Pipe Clamps and Welding to the Pipe

Abstract

Pipe supports and restraints are an essential part of a properly supported piping system and may be connected by clamps with threaded members, welds, etc. Depending on the application, the type of connection may favor a clamp with threaded member connection, a clamp directly welded to the pipe, or another welded pipe attachment. For example, economics, planning involved, system efficiencies, and inevitable field changes are evaluated to determine the feasibility and impact of each type of connection. Multiple types of welded pipe attachments (i.e. shear lugs, trunnions, and stanchions) are considered with their corresponding advantages and disadvantages as well as methodologies of analyses. The hybrid of threaded member and welded connections have shown advantageous in certain applications. Historically and previously, stanchions have been provided for anchors but state-of-the-art designs (i.e. base clamp with trunnion) that have been around for the last couple decades are investigated for prevention of translation and rotation of the pipe in the application of supports, guides, and anchors. Also, this study is open to straight pipe as well as short and long radius elbows. Lastly, multiple accepted approaches for analyzing welded pipe attachments are explored. Making the right connection to the pipe is essential to prevent issues after plant operation and protecting the pressure boundary.