MSS SP‑69 is structured to guide the user logically through the selection and application process. The 20‑page document is organised into the following sections:
For engineers, specifiers, and procurement professionals, the need for reliable, standardised guidance on selecting and applying these supports is absolute. This need is met by a family of standards developed by the Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry. One of the most significant among these is MSS SP‑69.
304 or 316 Stainless Steel is standard to combat salt air and corrosive chemical vapors. Recommended Pipe Support Spacing
MSS SP-69 isn't just about "hooks and wires." It categorizes piping systems based on intense real-world variables: mss sp 69 pdf
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The support must be rated for the maximum combined design load, which includes: The weight of the pipe, valves, and inline fittings. The weight of the fluid content during operation.
Used where vertical thermal movement occurs, preventing the piping from lifting off its support or overloading the system. 2. Maximum Support Spacing MSS SP‑69 is structured to guide the user
Pipe material (carbon steel, stainless steel, plastic, copper). Pipe size and wall thickness. The weight of the fluid being transported.
– As described above, this standard tells the user how to select the right type of support and how far apart to place them.
: Materials in contact with pipes must be compatible to prevent corrosion or electrolysis. One of the most significant among these is MSS SP‑69
: It categorizes systems by operating temperature—Hot (above ), Ambient ( ), and Cold (below
Allow axial movement along the length of the pipe but prevent lateral (side-to-side) shifting. Critical Selection Criteria Under MSS SP-69
This is a critically practical section of the standard. MSS SP-69 defines accepted maximum support spans for various piping materials and sizes. These spans are determined by the pipe's characteristics and the type of hanger used. For instance, spans for small-bore pipes can be as short as 6 feet, while large-bore pipes may have spans as long as 20 feet. Proper spacing is essential to prevent pipe sagging, excessive stress, and potential failure.
Originally approved by MSS in July 1966, the document has been revised several times to keep pace with evolving industry practices. The most widely circulated edition is , which was approved as an American National Standard in March 2004.