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Pipe v Tube Sizes

Wall Thickness

1110-PD-001-0-00

Technical Information

Pipe dimensions of 12 inches and smaller have outside diameters numerically larger than the corresponding nominal sizes, whereas outside diameters of tubes are identical to nominal sizes. Pipe is identified by its nominal size. The manufacture of pipe in the nominal sizes of 1/8” to 12”, inclusive, is based on a standardized outside diameter.

Wall thickness designations of “standard,” “extra strong,” and “double extra strong” have been commercially used for years. Schedule numbers were subsequently added as a convenient designation for ordering pipe. Standard and Schedule 40 are identical for nominal pipe sizes up to 10”, inclusive. Larger standard sizes have 3/8” wall thickness.

Extra strong and Schedule 80 are idential for nominal pipe sizes up to 8”, inclusive. Larger sizes of extra strong have 1/2” wall thickness.

Nominal

O.D.

40

80

1/4”

0.540”

0.088”

0.119”

1/2”

0.840”

0.109”

0.147”

3/4”

1.050”

0.113”

0.154”

1”

1.315”

0.133”

0.179”

Wall Thickness

Barber-Colman Company, Loves Park, IL.

Page 8-11

Technical Information

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