Pipeline valve running oil, oil, oil, oil leakage cause analysis and solutions to refrigeration equipment pipeline valve problems, see here?

Pipeline valve running oil, oil, oil, oil leakage cause analysis and solutions to refrigeration equipment pipeline valve problems, see here?

There is no better way to prevent pipe valves from running, leaking, dripping, or leaking than to prevent them. How to find the problem and avoid the accident before the valve failure?
Pipeline valves run oil, oil, oil, oil leakage prevention methods
1, prevent valve water leakage, steam leakage
All valves must be hydraulically tested in different grades after entering the factory.
Valves that need to be disassembled must be ground.
In the process of overrepair, it is necessary to carefully check whether the pan root is added and whether the pan root gland is tightened.
Valve before installation must check whether there is dust, sand, iron oxide and other sundries inside the valve. If any of the above sundries must be cleaned before installation.
All valves must be fitted with appropriate grade spacers before installation.
When installing the flange door, the fasteners must be tightened, and when tightening the flange bolts, they must be tightened in a symmetrical direction.
In THE PROCESS OF VALVE installation, ALL valves must be correctly installed according to the system and pressure, and random and mixed installation is strictly prohibited. For this purpose, all valves must be numbered and recorded according to the system before installation.
2. Prevent oil system leakage and oil running
The system with oil storage tank must be carefully checked and cleaned before installation.
Hydrostatic test must be carried out on equipment with oil cooler.
Hydrostatic test and pickling should also be done for the oil pipeline system.
All flanged joints or live connections with wire buckles must be fitted with oil-resistant rubber MATS or whetstone MATS during oil line installation.
The leakage points of the oil system are mainly concentrated in the flange and threaded live joints, so the bolts must be tightened evenly when installing the flange. Prevent leakage tight or not tight situation.
In the process of oil filtration, the construction personnel must stick to their jobs at all times, and it is forbidden to take off the post and string the post.
In the replacement of oil filter paper is necessary to stop the oil filter mechanism.
When installing the temporary oil filter connection pipe (** plastic transparent hose), the joint must be bound with lead wire firmly to prevent the phenomenon of jumping and running oil after the oil filter runs for a long time.
Deployment of responsible construction personnel to watch the work of the oil filter.
Before the oil circulation of the auxiliary engine oil system begins, the Engineering Department shall organize a detailed technical disclosure to the personnel in charge of the oil circulation of the auxiliary engine.
3, prevent equipment and pipe fitting joint surface bubble, bubbling, dripping, leakage
For flange gaskets above 2.5Mpa, metal winding gaskets are adopted.
1.0Mpa-2.5Mpa flange gasp, using asbestos gasp, and coated with black lead powder.
The flange gasket of the water pipeline below 1.0Mpa shall be rubber gasket and coated with black lead powder.
Water pump disc root are using PTFE fiber composite disc root.
For the sealed parts of smoke and air coal pipelines, the asbestos rope should be twisted and added to the joint surface smoothly at one time. It is strictly prohibited to add it forcefully after tightening the screws.
4. Prevent leakage of valve
Pipe installation construction, must establish a good quality awareness, consciously clean up the oxide iron sheet and pipe wall, do not leave sundries, ensure the pipe wall clean.
First of all, ensure that the valves entering the site must be 100% hydrostatic tested.
Valve GRINDING SHOULD BE CAREFULLY CARRIED OUT, ALL VALVES (EXCEPT IMPORTED VALVES) should BE SENT TO THE GRINDING TEAM FOR DISassembly inspection, grinding maintenance, and implementation of responsibility, SELF-consciously make records and marks, easy to trace. Important valves should be listed in detail for secondary acceptance, so as to make steel seal, seal and record requirements.
The boiler upper water gate and discharge gate should be determined in advance. Only these valves are allowed to be opened during the hydrostatic test, and other valves should not be opened at will, so as to protect the valve core.
When the pipe is flushed, it should be opened and closed gently to prevent damage to the door core.
5, if the valve has leaked, how to do?
The reason:
Cast iron casting quality is not high, the valve body and valve cover body has trachoma, loose organization, slag and other defects;
Day freezing crack;
Poor welding, slag inclusion, unwelded, stress cracks and other defects;
The cast iron valve was damaged by a heavy object.
Maintenance Methods:
To improve the casting quality, before installation in strict accordance with the provisions of the strength test;
The temperature of the valve at 0℃ and below 0℃, should be heat preservation or mixing, stop using the valve should be removed water;
The welding seam of the body and valve cover composed by welding shall be carried out according to the relevant welding operation rules, and the flaw detection and strength test shall be carried out after welding;
It IS FORBIDDEN TO PUSH AND PUT HEAVY OBJECTS ON THE VALVE. It is not allowed to hit the cast iron and non-metal valve with hammer. The installation of large diameter valve should be supported.
