Above DN600 ductile cast
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pipe installation is not easy to reach the designated position.
By the analysis of the causes of this phenomenon are as follows: (1) pipe stress uneven when installation or not straight pipe assembly, the friction resistance increases, thus the pipe is not easy to reach the designated position.
Because of using the rope pulley for installation, the pipe on both sides of the pulley is at the centre pipe line not easily, even if the tubes on either side of the force as there is no guarantee that the machine to receive strength evenly in the pipe.
Aimed at this situation, we made a steel saddle (
The inner diameter slightly larger than pipe diameter)
, in its mouth in the position of the center line of the pipe welding hook.
When installation will saddle on the socket end, and then to install.
So as to ensure the machine to receive strength evenly in the installation time on both sides of the pipe.
2 because of commonly used lubricants for the soap and water, its water grooves or under the condition of high temperature little lubrication, in this case, we usually choose high viscosity oil as a lubricant.
(3) rubber seal installation is not correct, when the pipe for installation because the larger the friction of the aprons from its original position.
(4) because of non-standard operation, in the process of transportation and hoisting the socket round, which may lead to a difficult to install.
This kind of situation is relatively rare, for loss of round tube, and need a special tool for school circle.
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