UL 8-2016 pdf download

UL 8-2016 pdf download.Water Based Agent Fire Extinguishers.
9 Caps, Valves, Closures, and Pressure Relief
9,1 The inside diameter of a fill opening ot a rechargeable-type extinguisher shall be:
a) A mInimum 19 mm (3)4 In) for an extinguisher having a capacity of 19 L (5 gal) or less;
Exception: For coated cylinders, a mrnimuin 38 mm (1.1./2 n) fill opening is required.
b) A minimum 64 mm (2-1/2 in) for an extinguisher having a capacity above 19 L (5 gal).
9.2 A collar with external threads shall be constructed so that the cap does not contact the dome or the
bottom when the gasket is removed.
9.3 A threaded cap, closure, or valve shall engage the collar or the threaded opening by not less than
four full threads with the gasket in place.
9.4 A cap, plug, or other component, except a pressure gauge or indicator, shall be provided with a means of relieving pressure when it is removed while the agent chamber is still under pressure. The pressure shall be relieved with a minimum of two threads engaged.
9.5 Closures of rechargeable extinguishers shall resist, without evidence of damage to the threads, a closing torque of 35 N’m (25 lbf4t).
9.6 When pressure relief is required under the jurisdiction of the Department of Transportation (DOT) or
Canada Transportation of Dangerous Goods Regulations (TDGR). it shall be in accordance with the
Compressed Gas Association pamphlet CGA S•1 .1 Pressure Relief Device Standards.
10 Gaskets and ‘0” rings
10.1 A gasket or an O” ring shall be retained In a recess or the equivalent, in the cap, collar, or valve.
A gasket or an ‘0” ring of a rubber-like material shall be of thickness to provide a compression-type seal
and shall fit snugly against the cap or head. See Elastomeric Parts Test. Clause 45.
11 Gas Cartridges, Cylinders, and Regulators
11.1 A gas cartridge and a cylinder under the jurisdiction of the Department of Transportation (DOT) or Canada Transportation of Dangerous Goods Regulations (TDGR) shall be constructed, tested, marked, and charged in accordance with the applicable shipping container specifications of the DOT or TDGR.
11.2 A gas cylinder assembly shall be provided with a pressure-relief device as required by applicable DOT or TDGR regulations. A gas cylinder assembly not under the jurisdiction of the DOT or the TDGR shall be provided with a pressure relief appropriate for the cylinder used.
11.3 Gas cartridges shall be provided with an anti-recoil cap for use in storage and transit,
11.4 Gas cartridges or cylinder assemblies shall be securely attached to the extinguisher.
12.7 The pressure gauge shall be marked according to the following, as applicable. using a line extending as wide as, and of the same stroke thickness as, the manufacturer’s identifying mark:
a) To indicate galvanic compatibility with aluminum valve bodies — a horizontal line above the manufacturer’s identifying mark.
b) To indicate galvanic compatibility with brass valve bodies — a horizontal line below the manufacturers identifying mark.
C) To indicate galvanic compatibility with aluminum and brass valve bodies — a line above and a line below the manufacturer’s identifying mark, or the manufacturer’s identifying mark by itself without additional lines.
12.8 A cartridge-operated wheeled extinguisher provided with an expellant gas cylinder shall be provided with a gauge capable of indicating cylinder pressure whether the valve is open or closed. The gauge shall comply with the Standard for Gauges, Indicating Pressure for Compressed Gas Service. UL 404.
13 Puncturing Mechanisms
13.1 The parts of a puncturing mechanism, with the exception of unexposed springs and pins, shall be made of nonferrous metal or corrosion•resistant stainless steel.
14 Tamper Indicators and Locking Devices
14.1 The operating mechanism(s) Of an extinguisher shall be provided with a locking pin or other device to reduce the risk of unintentional discharge. A locking device shall be made of corrosion-resistant material. See Salt Spray Corrosion Test, Clause 46.
14.2 The locking pin or other device shall be visible from the front of the extinguisher when the extinguisher is mounted on a wall in its bracket or on its mounting hook. However, the locking pin is able to be on the back side when plctograplilc operating instructions on the front illustrate the intended means of operation.
14.3 When the locking device is attached to the valve with a chain or similar device, the chain shall be attached so that it does not interfere with the discharge stream.
14.4 A tamper indicator such as a seal or the equivalent shall be made of a corrosion resistant material and shall be provided to retain the locking device and to indicate tampenng with or use of the extinguisher See 28.1.