Use and Maintenance of Nitrogen Axial Flow Pressure Relief Valves
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I. Introduction to Pressure Relief Valves: The pressure relief valves used by pipeline storage and transportation companies are mainly nitrogen axial-flow water hammer pressure relief valves manufactured by the American company DANIEL VALVES. Nitrogen axial-flow pressure relief valves are mainly installed on the relief pipelines at the inlet and outlet of oil transmission pipelines. They are designed to mitigate water hammer effects generated within the pipelines, thereby preventing damage to the pipelines caused by the high pressures resulting from water hammer. Water hammer: It is a phenomenon of significant pressure fluctuations that occurs in pressurized pipes due to sudden changes in the flow velocity of the liquid.
【Major Equipment in the Chemical Engineering Sector】329 – Domestic water hammer pressure relief valves pass industrial testing https://bbs.hcbbs.com/thread-3352607-1-1.html (Source: Hua Hai Chuan Liu – Haichuan Chemical Forum)
Nitrogen cylinder 1: The nitrogen cylinder should be painted and labeled with the name of the gas in accordance with the specified requirements. Nitrogen cylinder — black. 2. The shoulder of the gas cylinder indicates the specific date for the next inspection; it can be used safely until that date. Once it has passed that date, it must be taken to a specialized inspection facility for testing before it can be refilled for use, with inspections generally being carried out every two years. 3. Nitrogen cylinders must be secured when stored or in use to prevent them from rolling or falling. To ensure safety, it is best to install rubber shock-absorbing rings around the gas cylinder. 4. When using a gas cylinder, the valve at the top of the cylinder should be opened slowly; it must not be opened abruptly. When opening a high-pressure gas cylinder, the operator must stand to the side of the cylinder’s gas outlet