The formula for calculating pipe weight is m=10.68 (d_{o} – t_{w}) t_{w} , where m is weight per foot (lbs/ft), d_{o} is outside diameter in inches, and t_{w} is wall thickness in inches. The outside diameter and wall thickness of the pipe are required to calculate the weight per foot. The formula doesn’t take into account weight alterations after end finishing, e.g., upsetting or threading.
Know MoreThe weight-per-foot of a 4-inch steel pipe with an outside diameter of 4.5 inches and wall thickness of 0.237 is calculated as follows: m = 10.68 ((4.500 in) - (0.237 in)) (0.237 in), m=10.79 lbs/ft. The weight, wp, of an empty pipe per unit length (kg, lb) is given by w_{p} = ρ_{m} _{A}m
= ρ_{m} (π (d_{o} / 2)_{2} - π (d_{i} / 2)^{2})
= ρ_{m} π (d_{o}^{2} - d_{i}^{2}) / 4
The weight of liquid in a pipe per unit length is given by:
w_{l} = ρ_{l} A
= ρ_{l} π (d_{i} / 2)^{2}
= ρ_{l} π d_{i}^{2} / 4.
The weight of a pipe and the liquid in it per unit length is given by w_{p} + w_{l}.
Learn more about AlgebraThe volume of a pipe that is 1 foot long and 6 inches in diameter is 0.2 cubic foot. This correlates to approximately 1.5 gallons of standing water potentially inside the pipe.
Full Answer >When like terms with exponents are multiplied, the number of times the term is multiplied by itself is increased by the additional number of times indicated by the second exponent. Therefore, the product is found by adding the exponents together.
Full Answer >The identity of the first person to discover that the ratio between the diameter and the circumference of a given circle is a constant will probably never be known. The search for that constant, commonly known as pi, goes back nearly 4,000 years, to the Egyptians and Babylonians.
Full Answer >According to Math Open Reference, pi is a mathematical constant obtained by dividing the circumference of any circle by its diameter. Pi is about 22/7 or 3.142. However, no one knows its exact value.
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