Pipe Pressure per ASME B31.3 (304.1.2)
The pressure rating of comparable pipe material to fitting material.
Pipe Pressure per ASME B31.3 (304.1.2) formula |
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| \(\large{ p = \frac{ 2\;t\;S\;Q\;W }{ d \;-\; 2\;t\;y } }\) | ||
| 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) | \(\large{ dimensionless }\) | |
