T/WZS 0011-2025 Active Group standards

T/WZS 0011-2025 Road transport of dangerous goods in liquid form - Tank vehicle - Emergency cutoff valve

Publish Date: 2025-02-27 Implement Date: 2025-03-27 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/WZS 0011-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Special vehicles

Publish Date: 2025-02-27

Implement Date: 2025-03-27

Scope

Scope: This document specifies the terms and definitions, types and basic parameters, requirements, test methods, inspection rules, marking, packaging, and storage of emergency shut-off valves for tank vehicles transporting liquid dangerous goods by road. This document applies to emergency shut-off valves used in tank vehicles transporting liquid dangerous goods, with the liquid dangerous goods limited to the common liquid dangerous goods media specified in Part 3 of Appendix A of GB 18564.1-2006 as having a design code of B for tank bodies. Main technical content: Emergency shut-off valves shall comply with the requirements of this standard and be manufactured according to the product drawings and technical documents approved through the prescribed procedures. For steel emergency shut-off valves used in operating conditions below -29°C, the valve body material shall meet the requirements of the national standards for low-temperature Charpy impact test. For steel emergency shut-off valves used in operating conditions below -46°C, they shall meet the requirements of low-temperature sealing performance. Emergency shut-off valves shall be equipped with fusible elements or used in conjunction with devices equipped with fusible elements. When the ambient temperature reaches 75°C ± 5°C, the fusible elements shall melt within ≤30 minutes, causing the emergency shut-off valve to automatically close, with no visible leaks at the contact surfaces of the valve disc, valve seat, and valve body. The actuating device of the emergency shut-off valve shall be able to connect to a remote control system, which can normally close the emergency shut-off valve in the event of an emergency. When the emergency shut-off valve is subjected to accidental damage such as external collisions, its designed shear structure (shear groove design) shall ensure that the sealing mechanism remaining within the independent compartment of the tank body remains intact. When the emergency shut-off valv