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NEN EN 1127-1 : 2011

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
Withdrawn date

01-08-2019

Published date

12-01-2013

Foreword
0 Introduction
1 Scope
2 Normative references
3 Definitions and abbreviations
4 Hazard identification
    4.1 General
    4.2 Combustion properties
    4.3 Ignition requirements
    4.4 Explosion behaviour
5 Elements of risk assessment
    5.1 General
    5.2 Determining the amount and likelihood of an
          occurrence of an explosive atmosphere
          5.2.1 Degree of dispersion of flammable substances
          5.2.2 Concentration of flammable substances
          5.2.3 Amount of explosive atmosphere
    5.3 Determining the presence of effective ignition
          sources
          5.3.1 General
          5.3.2 Hot surfaces
          5.3.3 Flames and hot gases (including hot particles)
          5.3.4 Mechanically generated sparks
          5.3.5 Electrical apparatus
          5.3.6 Stray electric currents, cathodic
                  corrosion protection
          5.3.7 Static electricity
          5.3.8 Lightning
          5.3.9 Radio frequency (RF) electromagnetic
                  wave
          5.3.10 Electromagnetic waves
          5.3.11 Ionizing radiation
          5.3.12 Ultrasonics
          5.3.13 Adiabatic compression and shock waves
          5.3.14 Exothermic reactions, including self-ignition
                  of dusts
    5.4 Estimating the possible effects of an explosion
6 Elimination or minimisation of risk
    6.1 Fundamental principles
    6.2 Avoidance or reduction of the amount of explosive
          atmosphere
          6.2.1 General
          6.2.2 Process parameters
          6.2.3 Design and construction of equipment,
                  protective systems and components
    6.3 Classification of hazardous places
          6.3.1 General
          6.3.2 Zones for gases/vapours
          6.3.3 Zones for dusts
    6.4 Requirements for the design and construction
          of equipment, protective systems and components
          by avoidance of effective ignition sources
          6.4.1 General
          6.4.2 Hot surfaces
          6.4.3 Flames and hot gases
          6.4.4 Mechanically generated sparks
          6.4.5 Electrical apparatus
          6.4.6 Stray electric currents and cathodic
                  corrosion protection
          6.4.7 Static electricity
          6.4.8 Lightning
          6.4.9 Radio frequency (RF) electromagnetic
                  waves
          6.4.10 Electromagnetic waves
          6.4.11 Ionizing radiation
          6.4.12 Ultrasonics
          6.4.13 Adiabatic compression and shock waves
          6.4.14 Exothermic reactions, including
                  self-ignition of dusts
    6.5 Requirements for the design and construction of
          equipment, protective systems and components to
          reduce the explosion effects
          6.5.1 General
          6.5.2 Explosion-resistant design
          6.5.3 Explosion relief
          6.5.4 Explosion suppression
          6.5.5 Prevention of explosion propagation
                  (explosion decoupling)
    6.6 Provisions for emergency measures
    6.7 Principles of measuring and control systems for
          explosion prevention and protection
7 Information for use
    7.1 General
    7.2 Information on equipment, protective systems and
          components
    7.3 Information for commissioning, maintenance and
          repair to prevent explosion
    7.4 Qualifications and training
Annexes
A (normative) Tools for use in potentially explosive
atmospheres
B (normative) Relationship between categories and zones
C (informative) Concepts for the use of measuring and
control systems to avoid effective ignition sources
D (informative) Index
ZA (informative) Clauses of the European Standard
addressing essential requirements or other provisions
of EU Directives

Defines methods for the identification and assessment of hazardous situations leading to explosion and the design and construction measures appropriate for the required safety.

DevelopmentNote
Draft issued in December 2017. (12/2017)
DocumentType
Standard
PublisherName
Netherlands Standards
Status
Withdrawn

Standards Relationship
ONORM EN 1127-1 : 2011 Identical
DIN EN 1127-1:2011-10 Identical
EN 1127-1:2011 Identical
UNE-EN 1127-1:2012 Identical
NF EN 1127-1 : 2011 Identical
I.S. EN 1127-1:2011 Identical
NS EN 1127-1 : 2011 Identical
SN EN 1127-1 : 2012 Identical
UNI EN 1127-1 : 2011 Identical
BS EN 1127-1:2011 Identical

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