Welding of cast iron expansion joint for thermal piping

Welding of cast iron expansion joint for thermal piping
When the temperature of the material conveyed by the thermal piping cast iron expanders exceeds 200℃, the heat pump piping needs to be established so that a small amount of material from the actual pump discharge piping to the outlet of the thermal piping cast iron expanders can then flow through the thermal piping cast iron expanders to the thermal piping cast iron expanders inlet, making the thermal piping cast iron expanders easy to start in the standby condition.
 
① Causing the thermal pipeline cast iron expansion joint to affect the sealing effect due to excessive deformation;
 
②The material of cast iron expansion joint for thermal pipeline is mostly graphite, which is generally brittle and extremely easy to be shattered due to excessive force;
 
③It is difficult to install and disassemble, and it is very easy to damage the cast iron expansion joint.
 
In fact, there are many factors that lead to the leakage of the thermal pipe cast iron expander, such as the failure of the thermal pipe cast iron expander pad, offset, impurities in the thermal pipe cast iron expander, large shape error at the shaft and sleeve, contact surface damage, gaps between the components of the thermal pipe cast iron expander, the thermal pipe cast iron expander thread is too long etc. will lead to pipeline leakage.