Specified Minimum Yield Strength (SMYS)


Specified Minimum Yield Strength (SMYS) means the specified minimum yield strength for steel pipe manufactured in accordance with a listed specification. This is a common term used in the oil and gas industry for steel pipe used under the jurisdiction of the United States Department of Transportation. It is an indication of the minimum stress a pipe may experience that will cause plastic (permanent) deformation.

The equation for calculating SMYS is shown here.

Related formulas


SMYSSpecified Minimum Yield Strength (N/m2)
Ppressure (N/m2)
Dpipe’s outside diameter (m)
twall thickness (m)