Popular methods for testing safety valves abroad

Why does our country require an inspection once a year, while API510 allows for every 5 or 10 years?

If it is indeed impossible to stop the device, a three-way structure can be used: one end is connected to the pipeline or container, the other two ends are connected to safety valves, and a manual on/off valve is installed at the inlet. This way, the safety valve can be removed separately for repair

For truly important occasions, a combined safety valve can be used. Commonly used on low-temperature vacuum storage tanks, one in use and one as backup. As for why an inspection is required once a year in China, whereas API510 allows for intervals of 5 or 10 years, it is definitely related to technology. I don’t think there’s any safety valve manufacturer in China that would dare to guarantee that my safety valve will operate correctly even after 5 or 10 years. We still need to keep developing technology. Improvements such as those in the new safety regulations, which involve a reduction in the material safety factor, are also the result of technological advancements in the steel industry.

It’s not really a matter of what to do; the key issues are money and the law. There are many ways to solve this, but with such high investment costs, businesses certainly won’t be willing to cover them. Stopping production for maintenance is not impossible, but manufacturers are reluctant to do so – it requires arranging for the supply of materials and stopping production, all of which involve costs; for large chemical companies, these are significant expenses. Take us as an example: each time we stop production, the logistical costs amount to at least 2 million or more. Add to that the loss incurred during periods of shutdown, and the management surely won’t be willing to accept such daily losses. The key to the problem is to find the most reasonable solution, rather than simply saying to install a twin valve. The cost of installing double valves is too high; it’s unaffordable. It wasn’t done during the infrastructure construction, and adding it now makes the renovation process extremely difficult. Even if a solution that combines rupture disks and safety valves is adopted, along with online calibration, the estimated cost is at least 70 to 80 million. In my *family’s* business, none of the safety valves are calibrated once a year as required by regulations. We’re all quite familiar with cooking at home; we just want to see if any of you who have traveled abroad have seen how it’s done there, and what good experiences they might have had.

Obtaining the \"Safety Valve Calibration Qualification\" from the Technical Supervision Bureau enables one to carry out safety valve calibration on a commercial basis. Qingdao Yijing Machinery Co., Ltd. established a safety valve calibration center in 2011 and obtained the \"Certification for Special Equipment Inspection and Testing Institutions of the People’s Republic of China\" (for safety valve calibration institutions). We undertake various types of offline and online calibration projects for safety valves, and can also provide customers with online maintenance and testing services for safety valves. Adhering to the principles of putting users first, service first, and quality first, we welcome your visit and feedback. http//www.qde9.cn