Hydraulic prop pipe is the abbreviation of seamless steel pipe for manufacturing hydraulic props and hydraulic supports.
Hydraulic prop pipe is an important material used in single hydraulic props for comprehensive mechanized mining in coal mines, and is the main component (cylinder or plunger) of hydraulic props for mining.
Single hydraulic props are composed of base, cylinder, plunger, top cover, sealing ring, return spring, plunger guide ring, etc. The specifications of seamless steel pipes for single hydraulic props are usually 114mmx10mm, 95mmx10mm, etc.
Hydraulic prop pipes can be divided into two categories according to their use: cylinder pipes (including structural pipes) and cylinder (i.e. plunger) pipes. Cylinder pipes include hydraulic prop cylinder pipes, hydraulic support single telescopic prop cylinder pipes, double telescopic prop large cylinder pipes, and jack cylinder pipes.
chemical composition
Mechanical behavior
Hydraulic strut pipe
It is mainly used to make hydraulic supports, cylinders and columns in coal mines, as well as other hydraulic cylinders and columns.
Representative materials of hydraulic support pipes are 20#, 45#, 27SiMn 30CrMoSiA, etc.
Heat treatment system: 20# and 45# are both normalized; 27SiMn (920±20) ℃ water quenching, (450±50) ℃ tempering, coolant: oil or water.
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