With the rapid development of the hydraulic pipe market, hydraulic pipes have become the research focus of enterprises in the industry. Today, let's learn about the key hydraulic pipes: What is a hydraulic pipe?

Key hydraulic pipe: What is the hydraulic pipe?

The hydraulic pipe is called hydraulic pipe because it is a pipe used to transmit hydraulic pressure. Can be divided into hard tube and flexible tube. Among them, the hard pipe is mainly seamless steel pipe, while the flexible pipe is made of layered steel mesh and rubber. Hoses are often used in areas where bending and changes are required in the working environment, while rigid pipes have strict standards. We can choose different diameters of hard pipes and hoses according to the flow of the conveying medium, and we can also choose different pressure hydraulic pipes.

Key hydraulic pipe: What is the hydraulic pipe standard?

The standard of hydraulic hard pipe 3360 seamless steel pipe for fluid shall conform to the national GB 816399 standard, and the high-pressure seamless steel pipe for chemical fertilizer equipment shall adopt GB 647 standard. Oil drill collar hydraulic pipe shall adopt YB 691-70 standard. For hydraulic hoses, it can be divided into three types of implementation standards, the first is the DIN, SAE, ISO and GB/T standards that are often used in trade. Secondly, knitted hydraulic hoses have DIN en 853, J 517, GB/T 3683-2011, ISO 1436 and other types. There are also winding hydraulic hoses of DIN E No.856,SAE J 517 and other types.

Critical hydraulic lines: What is the correct installation procedure for hydraulic lines?

1. Installation of Flare Fitting

(1) Before installation, the steel pipe (/-1) should be sawn vertically to remove burrs on the inner and outer diameters and remove dirt. If necessary, the bushing and nut should be installed, and then the special equipment should be flared, size d.

should be between D1 and D2,

(2) When installing, the steel pipe, flaring shaft and cone shaft of the joint body should be concentric.

(3) After aligning the flared surface of the pipe with the conical surface of the joint body, tighten the nut by hand, and then tighten it with a torque wrench according to the torque short torque recommendation table; if there is no torque wrench, tighten it with an ordinary wrench for 1 to 2 turns, generally 1 turn for large size and 2 turns for small size.

2. When using flared joints, the following points should be noted:

(1) The tightening torque should not be too large or too small;

(2) There shall be no crack at the flaring of the pipe, if any, replace it;

(3) No magazines, pits, etc. On the sealing face of the connector body or flared tube.

3. Installation of taper pipe threaded joint

Add sealing material to the external thread, and when adding the stock tape, wrap the external thread clockwise (from the pipe end) to 1.5 to 2 turns.