oSIST prEN ISO 13680:2026

• Abstract:

  This document specifies the technical delivery conditions for corrosion-resistant alloy seamless products for casing, tubing, coupling stock and accessory material (including coupling stock and accessory material from bar) for two product specification levels:; PSL-1, which is the basis of this document;; PSL-2, which provides additional requirements for a product that is intended to be both corrosion and cracking resistant for the environments and qualification method specified in Annex G and in the ISO 15156 series or NACE MR0175.; This document contains no provisions relating to the connection of individual lengths of pipe. Demonstration of conformance to ISO 15156-3:2020 or NACE MR0175-2021 of material affected by end sizing, connection manufacture or welding operations is outside the scope of this document.; This document contains provisions relating to marking of tubing and casing after threading.; This document is applicable to the following five groups of products:; a) group 1, which is composed of stainless alloys with a martensitic or martensitic/ferritic structure;; b) group 2, which is composed of stainless alloys with a ferritic-austenitic structure, such as duplex and super-duplex stainless alloy;; c) group 3, which is composed of stainless alloys with an austenitic structure (iron base);; d) group 4, which is composed of nickel-based alloys with an austenitic structure (nickel base);; e) group 5, which is composed of bar only (Annex F) in age-hardened (AH) nickel-based alloys with austenitic structure.

• Status: Not Published
• Public Enquiry End Date: 30-Jul-2026
• ICS: 75.180.10 - Exploratory, drilling and extraction equipment
• ICS: 77.140.75 - Steel pipes and tubes for specific use
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 11-Jun-2026
• Due Date: 29-Oct-2026
• Completion Date: 03-Aug-2026
• Ref Project: prEN ISO 13680 - Oil and gas industries including lower carbon energy — Corrosion-resistant alloy seamless products for use as casing, tubing, coupling stock and accessory material — Technical delivery conditions

• Revises: SIST EN ISO 13680:2025 - Oil and gas industries including lower carbon energy - Corrosion-resistant alloy seamless products for use as casing, tubing, coupling stock and accessory material - Technical delivery conditions (ISO 13680:2024)
• Effective Date: 01-Apr-2026

oSIST prEN ISO 13680:2026 is the Slovenian draft adoption of ISO/DIS 13680, issued by SIST for the oil and gas industries including lower carbon energy. It specifies technical delivery conditions for corrosion-resistant alloy seamless products used as casing, tubing, coupling stock and accessory material, with product specification level (PSL) options for base supply and higher corrosion- and cracking-resistant service.

What does oSIST prEN ISO 13680:2026 specify?

oSIST prEN ISO 13680:2026 sets the technical delivery conditions for seamless CRA products for casing, tubing, coupling stock and accessory material, including bar used for accessory material and coupling stock. It also sets marking, inspection, testing, packaging and facility expectations so buyers and manufacturers can order and supply the same product with the same acceptance basis.

The document is organized into clauses for scope, references, terms, general rules, purchaser information, manufacturing, material requirements, dimensions, inspection and testing, surface treatment, marking, surface protection, documents, handling and storage, and minimum facility requirements. Separate annexes provide the detailed tables, figures, PSL-2 rules and special provisions for bar stock and threading.

Annex	What it covers
Annex A	SI tables for product categories, chemistry, mechanical properties, impact requirements, tolerances, colour coding and test data
Annex B	Figures in SI and USC units, including straightness, hardness, impact orientation, colour coding, NDE indicators and straightening
Annex C	USC tables matching Annex A
Annex D	Purchaser inspection and witnessing
Annex E	Cleanliness requirements used when Charpy V-notch test frequency is reduced
Annex F	Bar stock for coupling blanks and tubular accessories
Annex G	PSL-2 requirements, marking and alloy or grade update process
Annex H	Manufacturing procedure qualification test (MPQT) and new alloy or grade submission data
Annex I	Microstructure photo examples for groups 1, 2 and 3
Annex J	Threading and applying couplings to casing and tubing
Annex K	SI to USC conversion principles

What are the key requirements of oSIST prEN ISO 13680:2026?

Product levels, product groups and ordering

oSIST prEN ISO 13680:2026 is built around PSL-1 and PSL-2. PSL-1 is the base requirement set, while PSL-2 adds extra requirements for products intended to be corrosion resistant and cracking resistant for the environments and qualification method in Annex G and the NACE MR0175/ISO 15156 series.

