Bsi bs en 00681 2 2000 (2002)

BS EN
681-2:2000

BRITISH STANDARD

Incorporating
Amendment No. 1 and
Corrigendum No. 1

Elastomeric seals —
Materials requirements
for pipe joint seals used
in water and drainage
applications —
Part 2: Thermoplastic elastomers

The European Standard EN 681-2:2000, with the incorporation of
amendment A1:2002, has the status of a British Standard

ICS 23.040.80

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BS EN 681-2:2000
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National foreword
This British Standard is the official English language version of
EN 681-2:2000, including amendment A1:2002. Together with
BS EN 682:2002, this publication supersedes BS 2494:1990 which is
withdrawn.
The start and finish of text introduced or altered by amendment is indicated in
the text by tags !". Tags indicating changes to CEN text carry the number
of the CEN amendment. For example, text altered by CEN amendment A1 is
indicated by !".
The UK participation in its preparation was entrusted to Technical Committee
PRI/70, Elastomeric seals, which has the responsibility to:
—

aid enquirers to understand the text;

—

present to the responsible international/European committee any
enquiries on the interpretation, or proposals for change, and keep the
UK interests informed;

—

monitor related international and European developments and
promulgate them in the UK.

A list of organizations represented on this committee can be obtained on
request to its secretary.
Cross-references
The British Standards which implement international or European
publications referred to in this document may be found in the BSI Catalogue
under the section entitled “International Standards Correspondence Index”, or
by using the “Search” facility of the BSI Electronic Catalogue or of British
Standards Online.
This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for their correct application.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.

This British Standard, having
been prepared under the
direction of the Materials and
Chemicals Sector Policy and
Strategy Committee, was
published under the authority
of the Standards Policy and
Strategy Committee on
15 September 2000

Summary of pages
This document comprises a front cover, an inside front cover, the EN title page,
pages 2 to 20, an inside back cover and a back cover.
The BSI copyright date displayed in this document indicates when the
document was last issued.

Amendments issued since publication

© BSI 26 August 2002

Amd. No.

Date

Comments

13837

28 March 2002

Addition of supersession details to
national foreword

13705

26 August 2002

See national foreword

Corrigendum No. 1

ISBN 0 580 36222 1

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EN 681-2

EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM

July 2000

+ A1
March 2002
ICS 23.040.50

English version

Elastomeric seals – Materials requirements for pipe joint seals
used in water and drainage applications – Part 2: Thermoplastic
elastomers
(includes amendment A1:2002)
Garnitures d’étanchéité en caoutchouc – Spécification des
matériaux pour garnitures d’étanchéité utilisées dans le
domaine de l’eau et du drainage – Partie 2: Elastomères
thermoplastiques
(inclut l΄amendement A1:2002)

Elastomer-Dichtungen – Werkstoff-Anforderungen für

Rohrleitungs-Dichtungen für Anwendengen in der
Wasserversorgung und Entwässerung – Teil 2:
Thermoplastische Elastomere
(enthält Änderung A1:2002)

This European Standard was approved by CEN on 3 June 2000. Amendment A1 was approved by CEN on 25 February 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG

Central Secretariat: rue de Stassart, 36

© 2000 CEN

All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.

B-1050 Brussels

Ref. No. EN 681-2:2000 + A1:2002 E

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Page 2
EN 681-2:2000

Contents
Page
Foreword

3

1

Scope

4

2

Normative references

4

3

Definitions

5

4

Classification

5

5

Finished seal requirements

6

6

Test pieces and temperature

11

7

Factory production control

12

8

Factory product control tests

12

9

Storage

14

10

Designation

15

11

Marking and labelling

15

Annex A (informative) Guidance on storage of seals .....................................................

16

Annex ZA (informative) Clauses of this European Standard addressing the

provisions of the EU Construction Products Directive

17

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EN 681-2:2000

Foreword
This European Standard has been prepared by Technical Committee CEN/TC 208, Elastomeric
seals for joints in pipework and pipelines, the Secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by January 2001, and conflicting national
standards shall be withdrawn at the latest by January 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
This part has been prepared in response to requests from CEN/TC 155 for a material
specification for thermoplastic elastomer seals for use in conjunction with non-pressure

thermoplastic pipe systems.
A European Standard will be prepared for microbiological deterioration requirements and when
published it is intended that materials comply with the requirements of that standard.
It is recommended that third party inspection be carried out at least twice a year without previous
notice, the assessment body complying with the requirements of EN 45011 and EN 45012 or
equivalent.

