How is the pressure gauge ABC divided?

Answer:

Pressure gauges belong to the category of safety protection, which belong to strong inspection items. According to the JJG52-1999 test procedure, the cycle is half a year.Enterprises may, according to the specific circumstances used, determine the test cycle by A/B/C.Class A is compulsory test, which is related to production safety and environmental monitoring. The test cycle must be only less than half a year according to the verification regulations. If the conditions are bad, the verification cycle must be shorter.The B class should in principle not exceed the requirements specified in the verification regulations.The C class can determine the cycle of verification according to the characteristics of the enterprise, but there should be a square for determining the period of verification

1 when measuring the steady pressure, the normal operating pressure shall be 1/3 2/3 of the upper limit of the measuring range of the instrument,2 when measuring the fluctuating pressure (such as the pressure at the outlet of pumps, compressors and fans), the normal operating pressure shall be1/3~1/2 of upper limit of instrument measuring rangeThe normal operating pressure shall not exceed the upper limit of the instrument measuring range when the 3 sides are high and the pressure is greater than 4MPaValue of 1/2

Instrument certification according to the location of the importance of varying degrees, generally divided into a, B, C three grades.A class is generally used in pressure control strict locations, requiring accurate instructions, is the focus of monitoring instruments, usually for an annual or semiannual inspection;Class B is generally used at locations where pressure control is more stringent and requires more accurate instructions. It is a general monitoring instrument, usually tested annually or two years;Class C is generally used in places where the pressure control is not strict and can be used as a reference value. It is a non monitoring instrument, usually tested for many years or replaced after failure;