Transportation in enclosed systems Flashcards
In piped systems, are flammable liquids supplied by metered pumps rather than being gravity fed?
In piped systems flammable liquids should be supplied by metered pumps and not be gravity fed.
Are pumps appropriately rated for the zone in which they are installed?
Pumps should be appropriately rated for the zone in which they are installed (see 10.1 and 10.3).
Are pipes constructed of steel or stainless steel or approved by recognised standards; are they clearly labelled and/or colour coded and marked with arrows to indicate the direction of flow?
Pipes should normally be of steel or stainless steel or be approved by recognised standards. They should be clearly labelled and/or colour coded (ref 42), marked with arrows to indicate the direction of flow and with any additional marking to indicate a hazard as necessary. The marking should especially be done near to the most hazardous points such as joints or valves. The emergency cut off valves should also be clearly signed.
Are the imposed loads taken into account when pipes are buried and appropriate measures, including installing on a bed of compacted material and covering suitably, taken to protect such pipes?
The imposed loads should be taken into account when pipes are buried and
appropriate measures, including installing on a bed of compacted material and
covering suitably, should be taken to protect such pipes. Two or more levels of
pipes in a single trench should be separated vertically by at least 150mm of well
compacted backfill.
Are loads considered when designing support systems for pipelines above ground level?
Similarly, loads should be considered when designing support systems for pipelines above ground level.
Are pipework systems electrically bonded and earthed?
Pipework systems should be electrically bonded and earthed (see ref 34)
Are quick-action shut-off valves, provided at the dispensing point, to guard against spillage?
Quick-action shut-off valves should be provided at the dispensing point, to guard against spillage
In addition to local shut-off valves are emergency stops provided to turn off pumps and close valves installed at the most remote point, ideally at the source of the supplies?
In addition to local shut-off valves, to ensure that under fire conditions supplies are isolated in the most effective manner, emergency stops should be provided to turn off pumps and to close valves installed at the most remote point, ideally at the source of the supplies.
Has consideration been given to interlocking the emergency stops to operate automatically in the event of any alarm arising from the operation of manual or automatic fire alarm systems and sprinklers?
Consideration should be given to interlocking the emergency stops to operate
automatically in the event of any alarm arising from the operation of manual or
automatic fire alarm systems and sprinklers. In addition, the pumps should be
isolated and the remotely located valves closed out of working hours.
Has it been ensured that no pipe carrying flammable or highly flammable liquid passes through any ducting or hazardous areas such as transformer rooms where it could be exposed to excessive heat or corrosion?
No pipe carrying flammable or highly flammable liquid should pass through any
ducting or hazardous areas such as transformer rooms where it could be exposed to excessive heat or corrosion
Are pipe runs kept as short as possible with directional changes kept to a minimum?
Pipe runs should be kept as short as possible with directional changes kept to a
minimum
Where flexible pipes have been used in areas of vibration, are these designed so that the possibility of the diameter of the pipe being restricted by kinking or a similar process is avoided?
Flexible pipes can be used in areas of vibration. These should be designed so that the possibility of the diameter of the pipe being restricted by kinking or a similar process is avoided. Flexible pipes should be kept as short as possible and should be electrically bonded and pressure tested annually.
Where practicable, are welded joints, rather than flanges, installed to reduce the possibility of leaks?
Where practicable, welded joints are preferred over flanges to reduce the possibility of leaks. Where welding is not practical, pipes should be flanged, threaded or mechanically attached so that the mechanical strength of the joint will not be impaired if exposed to fire
