Consider the need to add friction reducing slides between the piping and support steel.Provide space for adding loops to piping near load sensitive equipment, e.g.As much as possible, attach supports to straight pipe rather than elbows, other fittings, Valves, flanges or instruments, but provide supports near instruments, and other devices that are likely to be removed for maintenance.Following rules of thumb will help when doing the flexibility analysis and operation and maintenance. Support locations are dependent on many considerations, such as pipe size, piping configuration, the location of heavy Valves and fittings, and the structure that is available for support. MSS SP-90 Guidelines on Terminology for Pipe Hangers and Supports.MSS SP-89 Pipe Hangers and Supports -Fabrication and Installation Practices.MSS SP-77 Guidelines for Pipe Support Contractual Relationships.MSS SP-69 ANSI/MSS Edition Pipe Hangers and Supports - Selection and Application.MSS SP-58 Pipe Hangers and Supports - Materials, Design, and Manufacture.ASME 31.1 and 31.3 ie Power Piping and Process Piping.Excessive heat flow, exposing supporting elements to temperature extremes outside their design limits.Excessive distortion or sag of piping (e.g., thermoplastics) subject to creep under conditions of repeated thermal cycling.Excessive piping sag in piping requiring drainage slope.Unintentional disengagement of piping from its supports.Excessive interference with thermal expansion and contraction in piping which is otherwise adequately flexible.Resonance with imposed or fluid-induced vibrations.Excessive stresses in the supporting (or restraining) elements.Excessive thrusts and moments on connected equipment (such as pumps and turbines).
#ANVIL PIPE SUPPORTS CODE#
Piping stresses in excess of those permitted in the Code.The code ASME B 31.3 specifies under clause 321.1.1 the ayout and design of piping and its supporting elements shall be directed toward preventing the following.
Proper support selection should be the objective of all phases of design and construction. The correct and economical selection of the supports for any piping system usually presents difficulties of varying degrees, some relatively minor and others of a more critical nature. Structural attachments are elements that are welded, bolted, or clamped to the pipe, such as clips, lugs, clamps, clevises, and stops. They include rod hangers, spring hangers, sway braces, turnbuckles, struts, anchors, saddles, rollers, brackets, and sliding supports. Pipe supports and hangers are devices which transfer the loads from the pipe or the structural attachment to the supporting structure or equipment. The pipe may be secured to this member with a pipe support.
Pipe is rested on or secured to a support member usually of a standard structural shape (I-beam, wide flange beam, angle, channel etc.). The designs are only limited by the imagination of the engineer and designer, as literally thousands of different designs have been used for special purposes. There are a number of typical pipe supports that can be installed to support dead weight loads, and restrain the pipe for thermal and dynamic loads. Hangers are also referred to as supports. Pipe is held either from above by hangers or supports of various types on which it rests.
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