ISO 4982:2023

INTERNATIONAL ISO
STANDARD 4982
First edition
2023-06
Plastics piping systems for non-
pressure underground conveyance
and storage of non-potable water —
Arch-shaped, corrugated wall
chambers made of PE or PP used
for retention, detention, storage
and transportation of storm water
systems — Product specifications and
performance criteria
Systèmes de canalisations en plastique pour le transport et le
stockage souterrains sans pression de l'eau non potable — Chambres
en forme d'arche en PE ou PP, à parois annelées, utilisées pour les
systèmes de transport, de stockage et de rétention des eaux pluviales
— Spécifications des produits et critères de performance
Reference number
ISO 4982:2023(E)
© ISO 2023

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ISO 4982:2023(E)
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© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
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ISO 4982:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 General terms . 2
3.2 Material terms . 3
3.3 Mechanical terms . 3
4 Symbols and abbreviated terms.4
4.1 Symbols . 4
4.2 Abbreviated terms . 4
5 Material. 5
5.1 General . 5
5.2 Polyethylene (PE) material. 5
5.2.1 General . 5
5.2.2 Polyethylene (PE) virgin material . 5
5.2.3 Polyethylene (PE) modified with minerals . 5
5.2.4 Polyethylene (PE) non-virgin material . . 6
5.3 Polypropylene (PP) material . 6
5.3.1 General . 6
5.3.2 Polypropylene (PP) virgin material . 6
5.3.3 Polypropylene (PP) modified with minerals . 6
5.3.4 Polypropylene (PP) non-virgin material . 6
5.4 Chamber and end cap material characteristics . 6
6 General characteristics for arch-shaped chambers and end caps .9
6.1 Appearance . 9
6.2 Colour . 9
7 Geometrical characteristics . 9
7.1 General . 9
7.2 Volume. 11
7.3 Weight . . 11
8 Physical characteristics .11
8.1 Physical characteristics of PE chambers and end caps . 11
8.2 Physical characteristics of PP chambers and end caps .12
9 Mechanical characteristics .12
10 Marking . .13
10.1 General .13
10.2 Minimum required marking . 14
10.2.1 Arch-shaped chambers . 14
10.2.2 End caps . 14
Annex A (normative) Agreed specification between the manufacturer of the arch-shaped
chambers and the supplier of the materials .15
Annex B (normative) Arch stiffness and flattening capacity test for arch-shaped chambers .17
Annex C (normative) Stiffness and flattening capacity test for end caps .20
Annex D (normative) Stub compression strength test .23
Annex E (normative) Stub creep testing under compression .27
Annex F (normative) Arched-shaped chamber volume calculation .30
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ISO 4982:2023(E)
Annex G (informative) Installation of arch-shaped chambers .33
Bibliography .36
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ISO 4982:2023(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 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 1, Plastics pipes and fittings for soil, waste and drainage (including
land drainage).
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.
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ISO 4982:2023(E)
Introduction
This document specifies systems comprised of arch-shaped, corrugated wall chambers made of PE or
PP and used for infiltration, attenuation and storage of storm water.
At the time of drafting, the drafting committee is not aware of the existence of chambers made
of unplasticized polyvinylchloride (PVC-U) materials. If unplasticized polyvinylchloride (PVC-U)
chambers are produced and become available on the market, they will be included in a future revision
of this document.
The arch-shaped, corrugated wall chambers and end caps are part of a buried structural system which
includes both the arch-shaped chamber, end caps and the surrounding backfill material. Proper design
of installed arch-shaped, corrugated wall chamber systems requires consideration of the structural
contribution from the surrounding backfill materials and conformity with installation guidelines.
Arch-shaped chambers are installed as one horizontal layer on a firm foundation and embedded with
fill around and above each individual unit.
Although differing in geometry, when properly installed, the structural behaviour of chambers is
similar to that of circular thermoplastic pipes. Guidance for structural design can be found in ASTM
[1]
F2787.
