ISO 21036:2025
(Main)Plastics piping systems for industrial applications — Unplasticized polyamide (PA-U) — Metric series for specifications for components and system
Plastics piping systems for industrial applications — Unplasticized polyamide (PA-U) — Metric series for specifications for components and system
This document specifies the characteristics and requirements for a piping system and its components, made from unplasticized polyamide (PA-U) intended to be used for thermoplastics piping systems in industrial applications above and below ground. NOTE 1 Requirements applying to industrial valves are given in this document and in other standards. This document is applicable to PA-U pipes, fittings, valves and their joints, and to joints with components of other plastics and non-plastic materials, depending on their suitability, intended to be used for the conveyance of liquid and gaseous fluids as well as solid matter in fluids for industrial applications such as the following: — transport of oil, gaseous fuels and multiphase mixtures (exploration and production; general purpose hydrocarbon-based fluids); — transport of renewable gases (hydrogen, biomethane); — transport of contaminated sewer (e.g. contaminated with hydrocarbons); — transport of CO2 [carbon capture and utilisation or storage (CCUS)]. NOTE 2 National regulations can apply. NOTE 3 Other application areas are possible if the requirements of this document and/or applicable national requirements are fulfilled. Characteristics and requirements which are applicable for PA-U are covered by the relevant clauses of this document. Those characteristics and requirements which are dependent on the material are given in the relevant normative Annex A.
Systèmes de canalisations en matières plastiques pour les applications industrielles — Polyamide non plastifié (PA-U) — Séries métriques pour les spécifications pour les composants et le système
General Information
Standards Content (Sample)
International
Standard
ISO 21036
First edition
Plastics piping systems for
2025-01
industrial applications —
Unplasticized polyamide (PA-U) —
Metric series for specifications for
components and system
Systèmes de canalisations en matières plastiques pour les
applications industrielles — Polyamide non plastifié (PA-U) —
Séries métriques pour les spécifications pour les composants et le
système
Reference number
© ISO 2025
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ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
3.1 Geometrical definitions .3
3.2 Material definitions .4
3.3 Definitions related to material characteristics .4
3.4 Definitions related to service conditions .5
4 Symbols and abbreviated terms. 6
4.1 Symbols .6
4.2 Abbreviated terms .7
5 Material. 7
5.1 General .7
5.2 Long-term hydrostatic strength properties.7
5.3 Material characteristics .7
5.4 Virgin, reworkable and recyclable material .8
5.5 Materials for components not made from PA-U .8
5.5.1 General .8
5.5.2 Metallic materials .8
5.5.3 Sealing materials .8
5.5.4 Other materials .8
6 General characteristics . 8
6.1 Appearance .8
6.2 Colour .8
6.3 Influence of UV radiation .9
6.4 Conditioning or saturation of pipe-based test specimens .9
7 Geometrical characteristics . 9
7.1 General .9
7.2 Mean outside diameters, out-of-roundness (ovality), and tolerances .9
7.3 Wall thicknesses and related tolerances .9
7.4 Angles .9
7.5 Laying lengths .10
7.6 Threads .10
7.7 Mechanical fittings .10
7.8 Joint dimensions of valves .10
8 Mechanical characteristics .10
8.1 Resistance to internal pressure of components .10
8.2 Calculation of the test pressure for components .10
8.2.1 Pipes .10
8.2.2 Fittings .10
8.2.3 Valves .11
8.2.4 Resistance to rapid crack propagation (RCP) .11
9 Physical characteristics .11
10 Chemical characteristics .11
10.1 Effects on the component material(s) .11
10.2 Effects on the fluids .11
11 Electrical characteristics .11
12 Performance requirements . .12
12.1 General . 12
iii
12.2 Fusion compatibility . 12
13 Components performance .12
14 Classification of components .12
15 Design and installation .12
16 Declaration of conformity .12
17 Marking . .13
17.1 General . 13
17.2 Minimum required marking of pipes . 13
17.3 Minimum required marking of fittings . 13
17.4 Minimum required marking of valves .14
Annex A (normative) Industrial piping systems made from unplasticized polyamide (PA-U) .15
Annex B (informative) Design and installation .32
Bibliography .33
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 Ele
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