This Standard specifies requirements for liquefied petroleum gas (LP Gas) and compressed natural gas (CNG) fuel systems for engines mounted on industrial equipment, either for the propulsion of the equipment or for driving some auxiliary function, e.g. a mixer or a pump. It provides requirements for the design and construction of component parts, and for their installation in equipment, and for tests, commissioning and periodic inspection.The Standard applies to fixed installations, mobile and portable equipment such as forklifts, floor sweepers, polishers, tow tractors, elevating work platforms and industrial engines.NOTE: For installations to industrial stationary engines connected to a reticulated fuel supply, reference should be made to AS 3814 or AS/NZS 1596 for storage and handling or AS 5601 for gas installations.This Standard does not apply to other LP Gas or CNG usage, such as the gas supply system for appliances in caravans, mobile homes or for the propulsion of marine craft or passenger or commercial vehicles.This Standard does not apply to Liquefied Natural Gas (LNG) fuel supply systems.This Standard does not cover the areas where major structural modifications are to be carried out to the industrial equipment (major structural modifications are those not defined in Clause 1.6). Prior to commencement of such work, guidance should be sought from the equipment manufacturer or a professional engineer who is experienced in the relevant disciplines.

First published as AS 4983-2003.Second edition 2010. Originated as AS4983—2003. Second edition 2010.