ISO/WD 4982

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

Titre manque

General Information

• Status: Published
• ICS: 23.040.20 - Plastics pipes
• ICS: 23.040.45 - Plastics fittings
• ICS: 91.140.80 - Drainage systems
• ICS: 93.030 - External sewage systems
• Technical Committee: ISO/TC 138/SC 1 - Plastics pipes and fittings for soil, waste and drainage (including land drainage)
• Drafting Committee: ISO/TC 138/SC 1/WG 4 - Plastics piping systems for underground drainage and sewerage
• Current Stage: 5000 - FDIS registered for formal approval
• Start Date: 07-Nov-2022
• Completion Date: 06-Jan-2023

Standards Content (Sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 4982
ISO/TC 138/SC 1 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2022-04-25 2022-07-18
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, transportation and storage
systems — Product specifications and performance criteria
ICS: 93.030; 23.040.20; 23.040.45; 91.140.80
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
This document is circulated as received from the committee secretariat.
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 4982:2022(E)
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 SUPPORTING DOCUMENTATION. © ISO 2022
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ISO/DIS 4982:2022(E)
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© ISO 2022

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© ISO 2022 – All rights reserved
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ISO/DIS 4982:2022(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 Geometric terms ................................................................................................................................................................................... 4

3.4 Mechanical terms ................................................................................................................................................................................. 4

4 Symbols and abbreviations ......................................................................................................................................................................5

4.1 Symbols ......................................................................................................................................................................................................... 5

4.2 Abbreviated terms .............................................................................................................................................................................. 5

5 Material.......................................................................................................................................................................................................................... 5

5.1 General ........................................................................................................................................................................................................... 5

5.2 Polyethylene (PE) material.......................................................................................................................................................... 6

5.2.1 General ........................................................................................................................................................................................ 6

5.2.2 Polyethylene (PE) virgin material ...................................................................................................................... 6

5.2.3 Polyethylene (PE) modified material ............................................................................................................... 6

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 material ........................................................................................................... 7

5.3.4 Polypropylene (PP) non-virgin material ....................................................................................................... 7

5.4 The content of minerals in the final compound shall be less than 50 % by mass.

Chamber and end cap material characteristics ........................................................................................................ 7

6 General characteristics for arch-shaped chambers and end caps ...............................................................10

6.1 Appearance ............................................................................................................................................................................................. 10

6.2 Colour ........................................................................................................................................................................................................... 10

7 Geometrical characteristics .................................................................................................................................................................10

7.1 General ........................................................................................................................................................................................................ 10

7.2 Volume......................................................................................................................................................................................................... 12

7.3 Weight ...................................................................... ....................................................................................................................................12

8 Physical characteristics ............................................................................................................................................................................12

8.1 Physical characteristics of PE chambers and end caps ...................................................................................12

8.2 Physical characteristics of PP chambers and end caps ...................................................................................12

9 Mechanical characteristics ....................................................................................................................................................................13

10 Marking ........................................................................................................................................... ............................................................................14

10.1 General ........................................................................................................................................................................................................ 14

10.2 Minimum required marking .................................................................................................................................................... 14

10.2.1 Arch-shaped chamber ................................................................................................................................................. 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 test for arch-shaped chambers .............................................................................18

Annex C (normative) Stiffness test for end caps ...................................................................................................................................21

Annex D (normative) Stub compression test ...........................................................................................................................................25

Annex E (normative) Stub creep testing under compression ................................................................................................29

iii
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ISO/DIS 4982:2022(E)

Annex F (normative) Arched-shaped chamber volume calculation ................................................................................32

Annex G (informative) Installation of arch-shaped chambers .............................................................................................35

Bibliography .............................................................................................................................................................................................................................38

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ISO/DIS 4982:2022(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 01, 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/DIS 4982:2022(E)
Introduction

WD 4982 is a system standard covering arch-shaped, corrugated wall chambers made of PE, PP and

used for infiltration, attenuation and storage of storm water.

At the time of drafting of this ISO standards 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 or available in the market they will be included in this standard.

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 arch-shaped, corrugated wall chamber systems requires consideration of the structural contribution

from the surrounding backfill materials.

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 circular thermoplastic pipes. Guidance for structural design can be found in ASTM F2787, Standard

Practice for Structural Design of Thermoplastic Corrugated Wall Stormwater Collection Chambers.

Guidance for installation can be found in Annex G.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 4982:2022(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, transportation and storage
systems — Product specifications and performance criteria
1 Scope

This document gives the definitions and specifies the minimum requirements for injection moulded,

compression moulded, extruded and thermoformed thermoplastics 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) and 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 detention and retention 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 properties are determined by a combination of material specifications, design and

manufacturing process.

