1. The pipelines for oil and gas transportation and the pipelines that need to be cleaned must be buried in the ground. The ball valves with full-diameter and all-welded layouts should be selected. For buried on the ground, full-diameter welded or flanged ball valves should be selected. Branch pipe, use flange connection, welding connection, full diameter or reduced diameter ball valve.
2. For the delivery pipeline and storage equipment of refined oil, the flanged ball valve shall be used.
3. On the pipelines of city gas and natural gas, choose the float ball valve with flange connection and internal thread connection.
4. In the oxygen pipeline system in the metallurgical system, it is advisable to use a fixed ball valve with a strict degreasing treatment and a flange connection.
5, low temperature medium pipeline system and equipment, should use low temperature valve with valve cover.
6. On the piping system of the catalytic cracking equipment of oil refining equipment, lifting rod type ball valves may be used.
7, the chemical system of acid and alkali and other corrosive medium equipment and piping system, should be made of austenitic stainless steel, PTFE seat ring for the stainless steel ball valve.
8. Metal-to-metal sealed ball valves may be used on metallurgical systems, power systems, petrochemical equipment, and high-temperature medium piping systems or equipment in urban heating systems.
9. When demanding flow conditioning, a worm-driven, pneumatically or electrically-operated conditioning ball valve with a V-shaped opening may be used.
The above information is issued by fluorocarbon finishing.