Standard
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AS 4839-2001
[Current]The safe use of portable and mobile oxy-fuel gas systems for welding, cutting, heating and allied processes
Specifies requirements for the selection of safe oxy-fuel gas hand-held or portable equipment used in welding, cutting, heating and allied processes. This Standard also details the safe operation and maintenance of this type of equipment. It applies to portable or mobile gas cylinders, inclusive of manifolded packs of cylinders. Reticulated systems and fixed piping, together with equipment, such as permanently mounted flame-cutting machines, are not intended to be covered by this Standard.
Published: 28/09/2001
Pages: 18
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope
2 Referenced documents
3 Definitions
4 Gases (some properties)
4.1 General
4.2 Oxygen
4.3 Acetylene
4.4 LP Gas (liquefied petroleum gas), propane, butane
4.5 Hydrogen
5 Gas cylinder storage and handling
5.1 General
5.2 Cylinders in use
5.3 Storage and segregation of cylinders
5.4 Cylinder transportation
5.5 Cylinder handling
5.6 Lifting cylinders
5.7 Cylinder valve seats and outlets
6 Equipment specification
6.1 General
6.2 Alternative construction
6.3 Portable manifolds or packs
6.4 Pressure regulators
6.5 Hoses
6.6 Blowpipes
6.7 Mixers and downstream attachments
6.8 Tips, nozzles and their attachment fittings
6.9 Safety devices
6.10 Cylinder trolleys
6.11 Personal safety wear
7 System assembly, flow capacity and safety devices
7.1 General
7.2 Fuel gas
7.3 Safety devices
7.3.1 General
7.3.2 Fitment of safety devices
7.3.3 Flashback arrestors at both hose ends (optimum protection)
7.3.4 Flashback arrestors at the blowpipe hose ends only
7.3.5 Flashback arrestors at the regulator hose ends and check valves at the blowpipe ends
7.4 Flow capacity and operating pressure
8 Leak testing and maintenance
8.1 Leak testing
8.1.1 General
8.1.2 Equipment connection
8.1.3 Leak testing procedure
8.1.3.1 Initial system pressurization
8.1.3.2 Specific test locations
8.1.3.3 Other possible sources of gas leaks
8.2 Maintenance
9 System operation
9.1 General
9.2 Pressurizing the system
9.3 System purging
9.4 Lighting up
9.5 Shutdown procedure
10 Safety instructions
10.1 General
10.1.1 Safety considerations
10.1.2 Operator safety
10.1.3 Operator workplace safety
10.1.4 Safe use of equipment
10.1.5 Tanks and containers operator safety
10.1.6 Confined spaces operator safety
10.2 Emergency procedures
10.2.1 General emergency procedures
10.2.2 Sustained backfire
10.2.3 Flashback/self-extinguishing backfire
11 Emergencies involving compressed gas cylinders
11.1 General
11.2 Actions common to all cylinders
11.3 Special actions for acetylene cylinders
Cited references in this standard
[Current]
Ruling to AS/NZS 1715:2009 Selection, use and maintenance of respiratory protective equipment
[Current]
Flashback arresters — Safety devices for use with fuel gases and oxygen or compressed air
Content history
AS 4839-2001 Rec:2016
DR 00394
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