Iron Threaded Fittings

Reference data and engineering information about iron threaded fittings for piping systems applications.

ironthreadedfittings

Overview

Engineering reference data for Iron Threaded Fittings in piping systems.

$A_1 v_1 = A_2 v_2$

Mass conservation in pipe flow.

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

Darcy-Weisbach equation.

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

Cross-sectional area of a pipe.

10 rows

Pressure-Temperature Ratings for Malleable Iron Threaded Fittings
Temperature(°F)	Temperature(°C)	Class 150 1/4 - 1 inch(psig)	Class 300 1/4 - 1 inch(psig)	Class 300 1 1/4 - 2 inch(psig)	Class 300 2 1/2 - 3 inch(psig)
-20	-29	300	2000	1500	1000
150	66	300	2000	1500	1000
200	93	265	1785	1350	910
250	121	225	1575	1200	825
300	149	185	1360	1050	735
350	177	150	1150	900	650
400	204	-	935	750	560
450	232	-	725	600	475
500	260	-	510	450	385
550	288	-	300	300	300

Source: engineeringtoolbox.com

This standard covers requirements for Classes 150 and 300 threaded malleable iron fittings, including: