Do the pneumatic valves on oxygen pipelines need to be explosion-proof?

Do the electrical components of the pneumatic valves on high-pressure oxygen pipelines need to be explosion-proof? It is definitely necessary to require explosion-proof features. The regulations for oxygen pipeline systems state the following: Instruments are usually controlled by electronic components and/or pneumatic systems. The operation mode of the instrument should be one of the following, or a combination of two or more of them: . Air pressure control using a stable power supply ； . Pressure control using a stable instrument air supply ； . Pressure control is achieved using a gas. Note: All instruments used in oxygen application facilities should be manufactured from compatible materials and properly cleaned and degreased before installation. Systems that use gaseous oxygen as the application gas should be installed indoors or in areas with good ventilation to avoid the risk of oxygen-rich gases. 8.3 Standards and Design Specifications Design, manufacturing, inspection, testing, and verification shall comply with ** or international standards, such as ASME B31.3 (see Appendix G, Reference 6.6). For copper and copper-nickel alloy versions, specific design codes such as BS1306 (see 6.2) or ASME B31.3 (see 6.6) should be referred to. The installation of electrical equipment and instruments shall comply with relevant ** or international standards (see Reference 5.7). BS IEC 61508 (EN 61508 in draft form): “Functional Safety of Electrical/Electronic/Programmable Electronic Safety Related Systems” – the functional safety of electrical/electronic/programmable electronic systems related to safety. Application guides for IEC61508-2 and IEC61508-3. Electrical equipment installed in areas at risk of explosion and fire must comply with the requirements of GB 50058. The area inside the protective wall of the turbine oxygen compressor, as well as the space between the liquid oxygen storage and distribution areas and the oxygen control valve assemblies, falls under Zone 21 according to the fire hazard regulations; the area adjacent to the oxygen filling station and the oxygen storage tank rooms are classified as Zone 22 under these same regulations. For specific details, refer to the relevant safety specifications for deep oxygen and related gases (the GB16912-2008 standard is cited above)

Yes, I remember that everything in my company has to be explosion-proof

As a supplementary note, when purchasing such valves, you simply need to provide the operating conditions; the supplier will then supply them in accordance with relevant regulations. These are considered spare parts for special equipment.

Explosion protection is required; an explosion-proof actuator will suffice. The specific explosion protection rating should be determined based on the concentration levels and the customer’s requirements, so as to select an actuator with the appropriate rating