EN 16916:2024

SLOVENSKI STANDARD
oSIST prEN 16916:2023
01-september-2023
Nadomešča:
SIST-TS CEN/TS 16916:2016
Snovi iz izrabljenih avtomobilskih gum - Določanje specifičnih zahtev za vzorčenje
in ugotavljanje deleža vlage z uporabo sušilnika
Materials obtained from End of Life Tyres - Determination of specific requirements for
sampling and determination of moisture content using the oven-dry method
Materialien aus Altreifen - Bestimmung der spezifischen Anforderungen für die
Probenahme und Bestimmung des Feuchtegehaltes aus dem Ofen-Trockenverfahren
Matériaux obtenus à partir de pneus usagés non réutilisables (PUNR) - Détermination
des exigences spécifiques relatives à l’échantillonnage et détermination de la teneur en
humidité selon la méthode de séchage à l’étuve
Ta slovenski standard je istoveten z: prEN 16916
ICS:
13.030.50 Recikliranje Recycling
83.160.01 Avtomobilske pnevmatike na Tyres in general
splošno
oSIST prEN 16916:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 16916:2023
oSIST prEN 16916:2023
DRAFT
EUROPEAN STANDARD
prEN 16916
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2023
ICS 13.030.50; 83.160.01 Will supersede CEN/TS 16916:2016
English Version
Materials obtained from End of Life Tyres - Determination
of specific requirements for sampling and determination of
moisture content using the oven-dry method
Materialien aus Altreifen - Bestimmung der
spezifischen Anforderungen für die Probenahme und
Bestimmung des Feuchtegehaltes aus dem Ofen-
Trockenverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 366.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16916:2023 E
worldwide for CEN national Members.

oSIST prEN 16916:2023
prEN 16916:2023 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
5 Apparatus . 4
6 Preparation of the sampling plan and laboratory sample . 4
6.1 Principles of sampling . 4
6.1.1 General . 4
6.1.2 Sampling plan . 5
6.2 Sampling point and apparatus . 5
6.2.1 Sampling point for stocked materials . 5
6.2.2 Sampling point for production samples. 6
6.3 Determination of lot size . 7
6.3.1 Lot size for production . 7
6.3.2 Lot size of stocked material . 7
6.4 Size of a sample increment . 7
6.5 Number of increments . 7
6.5.1 Number of increments from production process . 7
6.5.2 Number of increments from stocked materials in big bags . 8
6.6 Storage and transport of laboratory sample(s) . 8
7 Procedure. 8
7.1 Reference method . 8
8 Calculation .10
8.1 Moisture content – reference method .10
9 Test report .10
Bibliography .11

oSIST prEN 16916:2023
prEN 16916:2023 (E)
European foreword
This document (prEN 16916:2023) has been prepared by Technical Committee CEN/TC 366 “Materials
obtained from End-of-Life Tyres (ELT)”, the secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
This document will supersede CEN/TS 16916:2016.
oSIST prEN 16916:2023
prEN 16916:2023 (E)
1 Scope
This document specifies a method for determining the total moisture content of materials obtained from
End of Life Tyres (ELT) by drying samples in an oven. The method is applicable to chips, granulates,
powders and textile derived from the treatment of End of Life Tyres.
This document is not intended for the determination of moisture content in steel wires.
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.
CEN/TS 14243:2010, Materials produced from end of life tyres - Specification of categories based on their
dimension(s) and impurities and methods for determining their dimension(s) and impurities
3 Terms and definitions
For the purposes of this document, the terms and definitions given in CEN/TS 14243:2010 apply.
4 Principle
The sample of material is dried at a temperature of 105 °C in air atmosphere until constant mass is
reached. The percentage of moisture is calculated from the loss in mass of the sample. The method
includes a procedure for the correction of buoyancy effects.
5 Apparatus
5.1 Drying oven, capable of being controlled at (105 ± 2) °C (see declaration of the manufacturer) and
in which the air atmosphere changes between three and five times per hour.
The air velocity shall be such that the sample particles are not dislodged from their dish or tray (5.2).
5.2 Dishes or trays of non-corrodible and heat-resistant material and of such dimensions that they are
able to hold the total sample in the proportion of about 1 g of sample per 100 mm of surface area of the
dish or tray respectively or about 0,5 g per 100 mm for textile samples.
The surface of the dish or tray shall be such that the possibility to adsorption/absorption is minimized
(very clean and even surface).
5.3 Balance, capable of weighing the sample and dish or tray (5.2), as received, to the nearest 0,1 g.
6 Preparation of the sampling plan and laboratory sample
6.1 Principles of sampling
6.1.1 General
The main principle of sampling is to obtain a representative sample(s) from a lot of material from which
the moisture content shall be determined.
The objective of this procedure is to take samples in a way that is truly representative of the moisture
...