The variation in support force must not transfer excessive loads to adjacent equipment or overstress the pipe. 3. Constant Support Hangers
: The overarching codes for power and process piping that often mandate compliance with MSS standards.
: Ensuring support materials don't cause corrosion or electrolysis when touching the pipe. mss sp 69 pdf
This question requires a careful answer because the situation is nuanced.
The PDF cross-references MSS SP-58, but contains summarized tables of: The variation in support force must not transfer
While SP-69 dictates how to select and apply supports, SP-58 specifies how manufacturers must design and build them. (Note: In recent revisions, the MSS has integrated elements of SP-69, SP-77, SP-89, and SP-90 into a single, comprehensive MSS SP-58 mega-standard, though many specifications and contracts still reference SP-69 directly).
To ensure you are using the most accurate, legal, and updated guidelines, the standard should be purchased directly via authorized distributors such as the official website, ANSI , or IHS Markit . : Ensuring support materials don't cause corrosion or
A few specific purchase channels deserve mention:
One of the most heavily referenced sections of the standard is the pipe support spacing table. It outlines the maximum recommended horizontal span between hangers based on: Pipe material (Steel, Copper, Plastic, Ductile Iron). Pipe size (Nominal Pipe Size / NPS). Contents of the pipe (Water service vs. Vapor/Gas service).
Standard two-bolt or three-bolt friction clamps wrap tightly around the bare pipe surface to transfer loads up to the supporting structure.