Hydraulic pipe joints are different hydraulic components (pumps, delivery lines, reversing valves, shut-off valves, hydraulic motors, hydraulic cylinders, and some auxiliary components, such as liquid level gauges, thermometers, pressure gauges similar) to each other. A hydraulic system that connects to create a closed circuit is an accessory that functions as a connection.
Common mistakes in hydraulic fitting adoption:
• Case 1:
----- Thread sealant and raw material tape are used arbitrarily.
Although this type will not affect the external sealing of the joint, the solid debris of the thread sealant after curing can easily cause damage to other equipment on the pipeline.
For example, the NPT thread used in the safety of pressure vessels does not need to use thread sealant, but in fact a lot of sealant is applied. If it is not cleaned during regular inspection, it is very easy for debris to cut the soft sealing at the valve seat. It is very likely that there is also a failure of the pressure reducing valve.
If glue is to be applied, the end of the male thread cannot be glued. It must be cleaned after disassembly.
• Scenario 2:
----It does not take into account the sealing structure, and it is enough to install it without leakage.
If the valve and the pipeline are connected, there should be a transition of the connector, but the thread is directly tapped on the pipe and fixed with a raw material tape. This kind of practice does not take into account the special sealing structure, although it will not leak temporarily, it is not standardized.
This type of situation is more common in systems that are not installed under the guidance of VA.
• Scenario three:
---- Change the original sealing structure.
For example, the connector dedicated to the pressure gauge uses the gasket between the male and female heads for sealing, but sometimes a large amount of raw material tape is wrapped, which makes it difficult for the male head to contact the gasket, resulting in the use of raw material. Condition with seal.
It's likely that this happens mainly because of concerns about leaks.