Which type of strainers are prohibited for use in the fuel oil system?

Inline or cone strainers are prohibited for use in the fuel oil system primarily due to the potential for clogging and the design of these strainers, which may not adequately allow for the maintenance of fuel flow and system integrity. In fuel oil systems, consistent fuel flow is critical for reliable engine operation, and any device that might restrict flow or become easily clogged can lead to operational issues, such as starvation of the engine or damaging components.

Other types of strainers, like basket strainers and Y-type strainers, are designed to allow for easier maintenance and cleaning, thus ensuring that they can handle larger volumes of particulate matter without significantly impeding the fuel flow. Woven mesh strainers, while they serve a similar purpose, are generally used in applications where a finer filtration is necessary but still allow for efficient cleaning.

The prohibition of using inline or cone strainers emphasizes the importance of maintaining an uncluttered and efficient fuel delivery system, which is crucial for safe and effective operation of machinery reliant on fuel oil.