Typically, U-bolt support is used for the pipe under 2" size as the lateral guide support. It can be bolted up with double nuts for keeping a small gap, e.g. 1/8", around the pipe. And, the oversized U-bolt is typically installed on the outside insulation of the steam or condensate pipes as a pipe guide. For the steam pipe of 2" and larger, the pipe shoe may be used for the required support.