EN ISO 8795:2001

SLOVENSKI STANDARD
01-junij-2002
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Plastics piping systems for the transport of water intended for human consumption -
Migration assessment - Determination of migration values of plastics pipes and fittings
and their joints (ISO 8795:2001)
Kunststoff-Rohrleitungssysteme für den Transport von Wasser für den menschlichen
Verzehr - Bewertung der Migration - Bestimmung der Migrationswerte von Rohren und
Formstücken aus Kunststoff und deren Verbindungen (ISO 8795:2001)
Systemes de canalisations plastiques pour le transport d'eau destinée a la
consommation humaine - Evaluation de la migration - Détermination des valeurs de
migration des tubes et raccords plastiques et de leurs assemblages (ISO 8795:2001)
Ta slovenski standard je istoveten z: EN ISO 8795:2001
ICS:
13.060.20 Pitna voda Drinking water
23.040.20 Cevi iz polimernih materialov Plastics pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 8795
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2001
ICS 23.040.20; 91.140.60 Supersedes EN 852-1:1996
English version
Plastics piping systems for the transport of water intended for
human consumption - Migration assessment - Determination of
migration values of plastics pipes and fittings and their joints
(ISO 8795:2001)
Systèmes de canalisations plastiques pour le transport Kunststoff-Rohrleitungssysteme für den Transport von
d'eau destinée à la consommation humaine - Evaluation de Wasser für den menschlichen Verzehr - Bewertung der
la migration - Détermination des valeurs de migration des Migration - Bestimmung der Migrationswerte von Rohren
tubes et raccords plastiques et de leurs assemblages (ISO und Formstücken aus Kunststoff und deren Verbindungen
8795:2001) (ISO 8795:2001)
This European Standard was approved by CEN on 10 August 2000.
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 Management Centre 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 Management Centre 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
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8795:2001 E
worldwide for CEN national Members.

Page 2
Contents
Page
Foreword .3
1 Scope.4
2 Normative references.4
3 Terms and definitions .4
4 Principle.5
5 Reagents.5
5.1 Test liquids.5
5.2 General requirements for the liquids .6
5.3 Selection of test liquids to perform the test.6
6 Test temperatures .6
7 Apparatus .6
8 Test pieces .6
8.1 General.6
8.2 Preparation .7
9 Procedure.7
9.1 General.7
9.2 Stagnation.8
9.3 Prewashing .8
9.4 Migration test .9
9.5 Analysis of constituents .9
10 Expression of results .9
11 Test report.10
Annex A Test liquids.11
(normative)
Annex B Preparation of test pieces for testing pipes, fittings or joints with nominal
(normative)
size greater than 80.13
Bibliography.18

Page 3
Foreword
The text of EN ISO 8795:2001 has been prepared by Technical Committee CEN/TC 155 "Plastics
piping systems and ducting systems", the secretariat of which is held by NEN, in collaboration with
Technical Committee ISO/TC 138 "Plastics pipes, fittings and valves for the transport of fluids".
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 2001, and conflicting national standards
shall be withdrawn at the latest by September 2001.
This Standard replaces EN 852-1:1996. This revision contains the addition of requirements for fittings
and joints.
NOTE 1 ISO 8795:1998 is a revision of ISO 8795:1990 and is identical with EN 852-1:1996.
Plastics pipes for the transport of water intended for human
It is based on ISO 8795:1990 "
consumption - Extractability of constituents - Test method
", published by the International Organisation
for Standardisation (ISO). It differs from ISO 8795:1990 due to the need for the test method to be
applicable to European conditions and practice.
The main modifications are:
a) testing of fittings and joints has been added;
b) test liquids:
- the addition of neutral water (pH = 7,0) to cover non-European conditions;
- pH 9 has been added, to cover European conditions (see Directive 98/83/EC Part C);
- pH 11 is mentioned;
- addition of test liquid with an active chlorine content of 1 mg/l;
c) a stagnation period has been added;
d) exposure time: 72 h is specified for cold water applications and 24 h is specified for warm and
hot water applications;
e) temperatures:
- 70 °C is specified for moderate hot water conditions;
f) large diameter pipes, fittings and joints: a procedure for testing has been added.
Annex A, which is normative, describes the preparation of test liquids.
Annex B, which is normative, describes the preparation of test pieces for testing pipes, fittings and
joints with nominal sizes greater than 80.
Further is included a bibliography.
This standard is one of a series of standards on test methods which support System Standards for
plastics piping systems and ducting systems.
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.

