AS 3814:2015 pdf download.Industrial And Commercial Gas-Fired Appliances.
Explosions are the main hazard on the firing side of the equipment covered by this Standard, the basic cause being ignition of a combustible mixture in the combustion chamber or associated ductwork. The magnitude and intensity of the explosion will depend on both the quantity of combustibles present and the proportion of air with which the combustibles are mixed.
Explosions could be the result of one or more of the Ibilowing:
(a) Improper design of equipment or control systems.
(b) Equipment or control system malfunction, including valve leakage.
(c) Interruption and restoration of gas or air supply causing loss of flame followed by delayed ignition of the resultant accumulation of a combustible mixture.
(d) Flame failure on a burner and subsequent ignition of the resultant accumulation of a combustible mixture.
The presence of a well-trained, reliable and competent operator provides a major contribution to safety.
AS 3814 provides minimum requirements for the design, construction and safe operation of Type B appliances that use any gas as a gaseous fuel to produce flame, heat, light, power or special atmosphere in any combination of these gases either together or with other fuels.
Construction requirements given relate only to matters affecting gas-firing or to any interconnection between the gas-firing system and the safety requirements of the appliance.
NOT1S:
I Additional information regarding safety principles for industrial appliances is given in
AS 1375.
2 Where an Australian design standard exists for an appliance and is not called up in this Standard, the OEM should confirm compliance to that Standard before installing (if no other authority exists).
AS 3814 does not cover all the requirements for the safety of the process carried out in the appliance. Other statutory and regulatory requirements might be applicable to the appliances or installations, or both, that fall within the scope of this Standard. It is the installer/original equipment manufacturer’s responsibility to ensure that appliances and installations comply with these requirements.
Installation requirements for appliances covered by this Standard are detailed in
AS/NZS 5601.1.
1.1.2 Exclusions from Standard
The following appliances are excluded from this Standard:
(a) Manually operated bunsen type burners.
(b) Simple atmospheric burners that are not fitted into a combustion chamber and burn in an open ventilated space under the control of an operator.
(c) Petroleum, petrochemical and natural gas industries flares for general refinery and petrochemical service complying with ISO 25457 and ISO 23251.
(d) Petroleum and natural gas industries pressure-relieving and depressurizing systems complying with ISO 23251.
(e) Engines other than stationary engines.
(f) Refrigeration systems that utilize gas as a refrigerant.
(g) Any vaporizing liquid fuel burners (refer to AS 1375).AS 3814 pdf download.