The cold working methods of steel pipes mainly include cold drawing and cold rolling. The raw materials of cold-rolled steel pipes can be hot-rolled seamless steel pipes or welded pipes. The common characteristics of the cold working method of steel pipes are high dimensional accuracy and good surface roughness. It can produce very thin (up to 0.05~0.01mm) thin-walled tubes and very thin (up to 0.3~0.1 mm in diameter) capillaries.
Seamless Steel Pipe is a kind of pipe with hollow section, which is widely used to transport fluids, such as oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe is light in weight when its bending and torsional strength is the same. It is a kind of economic section steel, which is widely used in pipeline engineering.
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2. Adjust the hook jaws to the hooks to catch the pulled object.
3. The handle is inserted into the tilt hole to tilt the piston's starting lever forward and forward smoothly, and the claw hook retreats accordingly to pull the pulled object.
4, the hydraulic puller piston start lever effective distance is only 50mm, so use when the reach should not be greater than 50mm, when not pulled out to stop, release the oil return valve, let the piston start rod retracted, adjusted after a second time Repeat steps 1, 2, and 3 until they are pulled out.
5. To retract the piston starting rod, just use the handle slotted end to loosen the return valve stem counterclockwise, and the piston starting rod gradually retracts under the action of the spring.
6. Before use, according to the outer diameter of the object to be pulled, pull distance and load force, select the corresponding tonnage of the hydraulic puller, avoid overloading and avoid damage.
7. The hydraulic puller is used in -5°C~45°C, and uses (GB443-84)N15 mechanical oil; it is used in -20°C~-5°C and adopts (GB442-64) synthetic spindle oil.
8, in order to prevent damage caused by overloading equipment, hydraulic devices equipped with overloaded automatic unloading valve, when the object is pulled over the rated load, the overload valve will automatically unload, should be used to select larger tonnage hydraulic puller.
DYF split type hydraulic puller use method
1. When using, put the slotted end of the handle into the return valve stem and tighten the return valve stem clockwise.