Bsi bs en 13763 5 2003 (2004)

BRITISH STANDARD BS EN 13763 5 2003 Incorporating Corrigendum No 1 Explosives for civil uses — Detonators and relays — Part 5 Determination of resistance to cutting damage of leading wires and shock t[.]

BRITISH STANDARD BS EN

13763-5:2003

Incorporating Corrigendum No 1

Explosives for civil

uses — Detonators

and relays —

Part 5: Determination of resistance to

cutting damage of leading wires and

shock tubes

The European Standard EN 13763-5:2003 has the status of a

British Standard

ICS 71.100.30

12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:

This British Standard, was

published under the authority

of the Standards Policy and

Strategy Committee on

19 November 2003

© BSI 22 January 2004

ISBN 0 580 42934 2

National foreword

This British Standard is the official English language version of

EN 13763-5:2003

The UK participation in its preparation was entrusted to Technical Committee CII/61, Explosives for civil uses, which has the responsibility to:

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 its correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

— 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

Summary of pages

This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover

The BSI copyright notice displayed in this document indicates when the document was last issued

Amendments issued since publication

14985

Corrigendum No 1 22 January 2004 Correction to part number on front

cover

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 13763-5

November 2003

ICS 71.100.30

English version

Explosives for civil uses - Detonators and relays - Part 5:

Determination of resistance to cutting damage of leading wires

and shock tubes

Explosifs à usage civil - Détonateurs et relais - Partie 5:

Détermination de la résistance du fil d'amorçage et du tube

à transmission d'ondes de choc aux dommages par coupes

Explosivstoffe für zivile Zwecke - Zünder und Verzögerungselemente - Teil 5: Bestimmung der Widerstandsfähigkeit von Zünderdrähten und Zündschläuchen gegen Schnittbelastung

This European Standard was approved by CEN on 7 September 2003.

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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2003 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members.

Ref No EN 13763-5:2003 E

Foreword 3

Introduction 5

1 Scope 5

2 Normative references 5

3 Terms and definitions 5

4 Apparatus 5

5 Test pieces 8

6 Procedure 9

7 Test report 9

Annex A (informative) Range of applicability of the test method 10

Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives .11

EN 13763-5:2003 (E)

3

Foreword

This document (EN 13763-5:2003) has been prepared by Technical Committee CEN/TC 321 "Explosives for civil uses", the secretariat of which is held by AENOR

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 May 2004, and conflicting national standards shall be withdrawn at the latest by May 2004

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 the relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard

This European Standard is one of a series of standards with the generic title Explosives for civil uses – Detonators and relays The other parts of this series are listed below:

prEN 13763-1 Part 1: Requirements

EN 13763-2 Part 2: Determination of thermal stability

EN 13763-3 Part 3: Determination of sensitiveness to impact

EN 13763-4 Part 4: Determination of resistance to abrasion of leading wires and shock tubes

EN 13763-6 Part 6: Determination of resistance to cracking at low temperatures of leading wires

EN 13763-7 Part 7: Determination of the mechanical strength of leading wires, shock tubes, connections,

crimps and closures

EN 13763-8 Part 8: Determination of resistance to vibration of plain detonators

EN 13763-9 Part 9: Determination of resistance to bending of detonators

EN 13763-11 Part 11: Determination of resistance to damage by dropping of detonators and relays

EN 13763-12 Part 12: Determination of resistance to hydrostatic pressure

prEN 13763-13 Part 13: Determination of resistance of electric detonators against electrostatic discharge

prEN 13763-15 Part 15: Determination of equivalent initiating capability

prEN 13763-16 Part 16: Determination of delay accuracy

prEN 13763-17 Part 17: Determination of no-fire current of electric detonators

prEN 13763-18 Part 18: Determination of series firing current of electric detonators

prEN 13763-19 Part 19: Determination of firing impulse of electric detonators

EN 13763-20 Part 20: Determination of total electrical resistance of electric detonators

prEN 13763-21 Part 21: Determination of flash-over voltage of electric detonators

prEN 13763-22 Part 22: Determination of capacitance, insulation resistance and insulation breakdown of leading

wires

EN 13763-23 Part 23: Determination of the shock-wave velocity of shock tubes

EN 13763-24 Part 24: Determination of the electrical non-conductivity of shock tubes

prEN 13763-25 Part 25: Determination of transfer capability of surface connectors and coupling accessories

prEN 13763-26 Part 26: Definitions, methods and requirements for devices and accessories for reliable and safe

function of detonators and relays

CEN/TS 13763-27 Part 27: Definitions, methods and requirements for electronic initiation systems

Annex A is informative

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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom

EN 13763-5:2003 (E)

5

Introduction

During usage on site, the insulation on the leading wires of electric detonators and the plastic tubing of shock tube

to be used in non-electric detonator assemblies can be subjected to cutting forces when drawn over a sharp edge

In the former, the plastics material is worn away gradually by abrasion to cause failure of the insulation or tubing In the latter, the sharp edge cuts directly into the material This standard deals with the latter case by determining the ability of leading wire insulation/shock tube to resist the cutting forces likely to be experienced in normal use

1 Scope

This European Standard specifies a method for determining the resistance to failure of the plastic materials used in insulation of leading wires of electric detonators, or the tubing of shock tube non-electric detonators, when drawn over a sharp edge under specified loading conditions

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 13857-1:2003; Explosives for civil uses – Part 1: Terminology

EN ISO/IEC 17025; General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:1999)

3 Terms and definitions

For the purposes of this European Standard, the terms and definitions given in EN 13857-1:2003 apply