These chambers are intended to be used as elements in a modular system where the manufacturer has

clearly stated in the documentation how the components are assembled to create a complete retention,

detention, transportation or storage 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

testISO 472, Plastics — Vocabulary

ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and

extrusion plastics

ISO 580, 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 899-1, Plastics — Determination of creep behaviour — Part 1: Tensile creep

ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special

characteristics
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ISO/DIS 4982:2022(E)

ISO 1133, Plastics — Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR)

of thermoplastics
ISO 9967, Thermoplastics pipes — Determination of creep ratio

ISO 1167-1, 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 3451-1, Plastics — Determination of ash — Part 1: General methods
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)

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 terminological 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 chambers

chambers are arch-shaped products which define a subsurface open space when installed

Note 1 to entry: The 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 caps

end caps, integral or separate, are arch-shaped products which cover the open ends of the chamber

rows
3.1.3
corrugation

periodic shape of arch-shaped chamber or end cap walls. A wall profile consists of a regular pattern of

alternating crests and valleys connected by webs
3.1.4
system

construction consisting of a single horizontal layer of connected arch-shaped chambers and caps and

associated with backfill material
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ISO/DIS 4982:2022(E)
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 to prove that the material is capable of conforming to the requirements given

in the relevant standard.
3.2 Material terms
3.2.1
material
material specified for a particular component in a chamber
3.2.2
virgin material

material in the 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
3.2.3
mineral modified material

material to which minerals have been added during specified processing operation(s) which during

such processing is distributed in the material
3.2.4
reworked material

material prepared from rejected unused chambers and end caps and/or integral components, including

trimmings from the production of chambers and end caps, that will be reprocessed in a manufacturer’s

plant after having been previously processed by the same manufacturer by a process such as moulding,

extrusion or thermoforming, and for which the complete formulation is the same
3.2.5
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

3.2.6
agreed specification

specification of the relevant material characteristics agreed between the supplier of the material and

the chamber and end cap manufacturer
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ISO/DIS 4982:2022(E)
3.3 Geometric terms
3.3.1
arch-shaped chamber width
maximum horizontal outside dimension (y-direction) of chamber at feet
3.3.2
Arch-shaped chamber span
Maximum horizontal clear inside dimension (y-direction) of chamber at feet
3.3.3
chamber height
maximum vertical outside dimension (z-direction) of chamber from bottom to top
3.3.4
chamber rise

Maximum vertical clear inside dimension (z-direction) of chamber from bottom to top

3.3.5
Arch-shaped chamber length

maximum horizontal outer dimension (x-direction) of chamber from one end to the other

3.3.6
wall thickness
measured wall thickness at any point of a chamber
3.3.7
corrugation height

linear distance in radial direction from bottom surface of the valley to the outer surface of the crest,

taken in a particular spot in the chamber
3.3.8
corrugation area
area of chamber wall [mm /mm] in x-y-plane at feet and y-z-plane at crown
3.3.9
moment of inertia, corrugation
moment of inertia of chamber wall around x-axis [mm /mm]
3.4 Mechanical terms
3.4.1
flattening capacity

specific mechanical characteristic of arch-shaped chambers determined in the arch stiffness test

3.4.2
arch stiffness constant (ASC)

specific mechanical characteristic of arch-shaped chambers determined in arch stiffness test [kN/m]

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ISO/DIS 4982:2022(E)
3.4.3
end-cap stiffness constant (CSC)

specific mechanical characteristic of end caps determined in shell stiffness test [kN]

3.1.4.5
stub compression strength

Specific mechanical characteristic of arch-shaped chambers determined in stub compression test.

[kN/m]
4 Symbols and abbreviations

For the purposes of this document, the following symbols and abbreviations apply.

4.1 Symbols
L length of chamber
L length of chamber in arch stiffness test
ASC
H height of chamber
e wall thickness (at any point)
e corrugation height
S span of chamber
R rise of chamber
R initial rise
F loading force
4.2 Abbreviated terms
ASC arch stiffness constant
MFR melt mass-flow rate
OIT oxidation induction time
PE Polyethylene
PP Polypropylene
CSC end-cap stiffness constant
5 Material
5.1 General

The material shall be one of the following: PE or PP, to which may be added: mineral modifier(s) of

known specification, additives needed to facilitate the manufacture or improve the properties of

components conforming to this document.

The material shall have an agreed specification between supplier and manufacturer or the interested

parties.
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ISO/DIS 4982:2022(E)
5.2 Polyethylene (PE) material
5.2.1 General

The material shall be one of the following: PE virgin, PE modified, or PE non-virgin material conforming

to clause 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 material

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 or improve

the properties 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.
5.2.4 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 or improve the properties 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 one of the following: PP virgin, PP modified, or PP non-virgin material, conforming

to clause 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.
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ISO/DIS 4982:2022(E)
5.3.3 Polypropylene (PP) modified material

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 or improve

the properties 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 or improve the properties 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.

5.4 The content of minerals in the final compound shall be less than 50 % by mass.

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.

When tested 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 A.1.
Table 1 — Material characteristics of chambers and end caps
Characteristic Material Requirement Test parameters Test method
Tensile strength – PE Declared value but Test speed 50 mm/min ISO 527-2
Short term not less than the
Specimen type 1A
value obtained on ma-
terial from the same
produ
...