Lesotho water supply pipeline product supplier Zhongyuan Innovation Water Lesotho Pipe joints cross-border product service station

Introduction to Ductile Iron Telescopic Device

Ductile iron expansion joint is also called pipe expansion joint, cast iron expansion joint, expansion joint, compensation joint, etc.

Precautions for installation of ductile iron expansion joints

1. Before installing the ductile iron expansion joint, its model, specification, and pipeline configuration should be checked to ensure that they meet the design requirements.

2. For telescopes with inner sleeves, attention should be paid to making the direction of the inner sleeve consistent with the direction of media flow, and the hinge rotation plane of hinge type telescopes should be consistent with the displacement rotation plane.

3. For expansion joints that require "cold tightening", the auxiliary components used for pre deformation of ductile iron expansion joints should not be removed until the pipeline is installed.

4. It is strictly prohibited to use the method of deformation of the expansion joint to adjust the installation tolerance of the pipeline, in order to avoid affecting the normal function of the expansion joint, reducing its service life, and increasing the load on the pipe system, equipment, and supporting components.

5. During the installation of ductile iron expansion joints, welding slag is not allowed to splash onto the surface of the wave casing, and other mechanical damage to the wave casing is not allowed.

6. After the installation of the pipe system, the yellow auxiliary positioning components and fasteners used for installation and transportation on the wave expander should be removed as soon as possible, and the limit device should be adjusted to the specified position according to the design requirements, so that the pipe system has sufficient compensation capacity under environmental conditions.

7. All moving components of ductile iron expansion joints shall not be blocked or restricted by external components, and the normal operation of each moving part shall be ensured.

8. During the hydrostatic test, the secondary fixed pipe rack equipped with the end of the telescopic pipe should be reinforced to prevent the pipe from moving or rotating. For expansion joints and their connecting pipes used for gaseous media, it is important to note whether temporary supports need to be added during water filling. The 96 chloride ion content of the water cleaning solution used for hydrostatic testing shall not exceed 25 PPM.

The model of sleeve type expansion joint is SF/SSQ, commonly referred to as expansion joint or pipe compensator. Its structural form is almost the same as that of the casing type cast iron telescopic device. It is divided into two types: limit telescopic device and non limit telescopic device. When ordering, it is important to specify whether to install a limit device.

Technical parameters of ductile iron expansion joint