4 Apparatus

4.1 Cutting damage apparatus

The cutting damage apparatus shall incorporate the basic principles shown in Figure 1 comprising the following components

4.1.1 Tungsten carbide edge, having a 90
cutting edge radiused to (0,07 ± 0,02) mm;

4.1.2 Pulley A, having a diameter of (43,0 ± 0,5) mm;

4.1.3 Pulley B, having a diameter of (33,0 ± 0,5) mm ;

4.1.4 Electric motor, with a gearbox capable of rotating pulley B at 0,125 0

+ 0,008

r/s and maintaining its final position when the power to the motor is switched off;

4.1.5 Electrical device, to detect when electrical contact is made between the conductor in the leading wire and

the cutting edge (see 4.1.1);

4.1.6 Spring balance, or similar alternative arrangement, capable of applying a gradually increasing force and

indicating its value

Dimensions in millimetres

Key

1 Spring balance

2 Tungsten carbide edge

3 Pulley A

4 Pulley B

5 Remaining shock tube/leading wire

6 Suitable attachment to shock tube/leading wire

7 (375
20) mm at start of test

8 Suitable attachment to shock tube/leading wire (remainder not shown)

Figure 1 – Principle of test apparatus

Figure 2 shows an example of an apparatus, with equivalent alternative arrangements for applying and recording the maximum value of applied force

EN 13763-5:2003 (E)

7

Dimensions in millimetres

Key

1 Internal radius 200 mm

2 Shock tube/leading wire

3 Tungsten carbide edge

4 Pulley A

5 Pulley B

6 Movable balance-weight of (860
10)g

7 Diameter (12
0,2) mm

8 Arm of a lever on steel with thickness of (8,5
0,2) mm

9 Protractor

10 Movable load

Figure 2 – Example of a test apparatus

4.2 Immersion test apparatus

Immersion test apparatus, as shown in Figure 3, comprising the following components:

4.2.1 Cylindrical bending rig, capable of bending and maintaining the test pieces of shock tube in a "U"-form with

a bending radius of (1,6 ± 0,1) times the diameter of the shock tube

4.2.2 Tank of water, deep enough to allow the cut portion of shock tube to be immersed to (0,50 ± 0,05) m.

Dimensions in metres

Key

1 Shock tube

2 Water

3 Cylindrical bending rig

4 Rod with a diameter equal to the diameter of the shock tube

5 Cut surface of shock tube on the outer radius

Figure 3 – Water tank and bending rig

4.3 Conditioning chamber, capable of maintaining the highest temperature claimed by the manufacturer within

± 2
C

5 Test pieces

5.1 Leading wires

Select 20 lengths of leading wire, each (3,0  0,5) m long, from 20 detonators of a specific type having the same leading wire type, composition and dimensions The test pieces can be selected from detonators, from which the pieces are cut, or from wires supplied by the manufacturer of the detonator If the detonator has twin wires they shall not be separated and shall be parallel and flat at testing

5.2 Shock tubes

Select 20 lengths of shock tube, each (3,0  0,5) m long, from 20 detonators of a specific type having the same shock tubing type, composition and dimensions The test pieces can be selected from detonators, from which the pieces are cut, or from shock tubes supplied by the manufacturer of the detonator

EN 13763-5:2003 (E)

9

6 Procedure

6.1 Conditioning

Condition the test pieces in the conditioning chamber (see 4.3) at the highest temperature claimed by the manufacturer within ± 2
C for at least 2 h prior to testing

6.2 Detonator leading wires

For each of the 20 test pieces attach one end of the leading wire to the spring balance and the other end to pulley

B (driven by the motor) so that it passes over the tungsten carbide cutting edge and pulley A, as shown in Figure 1

Carry out the test at the highest temperature claimed by the manufacturer within ± 2
C

Start the electric motor to draw the wire over the cutting edge and apply the gradually increasing load

When the spring balance or similar arrangement reads (7,0 ± 0,5) N stop the apparatus and remove the leading wires

Record whether there has been an electrical contact between the leading wire conductor and the tungsten carbide cutting edge

6.3 Shock tubes

For each of the 20 test pieces, attach one end of the shock tube to the spring balance and the other end to pulley B (driven by the motor) so that it passes over the tungsten carbide cutting edge and pulley A, as shown in Figure 1

Carry out the test at the highest temperature claimed by the manufacturer within ± 2
C

Start the electric motor to draw the shock tube over the cutting edge and apply the gradually increasing load

When the spring balance or similar arrangement reads (7,0 ± 0,5) N stop the apparatus and remove the shock tube It shall be cooled down to (20 ± 2)
C before inserting in the bending rig

Insert the shock tube into the bending rig so that the tube is bent into a ”U” shape with the cut surface is on the outer radius of the bend Put the shock tube and the bending rig into the tank of water so that the free ends are above the water and the cut surface is below the water at a depth of (0,50 ± 0,05) m (see Figure 3) Store for 24 h

at (20 ± 5)
C

After storing in the water, keep it in the bending rig, attach a witness paper to one end and attempt to initiate it in the other end within 1 h using the manufacturer’s recommended initiating device Record whether or not the tube initiates If the tube initiates, record with the witness paper whether or not it propagates along its entire length

7 Test report

The test report shall conform to EN ISO/IEC 17025 In addition the following information shall be given:

a) the test temperature;

b) for leading wires, the number of wires which had electrical contact before the test was completed;

c) the number of shock tubes that did not initiate after immersion in water;

d) the number of shock tubes that did not propagate along their entire length after immersion in water