En 1075 Copper Tubes

Overview

Engineering reference data for En 1075 Copper Tubes 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	—

Material Properties

Temper Designations

Copper tubes according to EN 1057 are available in three material tempers, each with distinct mechanical properties:

EN 1173 Property Letter Symbols

Symbol	Property
A	Elongation
B	Spring bending limit
G	Grain size
H	Hardness (Brinell for castings, Vickers for wrought products)
M	(as) Manufactured, i.e. without specified mechanical properties
R	Tensile strength (e.g., R220 = 220 MPa)
Y	0.2% proof strength

---

Tube Dimensions

Plain Straight Tubes — R250 Half Hard & R290 Hard

Plain Coils — R220 Annealed (Soft)

Chrome Plated Tubes — R250 Half Hard & R290 Hard

Interactive Charts

References

• Original Source