Seamless steel pipe weight calculation formula
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Seamless steel pipe weight calculation formula
The weight of the steel pipe = 0.25 × π × (OD  squared diameter squared) × L × steel gravity where: π = 3.14 L = length of pipe steel proportion taken 7.8, the weight of the steel pipe = 0.25 × 3.14 × (OD square  ID square) × L × 7.8 the size units fetch meters (M), the calculated weight results kilograms (Kg)
The density of steel: 7.85g/cm3
Steel theoretical weight
Steel theoretical weight measurement units kilograms (kg). The basic formula as:
W (weight kg) = F (sectional area mm2) × L (Length, m) × ρ (density, g/cm3) × 1/1000
The various steel theoretical weight calculated as follows:
Name (units)
The formula
Symbolic significance
Examples of calculations
Round steel rod (kg / m)
W = 0.006165 × d × d
d = diameter (mm)
100 mm diameter round bar, find the weight per m. Weight per m = 0.006165 × 1002 = 61.65kg
Rebar (kg / m)
W = 0.00617 × d × d
d = section diameter (mm)
The crosssectional diameter of 12 mm rebar, seeking weight per m. Weight per m = 0.00617 × 12 2 = 0.89kg
Square steel (kg / m)
W = 0.00785 × a × a
a = side width mm
Edge width of 20 mm square steel, find the weight per m. Weight per m = 0.00785 × 202 = 3.14kg
Flat steel
(Kg / m)
W = 0.00785 × b × d
b = side width mm
d = thickness mm
Edge width of 40 mm, 5mm thick flat steel, find the weight per m. Weight per m = 0.00785 × 40 × 5 = 1.57kg
Hexahedrons
(Kg / m)
W = 0.006798 × s × s
s = edge distance mm
Hexahedrons distance of 50 mm on the side, find the weight per m. Weight per m = 0.006798 × 502 = 17kg
Octagonal steel
(Kg / m)
W = 0.0065 × s × s
s = edge distance mm
Edge distance 80 mm the octagonal steel demand per m weight. Weight per m = 0.0065 × 802 = 41.62kg
Equilateral angle
(Kg / m)
= 0.00785 × [d (2b  d) +0.215 (R2  2r 2)]
b = edge width
d = edge thickness
R = inner arc radius
r = side arc radius
Seeking weight per m of 20 mm × 4mm equilateral angle. 4mm × 20 mm detected from metallurgical products directory equilateral angle R of 3.5 r 1.2 per m weight = 0.00785 × [4 × (2 × 20  4) +0.215 × (3.52  2 × 1.2 2 )] = 1.15kg
Unequal angle
(Kg / m)
W = 0.00785 × [d (B + b  d) +0.215 (R2  2 r 2)]
B = the long side width
b = short side width
d = edge thickness
R = inner arc radius
r = side arc radius
Weight per m seeking 30 mm × 20mm × 4mm unequal angle. Metallurgical products catalog to find out the 30 × 20 × 4 the unequal angle R 3.5, r 1.2 weight per m = 0.00785 × [4 × (30 + 20  4) +0.215 × (3.52  2 1.2 2)] = 1.46kg
Channel iron
(Kg / m)
W = 0.00785 × [hd +2 t (b  d) +0.349 (R2  r 2)]
h = high
b = leg length
d = waist thick
t = average leg thick
R = inner arc radius
r = side arc radius
Seeking weight per m of 80 mm × 43mm × 5mm channel. From the metallurgical Catalog, to detect the channel t 8, R 8, r 4, weight per m = 0.00785 × 80 × 5 +2 × 8 × (43  5) +0.349 × (824 2)] = 8.04kg
Hbeam (kg / m)
W = 0.00785 × [hd +2 t (b  d) +0.615 (R2  r 2)]
h = high
b = leg length
d = waist thick
t = average leg thick
R = inner arc radius
r = side arc radius
Find the Ibeam 250 mm × 118mm × 10mm Weight per m. Detected from the metallic material manual t of the Hbeam 13, R 10, r is 5, the weight per m = 0.00785 × 250 × 10 + 2 × 13 × (118 10) +0.615 × (102  5 2)] = 42.03kg
Steel plate (kg/m2)
W = 7.85 × d
d = thickness
Thickness of 4mm steel plate, find the weight per m2. Weight per m2 = 7.85 × 4 = 31.4kg
Steel pipe (including without
Pipe joints and welding
Steel pipe (kg / m)
W = 0.02466 × S (D  S)
D = outside diameter
S = wall thickness
An outside diameter of 60 mm wall thickness 4mm seamless pipe, find the weight per m. Weight per m = 0.02466 × 4 × (60 4) = 5.52kg
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