Does the high-pressure limit alarm for liquefied hydrocarbon spheres need to be installed separately?
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SH3136 stipulates that liquefied hydrocarbon spheres should be equipped with a separate high-pressure alarm. The Sinopec Interim Provisions on Safety Technology Management for Liquefied Hydrocarbon Sphere Areas also state that the pressure alarm can be a pressure switch or an independent pressure transmitter. Under these rules, does the sphere require three pressure-related connections: an on-site pressure gauge, a remote pressure transmitter, and a high-pressure alarm? Can a single pipe connection be used for both the remote pressure gauge and the high-limit alarm, with the connection point connected to a tee to serve as inputs for both instruments?
The individual high pressure line alarm here refers to the remote pressure gauge. Remote pressure gauges and on-site pressure gauges cannot share the same opening; they must have separate openings, as required by SH3007.
Generally, two outlets are sufficient: one for local use and one for remote transmission