oSIST prEN 13938-2:2021

Explosives for civil uses - Propellants and rocket propellants - Part 2: Determination of resistance to electrostatic energy

This document specifies a method for the determination of resistance to electrostatic energy for propellants containing a mass fraction of at least 5 % of particles which pass through a 1 mm sieve. This method does not apply to black powder
NOTE: If the mass fraction of particles smaller than 1 mm size is less than 5 % the propellant is considered to be insensitive to electrostatic energy and this test is not performed.

Explosivstoffe für zivile Zwecke - Treibladungspulver und Raketentreibstoffe - Teil 2: Bestimmung der Widerstandsfähigkeit gegen elektrostatische Energie

Dieses Dokument legt ein Verfahren für die Bestimmung der Widerstandsfähigkeit gegen elektrostatische Energie für Treibladungspulver, die mindestens 5 % Massenanteil an Partikeln enthalten, die durch ein Sieb mit einer Maschenweite von 1 mm hindurchpassen, fest. Dieses Verfahren gilt nicht für Schwarzpulver.
ANMERKUNG   Ist der Massenanteil an Partikeln, die kleiner als 1 mm sind, unter 5 %, dann wird davon ausgegangen, dass das Treibladungspulver unempfindlich gegenüber elektrostatischer Energie ist und diese Prüfung wird nicht durchgeführt.

Explosifs à usage civil - Poudres propulsives et propergols pour fusées - Partie 2 : Détermination de la résistance à l'énergie électrostatique

Le présent document spécifie une méthode de détermination de la résistance à l'énergie électrostatique des poudres propulsives contenant une fraction de masse d'au moins 5 % de particules passant à travers un tamis de 1 mm. La présente méthode ne s'applique pas à la poudre noire.
NOTE   Si la fraction de masse des particules de taille inférieure à 1 mm est inférieure à 5 %, la poudre propulsive est considérée insensible à l'énergie électrostatique, et cet essai n'est pas réalisé.

Eksplozivi za civilno uporabo - Smodniki in raketna goriva - 2. del: Ugotavljanje odpornosti proti elektrostatični energiji

General Information

• Status: Not Published
• Public Enquiry End Date: 02-May-2021
• ICS: 71.100.30 - Explosives. Pyrotechnics and fireworks
• Technical Committee: IEKS - Explosives
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 03-Mar-2021
• Due Date: 21-Jul-2021
• Completion Date: 07-May-2021
• Directive: 2014/28/EU - Directive 2014/28/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market and supervision of explosives for civil uses
• Mandate: M/055 - Standardization mandate to CEN for explosives for civil uses
• Ref Project: prEN 13938-2 - Explosives for civil uses - Propellants and rocket propellants - Part 2: Determination of resistance to electrostatic discharge

Relations

• Revised: SIST EN 13938-2:2005 - Explosives for civil uses - Propellants and rocket propellants - Part 2: Determination of resistance to electrostatic energy
• Effective Date: 01-Apr-2021
• Revised: SIST EN 13938-2:2005 - Explosives for civil uses - Propellants and rocket propellants - Part 2: Determination of resistance to electrostatic energy
• Effective Date: 18-Jan-2023
• Revised: SIST EN 13938-2:2005 - Explosives for civil uses - Propellants and rocket propellants - Part 2: Determination of resistance to electrostatic energy
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 13938-2:2021
01-april-2021
Eksplozivi za civilno uporabo - Smodniki in raketna goriva - 2. del: Ugotavljanje
odpornosti proti elektrostatični energiji
Explosives for civil uses - Propellants and rocket propellants - Part 2: Determination of
resistance to electrostatic energy
Explosivstoffe für zivile Zwecke - Treibladungspulver und Raketentreibstoffe - Teil 2:
Bestimmung der Widerstandsfähigkeit gegen elektrostatische Energie
Explosifs à usage civil - Poudres propulsives et propergols pour fusées - Partie 2 :
Détermination de la résistance à l'énergie électrostatique
Ta slovenski standard je istoveten z: prEN 13938-2
ICS:
71.100.30 Eksplozivi. Pirotehnika in Explosives. Pyrotechnics and
ognjemeti fireworks
oSIST prEN 13938-2:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13938-2:2021

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oSIST prEN 13938-2:2021


DRAFT
EUROPEAN STANDARD
prEN 13938-2
NORME EUROPÉENNE

EUROPÄISCHE NORM

April 2021
ICS 71.100.30 Will supersede EN 13938-2:2004
English Version

Explosives for civil uses - Propellants and rocket
propellants - Part 2: Determination of resistance to
electrostatic discharge
Explosifs à usage civil - Poudres propulsives et Explosivstoffe für zivile Zwecke - Treibladungspulver
propergols pour fusées - Partie 2 : Détermination de la und Raketentreibstoffe - Teil 2: Bestimmung der
résistance à l'énergie électrostatique Widerstandsfähigkeit gegen elektrostatische Energie
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 321.

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, Turkey 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13938-2:2021 E
worldwide for CEN national Members.

