Who has safety technical supervision procedures for safety valves?

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

The safety technical supervision procedures of the safety valve are as follows:

1. Regulations for the Safety and Technical Supervision of Steam Boilers promulgated by the Boiler and Pressure Vessel Supervision Bureau of the State Bureau of Quality Supervision

Article 146 "The safety valve of the boiler in use shall be calibrated at least once a year. The calibration of the safety valve should generally be carried out under the operating condition of the boiler. ”

2. Regulations for the Supervision of Boilers and Pressure Vessels in the Electric Power Industry (DL612-1996) promulgated by the Ministry of Electric Power Industry

9 1 13 After the installation and overhaul of the boiler and the overhaul of the safety valve, the starting pressure of the safety valve should be verified. In addition to mechanical calibration, the solenoid safety valve with electromagnetic auxiliary operating mechanism should also do the remote operation test of the electrical circuit and the operation test of the automatic circuit pressure relay.

Pure mechanical spring-loaded safety valve can be calibrated and adjusted by hydraulic installation and pure setting, which is generally carried out at 75% 80% rated pressure. After the safety valve adjusted by the hydraulic device, the actual starting seat review of the safety valve with the lowest starting value should be carried out at least per mu.

9 1 14 The safety valve should be tested regularly. The test interval of the boiler safety valve is not greater than a minor repair interval. The electrical circuit test of the solenoid safety valve should be carried out once a month. The safety valves of various types of pressure vessels shall be tested at least once a year.

9 1 15 It is forbidden to disconnect the safety valve during boiler operation.

9 1 16 The boiler without the calibration of the safety valve shall have strict measures to prevent overpressure in the process of ignition and safety valve calibration, and shall be implemented under the supervision of special personnel. During the calibration of the safety valve, the calibration personnel shall not evacuate the scene halfway.

The safety technical supervision regulations of the safety valve stipulate that the name plate should be fixed in the safety valve and the sign must be hung after the inspection. According to TSG ZF001-2006 "Safety Valve Safety Technical Supervision Regulations" Annex E: E4 Calibration Records, Seals and Reports The calibration of safety valves shall be recorded, sealed and reported in accordance with the following requirements:

1) During the calibration process, the calibration personnel need to record the relevant data of the calibration in time (see Appendix E 1); (2) After the verification of the safety valve of the qualified elimination of the sail, it is necessary to re-seal in time to prevent the state of adjustment from changing, and the seal is the code identification of the verification unit on one side, and the code identification of the verification personnel on the other side; (3) The seal must also be hung with a sign, which has the name and code of the calibration agency, the calibration number, the installed equipment number, the setting pressure and the date of the next calibration and hail inspection; (4) The safety valve that has passed the calibration shall be issued according to the calibration record (see Appendix E 2), and shall be issued according to the requirements of the quality management system of the calibration agency. Go hungry.

It is TSG ZF001-2006 "Safety Valve Safety Technical Supervision Regulations", specifically Article 1 and Appendix E.

When the steam pressure is lower than the specified value, the steam force is lower than the force of the spring, so that the valve is closed. When the steam pressure rises to exceed the specified value, when the steam force under the spool exceeds the spring force on the spool, the steam is pushed open and the steam is discharged, so that the steam pressure drops. The opening pressure value can be adjusted by changing the force of the spring on the valve core by using the adjustment screw.