1. Select oil and natural gas transportation main lines, cleaning pipes, ball valves with full diameter and full welded structure that need to be buried underground. Choose buried in-floor full port diameter welded or flanged ball valves, branch, flanged, welded, full port or small diameter ball valves.
2. Refinery water pipelines and storage equipment use flanged ball valves.
3. Choose flange connection and female thread connection floating ball valve on city gas and gas pipelines.
4. In the oxygen pipe system of the metallurgical system, the fixed ball valve connected by the flange with strict de-paper treatment should be selected.
5. In the pipeline system and equipment of low temperature medium, it is recommended to use low temperature ball valve with added valve.
6. A poppet ball valve can be selected in the piping system of the catalytic decomposition unit in the refinery.
7. It is recommended to select all stainless steel ball valves made of austenitic stainless steel and sealed with polytetrafluoroethylene in the acid-base and other corrosive medium devices and piping systems in chemical systems.