The buyer has to state the order details needed to define the product, including quantity, product designation, category or grade, dimensions, length, tolerances, handling, inspection and threading options. In practice, this means the purchase agreement is not just an order form - it is part of the technical specification.

The document applies to product groups 1, 2, 3 and 5. Group 5 is bar only and is handled in Annex F, which matters because bar stock for accessories is treated differently from tubular product.

Manufacturing control, heat treatment and traceability

Clause 6 limits melting and refining to named routes and requires process control that prevents surface effects such as chromium depletion. Group 1 pipes and group 2 solution-annealed pipes are required to be full-length heat treated after upsetting, and group 2 must be supplied in solution-annealed and liquid-quenched condition, or in that condition followed by cold hardening.

For group 1, stress relieving is permitted, while group 2 does not allow stress relieving and group 3 requires validation if stress relieving is used. That matters because the wrong thermal route can change corrosion resistance or cracking resistance even if the chemistry is correct.

Clause 6 also requires traceability of heat, re-melt ingot and lot identity until all tests and inspections are completed, and each length has to be uniquely identified. The manufacturer therefore has to be able to connect a finished length back to its tests and process history.

Clause 6.7 introduces the manufacturing procedure qualification test (MPQT), and Annex H describes how a purchaser can ask for qualification of a new product or a process change. This is the route used when a buyer wants proof that a specific manufacturing route works before routine supply begins.

Chemistry, mechanical properties and corrosion performance

Clause 7 sets chemistry limits in Tables A.2/C.2 for PSL-1 and Tables A.29/C.29 for PSL-2. For group 2, the pitting-resistance equivalent number (PREN) is part of the chemical requirement, so the buyer is not only buying elemental composition but also a corrosion-performance basis.

Clause 7.2 and 7.3 control tensile properties and hardness. The standard also requires a relationship between tensile strength and yield strength, so a material cannot meet the minimum yield value and still have an unacceptably small strength margin.

Impact performance is treated in detail in Clauses 7.4 to 7.8. The document uses a specimen-size hierarchy, allows smaller specimens with reduced-energy factors, requires low-temperature Charpy V-notch testing for group 2 at -46 °C, and allows flattening tests where the product size prevents the required impact specimens from being machined. In practice, this tells the producer what can be tested from the actual wall thickness and tells the buyer how brittle-fracture resistance is being checked.

Clause 7.9 adds corrosion testing, including a pitting corrosion test for group 2. Clause 9.9 uses full-thickness specimens, one test per lot, ASTM G48 Method A, and 20x magnification for pit assessment, with penetrant testing used as a referee when the pit interpretation is unclear.

Clause 7.10 requires microstructure control for groups 1, 2 and 3, and Annex I shows acceptable and unacceptable examples. That matters because duplex balance, intermetallic phases and other microstructural features can affect service behaviour long before a visual defect appears.

Dimensions, surface condition, testing and identification

Clause 8 controls outside diameter, wall thickness, mass, length, straightness, drift and product ends. Clause 7.11 requires the internal surface of pipes to be free from scale and annealing residues, and any special surface finish has to be stated by the purchaser. That means the buyer needs to define finish expectations early, especially where the product will be threaded or handled in corrosive environments.

Clause 9 defines the inspection and test programme. It includes chemical analysis, tensile, hardness, impact, flattening, pitting corrosion, microstructural examination, dimensional testing, drift testing, mass, visual inspection, non-destructive examination (NDE) and positive material identification (PMI). The test types and frequencies are tied to Tables A.21/C.21, so the sample plan is part of the standard.

NDE is not left to local practice. Clause 9.17 requires qualified personnel, full-body NDE for groups 2 and 3 with 100% coverage for imperfections other than wall thickness, and documented system capability records. PMI is mandatory for all lengths of groups 2 and 3, and it must verify at least Cr, Ni and Mo. In practice, this is how the standard protects the buyer from mix-ups between material categories.

Marking, records, handling and facilities

Clause 11 requires colour coding and paint or ink stencilling, with PSL-2 marked as L2 or L2A where agreement applies. Clause 13 requires retention of test and calibration records for 10 years after purchase, which matters for traceability, audits and dispute handling.

