Topic on regular major overhauls of imported equipment (fourth week of August)

It is still recommended to carry out maintenance on imported equipment according to the intervals specified by the manufacturer. Although the equipment can function properly without such maintenance, regular inspections help to extend its lifespan and ensure safety. If it is possible to send the equipment back to the factory for repair during a major overhaul, that’s definitely what should be done, especially for the core components ； The conditions and techniques for returning to the factory for repair still vary. If repairs can be carried out by a party other than the original manufacturer, it still depends on which part needs to be repaired; for core components, it is recommended to send them back to the factory for repair, as safety cannot be taken lightly.

Let me talk about the situation at our company: imported mechanical equipment requires a major overhaul every 3 years, while routine maintenance is carried out on a regular basis； The unit responsible for the major repair is the Chinese maintenance company designated by the original manufacturer of the unit!

For the first time, the manufacturer’s technical expertise can be utilized; the maintenance team of our unit will carry out the repairs following those guidelines. Thereafter, our own maintenance team can handle the repairs. For this to work, it is necessary that our maintenance team be well-prepared, especially in terms of technical data

The repair time back at the factory will likely be very long. For major repairs of imported equipment, I still recommend that the manufacturer’s staff be involved throughout the process to provide guidance, with the equipment’s own maintenance personnel handling the work

For imported equipment, the repair of its core components is usually carried out by the manufacturer or specialized repair agencies, while one’s own role is to handle the repair and maintenance of auxiliary devices.

For British-equipped units, even routine maintenance of the core components is not possible; a major overhaul is carried out every two years, with Britons coming to the factory to perform it. . . It’s really troublesome to feel constrained by others, especially when it comes to negotiating costs – there’s no way to discuss things, because in the end they insist on not giving in and you can’t do anything about it; after all, you can’t just avoid carrying out the work. :Q

Imported equipment should be maintained and serviced as required to extend its lifespan and reduce safety risks. Leaders generally are willing to do this; there shouldn’t be any problems. Even if there are issues, it’s not my fault. If I cause problems on my own, then I’ll just have to take the blame. Be cautious

The Chinese people are helpless; they really can’t repair imported equipment. I’ve never believed that, it’s just a matter of economic interests at play here

Foreign equipment incurs high costs for subsequent maintenance, and there are no manufacturers competing with them; moreover, the prices of spare parts are also very high.

This post was last edited by zhangya*ong on 2015-8-17 at 23:13. Whether it is domestic or imported equipment, the determination of its overhaul cycle must adhere to the following points: 1. Generally, in accordance with the design requirements of API612 or API617, new units should be able to operate continuously for more than 5 years; imported equipment usually meets this requirement as long as it is operated properly, while it’s harder to say the same for domestic equipment. 2. The overhaul cycle should be determined based on the actual operating conditions of the unit. If the medium used in the unit tends to cause scaling, then the maintenance cycle needs to be determined considering the unit’s actual output, whether that’s every three years or every five years. 3. If abnormal vibrations or other faults occur during equipment operation, it is necessary to consider the actual situation before deciding whether to carry out maintenance according to the established cycle; in such cases, flexibility is required, and emergency repairs may be necessary； 4. Follow the equipment’s life cycle, and determine the maintenance schedule flexibly based on the bathtub curve principle ； 5. As for whether to carry out repairs in-house or outsource them, the choice should be made flexibly based on technical capabilities. Some large nitrogen fertilizer production facilities possess strong skills in equipment maintenance; for example, the large fertilizer plant at my company, which was built in 1974, has had its maintenance teams service compressors from various brands such as Siemens, Delaware, GE, Simens, GHH, MAN, Atlas, Cooper, Mitsubishi, Hitachi, Elliott, Hangzhou Steam Engine, Shenyang Steam Turbine, Shaanxi Steam Turbine, Xiagao Cail, Fusheng, Ingersoll Rand, Sulzer, Shouli, York, MAAG, BHS, Nanjiang Gear, Chongchi, and Formosa Plastics ； Mining machinery: Shenyang Heavy Industry coal mills, Beijing Electric Power coal mills, Shenyang Mining stacker-reclaimers, conveying equipment, pumps, fans, and more