AS/NZS 2430.3.5:1997

1 - AS/NZS 2430.3.5:1997 CLASSIFICATION OF HAZARDOUS AREAS - EXAMPLES OF AREA CLASSIFICATION - REFINERIES AND MAJOR PROCESSING PLANT
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
6 - 3 DEFINITIONS
7 - 4 REFINERIES AND MAJOR PROCESSING PLANTS - HEAVIER-THAN-AIR GASES AND VAPOURS
7 - 4.1 Scope
7 - 4.2 Classification of hazardous areas
7 - 4.2.1 Extent of hazardous areas
7 - 4.2.2 Open air situations
8 - 4.2.3 Enclosed structures and surrounding areas
9 - 4.2.4 Open structures and surrounding areas
10 - 4.2.5 Enclosed structures with plenum of safe atmosphere
11 - 5 REFINERIES AND MAJOR PROCESSING PLANTS - LIGHTER-THAN-AIR GASES AND VAPOURS
11 - 5.1 Scope
11 - 5.2 Classification of hazardous areas
11 - 5.2.1 In closed systems within adequately ventilated refinery process areas
12 - 5.2.2 For adequately ventilated compressor structures
13 - 5.2.3 In closed systems within inadequately ventilated refinery process areas
14 - 5.2.4 For inadequately ventilated compressor structure

Provides guidance on the classification of areas associated with the production, processing, handling and storage of flammable liquids and gases, in refineries and major processing plants. It includes specific examples of classification for such areas, based on a generalized method of area classification. To be read in conjunction with AS/NZS 2430.3.1:1997.

This Standard provides examples of area classification for areas associated with the production, processing, handling and storage of flammable liquids and gases in refineries and major processing plants. It is part of the AS/NZS 2430 series which recommends the classification of several commonly occurring situations and should be read in conjunction with AS/NZS 2430.3.1.The examples shown in this Standard use a Generalized Method of area classification.For examples of area classification for flammable liquids and gases based on the Source of Release Method reference should be made to AS/NZS 2430.3.3 and AS/NZS 2430.3.4.NOTE: The classifications given in this Standard are based on the assumption that the installations are carried out in accordance with the relevant requirements of the authority having jurisdiction. In general, classifications in accordance with the following codes are acceptable, subject to any additional provisions or modifications as required by the authority:(a) Institute of Petroleum Model Code of Safe Practice in the Petroleum Industry,(b) API RP 500, Recommended practice for classification of locations for electrical installations at petroleum facilities - American Petroleum Institute,(c) BS 5908, Code of practice for fire precautions in the chemical and allied industries.

First published in Australia in part as part of AS 1076.2-1977.
AS 2430.1 first published 1981.
AS 1076.2-1977 and AS 2430.1-1981 revised, amalgamated and designated AS 2430.1-1982.
AS 2430.1-1982 revised and redesignated in part as AS 2430.3-1987.
Second edition 1991.
First published in New Zealand as part of NZS 6101P:1972.
Revised and redesiganted in part as NZS 6101.3:1991.
AS 2430.3-1991 and NZS 6101.3:1991 revised, amalgamated and redesignated in part as AS 2430.3.5:1997.