Clauses 14 and 15 cover handling, packaging, storage and minimum facility requirements. The document expects product to be protected from damage and corrosion, and it sets the minimum capabilities for pipe mills, bar mills, processors, coupling or pup-joint manufacturers and subcontractors. This matters because the standard is written for an industrial supply chain, not just a test lab.

What terms does oSIST prEN ISO 13680:2026 define?

• Corrosion-resistant alloy (CRA) - An alloy intended to resist general corrosion, localized corrosion or environmental cracking in environments that attack carbon and low-alloy steels.
• Product specification level (PSL) - The supply level used in the document; PSL-1 is the base level and PSL-2 adds extra corrosion- and cracking-resistance requirements.
• Cold-hardened (CH) - A condition in which the required mechanical properties are obtained by cold finishing without subsequent heat treatment.
• Solution-annealed (SA) - A heat-treatment condition used for some groups before final delivery, especially where corrosion resistance and ductility are needed.
• Quenched and tempered (QT) - A heat-treated condition for certain products where hardening is followed by tempering to reach the required property range.
• Manufacturing procedure qualification test (MPQT) - A qualification program used to prove a product or process change before routine manufacture.
• Non-destructive examination (NDE) - Inspection methods such as ultrasonic, magnetic-particle or other examinations that assess the product without destroying it.
• Positive material identification (PMI) - A method used to confirm that the inspected length matches the specified material category by detecting key alloying elements.

Who uses oSIST prEN ISO 13680:2026?

This standard is used by buyers, manufacturers, quality managers, inspectors and testing laboratories in the oil and gas industries including lower carbon energy. It is also used by pipe mills, bar mills, processors, coupling and pup-joint manufacturers, and subcontractors that perform heat treatment, marking, NDE or other qualified operations.

In practice, buyers use it to write purchase requirements, manufacturers use it to define process routes and test plans, and inspectors use it to check acceptance, traceability and conformance. It is especially relevant for sour-service or corrosion-critical applications where PSL-2 is being considered.

What changed in oSIST prEN ISO 13680:2026 from the previous edition?

• Compared with ISO 13680:2024, former groups 3 and 4 are consolidated into group 3 to align with the NACE MR0175/ISO 15156 series.
• Group 4 is no longer used.
• Group 5 remains unchanged to avoid confusion with earlier editions.

Which standards are used with oSIST prEN ISO 13680:2026?

Standard	What it contributes
ISO 377	Location and preparation of samples and test pieces for mechanical testing
ISO 404	General technical delivery requirements for steel and steel products
ISO 6508-1 and ISO 6508-2	Rockwell hardness test method and verification or calibration of hardness machines
ISO 6892-1 and ISO 6892-2	Tensile testing at room temperature and elevated temperature
ISO 3452-1	Penetrant testing principles
ISO 8501-1	Visual assessment of surface cleanliness after blasting
ISO 9712	Qualification and certification of NDT personnel
ISO 4948-1, ISO 4948-2 and ISO 6929	Steel classification and product vocabulary
ISO 4885	Heat-treatment vocabulary
ISO 15156 series / NACE MR0175	Sour-service qualification basis for PSL-2
ASTM G48 Method A	Pitting corrosion test method used for group 2
ASTM E1476 or API RP 578	PMI methods used to confirm alloy identity

What does the oSIST prEN ISO 13680:2026 document contain?

The document contains chemistry tables, mechanical property tables, impact-energy tables, hardness limits, dimensional tolerances, drift mandrel sizes, colour codes, and test-frequency tables in both SI and USC units. It also contains process and inspection procedures for melting, heat treatment, straightening, dimensional measurement, pitting corrosion testing, microstructure evaluation, NDE, PMI and final marking.

Annex B gives figures for straightness checks, hardness indentation placement, impact specimen orientation, colour band position, NDE reference indicators and straightening geometry. Annex I provides photographic microstructure examples so inspectors can compare actual product with accepted and rejected conditions.

Annex F extends the document to bar stock for coupling blanks and tubular accessories, including its own property tables and inspection requirements. Annex G defines how PSL-2 is applied and marked, Annex H defines MPQT content, Annex J explains threading and coupling application, and Annex K explains the SI to USC conversion approach used throughout the document.

