ISO 17885:2021
(Main)Plastics piping systems — Mechanical fittings for pressure piping systems — Specifications
Plastics piping systems — Mechanical fittings for pressure piping systems — Specifications
This document specifies the requirements and test methods for mechanical fittings intended to join plastic pressure piping systems including transition fittings to metal pipes for the following: — supply of gaseous fuels (GAS); — supply of water for human consumption (W), including raw water prior to treatment and for the supply of water for general purposes, as well as underground drainage and sewerage under pressure (P); — supply of water for irrigation (I); — industrial applications (IS). This document is applicable only to mechanical fittings with operating-temperature and pressure limits as indicated in the relevant systems standards. NOTE A list of International Standards for plastic pipes for which mechanical fittings can be used can be found in Annex A. Flanges are not covered by this document. Mechanical fittings for hot and cold water systems inside buildings, as well as for district heating applications, are not covered by this document.
Systèmes de canalisations en plastiques — Raccords mécaniques pour les canalisations sous pression — Spécifications
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INTERNATIONAL ISO
STANDARD 17885
Second edition
2021-06
Plastics piping systems — Mechanical
fittings for pressure piping systems —
Specifications
Systèmes de canalisations en plastiques — Raccords mécaniques pour
les canalisations sous pression — Spécifications
Reference number
©
ISO 2021
© ISO 2021
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 3
3.1 Terms and definitions . 3
3.2 Symbols and abbreviated terms. 5
3.2.1 Materials . 5
3.2.2 Applications . 6
4 Manufacturers' declaration for the field of application . 6
5 Material . 6
5.1 General . 6
5.2 Plastic materials . 7
5.3 Metals . 8
5.4 Elastomers . 9
5.5 Lubricants and/or greases .10
6 General characteristics .10
6.1 Appearance .10
6.2 Colour .10
6.3 Weathering protection .10
6.4 Threads .10
6.5 Transition fittings to metal pipes .10
6.6 Combined fittings .11
6.7 Twisting . .11
7 Geometrical characteristics .11
8 Physical characteristics .11
8.1 Evaluation of the MRS value of the plastic material .11
8.2 Verification of long-term behaviour of the plastic material .11
8.3 Specific material related characteristics of fitting materials .12
8.4 Application-related characteristics .12
8.4.1 Effect on water quality (W) .12
8.4.2 Resistance to gas constituents (GAS) .12
8.4.3 Chemical resistance of fittings for industrial applications (IS) .13
9 Performance requirements .13
9.1 General .13
9.2 Pressure resistance of the fitting body .14
9.2.1 Preparation of test piece .14
9.2.2 Testing of pressure resistance .14
9.3 Fitting assemblies .14
9.3.1 Preparation of test assemblies .14
9.3.2 Test scheme .14
9.3.3 Requirements .16
10 Marking .25
11 Packaging .25
Annex A (informative) List of standards .26
Annex B (normative) Stiffener requirements .27
Annex C (normative) Test pressure of materials and fitting bodies .28
Annex D (normative) Physical characteristics of fitting materials .30
Annex E (normative) Resistance to gas constituents .34
Annex F (normative) Test stresses .35
Annex G (normative) Cyclic test procedure .37
Bibliography .38
iv © ISO 2021 – All rights reserved
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 documents 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 drawn to the possibility that some of the elements of this document may be the subject of
patent rights. 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 www .iso .org/ patents).
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 138, Plastics pipes, fittings and valves for
the transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.
This second edition cancels and replaces the first edition (ISO 17885:2015), which has been technically
revised. It also incorporates the Amendment ISO 17885:2015/Amd 1:2016.
