Lock-out
A safety shut-down condition of the limiter, such that a restart can only be accomplished by a manual reset of the limiter or by a manual reset of the safety logic and by no other means. This will be achieved by a competent operator taking account of the physical situation. Suitably trained persons who are responsible for undertaking maintenance on the plant.
Maintenance personnel
Manned
A boiler operator is on-site during hours of boiler operation.
MAP
Maximum allowable pressure
Off-site monitoring
An off-site location with direct links to the boiler controls and alarms, where monitoring takes place. A competent boiler operator attends site to carry out checks and is available to attend site at all other times.
On-site Owner
Physical presence on-site, not necessarily in the boiler house.
‘Owner’ in relation to a pressure system, means the employer or self-employed person that owns the pressure system or: if he does not have a place of business I n Great Britain, his agent or: if there is no such agent; the user (Regulation 2, PSSR).
Redundancy The provision of more than one device or system which, in the event of a fault, will still provide the necessary facilities. Self-monitoring Regular and automatic determination that all chosen components of a safety system are capable of functioning as required. Shell boiler In a shell boiler, hot gases pass through the furnace and tube banks, the heat from the hot gases transfer via convection through the tubes and conduction into the water within the boiler shell. Also known as fire tube boiler, shell and tube boiler, package steam boiler, smoke tube boiler.
SOL
Safe operating limit.
Steam generator
Steam is made in a coiled tube surrounded by products of combustion. No perceptible water level in the tube. The user of a pressure system - the employer or self-employed person who has control of the operation of the pressure system Dynamic shock loading resulting from the accumulation of condensate in steam pipework.
User
Water-hammer
WSE
Written Scheme of Examination.
BG01 Guidance on the safe Operation of Steam Boilers Edition 2 – © 2019
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