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Part 1 of this standard is based on ISO 4633 and ISO 9631, bringing these two sets of
requirements (for cold and hot water respectively) under one specification. The major changes
from ISO 4633 and ISO 9631 have been to incorporate requirements for effect on water quality
and ozone resistance. The emphasis in respect of low temperature testing has moved away
from hardness measurement to compression set, which is more discriminating.
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Part 3 has been prepared in response to requests from those sections of the pipeline industry
which employ cellular seals of vulcanized rubber.
Part 4 has been prepared in response to requests from those sections of the pipeline industry
which employ cast polyurethane seals.
This standard should be used where appropriate with product standards which specify
performance requirements for joints.
Seals and pipe joints using thermoplastic elastomers should be designed and tested to take into
account the different requirements compared with those specified in Part 1 of this standard.
In accordance with the common CEN/CENELEC Rules member states are required to
transpose the European Standard into a national standard no later than six months following its
date of adoption (DOA) by the BT. At this time any existing national standards having the same
scope are withdrawn (DOW).
Annex A is informative.

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EN 681-2:2000

Foreword to amendment A1
This document EN 681-2:2000/A1:2002 has been prepared by Technical Committee
CEN/TC 208, Elastomeric seals for joints in pipework and pipelines, the Secretariat of
which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by September 2002, and conflicting national
standards shall be withdrawn at the latest by December 2003.
This document has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

1 Scope

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This standard specifies requirements for materials used for moulded seals only of
thermoplastic elastomers (TPE) used in joints of:
1) thermoplastic piping systems for non pressure waste water discharge
(intermittent flow up to 95 °C) inside buildings;

2) thermoplastic piping systems for non-pressure underground drainage and
sewerage (continuous flow up to 45 °C and intermittent flow up to 95 °C);
3) thermoplastic rainwater piping systems.
General requirements for finished joint seals are also given; any additional requirements
called for by the particular application are specified in the relevant product standards
taking into account that the performance of pipe joints is a function of the seal material
properties, seal geometry and pipe joint design.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from
other publications. These normative references are cited at the appropriate places in the
text and the publications are listed hereafter. For dated references, subsequent
amendments to or revisions of any of these publications apply to this European Standard
only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.

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EN 681-2:2000

ISO 37,

Rubber, vulcanized or thermoplastic - Determination of tensile stressstrain properties

ISO 48,

Rubber, vulcanized or thermoplastic - Determination of hardness
(hardness between 10 and 100 IRHD)

ISO 188,

Rubber, vulcanized - Accelerated ageing or heat-resistance tests

ISO 471,

Rubber - Temperatures, humidities and times for conditioning and
testing

ISO 815,

Rubber, vulcanized or thermoplastic - Determination of compression
set at ambient, elevated or low temperatures

ISO 1431-1,

Rubber, vulcanized or thermoplastic - Resistance to ozone cracking Part 1: Static strain test

ISO 1817,

Rubber, vulcanized - Determination of the effect of liquids

ISO 2859-1,

Sampling procedures for inspection by attributes - Part 1: Sampling
plans indexed by acceptable quality level (AQL) for lot-by-lot
inspection

ISO 3302-1,

Rubber - Tolerances for products - Part 1: Dimensional tolerances

ISO 3384:1999,

Rubber, vulcanized or thermoplastic - Determination of stress
relaxation in compression at ambient and at elevated temperatures

ISO 3951,

Sampling procedures and charts for inspection by variables for
percent nonconforming

ISO 4661-1,

Rubber, vulcanized or thermoplastic - Preparation of samples and test
pieces - Part 1: Physical tests

ISO 9691:1992,

Rubber - Recommendations for the workmanship of pipe joint rings Description and classification of imperfections

EN ISO 9002,

Quality systems – Model for quality assurance in production,
installation and servicing (ISO 9002:1994)

