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Copper Tubes Type K - Dimensions and Physical Characteristics

Physical characteristics of copper tubes ASTM B 88 type K.

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Type K is a thick walled, flexible copper tubing - much thicker walls than Type L and M. Type K is required for underground installations and is used for water services, plumbing, heating, steam, gas and oxygen, oil and other applications where thick walled tubes are required. Type K copper tubing can be used with sweat, flared and compression fittings. Type K are available as hard and soft copper tubes.

Physical characteristics and data about copper pipes type K:

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Dimensions and Physical Characteristics of Copper Tube TYPE K
Nominal
or
standard
size
(inches)
Nominal dimensions (inches)
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Calculated values (based on nominal dimensions)
Outside
diameter
Inside
diameter
Wall
thickness
Cross
sectional
area of
bore
(square inches)
Weight
of tube
only
(lb/ft)

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Weight
of tube &
water
(lb/ft)

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Volume Contents of tube
(per linear foot)
Cubic feetGallon
1/4 0.375 0.305 0.035 0.073 0.133 0.177 0.00051 0.00379
3/8 0.500 0.402 0.049 0.127 0.269 0.324 0.00088 0.00660
1/2 0.625 0.527 0.049 0.218 0.344 0.438 0.00151 0.0113
5/8 0.750 0.652 0.049 0.334 0.418 0.562 0.00232 0.0174
3/4 0.875 0.745 0.065 0.436 0.641 0.829 0.00303 0.0227
1 1.125 0.995 0.065 0.778 0.837 1.18 0.00540 0.0404
1-1/4 1.375 1.245 0.065 1.22 1.04 1.57 0.00847 0.0634
1-1/2 1.625 1.481 0.072 1.72 1.36 2.10 0.0119 0.0894
2 2.125 1.959 0.083 3.01 2.06 3.36 0.0209 0.156
2-1/2 2.625 2.435 0.095 4.66 2.92 4.94 0.0324 0.242
3 3.125 2.907 0.109 6.64 4.00 6.87 0.0461 0.345
3-1/2 3.625 3.385 0.120 9.00 5.12 9.01 0.0625 0.468
4 4.125 3.857 0.134 11.7 6.51 11.6 0.0813 0.608
5 5.125 4.805 0.160 18.1 9.67 17.5 0.126 0.940
6 6.125 5.741 0.192 25.9 13.9 25.1 0.180 1.35
8 8.125 7.583 0.271 45.2 25.9 45.4 0.314 2.35
10 10.125 9.449 0.338 70.1 40.3 70.6 0.487 3.64
12 12.125 11.315 0.405 101 57.8 101 0.701 5.25
  • 1 in2 = 645 mm2
  • 1 Gallon (U.S.) = 3.785x10-3 m3 = 3.785 dm3 (liter)
  • 1 lbm = 0.4536 kg
  • 1 ft (foot) = 0.3048 m

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