Guidance for installation can be found in Annex G.
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INTERNATIONAL STANDARD ISO 4982:2023(E)
Plastics piping systems for non-pressure underground
conveyance and storage of non-potable water — Arch-
shaped, corrugated wall chambers made of PE or PP
used for retention, detention, storage and transportation
of storm water systems — Product specifications and
performance criteria
1 Scope
This document gives the definitions and specifies the minimum requirements for injection moulded
and thermoformed thermoplastics corrugated arch-shaped chambers, including integral components,
used in underground systems for retention, detention, transportation and storage of non-potable water
(e.g. storm water) and manufactured from polyethylene (PE) or polypropylene (PP).
These chambers are intended for buried underground use in one horizontal layer, e.g. in landscape,
pedestrian or vehicular traffic areas.
In the case of retention and detention systems, the main purpose of the chambers is to retain water, for
later infiltration in the ground or for later use in non-potable applications (irrigation, cleaning, sanitary
facilities, etc.) or to detain water during a storm, transferring it in a controlled way to the public storm
water network.
Applications include commercial, residential, agricultural and highway drainage, including installation
under parking lots and roadways.
Product performance is determined by a combination of material specification, product design and
manufacturing process.
These chambers are intended to be used as elements in a modular system where the manufacturer
has provided a clearly documented method specifying how the components are assembled to create a
complete retention, detention, storage or transportation system.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes 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 179-1, Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 472, Plastics — Vocabulary
ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 580:2005, Plastics piping and ducting systems — Injection-moulded thermoplastics fittings — Methods
for visually assessing the effects of heating
ISO 604, Plastics — Determination of compressive properties
ISO 899-2, Plastics — Determination of creep behaviour — Part 2: Flexural creep by three-point loading
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ISO 4982:2023(E)
ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
ISO 1133-1, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR)
of thermoplastics — Part 1: Standard method
ISO 1167-1:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination
of the resistance to internal pressure — Part 1: General method
ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of
the resistance to internal pressure — Part 2: Preparation of pipe test pieces
ISO 1183-1, Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion
method, liquid pycnometer method and titration method
ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions
ISO 3127, Thermoplastics pipes — Determination of resistance to external blows — Round-the-clock
method
ISO 3451-1, Plastics — Determination of ash — Part 1: General methods
ISO 9967:2016, Thermoplastics pipes — Determination of creep ratio
ISO 9969, Thermoplastics pipes — Determination of ring stiffness
ISO 11357-6, Plastics — Differential scanning calorimetry (DSC) — Part 6: Determination of oxidation
induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT)
ISO/TS 28037:2010, Determination and use of straight-line calibration functions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472, ISO 1043-1 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 General terms
3.1.1
arch-shaped chamber
arch-shaped product which defines a subsurface open space when installed
Note 1 to entry: Arch-shaped chambers may have perforations, inspection ports or other features that may or
may not reduce the mechanical capacity of a chamber.
3.1.2
end cap
arch-shaped product which covers the open end of a chamber row
3.1.3
corrugation
periodic shape of arch-shaped chamber or end cap walls
Note 1 to entry: A wall profile consists of a regular pattern of alternating crests and valleys connected by webs.
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ISO 4982:2023(E)
3.1.4
system
construction consisting of a single horizontal layer of connected arch-shaped chambers and end caps
and associated with backfill material
3.1.5
detention system
system designed to reduce the peak flow from a given site by providing a temporary underground
storm water storage facility
Note 1 to entry: Also known as “attenuation”.
3.1.6
retention system
system designed to provide a temporary underground storage facility from which storm water
infiltrates into the surrounding ground
Note 1 to entry: Also known as “infiltration”.
3.1.7
storage system
system designed to provide an underground storage facility for storm water
3.1.8
type testing
initial testing performed according to the testing requirements in this document, the results of which
are the specified requirements of the specific product being tested
Note 1 to entry: See ISO/IEC 17000:2020, 5.1, for a definition of "specified requirements".
