Nominal Standard Size inch

Outside Diameter inch

Wall thickness and tolerances(inch)

calculated Weight 1b/ft

Type K

K

Type L

L

Type M

M

Type K

Type L

Type M

WT

Tolerance

WT

Tolerance

WT

Tolerance

1/4"

0.375

0.035

0.0035

0.030

0.003

-

-

0.145

0.126

-

3/8"

0.500

0.049

0.005

0.035

0.004

0.025

0.002

0.269

0.198

0.145

1/2"

0.625

0.049

0.005

0.040

0.004

0.028

0.003

0.344

0.285

0.204

5/8"

0.750

0.049

0.005

0.042

0.004

-

-

0.418

0.362

-

3/4"

0.875

0.065

0.006

0.045

0.004

0.032

0.003

0.641

0.455

0.328

1"

1.125

0.065

0.006

0.050

0.005

0.035

0.004

0.839

0.655

0.465

11/4"

1.375

0.065

0.006

0.055

0.006

0.042

0.004

1.04

0.884

0.682

11/2"

1.625

0.072

0.007

0.060

0.006

0.049

0.005

1.36

1.14

0.940