SLOVENSKI STANDARD
01-julij-2026
Naftna in plinska industrija, vključno z nizkoogljično energijo - Nevarjeni izdelki iz
korozijsko odpornih zlitin, ki se uporabljajo kot zaščitne, proizvodne in priključne
cevi ter pribor - Tehnični dobavni pogoji (ISO/DIS 13680:2026)
Oil and gas industries including lower carbon energy - Corrosion-resistant alloy seamless
products for use as casing, tubing, coupling stock and accessory material - Technical
delivery conditions (ISO/DIS 13680:2026)
Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone -
Produits sans soudure en acier allié résistant à la corrosion utilisés comme tubes de
cuvelage, tubes de production, tubes-ébauches pour manchons et matériau pour
accessoires - Conditions techniques de livraison (ISO/DIS 13680:2026)
Ta slovenski standard je istoveten z: prEN ISO 13680
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 13680
ISO/TC 67/SC 5
Oil and gas industries including
Secretariat: JISC
lower carbon energy — Corrosion-
Voting begins on:
resistant alloy seamless products
2026-06-01
for use as casing, tubing, coupling
Voting terminates on:
stock and accessory material —
2026-08-24
Technical delivery conditions
Industries du pétrole et du gaz, y compris les énergies à faible
teneur en carbone — Produits sans soudure en acier allié
résistant à la corrosion utilisés comme tubes de cuvelage, tubes
de production, tubes-ébauches pour manchons et matériau pour
accessoires — Conditions techniques de livraison
ICS: 75.180.10; 77.140.75
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
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RECIPIENTS OF THIS DRAFT ARE INVITED
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 13680:2026(en)
DRAFT
ISO/DIS 13680:2026(en)
International
Standard
ISO/DIS 13680
ISO/TC 67/SC 5
Oil and gas industries including
Secretariat: JISC
lower carbon energy — Corrosion-
Voting begins on:
resistant alloy seamless products
for use as casing, tubing, coupling
Voting terminates on:
stock and accessory material —
Technical delivery conditions
Industries du pétrole et du gaz, y compris les énergies à faible
teneur en carbone — Produits sans soudure en acier allié
résistant à la corrosion utilisés comme tubes de cuvelage, tubes
de production, tubes-ébauches pour manchons et matériau pour
accessoires — Conditions techniques de livraison
ICS: 75.180.10; 77.140.75
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 13680:2026(en)
ii
ISO/DIS 13680:2026(en)
Contents Page
Foreword .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, abbreviated terms and symbols . 4
3.1 Terms and definitions .4
3.2 Abbreviated terms .7
3.3 Symbols .8
4 General . 8
4.1 Dual normative references .8
4.2 Units of measurement .8
5 Information supplied by the purchaser . 9
6 Manufacturing process .11
6.1 Melting practices .11
6.2 Product manufacturing process .11
6.3 Pipe end sizing .11
6.4 Straightening . . 12
6.5 Processes requiring validation . 12
6.6 Traceability . 12
6.7 Manufacturing procedure qualification test . 13
6.8 Process for update of alloys and/or grades . 13
7 Material requirements .13
7.1 Chemical composition . 13
7.2 Tensile properties . 13
7.3 Hardness properties . 13
7.4 Charpy V-notch test properties — General requirements .14
7.4.1 Test temperature .14
7.4.2 Evaluation of test results .14
7.4.3 Critical thickness .14
7.4.4 Specimen size, orientation and hierarchy . .14
7.4.5 Alternative size impact test specimens . 15
7.4.6 Sub-size test specimens . 15
7.5 Charpy V-notch — Absorbed energy requirements for coupling stock and accessory
material —Group 1, cold-hardened group 2 and group 3 . 15
7.5.1 General . 15
7.5.2 Requirements for group 1, cold-hardened group 2 and group 3 . 15
7.6 Charpy V-notch — Absorbed energy requirements for pipe — Group 1, cold-hardened
group 2 and group 3 . . .16
7.7 Charpy V-notch — Absorbed energy requirements at low temperature — Group 2 .17
7.8 Flattening requirements for groups 2 and 3.17
7.9 Corrosion properties .17
7.9.1 General .17
7.9.2 Pitting corrosion properties for group 2 .18
7.10 Microstructure properties . .18
7.10.1 Group 1 .18
7.10.2 Group 2 .18
7.10.3 Group 3 .18
7.11 Surface condition .18
7.12 Defects .19
7.12.1 Pipe .19
7.12.2 Coupling stock and accessory material .19
7.12.3 Process control plan .19
8 Dimensions, masses and tolerances . . 19

