ISO/PAS 16846:2025

Oil and gas industries including lower carbon energy — Thermoplastics lined tubing for wells

This document specifies requirements for downhole thermoplastics lined tubing (TLT) used in the oil and gas industries, including configuration, materials, manufacturing, inspection and testing, documentation, marking, packaging, transportation, storage and use. This document is applicable to downhole thermoplastics lined tubing (TLT) used in contact with media related to oil and gas exploration and production (which involves multiphase flow, as well as water injection). This document is suitable for thermoplastics including but not limited to polyethylene (PE), polyethylene of raised temperature resistance (PE-RT), ultra-high molecular weight polyethylene (PE-UHMW), crosslinked polyethylene (PE-X), polypropylene (PP), unplasticized polyamide (PA-U), polyketone (PK), polyphenylene sulfide (PPS), polyvinylidene fluoride (PVDF), and polyetheretherketone (PEEK) which meet the requirements of relevant design specifications, standards or regulations.

Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone — Tubes à revêtement thermoplastique pour les puits

General Information

• Status: Published
• Publication Date: 03-Jul-2025
• ICS: 75.180.10 - Exploratory, drilling and extraction equipment
• Technical Committee: ISO/TC 67/SC 5 - Casing, tubing and drill pipe
• Drafting Committee: ISO/TC 67/SC 5 - Casing, tubing and drill pipe
• Current Stage: 6060 - International Standard published
• Start Date: 04-Jul-2025
• Due Date: 05-Jul-2025
• Completion Date: 04-Jul-2025

Standards Content (Sample)

Publicly
Available
Specification
ISO/PAS 16846
First edition
Oil and gas industries including
2025-07
lower carbon energy —
Thermoplastics lined tubing for wells
Industries du pétrole et du gaz, y compris les énergies à faible
teneur en carbone — Tubes à revêtement thermoplastique pour
les puits
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 2
3.1 Terms and definitions .2
3.2 Symbols and abbreviated terms .4
3.2.1 Symbols.4
3.2.2 Abbreviated terms .4
4 TLT configuration . 5
4.1 Configuration .5
4.2 Pipe ends .5
4.3 Connection type .5
5 Materials requirements . 7
5.1 Backing pipe .7
5.2 Liner .7
5.3 CB ring .7
5.4 Coated coupling.8
6 Manufacturing . 8
6.1 Selection of backing pipe .8
6.1.1 New tubing serves as the backing pipe .8
6.1.2 Used tubing serves as the backing pipe .8
6.2 Threading .8
6.3 Lining .8
6.3.1 Mechanical fit lining .8
6.3.2 Cement backed lining .9
6.4 Manufacture of CB ring and installation of couplings .9
6.4.1 Manufacture of CB ring.9
6.4.2 Installation of couplings .9
6.5 Traceability .9
6.6 Purchaser inspection .9
7 Inspection and testing .10
7.1 Inspection of backing pipe .10
7.2 Inspection of liner .10
7.2.1 Surface quality .10
7.2.2 Dimensions .10
7.2.3 Performance .10
7.3 Inspection of TLT .10
7.3.1 Length measurement .10
7.3.2 Thread gauging and inspection .11
7.3.3 Straightness evaluation.11
7.3.4 Drift test . 12
7.3.5 Hydrostatic test . 12
7.3.6 Bonding strength test . 12
7.3.7 Connection test . 12
7.3.8 Rapid decompression test . 13
7.3.9 Combined loading test . 13
7.4 CB ring test . 13
7.5 Inspection frequency and acceptance criteria . 13
7.5.1 Lot . 13
7.5.2 Inspection frequency . . 13
7.5.3 Batch release test .14
7.5.4 Type test .14
7.5.5 Acceptance criteria . 15

iii
8 Documentation .15
8.1 Documents provided by the purchaser . 15
8.2 Documents provided by the manufacturer . 15
9 Marking, packaging, transportation and storage .16
9.1 Marking .16
9.2 Packaging .16
9.3 Transportation .16
9.4 Storage .16
10 Use . 17
Annex A (informative) Maximum operating temperatures and characteristics of typical
thermoplastics .18
Annex B (informative) Test method for gas permeability of polymer materials .30
Annex C (informative) Test method for bonding strength of TLT .32
Annex D (informative) Use of TLT .34
Bibliography .
...

