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The Following Table Provides Information About the Dimensions of Several Types of Copper Water Tubing: Types K, L, and M

 

Nom

Size

Nominal Dimensions (in inches)

Type K

Type L

Type M

O.D.

I.D.

Wall

O.D.

I.D.

Wall

O.D.

I.D.

Wall
 

1/4  

0.375

0.305

0.035

0.375

0.315

0.03

   

 

   

 

  

 
 

3/8  

0.5

0.402

0.049

0.5

0.43

0.035

0.5

0.45

0.025
 

1/2  

0.625

0.527

0.049

0.625

0.545

0.04

0.625

0.569

0.028
 

5/8  

0.75

0.652

0.049

0.75

0.666

0.042

   

 

   

 

  

 
 

3/4  

0.875

0.745

0.065

0.875

0.785

0.045

0.875

0.811

0.032

1

1.125

0.995

0.065

1.125

1.025

0.05

1.125

1.055

0.035
 

1-1/4  

1.375

1.245

0.065

1.375

1.265

0.055

1.375

1.291

0.042
 

1-1/2  

1.625

1.481

0.072

1.625

1.505

0.06

1.625

1.527

0.049

2

2.125

1.959

0.083

2.125

1.985

0.07

2.125

2.009

0.058
 

2-1/2  

2.625

2.435

0.095

2.625

2.465

0.08

2.625

2.495

0.065

3

3.125

2.907

0.109

3.125

2.945

0.09

3.125

2.981

0.072
 

3-1/2  

3.625

3.385

0.12

3.625

3.425

0.1

3.625

3.459

0.083

4

4.125

3.857

0.134

4.125

3.905

0.11

4.125

3.935

0.095

5

5.125

4.805

0.16

5.125

4.875

0.125

5.125

4.907

0.109

6

6.125

5.741

0.192

6.125

5.845

0.14

6.125

5.881

0.122

8

8.125

7.583

0.271

8.125

7.725

0.2

8.125

7.785

0.17

10

10.125

9.449

0.338

10.125

9.625

0.25

10.125

9.701

0.212

12

12.125

11.315

0.405

12.125

11.565

0.28

12.125

11.617

0.254

Note: always check your local codes!

 

 

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Copper Tube Coils Group

Copper Water Tubing: What It Is, And When, Where, and How It is Used

 

Copper water tubing is used in the HVAC industry, for water plumbing, certain gasses such as liquified petrolem, compressed air, and others. Specifications for copper water tubing are provided by the ASTM (American Society for Testing and Materials), which provides the report ASTM B 88 | Standard Specification for Seamless Copper Water Tube.

 

 

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