Characteristics Of Shipping Industry
Date:2019-12-13 Click:1520
Characteristics of shipping industry
Shipyard is very simple. As a result, there is little space on board. Operators must reduce the volume to make the gas tank as small as possible. They do this through liquefied natural gas (liquefied natural gas, liquefied natural gas). By cooling to about natural gas, it becomes liquid. -165 degrees C. At this temperature, the main isolation Forged Steel Trunnion Ball Valve must still work.
What influences Forged Steel Trunnion Ball Valve design?
Temperature has an important influence on Forged Steel Trunnion Ball Valve design. For example, users may need it for popular environments such as the Middle East. Or it may be suitable for cold environments like polar oceans. Both environments affect the sealing and durability of Forged Steel Trunnion Ball Valves. The assemblies of these Forged Steel Trunnion Ball Valves include body, bonnet, stem, stem seal, ball Forged Steel Trunnion Ball Valve and seat. These components expand and shrink at different temperatures due to the different compositions of the materials.
Pressure problem
Pressure accumulation occurs in the normal treatment of refrigerants. This is due to the increase of heat in the environment and subsequent steam formation. Special attention is required when designing Forged Steel Trunnion Ball Valve / piping systems. This allows pressure to accumulate.
Temperature problem
Intense temperature changes can affect the safety of workers and factories. Each component of the cryogenic Forged Steel Trunnion Ball Valve expands and contracts at different rates due to different material compositions and the length of time they withstand the refrigerant.
Another big problem with refrigerants is the increase in heat from the surrounding environment. These increases in heat are the reason why manufacturers isolate Forged Steel Trunnion Ball Valves and pipes.
In addition to the high temperature range, Forged Steel Trunnion Ball Valves must also meet considerable challenges. For liquefied helium, the temperature of liquefied gas decreases to -270 C.
Functional issues
On the contrary, if the temperature drops to absolute zero, the Forged Steel Trunnion Ball Valve function becomes very challenging. Cryogenic Forged Steel Trunnion Ball Valves connect pipes to liquid gases in the environment. It does this at ambient temperature. The result may be that the temperature difference between the pipeline and the environment is as high as 300 degrees C.
Efficiency
The temperature difference produces heat flow from the warm zone to the cold zone. It will damage the normal function of the Forged Steel Trunnion Ball Valve. It also reduces system efficiency in extreme cases. This is of particular concern if ice forms at the warm end.
However, in low temperature applications, this passive heating process is also deliberately used. This process is used to seal the stem. Usually, the stem is sealed with plastic. These materials cannot withstand low temperatures, but the high performance metal seals of the two components move a lot in the opposite direction, which is very expensive and almost impossible.
Sealing problem
There is a very simple solution to this problem. You bring the plastic used to seal the stem to a relatively normal temperature area. This means that the stem sealant must be kept at a distance from the fluid.
The hood is like a pipe. If the fluid rises from this pipe, it warms up from the outside. When the fluid reaches the stem sealant, it is mainly at ambient temperature and gaseous. The hood also prevents the handle from freezing and from starting.