T/CATSI 03002-2025 Requirements for Spot Checks of Liquefied Petroleum Gas Cylinder Valves

Scope

Main technical content: **5.1 Material Requirements** 5.1.1 Metal Materials The relevant requirements for valve body materials shall be implemented in accordance with GB 7512. The copper content should be 57–60%, the iron content should not exceed 0.5%, the lead content should be 0.8–1.9%, and the nickel content should not exceed 0.5%. The total amount of Cu + alloy elements (excluding iron) should be no less than 99%. For randomly selected bottle valves, spectral analysis shall be conducted after polishing. If there are objections to the inspection results, a re-inspection using the chemical titration method may be conducted. 5.1.2 Non-metallic Sealing Materials Non-metallic materials shall comply with the relevant requirements of GB 7512 and GB/T 35208. For rubber sealing rings, after soaking in liquid petroleum gas at a temperature of 23 ± 2 °C for 70 hours, the volume expansion rate should not exceed 25% or the shrinkage rate should not exceed 1%, and the mass loss rate should not exceed 10%. **5.2 Weight Requirements** For bottle valves with a PZ27.8 threaded inlet, the weight should be no less than 400 g, with copper components accounting for no less than 360 g; for bottle valves with a PZ39.0 specification, the weight should be no less than 470 g, with copper components accounting for no less than 430 g; and for bottle valves with a M26 × 1.5 specification, the weight should be no less than 415 g, with copper components accounting for no less than 375 g. **5.3 QR Code Requirements** The QR code shall be uniformly coded and comply with the requirements of GB/T 45439, and it should still be able to be scanned and read normally after being exposed to a temperature of no less than 800 °C in liquid petroleum gas flames for 15 minutes.

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