iii
ISO/DIS 13680:2026(en)
8.1 Outside diameter, wall thickness and mass.19
8.2 Length . 20
8.3 Tolerances . 20
8.3.1 Tolerance on outside diameter, wall thickness and mass . 20
8.3.2 Straightness . 20
8.3.3 Drift requirements . 20
8.4 Product ends . 20
9 Inspection and testing .21
9.1 Test equipment .21
9.2 Type and frequency of tests .21
9.3 Testing of chemical composition .21
9.3.1 Chemical analysis .21
9.3.2 Test method .21
9.3.3 Recheck of Product Analyses . 22
9.3.4 Chromium depletion test — Groups 2 and 3 . 22
9.4 Testing of mechanical characteristics . 22
9.4.1 Test lot . 22
9.4.2 Selection and preparation of samples and test pieces . 23
9.5 Tensile test . 23
9.5.1 Orientation and size of test pieces . 23
9.5.2 Test method . 23
9.5.3 Invalidation of test . 23
9.5.4 Retest . 23
9.6 Hardness test . 23
9.6.1 Test pieces . 23
9.6.2 Test method .24
9.6.3 Invalidation of tests . 25
9.6.4 Periodic checks of hardness-testing machines . 25
9.6.5 Verification of hardness-testing machines and indenters . 25
9.6.6 Retests . 26
9.7 Impact test . 26
9.7.1 Test pieces . 26
9.7.2 Frequency of testing.27
9.7.3 Impact test method .27
9.7.4 Impact test retest . 28
9.7.5 Invalidation of tests . 28
9.8 Flattening test for groups 2 and 3 . 28
9.8.1 Test pieces . 28
9.8.2 Frequency of testing. 28
9.8.3 Flattening test method . 28
9.8.4 Flattening test retest . 28
9.8.5 Invalidation of tests . 29
9.9 Pitting corrosion test for group 2 . 29
9.10 Microstructural examination . 29
9.10.1 Test pieces . 29
9.10.2 Test method . 30
9.10.3 Retest . 30
9.11 Dimensional testing . 30
9.11.1 General . 30
9.11.2 Outside diameter .31
9.11.3 Wall thickness at end of products .31
9.11.4 Wall thickness of product body .31
9.12 Drift test .32
9.12.1 Non-upset and external upset pipe .32
9.12.2 Internal upset pipe .32
9.12.3 Drift mandrel coating .32
9.13 Length .32
9.14 Straightness .32

iv
ISO/DIS 13680:2026(en)
9.15 Mass determination . 33
9.16 Visual inspection . 33
9.16.1 General . 33
9.16.2 Pipe body, coupling stock and accessory material . 34
9.16.3 Pipe ends . 34
9.16.4 Disposition . 34
9.17 Non-destructive examination . 34
9.17.1 General . 34
9.17.2 NDE personnel . 35
9.17.3 Products . 35
9.17.4 Pup joints . 35
9.17.5 Untested ends . . 35
9.17.6 Upset ends . 35
9.17.7 Reference standards . 36
9.17.8 NDE system capability records . 36
9.17.9 All product group 1 .37
9.17.10 Full-body NDE of product — Groups 2 and 3 .37
9.17.11 Pipe, coupling stock and accessory material requiring further evaluation .37
9.17.12 Evaluation of indications (prove-up) .37
9.17.13 Disposition of pipe containing defects . . 38
9.17.14 Disposition of coupling stock and accessory material containing defects . 39
9.18 Positive material identification . 39
10 Surface treatment .40
10.1 Group 1 . 40
10.2 Groups 2 and 3 . 40
11 Marking . . 41
11.1 General .41
11.2 Colour-code identification .41
11.3 Marking content and sequence .41
12 Surface protection — Group 1 .42
13 Documents .42
13.1 Electronic media .42
13.2 Retention of records .42
13.3 Test certificates . .43
14 Handling, packaging and storage .44
14.1 General . 44
14.2 Handling . 44
14.3 Packaging . 44
14.3.1 General . 44
14.3.2 Identification . 44
14.4 Storage . 44
15 Minimum Facility Requirements for Manufacturers .45
15.1 Pipe mill .45
15.2 Bar mill .45
15.3 Processor .45
15.4 Coupling or Pup-joint Manufacturer .45
15.5 Subcontractor .45
Annex A (normative) Tables in SI units.46
Annex B (normative) Figures in SI (USC) units .70
Annex C (normative) Tables in USC units . .75
Annex D (normative) Purchaser inspection .98
Annex E (normative) Cleanliness requirements .99
Annex F (normative) Bar product .101