Page 4
1  Scope
This standard specifies a method for the determination of the migration of constituents from the
internal surface of plastics pipes, fittings and joints. Organoleptic and microbiological assessments are
not included.
This standard is applicable to all plastics pipes, fittings and joints to be used for the transport of water
intended for human consumption and raw water used for the manufacturing of water intended for
human consumption. It covers all constituents which are extractable by water from a finished pipe,
fitting or joint. It provides for a change in procedure as necessary depending upon the size of the pipe,
fitting or joint.
NOTE 1 It is assumed that the referring standards or regulations making reference to this standard include the
following information (see also the note to clause 4):
a) choice of test liquid(s) (see 5.3);
b) choice of test temperature(s) (see clause 6).
NOTE 2 The pre-treatment procedures, test liquids and test temperatures mentioned in this standard cover the
present situation. When new and/or different conditions are formulated (currently under discussion) the standard
will be amended accordingly.
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 (including
amendments).
EN ISO 3696:1995, Water for analytical laboratory use — Specification and test methods
(ISO 3696:1987)
ISO 7393-2:1985, Water quality - Determination of free chlorine and total chlorine - Part 2:
Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
3  Terms and definitions
For the purposes of this standard the following terms and definitions apply.
3.1
migration
movement of substances from one material (e.g. plastics pipe) into another (test liquid)
3.2
test liquid
specified water for migration testing
3.3
migration value (M)
mass of constituent(s) migrated from a specified surface area of a test piece exposed to a test liquid
at a specified temperature over a specified time
3.4
tapwater
water intended for human consumption
3.5
fitting
component, other than a pipe which is used in a pipeline (e.g. bends, tees, end caps, valves )

Page 5
3.6
joint
connection between the ends of two components (electrofusion joints are included)
3.7
migration liquid
test liquid which has been in contact with a test piece under specified conditions
3.8
migration number (n)
number of migrations conducted sequentially
4  Principle
Test pieces are subjected to stagnation and prewashing with tapwater for a specified time. The test
pieces are then filled with the specified test liquid at a specified temperature and kept for a series of
specified migration periods. The migration liquid is then analysed to assess any constituents which
were able to migrate.
NOTE It is assumed that the following test parameters are set by the standard(s) making reference to this
standard:
a) the test liquid(s) (see 5.3);
b) the test temperature, T, if other than as given in clause 6;
c) the number of pairs of test pieces (see 9.1.1);
d) the constituents for which analysis is to be made both upon test pieces and the blank test and the required
accuracy, taking account of 9.5 (see also clause 10).
5  Reagents
5.1 Test liquids
NOTE Methods for the preparation of test liquids are given in annex A.
5.1.1 Water,
conforming to grade 3 of EN ISO 3696:1995, with the following characteristics:


a) a conductivity of 10 mS/m at 25 °C;


b) total organic carbon (TOC) content 0,2 mg/l (as carbon).
5.1.2 Chlorinated water,
conforming to 5.1.1 with an active chlorine concentration of (1 ± 0,2) mg/l.
5.1.3 Acidic water,
comprising water conforming to 5.1.1, adjusted to a pH of (4,5 ± 0,1) with a
potassium dihydrogen phosphate (KH PO ) buffer solution conforming to A.1.2.
2 4
5.1.4 Chlorinated acidic water,
comprising water conforming to 5.1.1, adjusted to a pH of
(4,5 ± 0,1) with a KH PO buffer solution conforming to A.1.2 and an active chlorine concentration of
2 4
(1 ± 0,2) mg/l.
5.1.5 Alkaline water type I (for European conditions),
comprising water conforming to 5.1.1,
adjusted to a pH of (9,0 ± 0,1) with a borate buffer solution conforming to A.1.3.
5.1.6 Alkaline water type II (for non-European conditions)
, comprising water conforming to 5.1.1,
adjusted to a pH of (11,0 ± 0,1) with a sodiumhydroxide / sodium tetraborate buffer solution
conforming to A.1.4.
5.1.7 Neutral water (for non-European conditions),
comprising water conforming to 5.1.1,
adjusted to a pH of (7,0 ± 0,1) with a potassium dihydrogen phosphate (KH PO ) buffer solution
2 4
conforming to A.1.5.
...