The principle of hydraulic butt fusion machines
is to heat two surfaces to a designated temperature, and then fuse them together by application of force. This pressure causes the flow of the melted materials, which causes mixing and thus fusion. When the polyethylene material is heated, the molecular structure is transformed from a crystalline state into an amorphous condition. When fusion pressure is applied, the molecules from each polyethylene part mix. As the joint cools, the molecules return to their crystalline form, the original interfaces are gone, and the two pipes have become one homogeneous unit.
In order for the hydraulic butt fusion machine to exert its due thermal fusion efficiency, we must strictly follow these operating procedures and adjust the parameters according to the situation.
The principal operations include:
The pipe ends must be clean and free of any dirt, debris, or other contaminants.
The pipe pieces were held axially to allow all subsequent operations to take place.
The pipe ends must be faced to establish clean, parallel mating surfaces perpendicular to the centerline of the pipes.
The pipe ends must be aligned with each other to minimize mismatch or high-low of the pipe wall.
A melt pattern that penetrates into the pipe must be formed around both pipe's ends.
The melt patterns must be joined with a specified force. The force must be constant around the interface area.
The molten joint must be held immobile with a specified force until adequately cooled.
When Butt Fusion is used to join pipes and other components together they must have the same outside diameter and the difference between minimum wall thickness dimensions for the two components being joined should not exceed 26%.
Example: You have a pipe or fitting that has a wall thickness of 25 mm (1”). You can weld that pipe to pipes or fittings that have a wall thickness of 20 mm (3/4”) min or 32 mm (1-1/4”) max.
(1) The pipeline is only as strong as its weakest link.
(2) The fusion pressure is used to join two different walls.
As an expert who has studied hydraulic butt fusion machines for many years, RIYANG can give you some guidance on the use and operation. If you have a need for this, we are undoubtedly your best choice.
RIYANG is a professional butt fusion machine
manufacturer with many years of experience, equipped with a professional quality inspection system and a comprehensive management team. Because of its excellent quality, our products are sold all over the world and used in various fields. We are committed to researching and developing new solutions to bring more efficient methods to solve the actual needs of customers. Our thoughtful service is also one of the important reasons that make us a leader in the industry. If you want to buy our hydraulic butt fusion machines, please contact us immediately!