Hydraulic pipe joint standard shared by Carbon Steel Pipe Nipples Supplier.
Assembly of sleeve type pipe joints:
1. Pre-installation: the most important link of the pre-installation of the sleeve type pipe joint, directly affects the reliability of the seal. Special precursors are generally required. Small diameter joints can be preinstalled on the bench pliers. The specific approach is to use a connector as a matrix, the nut, sleeve pressure on the pipe can be. There are mainly bayonet straight pipe connector, bayonet end straight through connector, bayonet three - way pipe connector and other types. The author found that, even if it is a batch of goods from the same manufacturer, the depth of the conical hole on these joints is often not the same, resulting in leakage, and this problem is often ignored. The correct way is to use what kind of joint body to connect one end of the pipe, and preinstall the corresponding end with the same type of joint, so as to minimize the leakage problem. (2) pipe end should be flush. After the pipe is cut, it shall be polished flat on the grinding wheel and other tools, and the burr shall be removed, cleaned and cleaned with high-pressure air before use. (3) pre-installation, should try to maintain the tube and joint body coaxiality, if the tube deflection is too large will cause sealing failure. (4) the pre-installed force should not be too ambassador sleeve of the inside edge just embedded in the pipe wall, the sleeve should not be obvious deformation. When connecting pipelines by the Carbon Steel Pipe running nipple, assemble according to the specified tightening force. ф 6-1 card set of tight force of 15 n, 16, 64-1 ф mmr259n 18 mm, ф 450 n. If the sleeve is badly deformed during pre-installation, the sealing function will be lost.
2. Do not add sealant and other fillers. Some people in order to achieve better sealing effect, on the card sleeve coated with sealant, sealant was flushed into the hydraulic system, causing hydraulic components nikong plug and other failures.
3. When connecting the pipe, the pipe should have enough deformation margin
to avoid the pipe being subjected to tensile force.
4. When connecting the pipeline, the side force should be avoided, which will cause loose sealing.
5. When connecting the pipeline, it should be good for one time and avoid multiple disassembly, otherwise the sealing performance will be poor. Carbon Steel Pipe Fittings installation installation: (1) as required, the pipe that needs pickling should be pickling first; (2) cut the pipe with sawing machine or special pipe cutting machine and other tools according to the required length. It is absolutely not allowed to cut the pipe with dissolution (such as flame cutting) or grinding wheel; Remove internal and external burrs, metal chips and dirt at the pipe end; Remove anti-rust agent and dirt from pipe joints; At the same time to ensure the pipe roundness; (3) insert the nut and the clamping sleeve into the pipe successively. The front edge of the clamping sleeve (small path end) is at least 3mm from the pipe mouth. (4) slowly tighten the nut, turn the pipe until it is still, then tighten the nut 2/3 ~ 4/3 turns; (5) disassemble the sleeve to check whether it has been cut into the pipe and the position is correct. The sleeve is not allowed to have axial movement, but can be slightly rotated; (6) re-tighten the nut after qualified inspection.
