Hydrostatic Test Pressure Flanges

Reference data and engineering information about hydrostatic test pressure flanges for fluid mechanics applications.

hydrostatictestpressureflanges

Overview

Engineering reference data for Hydrostatic Test Pressure Flanges in fluid mechanics.

Key Formulas

Reynolds Number

$Re = \frac{\rho v D}{\mu}$

Ratio of inertial to viscous forces — determines flow regime.

Bernoulli's Equation

$P + \frac{1}{2}\rho v^2 + \rho g h = \text{const}$

Conservation of energy for steady, inviscid, incompressible flow.

Continuity Equation

$A_1 v_1 = A_2 v_2$

Conservation of mass for incompressible flow.

Darcy-Weisbach

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

Pressure drop due to friction in a pipe.

Variables

Symbol	Description	Unit
$Re$	Reynolds number	—
$\rho$	Fluid density	kg/m³
$v$	Flow velocity	m/s
$D$	Characteristic dimension	m
$\mu$	Dynamic viscosity	Pa·s
$P$	Pressure	Pa
$f$	Darcy friction factor	—

Hydrostatic Test Pressure Reference Table

The table below provides hydrostatic test pressures in psig for common flanged fittings based on ASTM specifications and pressure class ratings.

8 rows

Hydrostatic test pressures (psig) for flanged fittings by ASTM specification and pressure class.
ASTM Specification	Class 150(psig)	Class 300(psig)	Class 400(psig)	Class 600(psig)	Class 900(psig)	Class 1500(psig)	Class 2500(psig)
A105, A216-WCB, A350-LF2, A515-70, A516-70, A537-C1.1, A675-70, A672-B70, A672-C70, A696 Grade C	450	1125	1500	2225	3350	5575	9275
A106-C, A203-B, A203-E, A216-WCC, A350-LC3, A352-LCC, A352-LC2, A352-LC3	450	1125	1500	2250	3375	5625	9375
A203-A, A203-D, A352-LCB, A515-65, A516-65, A675-65, A672-B65, A672-C65	400	1050	1400	2100	3150	5225	8700
A106-B, A350-LF1, A515-60, A516-60, A672-B60, A672-C60, A675-60, A696 Grade B	375	950	1250	1875	2775	4650	7725
A182-F1, A204-A, A204-B, A217-WC1, A352-LC1, A691-CM70	400	1050	1400	2100	3150	5225	8700
A182-F2, A204-C, A217-WC4, A217-WC5, A691-CM75	450	1125	1500	2250	3375	5625	9375
A182-F12, A182-F11, A217-WC6, A387-11C1.2, A739-B11	450	1125	1500	2250	3375	5625	9375
A182-F304, A182-F304H, A240-304, A240-304H, A312-TP304, A312-TP304H, A351-CF3, A351-CF8, A479-304, A479-304H	425	1100	1450	2175	3250	5400	9000

Source: Engineering Toolbox

Interactive Charts

Hydrostatic test pressures (psig) for flanged fittings by ASTM specification and pressure class.

References

Original Source

Source: engineeringtoolbox.com