Since the year 2000 it is now a legal requirement to have all pressurised vessels inspected every 13 months. Ideally we advise every 12 months with the extra months grace for any crossover, thus guaranteeing you can produce a valid certification of inspection if needed.
Generally we advise to carry out the boiler safety examination at the same time as the annual service to prevent any further unneeded machine downtime due to routine maintenance.
What does the inspection involve ?
Its carried out to confirm several factors which include the following. Internal inspection of the steam tank to check for any flaws or cracks in the steam boiler/weld on the tank, check for excessive scale build up: as scale is an insulator and this can generate hot spots on the tank which in turn could cause failure. Finally to check the operation of the safety valve as under fault conditions this needs to operate at a certain pressure level to remove all excessive steam pressure build up.
You can find out more information from the HSE by clicking the link below