What is the OD of 1 1 4 black pipe?
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			SCH 40 Bare & Black Standard Steel Pipe
 | Item # | Size | Outside Diameter | 
|---|---|---|
| SCH 40 Pipe-1 | 1 in | 1.315 in | 
| SCH 40 Pipe-1 1/4 | 1 1/4 in | 1.660 in | 
| SCH 40 Pipe-1 1/2 | 1 1/2 in | 1.900 in | 
| SCH 40 Pipe-2 | 2 in | 2.375 in | 
Also question is, what is the OD of 1 1 4 pipe?
OUTSIDE DIAMETER
- Wrap a string around the pipe.
- Mark the point where the string touches together.
- Use a ruler or measuring tape to find the length between the tip of the string and the mark you made (circumference)
- Divide the circumference by 3.14159.
Likewise, what is the OD of 1 black pipe?
SCH 40 Bare & Black Standard Steel Pipe
| Item # | Size | Outside Diameter | 
|---|---|---|
| SCH 40 Pipe-1 | 1 in | 1.315 in | 
| SCH 40 Pipe-1 1/4 | 1 1/4 in | 1.660 in | 
| SCH 40 Pipe-1 1/2 | 1 1/2 in | 1.900 in | 
| SCH 40 Pipe-2 | 2 in | 2.375 in | 
Steel Pipe Specifications Schedule 40
| Nominal Size (IPS) | Diameter External (Inches) | Wall Thickness (Inches) | 
|---|---|---|
| Diameter Internal(Inches) : .824 Wall Thickness(Inches) : .113 Weight Per Foot Plain Ends(Pounds) : 1.130 Internal Area(Sq. In.) : .533 GPM at 10 ft/sec(Velocity) : 16.6 | ||
| 1" | 1.315 | .133 | 
| 1-1/4" | 1.660 | .140 | 
| 1-1/2" | 1.900 | .145 |