FINAL DRAFT
Publicly
Available
Specification
ISO/DPAS 16846
ISO/TC 67/SC 5
Oil and gas industries including
Secretariat: JISC
lower carbon energy —
Voting begins on:
Thermoplastics lined tubing for
2025-03-25
wells
Voting terminates on:
2025-05-20
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/DPAS 16846:2025(en) © ISO 2025

FINAL DRAFT
ISO/DPAS 16846:2025(en)
Publicly
Available
Specification
ISO/DPAS 16846
ISO/TC 67/SC 5
Oil and gas industries including
Secretariat: JISC
lower carbon energy —
Voting begins on:
Thermoplastics lined tubing for wells
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DPAS 16846:2025(en) © ISO 2025

ii
ISO/DPAS 16846:2025(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 2
3.1 Terms and definitions .2
3.2 Symbols and abbreviated terms .4
3.2.1 Symbols.4
3.2.2 Abbreviated terms .4
4 TLT configuration . 5
4.1 Configuration .5
4.2 Pipe ends .5
4.3 Connection type .5
5 Materials requirements . 7
5.1 Backing pipe .7
5.2 Liner .7
5.3 CB ring .7
5.4 Coated coupling.8
6 Manufacturing . 8
6.1 Selection of backing pipe .8
6.1.1 New tubing serves as the backing pipe .8
6.1.2 Used tubing serves as the backing pipe .8
6.2 Threading .8
6.3 Lining .8
6.3.1 Mechanical fit lining .8
6.3.2 Cement backed lining .9
6.4 Manufacture of CB ring and installation of couplings .9
6.4.1 Manufacture of CB ring.9
6.4.2 Installation of couplings .9
6.5 Traceability .9
6.6 Purchaser inspection .9
7 Inspection and testing .10
7.1 Inspection of backing pipe .10
7.2 Inspection of liner .10
7.2.1 Surface quality .10
7.2.2 Dimensions .10
7.2.3 Performance .10
7.3 Inspection of TLT .10
7.3.1 Length measurement .10
7.3.2 Thread inspection .11
7.3.3 Straightness evaluation.11
7.3.4 Drift test . 12
7.3.5 Hydrostatic test . 12
7.3.6 Bonding strength test . 12
7.3.7 Connection test . 12
7.3.8 Rapid decompression test . 13
7.3.9 Combined loading test . 13
7.4 CB ring test . 13
7.5 Inspection frequency and acceptance criteria . 13
7.5.1 Lot . 13
7.5.2 Inspection frequency . . 13
7.5.3 Batch release test .14
7.5.4 Type test .14
7.5.5 Acceptance criteria . 15

iii
ISO/DPAS 16846:2025(en)
8 Documentation .15
8.1 Documents provided by the purchaser . 15
8.2 Documents provided by the manufacturer . 15
9 Marking, packaging, transportation and storage .16
9.1 Marking .16
9.2 Packaging .16
9.3 Transportation .16
9.4 Storage .
...

ISO/DPAS 16846(E)
TC ISO/DPAS 16846
ISO/TC 67/SC 5
Secretariat: JISC
Date: 2025-01-1003-11
ISO/DPAS 16846(E)
Oil and gas industries including lower carbon energy —
Thermoplastics lined tubing for wells

ISO/DPAS 16846(E)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical,
including photocopying, or posting on the internet or an intranet, without prior written permission. Permission
can be requested from either ISO at the address below or ISO'sISO’s member body in the country of the requester.
ISO Copyright Office copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
ISO/DPAS 16846(E)
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Symbols and abbreviated terms . 5
4 TLT configuration . 6
4.1 Configuration . 6
4.2 Pipe ends . 7
4.3 Connection type . 7
5 Materials requirements . 9
5.1 Backing pipe . 9
5.2 Liner . 9
5.3 CB ring. 10
5.4 Coated coupling . 10
6 Manufacturing . 10
6.1 Selection of backing pipe . 10
6.2 Threading . 11
6.3 Lining . 11
6.4 Manufacture of CB ring and installation of couplings . 11
6.5 Traceability . 12
6.6 Purchaser inspection . 12
7 Inspection and testing . 12
7.1 Inspection of backing pipe . 12
7.2 Inspection of liner . 12
7.3 Inspection of TLT . 13
7.4 CB ring test . 17
7.5 Inspection frequency and acceptance criteria . 17
8 Documentation . 19
8.1 Documents provided by the purchaser . 19
8.2 Documents provided by the manufacturer . 19
9 Marking, packaging, transportation and storage . 19
9.1 Marking . 19
9.2 Packaging . 20
9.3 Transportation . 20
9.4 Storage . 20
10 Use . 21
Annex A (informative) Maximum operating temperatures and characteristics of typical
thermoplastics . 22
Annex B (informative) Test method for bonding strength of TLT . 35
Annex C (informative) Test method for gas permeability of polymer materials . 38
Annex D (informative) Use of TLT . 40
Bibliography . 41

