FORMULAS & TUBING / PIPE INFORMATION

CIRCUMFERENCE of a CIRCLE 

3.1416  X  Diameter

ALUMINUM WEIGHS 35% OF STEEL 

Weight of steel  X  .35 =  Weight of Aluminum

Weight of Aluminum  X  2.857 =  Weight of steel

MAGNESIUM WEIGHS 22% OF STEEL 

Weight of steel  X  .22 =  Weight of Magnesium

Weight of Magnesium  X  4.545  =  Weight of steel

TITANIUM WEIGHS 57% OF STEEL 

Weight of steel  X  .57 =  Weight of Titanium

Weight of Titanium  X  1.754 =  Weight of steel

HANDY WEIGHTS 

WATER

8.33 lbs. GAL.

GASOLINE

6.20 lbs. GAL.

OIL

7.00 lbs. GAL

ALCOHOL

6.60 lbs. GAL

 TO FIND GALLONS of a TANK

LENGTH  X  WIDTH  X  HEIGHT  divided by  231

METRIC CONVERSIONS

Multiply Inches  X  25.4  to get Millimeters

Multiply Millimeters  X  .03937 t o get Inches

WEIGHT of STEEL TUBING in LBS. PER  FOOT

10.6802   X  Wall Thickness X  ( Diameter - Wall Thickness )

YIELD STRENGTH COMPARISONS ( approximate psi )

Mild Steel Tube

 40,000 psi

Black Iron Pipe

 47,000 psi

Stainless Steel

 65,000 psi

4130 Chromoly

101,000 psi

AMOUNT OF TUBING USED TO MAKE A BEND

Center Line Radius ( CLR ) X  Degree of Bend ( DOB ) X .01745