* ASME B31.3 requires the use of vent holes at branch connection reinforcing pads. ![]() Should not be used on lines subject to acoustic fatigue.Corrosion mechanism still occurs which can lead to jacking up.Prevents wear of pressure boundary (and reinforces against heavy load).Subject to ingress of moist air through vent hole.Fluid temperature can affect support steel.Can result in galvanic action for dissimilar material contact.Corrosion product can eventually cause jacking up of pipe.Can lead to dangerous wall loss at pressure boundary.Can trap moisture under pipe leading to further coating breakdown and crevice corrosion.If you prefer to skip to the end, you will find a summary of the better solutions and a discussion of my own preference. The major issues are covered in dot-point form with further explanation as required. This article is geared mainly towards uninsulated carbon steel piping and the problem of corrosion at the contact point. Early on in detail design, the responsible party should prepare a flow-chart specifying the intended pipe support selection for each application. Too often, this aspect of piping design is not given enough thought, resulting in problems later on in the life of a facility. There are many ways to go about supporting pipe, from putting it straight on steel to sophisticated sliding shoe designs.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |