.12.1  All NDE instructions shall be approved by a Level III examiner.
6.12.2  All primary closure springs shall be magnetic-particle or liquid-penetrant inspected to verify conformance
with the manufacturer's written specifications.
6.12.3  All pressure-containing welds shall be magnetic-particle or liquid-penetrant inspected for surface defects
and shall be volumetrically inspected by radiographic or ultrasonic techniques to verify conformance with the
manufacturer’s written specifications.
6.12.4  All pressure-containing castings and forgings shall be magnetic-particle or liquid-penetrant inspected for
surface defects and shall be volumetrically inspected by radiographic or ultrasonic techniques to verify conformance
with the manufacturer’s written specifications. The manufacturer may develop AQL inspection levels based on
documented variation history.
6.12.5  NDE methods and acceptance criteria are as follows:
6.12.5.1  Liquid penetrant
a) Method — ASTM E 165.
b) Acceptance criteria — ASME Boiler and Pressure Vessel Code, Section VIII, Pressure Vessels, Division 1,
Appendix 8.
6.12.5.2  Wet magnetic-particle examination
a) Method — ASTM E 709.
b) Definitions:
1) Relevant indication — only those indications with major dimensions greater than 1,6 mm (1/16 in) shall be
considered relevant. Inherent indications not associated with a surface rupture (i.e. magnetic-permeability
variations, non-metallic stringers, etc.) are considered non-relevant.
2) Linear indication — any indication in which the length is equal to or greater than three times its width.
3) Rounded indication — any indication which is circular or elliptical with its length less than three times the
width.
c) Acceptance criteria:
1) Any relevant indication 4,8 mm (3/16 in) or greater is unacceptable. No relevant linear indications are
allowed for weldments.
© ISO
2 2
2) No more than ten relevant indications in any 39 cm (6 in ) area.
3) Four or more rounded relevant indications in a line separated by less than 1,6 mm (1/16 in) are
unacceptable.
6.12.5.3  Ultrasonic inspection — weldments
a) Method — ASME Boiler and Pressure Vessel Code, Section V, Nondestructive Examination, Article 5.
b) Acceptance criteria — ASME Boiler and Pressure Vessel Code, Section VIII, Pressure Vessel, Division 1,
Appendix 12.
6.12.5.4  Ultrasonic inspection — castings
a) Method — ASTM E 428 and ASTM A 609.
b) Acceptance criteria — ASTM A 609 ultrasonic-testing quality level 1, minimum.
6.12.5.5  Ultrasonic inspection — forgings and wrought products
a) Method — ASTM E 428 and ASTM A 388.
b) Calibration:
1) Back-reflection technique — the instrument shall be set so that the first back-reflection is 75 % – 5 % of
screen height when the transducer is placed on an indication-free area of the forging or wrought product.
2) Flat-bottom hole technique — the distance-amplitude curve (DAC) shall be based on a 3,2 mm (1/8 in) flat-
bottom hole through 101,6 mm (4 in) of metal and a 6,4 mm (1/4 in) flat-bottom hole for metal distances
exceeding 101,6 mm (4 in).
3) Angle beam technique — the distance-amplitude curve (DAC) shall be based on a notch of depth equal to
the lesser of 9,5 mm (3/8 in) or 3 % of the normal section thickness [9,5 mm (3/8 in) maximum], a length of
approximately 25,4 mm (1 in) and a width not greater than twice its depth.
c) Acceptance criteria — the following forging or wrought-product defects are rejectable:
1) Back-reflection technique — indications greater than 50 % of the referenced back-reflection accompanied
by a complete loss of back-reflection.
2) Flat-bottom hole technique — indications equal to or larger than the indications observed from the
calibration flat-bottom hole.
3) Angle beam technique — amplitude of the discontinuities exceeding that of the reference notch.
6.12.5.6  Radiographic inspection — weldments
a) Method — ASTM E 94.
b) Acceptance criteria — ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, Pressure Vessel,
UW-51.
6.12.5.7  Radio
...