English to Spanish Tech/Engineering Engineering: Industrial Boiler maintenance and op

Source text:

It is essential that regular checks are made to ensure scale build-up is not taking place within the boiler. Such checks will ensure that water treatment being applied to the boiler water feed is effective.

The lower hand hole doors should be removed after one month and the interior of the boiler thoroughly examined. If scale or sludge build-up is observed, a water treatment specialist should be consulted.

Subsequent interior examinations should be carried out on a regular.

Me gustaría confirmar también si hay alguna diferencia entre handhole y manhole, como en:

All steam pipe work, valves and fittings will be very hot. Do not operate the safety valve without protection.

Check the *hand holes* and *man holes* for signs of leakage. This is particularly important when the boiler is started from new or when gaskets have been replaced (refer to the Section for fitting procedures for new gaskets).