EN ISO 9003,

Quality systems – Model for quality assurance in final inspection and
test (ISO 9003:1994)

3 Definitions
For the purposes of this standard the following definition applies.
Thermoplastic elastomer
a polymer or blend of polymers that does not require vulcanization or crosslinking during
processing, yet has elastic properties, at its service temperature. These properties
disappear at processing temperature, so that further processing is possible, but return
when the material is returned to its service temperature.
4 Classification
A nominal hardness of materials shall be specified within the ranges in table 1.
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Page 6
EN 681-2:2000

!Table 1 - Hardness categories
Hardness category

50

60

70

Range of hardness,
IRHD

46 / 55

56 / 65

66 / 75

"
The three classes of hardness for materials for pipe joints seals are specified in table 2.
5 Finished seal requirements
5.1 Dimensional tolerances.
Tolerances shall be specified from the appropriate classes in ISO 3302-1.
5.2 Imperfections and defects
The seals shall be free of defects or irregularities which could affect their function.
Classification of imperfections shall be according to ISO 9691:1992 as follows:

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- surface imperfections in zones involved in the sealing function as described in 4.1.1
of ISO 9691:1992 shall be considered as defects.
- surface imperfections in zones not involved in the sealing function as described in
4.1.2.1b) of ISO 9691:1992 shall not be considered as defects.
NOTE 1: Major surface imperfections in zones not involved in the sealing function as described in
4.1.2.1a) of ISO 9691:1992 could be considered as defects. This should be agreed between the
interested parties; the acceptance criteria depend upon the seals' type or design respectively.

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NOTE 2: Internal imperfections as described in 4.2 of ISO 9691:1992 could be considered as defects.
1)
The compressive force can be determined according to ISO 7743 . The acceptable limiting values of
the compressive force should be agreed between the interested parties; they depend upon the seals'
type or design respectively.

5.3 Hardness
When determined by the micro-test method specified in ISO 48, on samples prepared in
accordance with 6.1.2, the hardness shall comply with the requirements given in table 2.

NOTE: If the dimensions of a seal are appropriate, the normal test method specified in ISO 48 can be
used, provided that the micro-test method is used for reference purposes.

For the same seal, the difference between the minimum and maximum hardness values
shall not be more than 5 IRHD. Each value shall be within the specified tolerances.

1)

ISO 7743, Rubber, vulcanized or thermoplastic - Determination of compression stressstrain properties
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EN 681-2:2000
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5.4 Tensile strength and elongation at break
The tensile strength and elongation at break shall be determined by the method specified
in ISO 37 in the direction perpendicular to the mould flow on dumb-bell test pieces,
preferably cut out of a seal or out of a sample plate. The results obtained on sample plate
test pieces shall be accepted.
Sample plates shall be prepared as specified in 6.1.1 and 6.1.3. The tensile strength and
elongation at break shall comply with the requirements given in table 2.
5.5 Compression set in air

5.5.1 General
If the test piece is taken from a seal, then the measurement shall be carried out as far as
possible in the direction of compression of the seal in service at 25 % compression.
5.5.2 Compression set at 23 °C and 70 °C
When determined by the method specified in ISO 815, at 23 °C and 70 °C, using the small
type B test piece, the compression set shall comply with the requirements given in table 2.
5.5.3 Low temperature compression set at -10 °C
When determined by the method specified in ISO 815 at -10 °C, using the small type B
test piece, and the (30 ± 3) min recovery measurement, the compression set of seals used
in drainage and sewerage applications shall comply with the requirements given in
table 2.

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5.6 Accelerated ageing in air
Test pieces prepared for the determination of hardness according to 5.3 and for the
determination of tensile strength and elongation at break (see 5.4) shall be aged in air by
the normal oven method specified in ISO 188, for 7 days at 70 °C.
The changes in hardness, tensile strength and elongation at break shall comply with the
requirements given in table 2.
5.7 Stress relaxation in compression.
The stress relaxation shall be determined at 23 °C by method A of ISO 3384:1999 using
the small cylindrical test piece after applying mechanical and thermal conditioning.
Measurements shall be taken after 3 h 1, 3 and 7 days for the 7 day test and after 3 h 1,
3, 7, 30 and 100 days for the 100 days test.