The main changes compared to the previous edition are as follows:
— a clarification for the relation between the nominal pressure and the MOP declared by the
manufacturer is given;
— the term ‘weathering’ is used instead of ‘ultraviolet radiation’, to be in line with PE pipe standards;
— a clarification that the own reprocessable material of glass reinforced materials with a fibre length
up to 3 mm may be used;
— the diameter for various pipe materials for the ‘Resistance of plastic pipe/pipe or pipe/fitting
assemblies to tensile loading at 23 °C has been increased from 63 mm to 250 mm;
— unplasticized polyamide (PA-U) is included in Table 7;
— errors in Table D.1 regarding the viscosity number of unplasticized polyamide (PA-U) are resolved;
— the requirement for the melt mass flow rate for PB in Table D.1 is aligned with ISO 15494;
— the requirement for the depth of dezincification for Cu in Table D.1 is aligned with EN 1254-3, -6 and
-8;
— Formulae (1) and (2) and Annex C are corrected;
— the test pressures for unplasticized polyamide (PA-U) in Table F.1 are increased;
— the test procedure in Annex G is clarified.
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 foun
...
INTERNATIONAL ISO
STANDARD 17885
Second edition
2021-06
Corrected version
2021-12
Plastics piping systems — Mechanical
fittings for pressure piping systems —
Specifications
Systèmes de canalisations en plastiques — Raccords mécaniques pour
les canalisations sous pression — Spécifications
Reference number
© ISO 2021
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 3
3.1 Terms and definitions . 3
3.2 Symbols and abbreviated terms . 5
3.2.1 Materials . 5
3.2.2 Applications . 6
4 Manufacturers' declaration for the field of application . 6
5 Material. 6
5.1 General . 6
5.2 Plastic materials . 7
5.3 Metals . 8
5.4 Elastomers . 9
5.5 Lubricants and/or greases . 10
6 General characteristics .10
6.1 Appearance . 10
6.2 Colour . 10
6.3 Weathering protection . 10
6.4 Threads . 10
6.5 Transition fittings to metal pipes . 10
6.6 Combined fittings . 11
6.7 Twisting . 11
7 Geometrical characteristics .11
8 Physical characteristics .11
8.1 Evaluation of the MRS value of the plastic material . 11
8.2 Verification of long-term behaviour of the plastic material . 11
8.3 Specific material related characteristics of fitting materials . . 11
8.4 Application-related characteristics .12
8.4.1 Effect on water quality (W).12
8.4.2 Resistance to gas constituents (GAS) .12
8.4.3 Chemical resistance of fittings for industrial applications (IS) .13
9 Performance requirements . .13
9.1 General .13
9.2 Pressure resistance of the fitting body . 13
9.2.1 Preparation of test piece . 13
9.2.2 Testing of pressure resistance . 14
9.3 Fitting assemblies . 14
9.3.1 Preparation of test assemblies . 14
9.3.2 Test scheme . 14
9.3.3 Requirements . 16
10 Marking . .25
11 Packaging.25
Annex A (informative) List of standards .26
Annex B (normative) Stiffener requirements .27
Annex C (normative) Test stress of materials and fitting bodies.28
Annex D (normative) Physical characteristics of fitting materials .30
iii
Annex E (normative) Resistance to gas constituents .34
Annex F (normative) Test stresses .35
Annex G (normative) Cyclic test procedure . .37
Bibliography .38
iv
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 documents 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 drawn to the possibility that some of the elements of this document may be the subject of
patent rights. 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 www.iso.org/patents).
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 138, Plastics pipes, fittings and valves for
the transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.
This second edition cancels and replaces the first edition (ISO 17885:2015), which has been technically
revised. It also incorporates the Amendment ISO 17885:2015/Amd 1:2016.
The main changes compared to the previous edition are as follows:
— a clarification for the relation between the nominal pressure and the MOP declared by the
manufacturer is given;
— the term ‘weathering’ is used instead of ‘ultraviolet radiation’, to be in line with PE pipe standards;
— a clarification that the own reprocessable material of glass reinforced materials with a fibre length
up to 3 mm may be used;
— the diameter for various pipe materials for the ‘Resistance of plastic pipe/pipe or pipe/fitting
assemblies to tensile loading at 23 °C has been increased from 63 mm to 250 mm;
— unplasticized polyamide (PA-U) is included in Table 7;
— errors in Table D.1 regarding the viscosity number of unplasticized polyamide (PA-U) are resolved;
— the requirement for the melt mass flow rate for PB in Table D.1 is aligned with ISO 15494;
— the requirement for the depth of dezincification for Cu in Table D.1 is aligned with EN 1254-3, -6 and
-8;
— Formulae (1) and (2) and Annex C are corrected;
— the test pressures for unplasticized polyamide (PA-U) in Table F.1 are increased;
— the test procedure in Annex G is clarified.
v
This corrected version of ISO 17885:2021 incorporates the following corrections:
— original Formula (1) from ISO 17885:2021 has been deleted and
...
