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How to install cast iron telescopic device?

May. 05, 2019

How to install cast iron telescopic device?

Cast iron expansion generally used in the pipeline compensation connection, common cast iron scale for bushing cast iron scale commonly, expansion pipe used in grey cast iron and nodular cast iron are the main types of materials, better general properties of nodular cast iron expansion, in use process has good flexibility and basically different maintenance, gray cast iron expansion in use process is easy to rust but the price is reasonable, is also widely used.

Precautions for installation of cast iron telescopic device:

1. Before installation, cast iron telescopic device should be checked for its model, specification and pipeline configuration, which must meet the design requirements.

2. For cast iron telescopic with inner sleeve, the direction of inner sleeve bobbin should be consistent with the direction of medium flow, and the rotation plane of cast iron telescopic hinge should be consistent with the rotation plane of displacement.

3. The telescopic device requiring "cold tightening" shall be removed after the auxiliary components used for pre-deformation are installed in the pipeline.

4. It is strictly prohibited to adjust the installation out-of-tolerance of pipes by means of deformation of cast iron telescopic, so as not to affect the normal function of the telescopic, reduce the service life and increase the load of piping, equipment and supporting members.

5. During the installation of the cast iron telescopic device, the welding slag is not allowed to splash on the surface of the wave shell, and the wave shell is not allowed to suffer other mechanical damage.

Double flange limited telescopic joint

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

7. All movable components of cast iron telescopic device shall not be stuck or restricted by external components, and the normal operation of all movable parts shall be guaranteed.

8. During the hydraulic test of cast iron telescopic pipe, the secondary fixed pipe rack with telescopic pipe end shall be strengthened to prevent the pipe from moving or rotating. For the telescopic device used for gas medium and its connecting pipeline, pay attention to whether temporary support is needed when filling water. The content of 96 chloride ion in the water cleaning solution did not exceed 25PPM.

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