|Variable Spring Part No.
|Categorized by spring rate.
|Variable Spring Size
|Categorized by load range.
|Variable Spring Type
|Categorized by physical shape.
|Hot load / Hot setting / Operating load
|The weight the variable spring has to support while the pipe line system is in operation.
|Cold load / Cold setting / Installed load
|The weight the variable spring has to support while the pipe line system is NOT in operation. This is also called pre-set load.
|The measure of a vertical travel distance of the pipe which is supported by the variable spring when the pipe line is in operation.
|Movement/ Travel direction
|The movement direction, either UP or DOWN of the pipe while in operation compared to its resting point (not in operation).
|Lbs/in of spring travel.
|The test which determines whether or not the variable spring will support the operating load.
|Limit the spring travel at the top and bottom to a small percentage beyond the specified range. In addition, they prevent the spring from moving while the spring is not in operation (in pre-set mode) or in hydrostatic testing phrase.
|Top Plate on which the pipe load rests.
|The amount of supporting load variation on horizontal piping. The percentage of variability should not exceed 25%.