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EN 681-2:2000

The best fit straight line shall be determined by regression analysis using a logarithmic
time scale and the correlation coefficients derived from these analyses shall not be lower
than 0,93 for the 7 day test and 0,83 for the 100 day test. The 7 and 100 days
requirements in table 2 are those derived from this straight line.
For continuous measurement using an apparatus described in the first paragraph of 5.2 of
ISO 3384:1999 the 7 days and 100 days requirements in table 2 are those derived from
the measurements at 7 and 100 days.
The stress relaxation in compression shall comply with the requirements given in table 2.
The test temperature shall be maintained within the specified tolerance during the whole
period of the test and verified by suitable recording equipment on a continuous basis.
The 100 days test shall be considered as a type approval test.
If the test piece is taken from a seal, then the measurement shall be carried out as far as
possible in the direction of compression of the seal in service.
5.8 Volume change in water
When determined by the method specified in ISO 1817 after 7 days immersion of test
pieces in distilled or deionized water at a temperature of 70 °C the change in volume shall
comply with the requirements given in table 2.

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5.9 Ozone resistance

Ozone concentration

(50 ± 5) pphm.

Temperature

(40 ± 2) °C.

Pretension time

(72 + 0/-2) h.

Exposure time

(48 + 0/-2) h.

Elongation

(20 ± 2) %.

Relative humidity

(55 ± 10) %.

the ozone resistance of thermoplastic elastomer sealing elements which are attached to
the pipe or fittings shall comply with the requirements given in table 2.
Thermoplastic elastomer sealing elements which are protected and packaged separately
up to the time of installation shall meet the same requirement but using an ozone
concentration of (25 ± 5) pphm.

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When determined by the method specified in ISO 1431-1 under the conditions set out
below:


Page 9
EN 681-2:2000

5.10 Optional requirement for type WH
Volume change in oil
The resistance to oil shall be determined by the volumetric method specified in ISO 1817.
The volume change of test pieces shall be determined after 72 h immersion in standard oil
No. 1 at a temperature of 70 °C.
The volume change in oil shall comply with the requirements given in table 2.

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EN 681-2:2000

Table 2 - Physical property requirements for materials of thermoplastic elastomer
(TPE) used in thermoplastic non-pressure and rainwater piping systems
Type WT, WH

Requirements for hardness

!categories"

Property
Permissible tolerance
on nominal hardness

Unit

Test Method

Clause

50

60

70

IRHD

ISO 48

5.3

±5

±5

±5

Tensile strength, min.

MPa

ISO 37

5.4

3

4

5

Elongation at break,

min.

%

ISO 37

5.4

300

300

300

72 h at 23 °C

%

ISO 815

5.5.2

25

25

25

24 h at 70 °C

%

ISO 815

5.5.2

40

40

40

72 h at -10 °C

%

ISO 815

5.5.3

65

65

65

ISO 188

5.6

Compression set, max.

Ageing, 7 days at 70
°C
Hardness change,
max.

IRHD

ISO 48

±5

±5

±5

Tensile strength
change, max.

%

ISO 37

±10

±10

±10

Elongation change,
max.

%

ISO 37

±15

±15

±15

Stress relaxation, max.

ISO 3384:1999 5.7

7 days at 23 °C

%

19

22

24

100 days at 23 °C

%

28

32

35

Volume change in
water, max.
7 days at 70 °C

%

ISO 1817

5.8

+8 / -1

+8 / -1

+ 8/ -1

Ozone resistance

-

ISO 1431-1

5.9

No cracking when viewed without
magnification

Optional requirements for Type WH
Volume change in oil,
max.

