Standards Development

Scope

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

This is achieved by:

— risk assessment;

— risk reduction.

The iterative process of risk assessment and risk reduction is described in

Figure 1.Figure 1 — Iterative process of risk assessment and risk reduction

The safety of equipment, protective systems and components can be achieved by eliminating hazards and/or limiting the risk, i.e. by steps (Figure 2 below derived from EN ISO 12100 describes the process of Risk Assessment Process and risk reduction to describe the combination of efforts at design and use phase):

a) appropriate design (without using safeguarding or protective device) — Step 1;

b) safeguarding or protections — Step 2;

c) information for use — Step 3;

d) any other preventive measures.

In this document the measures in accordance with

1) (prevention) and

2) (protection) against explosions are dealt with in Clause 6.

3) The measures according to c) against explosions are dealt with in Clause 7.

4) Measures in accordance with d) are not specified in this document.

Refer to EN ISO 12100:2010 for complementary preventive and protective measures.

Figure 2 — Risk reduction: combination of efforts at design and use (workplace)

The preventive and protective measures described in this document will not provide the required level of safety unless the equipment, protective systems and components are operated within their intended use and are installed and maintained according to the relevant codes of practice or requirements.

This document specifies general design and construction methods to help designers and manufacturers in achieving explosion safety in the design of equipment, protective systems and components.

This document is applicable to any equipment, protective systems and components intended to be used in potentially explosive atmospheres, under atmospheric conditions. These atmospheres can arise from flammable/combustible substances processed, used or released by the equipment, protective systems and components or from materials in the vicinity of the equipment, protective systems and components and/or from the materials of construction of the equipment, protective systems and components.

This document is applicable to equipment, protective systems and components at all stages of its use.

This document is only applicable to equipment group II which is intended for use in other places than underground parts of mines and those parts of surface installations of such mines endangered by firedamp and/or combustible dust.

This document is not applicable to the design and construction of systems containing desired, controlled combustion processes, unless they can act as ignition sources in potentially explosive atmospheres.