3.2 Material terms
3.2.1
virgin material
material in a form such as granules or powder that have not been subjected to use or processing other
than that required for their manufacture and to which no reprocessed or recycled material has been
added
3.2.2
non-virgin material
material from used or unused infiltration and attenuation chambers and end caps which have been
cleaned and crushed or ground, or material from used or unused PP or PE products other than
infiltration and attenuation chambers and end caps, regardless of where they are manufactured
3.2.3
agreed specification
relevant material characteristics agreed between the supplier of the material and the chamber and end
cap manufacturer
3.3 Mechanical terms
3.3.1
flattening capacity
specific mechanical characteristic of arch-shaped chambers determined in the arch stiffness test
3.3.2
arch stiffness constant
ASC
specific mechanical characteristic of arch-shaped chambers determined in arch stiffness test (kN/m)
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ISO 4982:2023(E)
3.3.3
end cap stiffness constant
CSC
specific mechanical characteristic of end caps determined in shell stiffness test (kN)
3.3.4
stub compression strength
short-term compression strength expressed as the maximum force per length of chamber wall obtained
during a specified constant displacement rate compression test of a small section of chamber wall (see
Annex D) (kN/m)
4 Symbols and abbreviated terms
4.1 Symbols
For the purposes of this document, the following symbols apply.
2
A area of chamber wall (mm /mm) in x-y-plane at feet and y-z-plane at crown
C arch stiffness constant
AS
C end cap stiffness constant
ES
e measured wall thickness at any point of a chamber
e linear distance in radial direction from bottom surface of the valley to the outer surface of the
c
crest, taken in a particular spot in the chamber
F loading force
G average weight of soil
h maximum cover over the crown of the chamber according to the manufacturer’s installation
manual
H maximum vertical outside dimension (y-direction) of chamber from bottom to top
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I moment of inertia of chamber wall around x-axis (mm /mm)
L maximum horizontal outer dimension (z-direction) of chamber from one end to the other
L length of chamber in arch stiffness test
ASC
R maximum vertical clear inside dimension (y-direction) of chamber from bottom to top
R initial rise
0
S maximum horizontal clear inside dimension (x-direction) of chamber at feet
W maximum horizontal outside dimension (x-direction) of chamber at feet
Δy
test deflection
φ creep ratio from stub compression testing (with index i being the number of tests)
i
φ creep ratio from stub compression testing at a load level defined as 25 % of strength
0,25
4.2 Abbreviated terms
For the purposes of this document, the following abbreviated terms apply.
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ISO 4982:2023(E)
ASC arch stiffness constant
CSC end cap stiffness constant
MFR melt mass-flow rate
OIT oxidation induction time
PE Polyethylene
PP Polypropylene
5 Material
5.1 General
The material shall be either PE or PP, to which may be added:
— mineral modifier(s) of known specification;
— additives needed to facilitate the manufacture of components conforming to this document.
The material used to manufacture the arch-chambers or end caps shall consist of a material or
mixtures of different materials each of which shall have an agreed specification between supplier and
manufacturer (see Annex A).
5.2 Polyethylene (PE) material
5.2.1 General
The material shall be either PE virgin, PE modified or PE non-virgin material, conforming to 5.2.2 –
5.2.4, as appropriate.
5.2.2 Polyethylene (PE) virgin material
The material for arch-shaped chambers and end caps shall be a compound of PE virgin material and
those additives that are needed to facilitate the manufacture of arch-shaped chambers and end caps
conforming to the requirements of this document.
When reworked material is added to a level of less than 10 %, the material for chambers can still be
considered as virgin.
5.2.3 Polyethylene (PE) modified with minerals
The material for arch-shaped chambers and end caps shall be a compound of PE virgin material
modified with minerals and those additives that are needed to facilitate the manufacture of arch-
shaped chambers and end caps conforming to the requirements of this document.
If calcium carbonate is used, only coated calcium carbonate shall be used.
