How often is the pressure gauge tested? What needs compulsory verification
JJG49-2013 Verification Regulation of Precision Pressure Gauges, once a year; JJG 52-2013 elastic element type general pressure gauge, pressure vacuum gauge and vacuum gauge shall be verified once a half year; Mandatory verification range of pressure gauge: measurement of main cylinder and feed water pressure of boiler. Pressure measurement of fixed air compressor air chamber and header.
Pressure gauge (English name: pressure gauge) refers to an instrument that uses elastic elements as sensitive elements to measure and indicate the pressure higher than the ambient pressure. It is widely used and almost covers all industrial processes and scientific research fields. It can be seen everywhere in heat pipe network, oil and gas transmission, water and gas supply system, vehicle maintenance shop, etc.
Especially in the process of industrial process control and technical measurement, mechanical pressure gauges are more and more widely used because of their high mechanical strength and convenient production.
There are many types of pressure gauges. They are not only general (ordinary) pointer indicating type, but also digital type; There are not only conventional type, but also special type; Not only contact type, but also remote type; There are not only vibration resistant types, but also earthquake resistant types; There are not only diaphragm type, but also corrosion resistant type.
The pressure gauge series is complete. It has not only conventional series, but also digital series; There are not only ordinary media application series, but also special media application series; There are not only switch signal series, but also remote signal series, which are all derived from practical needs and have formed a complete series. The specifications and models of pressure gauges are complete, and the structural types are complete.
