Is there a interval between major overhauls of pressure equipment?

During the major overhauls of pressure equipment, there are usually specified intervals. This interval can be determined based on the specific type of equipment, usage conditions, and relevant standards. Generally, the overhaul interval for pressure equipment depends on factors such as the equipment’s operating time, operating environment, and material composition. **The standard \"Code for Safety Inspection of Pressure Vessels\" (GB150) sets out certain requirements regarding the interval between major overhauls of pressure equipment. For example, pressure vessels commonly used in industrial production are required to undergo a routine inspection once a year, a major overhaul every 5 years, and a comprehensive inspection every 10 years. Different industries and enterprises may establish stricter requirements regarding the intervals between major overhauls to ensure the safe operation of equipment. Therefore, in practical applications, it is necessary to determine the overhaul interval based on the specific conditions of the equipment, and to comply with relevant safety standards and regulations. .

There are no specific time interval requirements; the maintenance timing and the extent of the maintenance (minor repairs, medium repairs, major repairs) are determined primarily based on the maintenance schedule for the equipment system and/or the condition of the equipment during regular upkeep.

Thank you all for your answers. In other words, for major repairs, priority should be given to the **mandatory standards**, followed by the company’s internal rules, and then the **recommended standards**. In other words, if replacing more than 100 meters of pipe at once is considered a major repair, then does failing to meet the internal company regulations regarding the interval between major repairs indicate that the company’s safety management level is compromised? And once the total length of pipe replaced during this period exceeds 100 meters, can further replacements be carried out; and even if the length of pipe replaced in a single instance is less than 100 meters, can it be determined whether supervision and inspection are necessary based on the reasons for the replacement? It seems like this problem is very complicated; I don’t understand much yet since I just got here

TSG21-2016 specifies this clearly, in 8.1.6.1 Inspection cycle for metal pressure vessels. The cycle is determined based on the safety level assessed in each regular inspection.

Don’t talk nonsense; there are no standard requirements specified for maintenance work.