How is the design of the accordion connector?
The design of the accordion connector is done according to specific points. A blues is a flexible piece that runs along the pipeline. It consists of two unformed simples and one or more circular blades. Accordion joints are mostly used to repel vibration and movements that occur in the pipe path in exchange for temperature change. In addition, these connections also have the ability to prevent mechanical movements, such as reservoir sitting. A metal accordion connection is a special organ in piping lines that must be good resistance to fluid pressure while repelling the applied movements. Fluid pressure, temperature, fanrite coefficients, fluid pressure, etc. The most important factors in creating tension and longevity of joints are the most important factors.
In Erteash Gostar Peyman Company, all the accordion joints are designed according to the latest edition of EJMA (Flexible Fittings Standard). Meanwhile, during designing special accordion joint, stress analysis software is used in this complex and the parts are measured according to finite element method. Lack of proper design and wrong selection of effective parameters in design will cause the blues to twist when applying fluid pressure. These parameters can include the number of blades, the thickness of the blues, the step rate and the depth of the blades and so on. Are. The twisting of the accordion parts can occur in both plate and columnar forms.
Important points in the design of accordion joints
When designing an accordion connection, you should consider some points. In fact, in order to design a proper connection, the pipeline designer and the designer of the connections must follow the following points jointly.
- Amount of motion, flow direction, fluid velocity, applied motion shape, running fixed points, sport shape, etc. It should definitely be re-examined. In this case, the type of connection you ultimately choose will be in accordance with the movements applied and the type of situation.
- In accordion connection design, the material of the sheet to be used should be selected according to the type of fluid and environmental conditions of the place of execution. Most of the time, stainless steels in the group of 300 or the same austenitic stainless steels and nickel-based alloys are considered as the most suitable for the manufacture of the blues accordion part due to their high resistance to heat and corrosion.
- Note that in the design of the accordion connection in the following conditions, you should also consider an internal wall for the piece:
- When the flow is slow or low pressure.
- When the fluid velocity is so high that it causes flow tension and vibration increases. According to the standards, when the fluid speed exceeds the surface, you should consider an internal wall for the piece. In the case of gas، steam، and air fluids، if the size of the pipe is up to 6 and the fluid velocity is about 1.2 inches per second، you should consider this glazing. In tubes larger than 6 in size, if the fluid speed is greater than 6 IM/s, you should consider this wall. For water and liquid fluids, in pipes up to 6 sizes, if the velocity of fluid is greater than 0.6 inches per second, an internal wall is required. Also in these fluids in pipes above size 6, if the fluid speed exceeds 3 IM/s, you need interior wall design.
- The next item for creating an internal wall in accordion connection design is when the fluid passing through the pipe has corrosive or abrasive particles.