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oSIST prEN 13938-2:2021
prEN 13938-2:2021 (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 test sample . 7
7 Procedure . 7
8 Test report . 7
Annex A (normative) Sieving method . 8
Annex B (informative) Calibrating procedure for electrostatic discharge generator . 9
B.1 General. 9
B.2 Device to be tested . 9
B.3 Apparatus . 9
B.3.1 High Voltage probe with a calibrated high input impedance. . 9
B.3.2 Current probe or shunt . 9
B.3.3 Oscilloscope. Band width ≥ 100 MHz. For digital oscilloscope with a sampling at least
of 20 MS/s. . 9
B.4 Procedure . 9
B.4.1 Voltage and capacitor calibration . 9
B.4.2 Discharge circuit calibration . 10
B.4.3 Additional calibration in case of an additional series resistance . 11
B.5 Requirements for the generator. 11
Annex C (informative) Screening method for electrostatic discharge generator . 12
C.1 Material . 12
C.2 Procedure . 12
Annex ZA (informative) Relationship between this European Standard and the essential
safety requirements of Directive 2014/28/EU relating to the making available on the
market and supervision of explosives for civil uses aimed to be covered . 13
Bibliography . 14

2

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oSIST prEN 13938-2:2021
prEN 13938-2:2021 (E)
European foreword
This document (prEN 13938-2:2021) has been prepared by Technical Committee CEN/TC 321
“Explosives for civil uses”, the secretariat of which is held by UNE.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13938-2:2004.
In comparison with the previous edition, the following technical modifications have been made:
a) the normative references have been updated;
b) Clause 4, Principle, has been added;
c) Annex A, Range of applicability of the test method, has been removed;
d) Annex ZA has been updated.
This document has been prepared under a Standardization Request (M/562) annexed to the Commission
Implementing Decision C(2019)6634 final as regards Explosives for civil uses given to CEN by the
European Commission and the European Free Trade Association, and supports Essential Safety
requirements of Directive 2014/28/EU.
For relationship with Directive 2014/28/EU, see informative Annex ZA, which is an integral part of this
document.
EN 13938, Explosives for civil uses — Propellants and rocket propellants, is currently composed of the
following parts:
— Part 1: Requirements
— Part 2: Determination of resistance to electrostatic discharge
— Part 3: Determination of deflagration to detonation transition
— Part 4: Determination of burning rate under ambient conditions
— Part 5: Determination of voids and fissures
— Part 6: Solid rocket propellants — Guide for the determination of integrity of inhibitor coatings
— Part 7: Determination of safe and reliable ignition and complete deflagration of black powder
3

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oSIST prEN 13938-2:2021
prEN 13938-2:2021 (E)
1 Scope
This document specifies a method for the determination of resistance to electrostatic energy for
propellants containing a mass fraction of at least 5 % of particles which pass through a 1 mm sieve. This
method does not apply to black powder.
NOTE If the mass fraction of particles smaller than 1 mm size is less than 5 % the propellant is considered to
be insensitive to electrostatic energy and this test is not performed.
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.
prEN 13857-1:2021, Explosives for civil uses — Part 1: Terminology
ISO 565:1990, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal
sizes of openings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 13857-1:2021 and the
following apply.
3.1
reaction
occurrence of report, crackling, sparkling and/or flame
3.2
partial reaction
change of colour, opening of the cell or heat traces at the surface of the cell
4 Principle
Sudden and momentary electric current that flows in a sample at an electrical potential. During the
handling operation, the particles could charge and an electrostatic discharge might occur, posing a risk
of fire and explosion an also for people.
5 Apparatus
5.1 Cells and covers (see Figure 1). The cell consists of:
— a plastics disc, e.g. polyvinylchloride, thickness (3,0 ± 0,1) mm, diameter (32 ± 1) mm, with a centred
drilled hole, diameter (6,3 ± 0,1) mm;
— a copper disc, thickness approximately 1 mm, diameter (19 ± 1) mm, which forms the cell base.
The plastics disc is fixed to the copper disc by means of a bead of adhesive around the outer edge.
The cover consists of a copper disc, thickness approximately 0,1 mm, diameter (16 ± 1) mm which is fixed
to the upper part of the plastics disc by means of a double-sided adhesive tape.
4

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oSIST prEN 13938-2:2021
prEN 13938-2:2021 (E)
Dimensions in millimetres

Key
1 upper copper disc
2 plastics disc
3 lower copper disc
4 substance under test
5 adhesive bead
6 upper copper disc (cover)
7 plastics disc
8 lower copper disc (base)
9 double-sided adhesive tape
Figure 1 — Cell and cover
5

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oSIST prEN 13938-2:2021
prEN 13938-2:2021 (E)
5.2 Electrostatic energy supply (see Figure 2). The electrostatic energy supply consists of:
— generator capable of applying a 10 kV continuous voltage;
— three capacitors: capacitance 0,001 µF, 0,01 µF and 0,1 µF, each
...