Preparing a data sheet for strainers which are located on the suction line of the fire water pumps. Should these strainers be temorary? In which code I can find information about strainers. Does anyone knows any source about strainers.
They can be of a butterfly valve temporary nature for start-up and commissioning, but those may be of a different mesh size than the permanent ones, which are usually changed out after comissioning has been completed.
For firewater pumps you would usually have a coarse strainer say 2mm bolt catcher upstream, you dont need any finer strainers as the pumps are built with fairly large clearances to make them robust
As per NFPA 20, the strainer shall be installed in the fire pump suction line where removal of the driver is required to remove rocks or debris from the pump impeller. Strainer shall be designed to restrict the passage of 7.9 mm sphere or as recomended by pump manufacturer.