v
ISO/DIS 13680:2026(en)
Annex G (normative) Product specification level 2 (PSL-2) .117
Annex H (normative) Standardized manufacturing procedure qualification test .119
Annex I (informative) Photographic examples of microstructures, groups 1, 2 and 3 . 124
Annex J (normative) Provisions for Threading and Applying Couplings .130
Annex K (informative) Procedures Used to Convert from SI Units to USC Units.133
Bibliography .137

vi
ISO/DIS 13680:2026(en)
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,
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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 67, Oil and gas industries including lower carbon
energy, Subcommittee SC 5, Casing, tubing and drill pipe.
This sixth edition cancels and replaces the fifth edition (ISO 13680:2024), which has been technically
revised.
The main changes are as follows:
— addition of Annex J on provisions for threading and applying couplings
— addition of Annex K on procedures used to convert from SI units to USC units
— consolidation of former groups 3 and 4 into a unique group 3
— removal of 13-1-0 category and 13-5-2 grade 80; addition of 27-34-4 category; addition of 13-5-2 grade
110 PSL-2
— clarification of stress-relieving and drift requirements
— clarification of straightening, MPQT requirements, lot size, surface hardness testing and PMI for bars
— addition of mandatory Charpy V-Notch at −46 °C (−50 °F) and pitting corrosion testing for group 2
— addition of retest provision on hardness variation
— addition of semi-automated or automated methods for diameter and straightness measurement,
clarification of capability records for Automatic Machine vision system
— addition of minimum facility requirements for manufacturers
— addition of chemical composition ranges for PSL-1 tubular product
— review of microscopic cleanliness requirements and acceptance limits
— improvement of Annex H, including addition of anisotropy characterization testing

vii
ISO/DIS 13680:2026(en)
— addition of photographic examples for group 1 in Annex I.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

viii
DRAFT International Standard ISO/DIS 13680:2026(en)
Oil and gas industries including lower carbon energy —
Corrosion-resistant alloy seamless products for use as casing,
tubing, coupling stock and accessory material — Technical
delivery conditions
WARNING — It is the purchaser's responsibility to specify the product specification level (PSL),
corrosion-resistant alloy (CRA) group, category, grade, delivery conditions and any other requirement
in addition to those specified herewith to ensure that the product is adequate for the intended
service environment. The NACE MR0175/ISO 15156 series should be applied when making specific
requirements for H S-containing environments; see Annex G. It is the product user's responsibility
to ensure that the product is suitable for the intended application with respect to all environmental
degradation threats during both normal operation and system upsets. Not all PSL-1 categories and
grades can be made cracking resistant in accordance with the NACE MR0175/ISO 15156 series and
are, therefore, not included in PSL-2.
1 Scope
This document specifies the technical delivery conditions for corrosion-resistant alloy seamless products
for casing, tubing, coupling stock and accessory material (including coupling stock and accessory material
from bar) for two product specification levels:
— PSL-1, which is the basis of this document;
— PSL-2, which provides additional requirements for a product that is intended to be both corrosion and
cracking resistant for the environments and qualification method specified in Annex G and in the NACE
MR0175/ISO 15156 series.
This document contains no provisions relating to the connection of individual lengths of pipe, except what is
included in Annex J. Demonstration of conformance to NACE MR0175/ISO 15156 series of material affected
by end sizing, connection manufacture or welding operations is outside the scope of this document.
This document is applicable to the following four groups of products:
a) group 1, which is composed of stainless alloys with a martensi
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