Product Introduction

Haff joint is a pipeline leak stopper. Haff joint and socket Haff joint are pipeline repair devices. Socket Haff joint is a device for repairing water leakage at the joint of two pipes, while Haff joint is a device for repairing parts other than the joint. The device has a simple structure consisting of only two bodies and two rubber pads, and is easy to install. Simply tighten the nut at the leakage point to complete the repair of the pipeline. Using this device can save time when water is cut off and reduce repair costs.

Performance Characteristics

1. The combination of plastic contact sealing and elastic contact sealing technologies is suitable for pipelines of various materials, effectively controlling the leakage problem of the medium.

2. The on-site use effect is good, and it can achieve no leakage. It adopts a block structure, with fast on-site construction speed, no need to stop water, small excavation volume, and only a small work pit needs to be excavated to operate, saving a lot of manpower, material resources, and time, and quickly achieving the purpose of plugging the leak.

3. Working pressure: 0.25-1.0MPa, suitable for repairing leaks in various cast iron pipes, cement pipes, and PVC pipes. The product specifications are complete and suitable for various national standard pipe diameters. Non standard can be processed and customized separately.

Main Types

There are many types of Haval joint fittings, mainly including the following main types:

1. Bending pipe fittings, which we come into contact with more often, involve turning straight pipes into curved pipes with different radii of curvature, such as elbows, bends, and so on;

2. Pipe fittings with flanges and circular edges, the former refers to pipe fittings that protrude inward or outward at the end of the pipe, while the latter refers to pipe fittings that form protrusions or grooves in the circumferential direction of the pipe;

3. Pipe fittings with rolled edges and bottom sealing, which increase the total strength of the pipe end by rolling edges towards the outside or inside of the pipe or sealing the end of the pipe fitting;

4. Expand the diameter of the pipe fittings by enlarging the end or a certain part of the pipe fittings to form various shapes according to the requirements;

5. Variable diameter pipe fittings refer to the reduction in diameter of a pipe end or a certain part of the pipe;

6. Variable wall thickness pipe fittings refer to the change in wall thickness along the length direction of the pipe; There are also many methods for processing pipe fittings. Many of them still belong to the category of mechanical processing, and the most commonly used methods are stamping, forging, rolling, bulging, stretching, bending, and combination processing. Pipe processing is an organic combination of machining and metal pressure processing;

7. Change the cross-section of the pipe fittings, and according to the requirements, transform the circular cross-section into square, oval, polygon, etc.

Mechanical Properties

The mechanical properties of the Haff joint are far superior to gray iron and close to steel. It has excellent casting, cutting and wear resistance, and has a certain degree of elasticity. It is widely used in the manufacture of advanced castings such as crankshafts, gears, pistons and various mechanical parts. The Haff joint accuracy is relatively high, generally reaching CT4-6 (CT10~13 for sand casting and CT5~7 for die casting). Of course, due to the complex process of investment casting, there are many factors that affect the dimensional accuracy of the Haff joint, such as shrinkage of the mold material, deformation of the investment mold, linear changes of the mold shell during heating and cooling, shrinkage rate of the alloy, and deformation of the casting during solidification. Therefore, although the dimensional accuracy of ordinary investment casting is high, its consistency still needs to be improved. Improve the dimensional consistency of castings using medium and high temperature wax materials significantly.

Haval joint sealing ring belongs to the field of pipeline repair technology, specifically involving a Haval joint sealing ring, which includes sealing rings set on both sides. The sealing rings are connected to each other by a first sealing strip and a second sealing strip. The position of the first sealing strip after being symmetrical about the central axis of the sealing ring is different from that of the second sealing strip, that is, the first sealing strip and the second sealing strip are not symmetrical about the central axis of the sealing ring. The setting of the Haval joint sealing ring makes the first sealing strip and the second sealing strip not completely close to each other or not close to each other when installed in opposition. The sealing effect of the sealing strip is achieved through the structural cooperation between the sealing strip and the Haval joint shell. Thus, the cooperation between the shell and the sealing strip greatly improves the high pressure resistance and water hammer resistance of the Haval joint, Ensured the sealing performance of the Haff joint.