Copper Tube ASTM 280

Overview

Engineering reference data for Copper Tube ASTM 280 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	—

Temper Designations

ASTM B280 copper tubes are available in two temper conditions:

Temper	Also Called	Description
Drawn (D)	Hard, Rigid	Higher strength, less flexible
Annealed (A)	Soft, Flexible	Lower strength, more pliable

Tube Dimensions

Working Pressures

Design Properties

For working pressure calculations, the following yield strength values apply:

Temper	Yield Strength (S)
Annealed	$S = 5100 \text{ psi}$ (35 MPa)
Drawn	$S = 10000 \text{ psi}$ (69 MPa)

Pressure Rating Conditions

• Maximum service temperature: $T_{max} = 150°F$ ($66°C$)
• ACR tubes are designated by actual outside diameter (OD)
• Tubes are produced in straight lengths or coils

Interactive Charts

References

• Original Source