Valve GRINDING SHOULD BE CAREFULLY CARRIED OUT, ALL VALVES (EXCEPT IMPORTED VALVES) should BE SENT TO THE GRINDING TEAM FOR DISassembly inspection, grinding maintenance, and implementation of responsibility, SELF-consciously make records and marks, easy to trace. Important valves should be listed in detail for secondary acceptance, so as to make steel seal, seal and record requirements.
The boiler upper water gate and discharge gate should be determined in advance. Only these valves are allowed to be opened during the hydrostatic test, and other valves should not be opened at will, so as to protect the valve core.
When the pipe is flushed, it should be opened and closed gently to prevent damage to the door core.
All kinds of problems with the pipes and valves of refrigeration equipment. See here? The best way to deal with the “running, bubbling, dripping, leaking” of refrigeration pipe valves is to prevent them. How to find the problem and avoid the accident before the valve failure? So, we must do the following: 1, prevent valve water leakage, steam leakage 2, prevent oil system leakage, run oil 3, prevent equipment and pipe fitting joint surface bubble, bubbling, dripping, leakage
The best way to deal with the “running, bubbling, dripping, leaking” of refrigeration pipe valves is to prevent them. How to find the problem and avoid the accident before the valve failure? Then, we must do the following:
1, prevent valve water leakage, steam leakage
All valves must be hydraulically tested in different grades after entering the factory.
Valves that need to be disassembled must be ground.
In the process of overrepair, it is necessary to carefully check whether the pan root is added and whether the pan root gland is tightened.
Valve before installation must check whether there is dust, sand, iron oxide and other sundries inside the valve. If any of the above sundries must be cleaned before installation.
All valves must be fitted with appropriate grade spacers before installation.
When installing the flange door, the fasteners must be tightened, and when tightening the flange bolts, they must be tightened in a symmetrical direction.
In THE PROCESS OF VALVE installation, ALL valves must be correctly installed according to the system and pressure, and random and mixed installation is strictly prohibited. For this purpose, all valves must be numbered and recorded according to the system before installation.
2. Prevent oil system leakage and oil running
The system with oil storage tank must be carefully checked and cleaned before installation.
Hydrostatic test must be carried out on equipment with oil cooler.
Hydrostatic test and pickling should also be done for the oil pipeline system.
All flanged joints or live connections with wire buckles must be fitted with oil-resistant rubber MATS or whetstone MATS during oil line installation.
The leakage points of the oil system are mainly concentrated in the flange and threaded live joints, so the bolts must be tightened evenly when installing the flange. Prevent leakage tight or not tight situation.
In the process of oil filtration, the construction personnel must stick to their jobs at all times, and it is forbidden to take off the post and string the post.
In the replacement of oil filter paper is necessary to stop the oil filter mechanism.
When installing the temporary oil filter connection pipe (** plastic transparent hose), the joint must be bound with lead wire firmly to prevent the phenomenon of jumping and running oil after the oil filter runs for a long time.
Deployment of responsible construction personnel to watch the work of the oil filter.
Before the oil circulation of the auxiliary engine oil system begins, the Engineering Department shall organize a detailed technical disclosure to the personnel in charge of the oil circulation of the auxiliary engine.
3, prevent equipment and pipe fitting joint surface bubble, bubbling, dripping, leakage
For flange gaskets above 2.5Mpa, metal winding gaskets are adopted.
1.0Mpa-2.5Mpa flange gasp, using asbestos gasp, and coated with black lead powder.
The flange gasket of the water pipeline below 1.0Mpa shall be rubber gasket and coated with black lead powder.
Water pump disc root are using PTFE fiber composite disc root.
For the sealed parts of smoke and air coal pipelines, the asbestos rope should be twisted and added to the joint surface smoothly at one time. It is strictly prohibited to add it forcefully after tightening the screws.
4. Prevent leakage of valve
Pipe installation construction, must establish a good quality awareness, consciously clean up the oxide iron sheet and pipe wall, do not leave sundries, ensure the pipe wall clean.
First of all, ensure that the valves entering the site must be 100% hydrostatic tested.
Valve GRINDING SHOULD BE CAREFULLY CARRIED OUT, ALL VALVES (EXCEPT IMPORTED VALVES) should BE SENT TO THE GRINDING TEAM FOR DISassembly inspection, grinding maintenance, and implementation of responsibility, SELF-consciously make records and marks, easy to trace. Important valves should be listed in detail for secondary acceptance, so that “stamping, printing, record” requirements.
The boiler upper water gate and discharge gate should be determined in advance. Only these valves are allowed to be opened during the hydrostatic test, and other valves should not be opened at will, so as to protect the valve core.
When the pipe is flushed, it should be opened and closed gently to prevent damage to the door core.
5, if the valve has leaked, how to do?
Find the reason, the right medicine!
Leakage of body and bonnet
The reason:
Cast iron casting quality is not high, the valve body and valve cover body has trachoma, loose organization, slag and other defects;