T/CASEI 056-2025 The test rules for the type of respiratory valve

Scope

Scope: This document specifies the scope, procedures, test items, methods, result determination, and certification management for the type testing of breathing valves. This document applies to the type testing of breathing valves installed in storage tanks for oil, petrochemical products, and other similar liquids, with a design positive pressure not exceeding 100 kPa, a design negative pressure not less than -6.9 kPa, and a design temperature not lower than -30 °C. This document also applies to the type testing of gravity-type emergency relief devices for the aforementioned storage tanks. The type testing of breathing valves or other venting devices with overpressure relief and/or vacuum suction functions on other equipment can be carried out in accordance with this document. Key technical content: This document specifies the scope, procedures, test items, methods, result determination, and certification management for the type testing of breathing valves. This document applies to the type testing of breathing valves installed in storage tanks for oil, petrochemical products, and other similar liquids, with a design positive pressure not exceeding 100 kPa, a design negative pressure not less than -6.9 kPa, and a design temperature not lower than -30 °C. This document also applies to the type testing of gravity-type emergency relief devices for the aforementioned storage tanks. The type testing of breathing valves or other venting devices with overpressure relief and/or vacuum suction functions on other equipment can be carried out in accordance with this document.

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