What is an emergency shut-off valve?
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What is an emergency shut-off valve? (1) In the document \"Specifications for the Selection and Design of Emergency Shut Off Valves for Liquefied Hydrocarbon Spheres in Sinopec – 2011\", it is defined as follows: An emergency shut off valve is a type of valve specifically designed to be installed on the inlet and outlet pipelines of liquefied hydrocarbon spheres; it enables rapid and complete shutdown (TSO) and isolation of flammable and toxic materials in the event of fires, leaks, or other accidents within the tank area. When the liquid level in the spherical tank reaches or exceeds the high-high level limit, the emergency shut-off valve can be used to prevent the material from overflowing the tank. The emergency shut-off valve shall have automatic and manual shutdown functions, with the manual shutdown function including remote manual shutdown from the control room and on-site manual shutdown. (2) In addition, other documents provide the following definitions: emergency shutdown valve, emergency isolation shutdown valve, and emergency isolation block valve. Regardless of how they are named, their function is the same – to minimize the impact of a fire on the production facilities by cutting off or isolating certain elements, thereby preventing the situation from worsening. Other requirements for emergency shut-off valves, such as piping requirements, TSO requirements, and manual/automatic shutdown functions, are all designed to support this fire safety function. In daily work, many people confuse the emergency shut-off valves used for fire isolation with those used for safety interlock systems SIS. In fact, the emergency shut-off valve EBV is different from the shut-off valves used for interlocks in SIS. The valves in SIS are designed to reduce risks; they activate before a hazard occurs, and are subject to requirements related to functional safety and safety mechanisms (as described in detail in the SRS). There are no fire protection requirements regarding their structural design ； The emergency shut-off valve here meets API’s fire-resistant design requirements, enabling operations to reduce damage in the event of a fire. As for whether to use BPCS or SIS interlocks, it should be determined based on the presence of SIFs as derived from HAZOP and LOPA analyses.
My previous understanding was quick switching on and off
Very professional; it has deepened my understanding of emergency shut-off valves. Thank you for sharing!
Very professional; it has deepened my understanding of emergency shut-off valves. Thank you for sharing!
In other words, the function of the emergency shut-off valve includes that of a SIS-interlocked shut-off valve; it can not only perform interlocked shutdown at high levels but also shut off in the event of a leak or fire
I have a question: how do I manually operate the EBV valve on-site?
Zhejiang Weixin Metal Products Co., Ltd. was established in 1998 and is an industrial company specialized in the production of pipe fittings. Cam-lock quick connectors made of aluminum alloy, copper alloy, and stainless steel, as well as fittings for tank trucks and sprinkler trucks. Manufactured in accordance with American and German standards. The product is widely used in water and oil transportation systems in industries such as petroleum and chemicals ； The company possesses a complete set of production processes, including product development, mold manufacturing, gravity casting of aluminum alloys, casting of copper alloys, T6 treatment of aluminum alloys, and product processing. The products are exported to countries in Europe, the United States, the Middle East, Australia, Southeast Asia, etc., and are highly trusted by customers ； Adhering to the principles of \"people-oriented, quality first, integrity supreme, and sincere cooperation,\" the company is committed to providing you with the highest quality products and the most satisfactory service. We warmly welcome friends at home and abroad to establish long-term, friendly, and mutually beneficial cooperative relations with our company.