Pipe Pressure per ASME B31.3 (304.1.2)

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The pressure rating of comparable pipe material to fitting material.

 

Pipe Pressure per ASME B31.3 (304.1.2) formula

\(\large{ p = \frac{ 2\;t\;S\;Q\;W }{ d \;-\; 2\;t\;y }  }\) 
Symbol English Metric
\(\large{ p }\) = pressure rating \(\large{\frac{lbf}{in^2}}\)   \(\large{Pa}\)
\(\large{ S }\) = allowable stress \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ y }\) = ASME B31.3, Table 304.1 \(\large{\frac{lbf}{in^2}}\)   \(\large{Pa}\)
\(\large{ Q }\) = quality factor \(\large{ dimensionless }\)
\(\large{ t }\) = wall thickness of pipe \(\large{ in }\) \(\large{ mm }\)
\(\large{ W }\) = weld joint strength reduction factor ASME B31.3 Para. 302.3.5(e) (Typically = 1.0) \(\large{ dimensionless }\)

 

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Tags: Pipe Pressure