INTERNATIONAL ISO
STANDARD 17885
Second edition
2021-06
Corrected version
2021-12
Plastics piping systems — Mechanical
fittings for pressure piping systems —
Specifications
Systèmes de canalisations en plastiques — Raccords mécaniques pour
les canalisations sous pression — Spécifications
Reference number
© ISO 2021
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 3
3.1 Terms and definitions . 3
3.2 Symbols and abbreviated terms . 5
3.2.1 Materials . 5
3.2.2 Applications . 6
4 Manufacturers' declaration for the field of application . 6
5 Material. 6
5.1 General . 6
5.2 Plastic materials . 7
5.3 Metals . 8
5.4 Elastomers . 9
5.5 Lubricants and/or greases . 10
6 General characteristics .10
6.1 Appearance . 10
6.2 Colour . 10
6.3 Weathering protection . 10
6.4 Threads . 10
6.5 Transition fittings to metal pipes . 10
6.6 Combined fittings . 11
6.7 Twisting . 11
7 Geometrical characteristics .11
8 Physical characteristics .11
8.1 Evaluation of the MRS value of the plastic material . 11
8.2 Verification of long-term behaviour of the plastic material . 11
8.3 Specific material related characteristics of fitting materials . . 11
8.4 Application-related characteristics .12
8.4.1 Effect on water quality (W).12
8.4.2 Resistance to gas constituents (GAS) .12
8.4.3 Chemical resistance of fittings for industrial applications (IS) .13
9 Performance requirements . .13
9.1 General .13
9.2 Pressure resistance of the fitting body . 13
9.2.1 Preparation of test piece . 13
9.2.2 Testing of pressure resistance . 14
9.3 Fitting assemblies . 14
9.3.1 Preparation of test assemblies . 14
9.3.2 Test scheme . 14
9.3.3 Requirements . 16
10 Marking . .25
11 Packaging.25
Annex A (informative) List of standards .26
Annex B (normative) Stiffener requirements .27
Annex C (normative) Test stress of materials and fitting bodies.28
Annex D (normative) Physical characteristics of fitting materials .30
iii
Annex E (normative) Resistance to gas constituents .34
Annex F (normative) Test stresses .35
Annex G (normative) Cyclic test procedure . .37
Bibliography .38
iv
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 documents 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 drawn to the possibility that some of the elements of this document may be the subject of
patent rights. 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 www.iso.org/patents).
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 138, Plastics pipes, fittings and valves for
the transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.
This second edition cancels and replaces the first edition (ISO 17885:2015), which has been technically
revised. It also incorporates the Amendment ISO 17885:2015/Amd 1:2016.
The main changes compared to the previous edition are as follows:
— a clarification for the relation between the nominal pressure and the MOP declared by the
manufacturer is given;
— the term ‘weathering’ is used instead of ‘ultraviolet radiation’, to be in line with PE pipe standards;
— a clarification that the own reprocessable material of glass reinforced materials with a fibre length
up to 3 mm may be used;
— the diameter for various pipe materials for the ‘Resistance of plastic pipe/pipe or pipe/fitting
assemblies to tensile loading at 23 °C has been increased from 63 mm to 250 mm;
— unplasticized polyamide (PA-U) is included in Table 7;
— errors in Table D.1 regarding the viscosity number of unplasticized polyamide (PA-U) are resolved;
— the requirement for the melt mass flow rate for PB in Table D.1 is aligned with ISO 15494;
— the requirement for the depth of dezincification for Cu in Table D.1 is aligned with EN 1254-3, -6 and
-8;
— Formulae (1) and (2) and Annex C are corrected;
— the test pressures for unplasticized polyamide (PA-U) in Table F.1 are increased;
— the test procedure in Annex G is clarified.
v
This corrected version of ISO 17885:2021 incorporates the following corrections:
— original Formula (1) from ISO 17885:2021 has been deleted and
...
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