What's the basis for the inspection of the safety accessories (safety valve and pressure gauge) of the simple pressure vessel?
(1) the maximum working pressure is greater than or equal to 0.1MPa; (note 1-2)(2) the product of work pressure and volume is greater than or equal to 2.5MPa = L; (note 1-3)(3) liquid containing gas, liquefied gas and the highest working temperature is higher than or equal to its standard boiling point.The accessories of the pressure vessel that meet the above requirements need to be checked.
I also encountered this problem, online search an article of the following content, should be able to answer your questions. Simple pressure vessel safety valve inspection cycle, in January 22, 2007, the State Administration of quality supervision promulgated the "simple Pressure Vessel Safety Technology Supervision Regulations" (TSG R0003-2007), since July 1, 2007. Article forty-third of this regulation states that the unit is responsible for the safety management of the simple pressure vessel. A simple pressure vessel that meets the requirements of this procedure does not require registration. A simple pressure vessel within the recommended service life shall not be subject to periodic inspection in accordance with the periodic inspection rules for pressure vessels. At the same time, clause fourth (four) of this code states that safety accessories such as safety valves, bursting discs, pressure gauges, water level gauges, temperature measuring instruments and other safety accessories are also applicable. It can be concluded that simple pressure vessels manufactured after July 1, 2007, the safety valve is not required to regularly check. When the simple pressure vessels to use life, such as the need for continued use, you should be in accordance with the regulations of article forty-fifth, on the basis of "Pressure Vessels Periodical Inspection Regulation" (TSG R7001-2004) to check the safety valve in the provisions for regular inspection.
The operation pressure adjustment of the safety valve directly affects the safety and economy of the boiler operation. If the safety valve pressure adjustment is too large, a lot of pressure exceeds the working pressure safety valve still moves, so prone to overpressure hazards; on the contrary, if the safety valve pressure adjustment pressure is too low, slightly greater than the working pressure, the safety valve on the action or steaming, and frequent moves, the safety valve the valve seat wear and steaming have impact on the economy. Therefore, do a good job safety valve adjustment, constant pressure work is very important.In order to ensure the boiler's safety and economic operation, the safety valve of each part of the boiler must be adjusted to the required operating pressure. That is, once the boiler for some reason, due to overpressure to a certain extent, the safety valve will automatically open, this pressure is called the action pressure of the safety valve.Safety valve action pressure should be in accordance with the "steam boiler safety technology supervision regulations," the implementation of the regulations.The constant pressure of the safety valve shall be based on the pressure gauge on the drum (drum). When adjusting, the opening pressure shall be adjusted first, and then the safety valve with lower opening pressure shall be adjusted in turn.