ISO 1817

5.10

72 h at 70 °C
oil No. 1

%

+50/-10

+50/-10

+50/10

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EN 681-2:2000

6 Test pieces and temperature
6.1 Preparation of test pieces
6.1.1 General

For tests in which different sizes of test pieces are permissible, the same size of test piece
shall be used for each batch and for any comparative purposes.
6.1.2 Samples for determination of hardness
Sample plates shall be injection moulded in an appropriate mould under conditions
simulating as closely as possible the actual seal moulding conditions. The hardness
measurement shall be carried out on a sample with a thickness of at least 6 mm,
obtained, if necessary, by superimposing several plates. Consequently, the measurement
can be effected on the sample plates used for the compression set determination or on
three superimposed sample plates used for the tensile testing.
6.1.3 Samples for determination of tensile strength
Sample plates shall be injection moulded in an appropriate mould under conditions
simulating as closely as possible the actual seal moulding conditions. Figures 1 and 2
give examples of such moulds.
6.1.4 Samples for determination of compression set
The test pieces shall be prepared from sample plates which have been injection moulded
in an appropriate mould under conditions simulating as closely as possible the actual seal
moulding conditions.
Figure 1 gives an example of such a mould.
6.2 Test temperature

Unless otherwise specified, tests shall be carried out at (23 ± 2) ºC in accordance
with ISO 471.
NOTE: Two standard laboratory temperatures are given in ISO 471.

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Unless otherwise specified, test pieces shall be cut from the finished product by the
method specified in ISO 4661-1. If satisfactory test pieces cannot be prepared in
accordance with the instructions given for the appropriate test method, they shall be taken
from test slabs or sheets, of suitable dimensions, made from the same batch of the
elastomer mix used to make the seals and moulded under conditions which are
comparable with those used in production.


Page 12
EN 681-2:2000
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7 !Factory production" control
The manufacturer shall establish and maintain an effective documented !factory
production" control system, so as to achieve compliance with product standards.
!Factory production" control shall comprise continuous inspection carried out by the

manufacturer to ensure compliance with the requirements of this product standard under a
quality system complying with EN ISO 9002 and EN ISO 9003 or equivalent.
8 Factory product control tests
8.1 Sampling
The product control tests shall be carried out on lots of finished components using
sampling procedures in accordance with either:
a) ISO 2859-1 with a specified inspection level of S2 and an AQL of 2,5 % for
attributes; or
b) ISO 3951 with a specified inspection level of S3 and an AQL of 2,5 % for
variables.
These requirements do not preclude the use by the manufacturer of more stringent
combinations of inspection levels and AQL values from ISO 2859-1 or ISO 3951.
8.2 Routine tests
The tests in accordance with 5.1 and 5.2 and the following tests according to the methods
listed in table 2 shall be carried out using test pieces in accordance with 6.1:
a) hardness;
b) tensile strength;
c) elongation at break;
d) compression set for 24 hours at 70 °C.
NOTE: These tests can be carried out by the supplier of raw material if it can be documented that the
tests are done on the same batch as the manufactured seals.

8.3 Type tests
All tests, except those having a duration in excess of 28 days, shall be carried out at least
annually and whenever the manufacturing technique is changed significantly. Those tests
having a duration in excess of 28 days shall be repeated at five yearly intervals. All tests,
without exception, shall also be carried out initially and whenever the elastomer
formulation is changed significantly.
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EN 681-2:2000
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Dimensions in millimetres

Section A-A
Key
1 Tensile test pieces
2 Compression set test specimens
NOTE:

The sample plates for the two types of test pieces can be moulded together as illustrated or
separately. The dumb-bell shape has been included to indicate its relation to the direction of
mould flow (See 5.4).

Figure 1 - Example of moulded sample plates for tensile strength
and compression set

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EN 681-2:2000

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Dimensions in millimetres

Key
1 Gate
2 Vent
3 Thickness of plate: 2,0 +/- 0,2
NOTE:

The dumb-bell shape has been included to indicate its relation to the direction of mould flow (see
5.4).

Figure 2 - Example of moulded sample plate for tensile strength
9 Storage
See Annex A.

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EN 681-2:2000

10 Designation
Elastomeric seals shall be identified as Type WT, or Type WH if oil resistant, and
designated as follows according to their intended application.
a) Description

eg. Lip seal.

b) European Standard number

i.e. EN 681-2.

c) Nominal size

eg. DN 110.

d) Type of application

eg. WT.

e) Elastomer Type

eg. TPE-V.

f) Joint name

eg. ‘Tradename’.

