Water Content Steel Copper Pipes Tubes

Reference data and engineering information about water content steel copper pipes tubes for piping systems applications.

watercontentsteelcopper

Overview

Engineering reference data for Water Content Steel Copper Pipes 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	—

Steel Pipes Water Content Data

6 rows

Water content volume per foot of length for standard steel pipes.
Nominal Pipe Size(in)	Schedule 40(gal/ft)	Schedule 80(gal/ft)
1/8	0.003	0.0019
1/4	0.0054	0.0037
3/8	0.0099	0.0073
1/2	0.0158	0.0122
3/4	0.0277	0.0225
1	0.0449	0.0374

Source: engineeringtoolbox.com

Copper Tubes Water Content Data

7 rows

Water content volume per foot of length for standard copper tubes.
Nominal Pipe Size(in)	Type K(gal/ft)	Type L(gal/ft)	Type M(gal/ft)
1/8	0.0014	0.0016	0.0016
1/4	0.0039	0.004	0.0043
3/8	0.0066	0.0075	0.0083
1/2	0.0113	0.0121	0.0132
5/8	0.0173	0.0181	0.0194
3/4	0.0226	0.0251	0.0268
1	0.0404	0.0429	0.0454

Source: engineeringtoolbox.com

Unit Conversions

$1\ \text{in} = 25.4\ \text{mm}$
$1\ \text{ft} = 0.3048\ \text{m}$
$1\ \text{Gallon (U.S.)} = 3.785 \times 10^{-3}\ \text{m}^3 = 3.785\ \text{dm}^3\ (\text{liter}) = 231\ \text{in}^3 = 0.13368\ \text{ft}^3$

Explanation & Application

The tables provide the internal volume of water (or other fluid) contained within a pipe per linear foot. This is critical for:

System filling calculations
Thermal expansion estimates
Pump sizing and system commissioning

How to Use: To find the total water volume for a pipe run, multiply the value from the table (gal/ft) by the total pipe length in feet.

Calculation Example: For a 50 ft run of 3/4" Schedule 40 steel pipe: $\text{Volume} = 0.0277\ \frac{\text{gal}}{\text{ft}} \times 50\ \text{ft} = 1.385\ \text{gallons}$

Key Definitions:

Nominal Pipe Size (NPS): A dimensionless designation of pipe size, related to but not equal to the actual physical diameter.
Schedule: Indicates the wall thickness of the pipe. Higher schedule numbers have thicker walls, resulting in a smaller internal bore and less water content per foot.