The content of minerals in the final compound shall be less than 50 % by mass.
When reworked material is added to a level of less than 10 %, the material for chambers can still be
considered as modified.
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ISO 4982:2023(E)
5.2.4 Polyethylene (PE) non-virgin material
The material for arch-shaped chambers and end caps shall be a compound of non-virgin PE material,
and those additives that are needed to facilitate the manufacture of arch-shaped chambers and end
caps conforming to the requirements of this document.
Non-virgin materials shall be permitted to be used up to 100 % or added to virgin or reworked material
or a mixture of those two materials.
The content of minerals in the final compound shall be less than 50 % by mass.
5.3 Polypropylene (PP) material
5.3.1 General
The material shall be either PP virgin, PP modified, or PP non-virgin material, conforming to 5.3.2 –
5.3.4 as appropriate.
5.3.2 Polypropylene (PP) virgin material
The material for arch-shaped chambers and end caps shall be a compound of PP virgin material and
those additives that are needed to facilitate the manufacture of chambers or end caps conforming to
the requirements of this document.
When reworked material is added to a level of less than 10 %, the material for chambers can still be
considered as virgin.
5.3.3 Polypropylene (PP) modified with minerals
The material for arch-shaped chambers and end caps shall be a compound of PP virgin material
modified with minerals and those additives that are needed to facilitate the manufacture of arch-
shaped chambers and end caps conforming to the requirements of this document.
If calcium carbonate is used, only coated calcium carbonate shall be used.
The content of minerals in the final compound shall be less than 50 % by mass.
When reworked material is added to a level of less than 10 %, the material for chambers can still be
considered as modified.
5.3.4 Polypropylene (PP) non-virgin material
The material for arch-shaped chambers and end caps shall be a compound of non-virgin PP material,
and those additives that are needed to facilitate the manufacture of arch-shaped chambers and end
caps conforming to the requirements of this document.
Non-virgin materials shall be permitted to be used up to 100 % or added to virgin or reworked material
or a mixture of those two materials.
The content of minerals in the final compound shall be less than 50 % by mass.
5.4 Chamber and end cap material characteristics
A product in this document is formed by a combination of a material specification, a design and a
manufacturing process. Table 1 specifies the minimum required tests to fingerprint the material and to
partly specify the material requirements.
In conformance with the results from type testing, a product specific material specification with
specified requirements shall be defined by the manufacturer.
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ISO 4982:2023(E)
When tested after type testing in accordance with the test methods as specified in Table 1, using the
indicated parameters, the material used for the chambers and end caps shall have the characteristics
conforming to the requirements given in Table 1.
Table 1 — Material characteristics of chambers and end caps
Characteristic Material Requirement Test parameters Test method
Tensile strength – PE The values ob- Test speed: 50 mm/min ISO 527-2
Short term tained shall meet or
Specimen type: 1A (ISO 527-2)
exceed the specified
requirement for
the product being
a
tested.
PP The values ob- Test speed: 50 mm/min ISO 527-2
tained shall meet or
Specimen type: 1A (ISO 527-2)
exceed the specified
requirement for
the product being
a
tested.
Tensile modulus – PE The values ob- Test speed: 1 mm/min ISO 527-2
short term tained shall meet or
exceed the specified
requirement for
the product being
a
tested.
PP The values ob- Test speed: 1 mm/min ISO 527-2
tained shall meet or
exceed the specified
requirement for
the product being
a
tested.
Flexural-creep PE The values ob- Test duration: 500 h ISO 899-2
modulus – 500 h tained shall meet or
Test stress: 2,0 MPa
exceed the specified
requirement for
Temperature: (23 ± 2) °C
the product being
a
tested.
PP The values ob- Test duration: 500 h ISO 899-2
tained shall meet or
Test stress: 2,0 MPa
exceed the specified
requirement for
Temperature: (23 ± 2) °C
the product being
a
tested.
Resistance to
...