AS/NZS 2022:2003 pdf – Anhydrous ammonia-Storage and handling

AS/NZS 2022:2003 pdf – Anhydrous ammonia-Storage and handling.
(a) An actuated-fail-closed shut off valve shall be fitted to the liquid line downstream of the manual shut off valve fitted in accordance with Clause 3.5.
(b) ESD stations shall he located at each loading bay or control panel and at the exit gates of the storage depot. or similar locations.
(C) A link shall be provided so that in the event of activation of the ESD system, the internal self-closing (ISC) valve on any tanker or nurse tank greater than II m capacity shall close at the same time as the storage tank shut off valve.
The ESD system shall be designed to fail to a safe condition.
2.17 DRIVE-AWAY PROTECTION
When filling or discharging at static storage tanks, a drive-away protection system shall be fitted to road tank vehicles to ensure that they cannot he moved when transfer hoses or loading arms are connected.
The minimum requirement for drive-away protection shall be as follows:
(a) Vehicles fitted with air-activated brakes shall incorporate a brake interlock system that prevents the spring brakes from being released while hoses or a loading arm are still attached.
(b) 1-loses and loading arms at static storage tanks used to transfer anhydrous ammonia to and from vehicles other than those covered by Item (a) shall be fitted with breakaway couplings. Fixed piping associated with breakaway couplings shall be sLipported to ensure the correct activation of the couplings.
2.18 SAFETY EQUIPMENT
Any safety equipment prescribed in this Standard for specific types of systems shall comply with the following requirements:
(a) A face-shield shall provide protection to all the face but shall be worn only as secondary eye protection. Gas tight goggles or chemical goggles shall provide primary eye protection.
(b) Chemical splash goggles shall be flexible fitting and designed to provide primary protection to the eyes and eye socket from the splash of hazardous liquids. Direct- vented goggles do not comply with this requirement.
(c) A gas filter respirator shall have a half-face piece or a full-face piece and a filter contained in a renewable canister, sufficient to provide protection against low concentrations of anhydrous ammonia for a limited period. Gas tight goggles or chemical-splash goggles shall he used with a half-face piece respirator.
(d) Gauntlet gloves shall have separate fingers and thumb. shall protect hands and forearms, and shall be made of rubber or plastic impervious to anhydrous ammonia.
(e) Thermal gloves shall have sufficient insulation to prevent injury resulting from contact with components at a temperature of 0°C.
(1) Protective clothing shall consist of normal work clothing that can be buttoned up at the srist and throat to provide some skin protection in low ammonia concentrations.