How much displacement can be accommodated on a hanging clamp pipe support?

It depends upon which typeof hanger you are using the clamp with and the amount of movement and the distancebetween the pipe and the nearby structural attachment point. On a variablespring, it is designed to accommodate 4 degrees of movement as a general rule.

G-Type Variable Spring Clamp Assembly Supporting a Pipe in the Field
G-Type Variable Spring Clamp Assembly Supporting a Pipe in the Field
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