ISO/DPAS 16846(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.
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 documentsdocument 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).
Attention is drawnISO draws attention to the possibility that some of the elementsimplementation of
this document may beinvolve the subjectuse 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. Details of any patent rights
identified during the development of the document will be in the Introduction and/or on the ISO list
of patent declarations received (see ).
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, Materials, equipmentOil and offshore
structures for petroleum, petrochemical and natural gas industries including lower carbon energy,
Subcommittee SC 5, Casing, tubing, and drill pipe.
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.htmlwww.iso.org/members.html.

ISO/DPAS 16846(E:(en)
Introduction
Users of this document should be aware that further or differing requirements can be needed for individual
applications. This document is not intended to inhibit a manufacturer from offering, or the purchaser from
accepting, alternative equipment or engineering solutions for the individual application. This can be
particularly applicable where there is an innovative or developing technology. Where an alternative is offered,
it is the responsibility of the manufacturer to identify and provide details of any variations from this document.
In this document, the following verbal forms are used:
— “shall” indicates a requirement;
— “should” indicates a recommendation;
— “can” indicates a possibility or a capability;
— “may” indicates a permission.
v
ISO/WD PAS 16846(E)
Oil and gas industries including lower carbon energy —
Thermoplastics lined tubing for wells
1 Scope
This document specifies requirements for downhole thermoplastics lined tubing (TLT) used in the
petroleumoil and natural gas industries , including configuration, materials, manufacturing, inspection and
testing, documentation, marking, packaging, transportation, storage, and use.
This document is applicable to downhole thermoplastics lined tubing (TLT) used in contact with media related
to oil and gas exploration and production (which involves multiphase flow, as well as water injection).
This document is suitable for thermoplastics including but not limited to polyethylene (PE), polyethylene of
raised temperature resistance (PE-RT), ultra-high molecular weight polyethylene (PE-UHMW), crosslinked
polyethylene (PE-X), polypropylene (PP), unplasticized polyamide (PA-U), polyketone (PK), polyphenylene
sulfide (PPS), polyvinylidene fluoride (PVDF), and polyetheretherketone (PEEK) which meet the requirements
of relevant design specifications, standards, or regulations.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
the requirements of this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 472:2013, Plastics — Vocabulary
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance
quality limit (AQL) for lot-by-lot inspection
ISO 10405:2000, Petroleum and natural gas industries — Care and use of casing and tubing
ISO 10893-3, Non-destructive testing of steel tubes — Part 3: Automated full peripheral flux leakage testing of
seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection of longitudinal
and/or transverse imperfections
ISO 11295:2022, Classification and information on design and applications of plastics piping systems used for
renovation and replacement
ISO ISO 11960:2020, Petroleum and natural gas industries — Steel pipes for use as casing or tubing for wells
ISO 13678, Petroleum and natural gas industries — Evaluation and testing of thread compounds for use with
casing, tubing, line pipe and drill stem elements
ISO 13679, Petroleum and natural gas industries — Procedures for testing casing and tubing connections
ISO 15105-1:2007, Plastics — Film and sheeting — Determination of gas-transmission rate — Part 1:
Differential-pressure methods
ISO ISO 15156-2, Petroleum and natural gas industries — Materials for use in H2S-containing environments in
oil and gas production — Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons
ISO 15527, Plastics — Compression-moulded sheets of polyethylene (PE-UHMW, PE-HD) — Requirements and
test methods
ISO/DPAS 16846(E:(en)
ISO 23936-1:2022, Petroleum, petrochemical and natural gas industries — Non-metallic materials in contact
with media related to oil and gas production — Part 1: Thermoplastics
ISO/PAS 24565:2022, Petroleum and natural gas industries — Ceramic lined tubing
CEN/TS 14541:2013, Plastics pipes and fittings —Characteristics for utilization of non-virgin PVC-U, PP and PE
materials
API RP 5B1, Gauging and Inspection of Casing, Tubing and Pipe Line Threads
API Spec 5B, Specification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe
Threads
API Spec 15S:2020, Spoolable Reinforced Plastic Line Pipe
API 17 TR-2, The Ageing of Offshore Polyamides PA 11 and PA 12 in Flexible Pipes
ASTM A700, Standard Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
3 Terms, definitions, symbols and abbreviate
...