Joints / Strainers

Expansion Joints and Dismantling Joints in Pump-Station Piping

Explain why MIC lists expansion joints and dismantling joints next to valves.

A rubber expansion joint absorbs thermal growth, small misalignment, and vibration between a pump or vessel and the pipe. The flanged rubber bellows is the flexible element; the pipeline flanges take the pressure thrust unless restraint rods are specified.
A dismantling joint is a telescopic flanged fitting that shortens so a valve, pump, or meter can be pulled from the line without spreading the pipe. It is common next to flanged gate and butterfly valves in chambers.
MIC Valve lists expansion joints, dismantling joints, and strainers under one family. Strainers (Y-type and basket / U-type) protect pumps and meters from debris; they are not flexible connectors.
Some strainer listings cite DIN 3202 F1 and PN16 with cast-iron bodies. Repeat those ratings only on the models that print them.
When quoting a pump-station set, specify the valve, the dismantling joint length range, and any expansion joint on the same isometric so face-to-face lengths match. Send DN, flange drill, and whether restraint rods are required.