Document ID: chunk:federal_register_of_legislation:F2016L00417:body:0:p22
Version: federal_register_of_legislation:F2016L00417
Segment Type: other
Provision Reference: 
Character Range: 55737–58579

the plant.
A supplier must give this information to each person who receives the plant (which may be in the form of a manufacturer's manual).

Air compressors and blast pots

All valves should be of a rating equivalent to that of the pressure vessel and be correctly attached. A safety relief valve should be fitted on the compressor or air supply system and regularly checked. Further information on the design of pressure vessels can be found in AS/NZS 1200: Pressure equipment.

Blow-down procedures (if applicable), should be developed and implemented. Never exceed the rated working pressure as this may lead to explosion.
A muffler should be attached to blast pots to minimise the noise from escaping air when the machine is depressurised.

Portable blast pots should have wheels and be ergonomically designed.
Planned inspection and routine maintenance should be carried out by a competent person. Further information can be found in AS/NZS 378: Pressure equipment – In-service inspection, and the manufacturer's instructions.

Nozzle
Where dry blasting is being conducted, an efficient means for the discharge of static electrical charge from the blast nozzle and the object being blasted should be provided.
The nozzle lining and threads should be checked for wear and damage. Use nozzle washers,
and replace them when they show signs of wear.

Dead man controls (also known as fast acting automatic cut-off device)
Abrasive blasting equipment should be fitted with an automatic cut-off device (deadman control) near the blast nozzle so that it is under direct control of the nozzle operator to quickly stop the flow of abrasive material to the nozzle.
Dead man controls can be either pneumatic or electric. Pneumatic controls are only suitable for distances up to 40 metres because the response time increases with distance. Electric controls are recommended for distances over 40 metres as they respond almost instantly and response times do not increase with distance. Dead man controls are subjected to rough treatment because they are located at the nozzle which results in damage and rapid wear. Deadman controls (especially the lever and lever lock) should be inspected and tested several times each working day. Moving parts should be cleaned regularly to prevent jamming. You should also:
    * replace the rubber buttons and seals as necessary to prevent air escaping and abrasive from entering
    * inspect and clean control hose line fittings before connecting them to prevent dust and
      dirt clogging air passageways throughout the system which can damage control valve cylinder walls.
You should never modify, remove or substitute parts and never tape down or prevent free movement of the control handle. This defeats the safety purpose of the remote control system
and may cause serious injury if an uncontrolled