Machining method of seamless elbow tee

1. Forging method: One end or part of the pipe is punched out by a die forging machine to reduce the outer diameter. The common forging machine has rotary, connecting rod and roll shapes.

2. Rolling method: generally not using the mandrel, suitable for the inner edge of thick-walled pipe. The core is placed in the tube and the peripheral is pressed by the roll for the round edge processing.

3. Stamping method: The pipe end is extended to the required size and shape, and the conical core is on the press.

4. Bending forming methods: There are three more commonly used methods. One method is called stretching method, the other is called pressing method. The third method is drum method. There are three to four rollers, two fixed rollers, one adjusting roll and one adjusting roll. The finished pipe is bent by fixing the roll spacing.

5. Inflatable method: one is to place rubber in the pipe, compress the upper part with a punch to make the pipe protrude; the other is to form a hydraulic protrusion, fill the middle of the pipe with liquid, and the liquid pressure will drum the pipe into the desired shape, which is mostly used in the production of bellows. Seamless elbows do not cause corrosion, pitting, rust or wear. Stainless steel is also one of the strongest building metal materials. Because stainless steel has good corrosion resistance, it can make the structural parts maintain the engineering integrity permanently.

According to the compensation amount of elbow in pipeline design, the diameter of outer casing should be enlarged accordingly to ensure that there is enough insulation thickness in elbow position after expansion and deformation. Thermal insulation materials should be changed accordingly, and high resilience soft insulation materials should be selected. Thermal insulation elbows are also made into thermal insulation prefabrication in prefabricated factories. Parts.

Three-way and different-diameter pipes are usually selected at branches of main steam pipelines to provide users with the necessary means of heat source. In the treatment of the above nodes, our products have unique technical treatment experience and can provide users with the best suggestions. Generally, fixed points are set at three-way or four-way junctions to ensure the stability of pipelines. Set up natural compensation on branch line to reduce thrust on trunk line.

Three-way and different-diameter pipes can be used for on-site heat preservation or made into prefabricated parts. According to the displacement given by the design, the T-shaped steel jacket can be increased appropriately, and the insulation thickness in the direction of branch pipe can be increased to effectively prevent water vapor from entering the insulation layer.