|
To find the circumference of
a circle: |
|
To find the diameter of a circle:
|
Multiply the radius by
6,2832 or Multiply the diameter by 3,1416 or Multiply the
square root of the area by 3,5449
|
|
Multiply the radius by 2.00
or Multiply the circumference by .15915 or Multiply the
square root of the area by 1.1284
|
|
To find the radius of a
circle: |
|
To find the
area of a circle:
|
Multiply the diameter by
.500 or Multiply the circumference by .15915 or Multiply
the square root of the area by .566419
|
|
Multiply the square of the
radius by 3.1416 or Multiply the square of the
diameter by .7854 or Multiply the square of the
circumference by .07958
|
|
To find the area of a hexagon:
|
|
To find the
area of a triangle:
|
Multiply the square of the
distance across by .82843 or Multiply the area of the
inscribed circle by 1.0548
|
|
Multiply the base by
one-half the perpendicular height
|
|
To find the area of a
rectangle: |
|
To find the side of an
inscribed square: |
Multiply the length by
width
|
|
Multiply the diameter by
.7071 or Multiply the circumference by .2251 or
Divide the circumference by 4.4428
|
|
To find the side of an equal
square: |
|
Multiply the diameter by
.8862 |
|
|
|
|
|
To find the diameter of the
circumscribing circle of a square: |
|
To find the circumference of
the circumscribing circle of a square: |
Multiply a side by 1.4142
|
|
Multiply a side 4.443
|
|
To find the cubic contents of
a cone: |
|
To find the area of an
ellipse: |
Multiply the area of the
base by one-third the altitude
|
|
Multiply the product of its
axis by .7854 |
|
To find the area of a
parallelogram: |
|
To find the volume of a
parallelogram: |
Multiply the base times the
perpendicular height
|
|
Multiply the area of cross
section times the length
|
| |
|
|
|
To find the area of a
cylinder: |
|
To find the volume of a
cylinder: |
Multiply the length
times the circumference of the body plys the area of both
ends
|
|
Multiply the area of the
base by the perpendicular height
|
|
To find the volume of a
sphere: |
|
To find the area of sphere: |
Multiply
the cube of the diameter by .5236
|
|
Multiply the square of the
diameter by 3.1416 or Multiply the diameter times the
circumference |
|
To find the
capacity of a tank in gallons:
(all measurements must be reduced to inches)
|
|
For cylindrical tanks :
|
|
multiply
the length of the square of the diameter by .7854 and
divide by 231 |
|
For
rectangular tanks : |
|
multiply
the length by the width by the depth and divide by 231 |
|
For
elliptical tanks : |
|
multiply
the length by the short diameter by the long diameter
by .0339 and divide by 231 |
| |
|
A gallon
of water (US Standard) weighs eight and one-third (8
1/3) pounds and contains 231 inches. |
|
| |
|
|
|
To find the
maximum internal working pressure of tubular products using
Barlow's formula? |
|
P-(2St)/D |
| Where: |
| P=
Bursting Strength |
| S=
Ultimate strength (tensile) of the tube materials. |
| t=
Tube wall thickness in inches. |
| D=
Outside diameter of tube in inches |
| |
|
Divide P as computed
above by the safety factor usually used to determine
the maximum safe internal working pressure. The safety
factor to be used is normally determined by the
operating condition. |
|
| |
|
Operating
Conditions |
Factor of Safety |
|
Steady,
gradually increasing pressure |
4 |
|
Sudden
change (0 to Max) in pressure |
5 |
|
Vehement
pulsations |
6 |
| |
|
|
A standard
horsepower is the evaporation of 30 pounds of water
per hour from a feed-water temperature of 100 degrees
Fahrenheit into steam at 70 pounds gauge pressure.
|
|
| |
|
To find the pressure in
pounds per square inch of column of water: |
|
To ascertain the heating
surface in tubular boilers: |
Multiply
the height of the column in feet by .434
Doubling the diameter of a pipe, increases it's capacity
four times.
|
|
Multiply
2/3 the circumference of the boiler by length of boiler in
inches and add it to the area of all tubes.
|
|
Disclaimer: Calculations to be used for rough estimates
only.
|
|
Quantities may vary based on product type and sizes. |
| |
|
|
