Threaded Socket Welded Fittings

Overview

Engineering reference data for Threaded Socket Welded Fittings in piping systems.

Key Formulas

Continuity

$A_1 v_1 = A_2 v_2$

Mass conservation in pipe flow.

Pressure Drop

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Darcy-Weisbach equation.

Pipe Area

$A = \frac{\pi D^2}{4}$

Cross-sectional area of a pipe.

Variables

Symbol	Description	Unit
$D$	Pipe diameter	m
$v$	Flow velocity	m/s
$\Delta P$	Pressure drop	Pa
$f$	Friction factor	—

Pipe Schedule and Pressure Class Details

• Pipe Schedule: A numerical designation assigned to different pipe wall thicknesses (e.g., Schedule 80). Common schedules include Standard (STD), Extra Strong (XS), and Double Extra Strong (XXS).
• Fitting Availability:
  • Threaded fittings are available in pressure classes 2000, 3000, and 6000.
  • Socket-welded fittings are available in pressure classes 3000, 6000, and 9000.

References

• Original Source