Pipe take off chart

Even though it says medic for a screen name in was a pipefighter for 12 years. I do agree with Richard. It is a pain in the ass. When setting up the machine to be used make sure that the threads are not to deep or to shallow. The best is 2.5 to 3 turns once the tread starts to hand tight. This will give a you a consistent thread make up. To figure take off without a book thread a piece and give it say 6 inches form a mark on the pipe to the end of the thread. tread a 90 up and measure from the mark to the center of the 90. Coupling not much different just use two pieces one 6 inches long and a mark 6 inches on the longer piece. This can all be done on the threading machine. Pipe wrench and the machines motor to make it quick. You may loose a little pipe in the process but the name of the game. Go take your measurements and then do the takeoffs. Also make sure that after doing a couple of threads the threads are still the 2.5 to three threads to hand tight. Thread 10 pieces and check again. If the threader is worn out the threads will not be consistent and may be more than the 2.5 to 3 treads after one or two threads. If they are and you can't seem to get it adjusted right. Find another threader head or get a new one. I have seen them wore out and not hold the dies at a consistent depth.

Maybe this helps. I don't know. you may already know this.

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People often call us confused when they're shopping for tubing or trying to size pipe fittings for tubing. When they measure their pipe dimension, it reads 1-inch, but the 1-inch fitting ordered is too large and doesn't fit the pipe or tubing. John Woodard, our Master Water Specialist, explains nominal pipe size and how to find the right fittings based on pipe dimensions.

How to determine fitting size from pipe dimensions

In our industry, pipes and tubing are sized in two ways:

1. By the

   outer diameter (OD)

   for smaller fittings measuring 1/4, 3/8, or 1/2 inch
2. By the

   inner diameter (ID)

   . The ID size is referred to as CTS, which stands for copper tube size. CTS is based on the nominal size of a pipe.

What is nominal pipe size?

Nominal pipe size is the measurement based on the inner diameter rather than the actual diameter. When you're planning the plumbing for a house or another building, you calculate how much flow rate you need through the inner diameter of the tube or the pipe. The fittings used with those pipes measure larger than their labeled size because they connect over the outside of a plumbing pipe.

Contact us to discuss your requirements of pipe elbow. Our experienced sales team can help you identify the options that best suit your needs.

The size of OD tubing is typically marked in fine print on the side of the tube. If the tubing is sized by the OD, then you should look for fittings sized appropriately. For example, a 1/2 OD push-to-connect fitting goes with a 1/2 inch OD tube. But if you buy a 1/2 inch fitting designed for CTS (measured by ID) by mistake, then it won't fit properly. The CTS pipe fits nicely into a 1/2 inch CTS fitting.

When to use ID vs. OD fittings

CTS is actually available all the way down to 1/4 inch, although it's not used frequently. The most common CTS fittings are 1/2 inch, 3/4 inch, and larger sizes because they're used for household plumbing more frequently than ID nominal size parts. Smaller appliances, like under counter filters that run to your refrigerator or ice maker, use OD sized parts. 

How to measure pipe fittings

Measuring thread size may also be confusing. Threads are sized just like the CTS fittings. They're sized by the nominal size of the pipe, or the inner diameter. If you buy a 1/2 inch thread and measure the diameter, it will measure over 1 inch because it's designed to have a nominal pipe fitting. The female fitting should be sized just as large as the male fitting to get the right fit.

If you measure the actual thread size of a 1/2 inch fitting, then it will not actually measure 1/2 of an inch, even though that's what the part says.

To recap:

• ID tubing is based on the nominal size of the pipe rather than the actual measurement. 
• OD tubing is based on the outer diameter (the one you measure with a ruler) just like it sounds and fits into OD size tubing.

Learn more about pipe size and thread types from John.

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