Design standards and specifications for fire shields of control valves
Thread Content
◆Circular No. 35 issued by the Emergency Management Department: “Notice on Carrying Out Safety Risk Assessments for Large Oil and Gas Storage Facilities.” A main shut-off valve should be installed at the point where the inlet and outlet pipes for the materials stored in the tanks meet the tank body. For large storage tanks (tanks with a nominal diameter of 30 m or more, or a nominal volume of 10,000 m3 or more), valves equipped with pneumatic, hydraulic, or electric actuators should be used. When the actuator is of electric type, its power cable, signal cable, and electric actuator shall be provided with fire protection. The cut-off valve should have automatic and manual shutdown functions, with manual shutdown including remote manual shutdown and on-site manual shutdown. ◆SH/T3005-2016 \"Code for Selection and Design of Automation Instruments in Petrochemical Industries\" 10.3.6.14 When process safety requirements dictate fire protection for emergency shut-off valves, the pneumatic actuators used for such valves and their accessories must have fire protection measures; preferably, fire protection covers should be installed. These covers must comply with UL1709 standards and be capable of withstanding hydrocarbon fires at 1093°C for 30 minutes. 10.3.7.114 When process safety requirements dictate fire protection for emergency shut-off valves, the electric actuators used for such valves and their accessories must have fire protection measures; preferably, fire protection covers should be installed. These covers must comply with UL1709 standards and be capable of withstanding hydrocarbon fires at 1093°C for 30 minutes. 10.3.7.12 When process safety requirements dictate fire protection for emergency shut-off valves, the power cables and signal cables used for the electric actuators of such valves shall be equipped with fire protection measures. ◆GB 51283-2020 \"Fire Protection Design Code for Fine Chemical Enterprises\" 5.8.3 Fire emergency shut-off control valves are fire safety on/off valves used to isolate combustible materials from fire-related equipment. The maximum stroke time of this valve should not exceed 10 seconds, and its allowable leakage level should meet at least the requirements specified in ANSI/FCI 70-2, Class V. The valve body and internal components (gaskets, packing, etc.) of the on/off valve must be capable of withstanding the fire resistance tests specified by API607 or API6FA standards. The pneumatic actuator of this valve and its accessories shall have fire protection measures; preferably, a fire protection cover should be installed (such a cover must comply with UL1709 standards and be able to resist hydrocarbon fires at 1093°C for 30 minutes). ◆Q/SH0749-2018 \"Technical Standards for the Storage and Transportation of Liquefied Hydrocarbons\" 12.2.7.(g) The fire shield of the emergency shut-off valve at the base of liquefied hydrocarbon spherical tanks shall comply with Sinopec Document No. Jian 518 \"Specifications for the Selection and Design of Emergency Shut-off Valves for Liquefied Hydrocarbon Spherical Tanks\" ； The fire shield for the emergency shut-off valve at the base of the spherical tank should be a rigid fire protection shield suitable for outdoor use; such a shield must be able to keep the temperature inside it below 80°C for 30 minutes in the presence of hydrocarbon fires at 1093°C. ◆Notice No. [2011] 518 issued by Sinopec regarding the issuance of the \"Design Specifications for Water Injection Systems in Liquefied Hydrocarbon Sphere Tank Areas\" and the \"Design Specifications for the Selection of Emergency Shut-off Valves for Liquefied Hydrocarbon Sphere Tanks\": 4.6.14 Pneumatic actuators and their accessories shall have fire protection measures; preferably, fire protection covers should be installed. Such covers must comply with UL1709 standards and be capable of withstanding hydrocarbon fires at 1093°C for 30 minutes. 4.7.11 Electric actuators and their accessories shall have fire protection measures; preferably, fire protection covers should be installed. Such covers must comply with the UL1709 standard and be able to resist hydrocarbon fires at 1093°C for 30 minutes. 4.7.12 The power cables and signal cables of electric actuators shall be provided with fire protection measures and shall comply with the provisions of 4.1.5. ◆AQ3053-2015 \"Safety Technical Specifications for Vertical Cylindrical Welded Steel Storage Tanks\" 6.13 Isolation Valve: A main isolation valve shall be installed at the part of the inlet and outlet pipes of the tank where they are close to the tank body. For large storage tanks, valves equipped with pneumatic, hydraulic, or electric actuators should be used. When the actuator is of the electric type. Its power cables, signal cables, and electric actuators should be provided with fire protection.
Your question concerns the design standards and specifications for the fire shield of control valves. Such fire shields are primarily used for the fire protection of control valves in petrochemical industries, storage tanks, and similar facilities. The main relevant regulations and requirements are as follows: 1. In accordance with Document No. 35 issued by the Emergency Management Department, titled \"Notice from the Office of the Emergency Management Department on Conducting Safety Risk Assessments for Large Oil and Gas Storage Facilities,\" the shut-off valves must have both automatic and manual shutdown functions. If the valves are electric type, their power cables, signal cables, and electric actuators must be protected against fire. 2. According to SH/T3005-2016 \"Code for Selection and Design of Automation Instruments in Petrochemical Industries\", when process safety requirements dictate fire protection for emergency shut-off valves, fire protection covers must be installed on the pneumatic actuators of such valves as well as their accessories. These fire protection covers shall comply with UL1709 standards and be capable of withstanding hydrocarbon fires at 1093°C for 30 minutes. 3. GB 51283-2020, the Fire Protection Code for Engineering Design of Fine Chemical Enterprises, stipulates that the pneumatic actuators and related accessories of fire emergency shut-off control valves must have fire protection measures; preferably, fire-resistant covers should be installed, and such covers shall comply with UL1709 standards, enabling them to resist hydrocarbon fires for 30 minutes at 1093°C. 4. Q/SH0749-2018 \"Technical Standards for the Storage and Transportation of Liquefied Hydrocarbons\" stipulates that the fire shield of the emergency shut-off valve at the base of liquefied hydrocarbon spherical tanks shall meet the requirements specified in Sinopec Document Jian 518 \"Specifications for the Selection and Design of Emergency Shut-off Valves for Liquefied Hydrocarbon Spherical Tanks\". 5. The \"Design Specifications for the Water Injection System in Liquefied Hydrocarbon Spherical Tank Areas\" and the \"Design Specifications for the Selection of Emergency Shutoff Valves for Liquefied Hydrocarbon Spherical Tanks\" issued by Sinopec in Document [2011] No. 518 require that both pneumatic actuators and their accessories, as well as electric actuators and their accessories, be equipped with fire protection covers. These fire protection covers must comply with the UL1709 standard and be capable of withstanding hydrocarbon fires at 1093°C for 30 minutes. 6. According to AQ3053-2015 \"Safety Technical Specifications for Vertical Cylindrical Welded Steel Storage Tanks,\" for the isolation valves of large storage tanks, if they are electric type, it is also required that their power cables, signal cables, and electric actuators be provided with fire protection. Overall, these regulations require that the actuators of valves and related components have fire protection measures, such as fire shields, and that these fire shields be capable of withstanding fire for a certain period of time at specific high temperatures. I hope this information will be helpful to you. .