AS 2927 pdf download

AS 2927 pdf download.The storage and handling of liquefed chlorine gas
1.1  Scope
This Standard sets out requirements and recommendations for the safe storage and handling of liquefied chlorine gas in sites where chlorine is used, e.g. water treatment facilities and sites where chlorine containers are stored e.g. transport depots. It also provides requirements and recommendations for vaporizers, chlorinators and other parts of systems in which chlorine is reticulated and distributed. NOTE 1  Physical and chemical data for chlorine is provided in Appendix A. NOTE 2  The hazardous properties of chlorine are discussed in Appendix B. For the purposes of this Standard, quantities are expressed in kilograms (kg). This Standard is written for end users in water treatment in particular; however, parts of the Standard will apply to other end users.
1.2  Application
Australian and Australian/New Zealand Standards are voluntary. They do not include contractual, legal or statutory requirements. Voluntary Standards do not replace laws with which users of Standards are understood to comply and which take precedence. NOTE  Refer to the National Construction Code (NCC) for all matters relating to building works. This Standard does not apply to — (a) manufacture of chlorine gas and associated storage of containers at these sites; (b) chlorination of swimming pools by means of powders or liquids, e.g. calcium hypochlorite, isocyanurates or sodium hypochlorite solution; (c) transport of liquefied chlorine gas, which is covered by other rules and codes, e.g. the ADG Code; (d) handling and transport of chlorine in port areas which, in Australia, is covered by AS 3846.
1.5  Terms and definitions
For the purpose of this document, the following terms and definitions apply. 1.5.1 automatic shut-off device ASD emergency shut-off devices automatic shut‑off devices are risk mitigation devices which are attached to drum or cylinder valves, intended to stop chlorine leaks by closing off the container valve 1.5.2 authorized authorized by the legal occupier of the installation 1.5.3 canister respirator filtration type escape respirator respiratory device incorporating filters which remove certain particles and gases or vapours from the air being inhaled by the wearer for a limited period, e.g. during escape from a respiratory hazard 1.5.4 capacity total internal volume of the receptacle at a temperature of 15 °C, expressed in litres Note 1 to entry: The capacities of typically used cylinders and drums in Australia are: (a) Drums 920 kg: 789 L or 731 L, depending on the design (see Appendix D). (b) Cylinders 70 kg: 59 L. (c) Cylinders 33 kg: 29 L. 1.5.5 chlorinator piece of equipment that regulates the flow of chlorine gas into the user system, e.g. swimming pool, sewage effluent 1.5.6 chlorine elemental chlorine in its gaseous or liquid form 1.5.7 commercial (land use) is deemed to include — (a) sports grounds and entertainment venues; (b) industrial land uses; (c) a factory, workshop, office, store, warehouse, shop, or building where people who are not associated with the operation of the chlorine installation are employed; (d) a ship lying at permanent berthing facilities; and (e) any storage facility for dangerous goods that exceeds minor storage quantities and is outside the property boundary of the installation 1.5.8 container anything in which the chlorine is wholly or partly contained, including cylinders, drums, road tank vehicles and tanks 1.5.9 containment vessel enclosed container designed to contain the drum or cylinder and associated pressure components and any pressure leak or release therefrom 1.5.10 cylinder rigid packaging which is designed in accordance with AS 2030.1 as a portable pressure vessel for the storage of chlorine and has only one cylinder valve, at one end, used for the withdrawal of chlorine gas 1.5.11 drum horizontal, cylindrical steel container having a water capacity of 150 L to 1 000 L and which can be fitted into a protective cradle for storage and transport Note 1 to entry: Drums are designed for either gas or liquid withdrawal and are not fitted with pressure relief devices. They have inverted‑heads (concave ends). If a drum is accidentally over‑pressured, the heads will reverse (become convex) or push out, providing an immediate visual indication of over pressurization. The reversed heads also provide additional capacity to reduce the pressure and provide valuable time for safety or corrective action. Note 2 to entry: Drums have two valves which, when vertically aligned above one another, permit gas to be drawn off from the upper valve and liquid chlorine to be drawn off from the lower valve. Note 3 to entry: Drums are classified as “Pressure Drums” in the ADG Code. Note 4 to entry: Further information on drum types and capacities can be found in Appendix D.