GB/T 20217-2006 specifies procedures for ensuring the cleanliness of industrial process measurement and control devices for oxygen. This standard applies to related devices and is designed to prevent safety risks caused by unclean devices. It covers the consideration of fouling-prone structures in the design stage of the device; the processing and cleaning process requirements in the manufacturing process; protective measures during transportation and storage; the cleaning inspection process of the site, tools and the device itself before installation; and regular cleaning and maintenance specifications in use. Following this standard can effectively ensure the cleanliness of industrial process measurement and control devices for oxygen, ensure the safe and stable operation of the equipment, and reduce the risk of accidents.