EXAMPLE: Lip seal/EN 681-2/DN 110/WT/TPE-V/Tradename.
11 Marking and labelling
Where the marking of each seal is impractical, each parcel of seals shall be marked
clearly and durably, as listed below, such that the sealing capability is not impaired. When
thermoplastic seals are integral to the pipe or fitting joint the marking may be placed on
the pipe/fitting:
a) Nominal size.
b) Manufacturer's identification.
c) The number of this standard with the type of application and hardness class as a
suffix, eg. EN 681-2/WT/50.
d) The quarter and year of manufacture.
e) Oil resistant (WH) if appropriate.
f) The abbreviation for the thermoplastic elastomer, e.g. TPE-V.

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EN 681-2:2000

Annex A (informative)
Guidance on storage of seals
At all stages between manufacture and use the seals should be stored in accordance with
the recommendations given in ISO 22301).
The following points should be noted:
a) The storage temperature should be below 25 °C and preferably below 15 ºC.
b) The seals should be protected from light, in particular strong sunlight and artificial
light with a high ultra-violet content.

d) The seals should be stored in a relaxed condition free from tension, compression
or other deformation. For instance, they should not be suspended from any part of
the circumference.
e) The seals should be maintained in a clean condition.

1)

ISO 2230, Vulcanized rubber - Guide to storage
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c) The seals should not be stored in a room with any equipment capable of
generating ozone, eg. mercury vapour lamps, high voltage electrical equipment,
which may give rise to electrical sparks or silent electrical discharges.


Page 17
EN 681-2:2000

!

Annex ZA
(informative)

Clauses of this European Standard addressing the provisions of the
EU Construction Products Directive
ZA.1 Scope and clauses of the European Standard addressing the essential
characteristics of the EU Construction Products Directive
With reference to clause 1, this Annex ZA has the same scope as clause 1.
This European Standard has been prepared under a mandate given to CEN by the
European Commission and the European Free Trade Association.
The clauses of this European Standard shown in Table ZA.1 below meet the requirements
of the mandate given under the EU Construction Products Directive (89/106).
Compliance with these clauses confers a presumption of fitness of thermoplastic
elastomer seals covered by this European Standard for their intended use.
WARNING Other requirements and other EU Directives, not affecting the fitness for
intended use, may be applicable to a construction product falling within the scope of this
standard.
NOTE In addition to any specific clauses relating to dangerous substances contained in this standard, there may be
other requirements applicable to the products falling within its scope (e.g. transposed European legislation and national
laws, regulations and administrative provisions). In order to meet the provisions of the EU Construction Products

Directive, these requirements need also to be complied with, when and where they apply.
NOTE An informative database of European and national provisions on dangerous substances is available at the
Construction web site on EUROPA (CREATE, accessed through ).

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EN 681-2:2000

Construction product: Thermoplastic elastomeric seals
Intended uses:

For pipe joints used in wastewater discharge and drainage
applications, excluding uses in contact with water intended for
human consumption.
Table ZA.1 — Relevant clauses

Requirement/characteristic
from the mandate

Requirement

clauses in
this standard

Dimensional tolerance
Tightness: gas and liquid

5.1
5.3, 5.4, 5.5,
5.8

Release of dangerous
substance
Durability

None
5.6, 5.7, 5.9

Mandated levels
and/or
classes

Notes

—
Threshold
values —
see Table 2
—

See ISO 3302-1

See ISO 48, ISO 37, ISO 815
and ISO 1817

Threshold
values —
see Table 2

See ISO 188, ISO 3384 and
ISO 1431-1

The requirement on a certain characteristic is not applicable in those Member States
(MSs) where there are no regulatory requirements on that characteristic for the intended
use of the product. In this case, manufacturers placing their products on the market of
these MSs are not obliged to determine nor declare the performance of their products
with regard to this characteristic and the option “No performance determined” (NPD) in the
information accompanying the CE marking (see clause ZA.3) may be used. The NPD
option may not be used, however, where the characteristic is subject to a threshold level.
ZA.2 Systems of attestation of conformity
The system of attestation of conformity for the thermoplastic elastomer seals indicated in
Table ZA.1, in accordance with the decision of the Commission “1999/472/EC of 1 July
1999” as given in Annex lll of the mandate M 131, Pipes, tanks and ancillaries not in
contact with water intended for human consumption, is shown in Table ZA.2 for the
indicated intended use(s).

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