How To Measure Pipe Size. Mark the point where the string touches together; The dimension in column 3 will be your nominal pipe thread size.
In most cases, this will be 7 to 8 inches. 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; Mark the point where the string touches together;
As shown in the picture above, measure the circumference (outer diameter) of your pipe or pipe fitting by using the below steps wrap a string around the.
How to measure pipe diameter size free tool download! Once you have the od of your pipe, you can convert it using a nominal diameter chart to find the threads per inch. Type k has the thickest wall, followed by This gives you the pipe's outside diameter.