Speed Wrap<sup>®</sup> - The Next Generation in Pipe Insulation Follow Speed Wrap<sup>®</sup> on Twitter
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Buying insulation for your pipes seems like it should be simple, right? Not always. It turns out that it can be frustratingly complicated. There are pipe sizes, tube sizes, outside diameters, inside insulation diameters, etc., etc. We feel your pain and hopefully we can help you get the right size insulation for your application.

Different sizing systems?

There are two common sizing systems, and we'll briefly explain both of them. However, instead of a long history lesson, we'll focus on helping you find what you need.

What you really need to know

We want you to feel confident when you go to order pipe insulation. Speed Wrap® is sold according to the pipe or tube size you are insulating. We know that our customers don't always know what size their pipe is, so we have some tips on how to find exactly what size you have. Choose the method you prefer, and use the conversion chart below to correspond your measurement to the pipe size or tube size you have. You may find that your measurement has a pipe size and a tube size; that's fine - choose either one and you will get insulation that will fit your pipes and fittings.

Method 1: Find the Circumference

Circumference is the distance it takes to go around the pipe once. If you have a cloth tape measure, wrap the tape around the pipe once and measure to the nearest 1/8 of an inch. You can also wrap a string (or paper or similar) around the pipe once, mark the length, and lay it flat on a ruler and measure the length. Once you have found the circumference, use the chart below to find your pipe or tube size.

Measuring Circumference with a cloth tape

Method 2: Find the Outside Diameter

This is only recommended if you have a caliper. Without a caliper, it is very difficult to get a measurement with any accuracy. If you have one using a caliper an effective way to find your outside diameter. Once you have found the outside diameter, use the chart below to find your pipe or tube size.

Measuring Outside Diameter using a calipers

 

Pipe and Tube Size Conversion Chart

Using the pipe measurement method of your choice from above, find either the Circumference or Outside Diameter of your pipe (measure to the nearest 1/8th of an inch). Once you have found either the Circumference or Outside Diameter, find the closest measurement on the chart below in the column that corresponds to your measurement method (Circumference or Outside Diameter). After you find the corresponding measurement, work your way across the chart to find either your Pipe Size or Tube Size. Please note that some measurements have a Pipe Size and a Tube size; you can choose either the Pipe Size or Tube size because we use the same size pipe insulation to fit Pipe and Tube sizes that have the same measurements.

 

Circumference Outside Diameter Pipe Size Tube Size
1 1/4 3/8 1/8 1/4
1 5/8 1/2 1/4 3/8
2 1/8 5/8 3/8 1/2
2 3/8 3/4   5/8
2 3/4 7/8 1/2 3/4
3 1/4 1 3/4  
3 1/2 1 1/8   1
4 1/4 1 3/8 1 1 1/4
5 1/8 1 5/8 1 1/4 1 1/2
6 1 7/8 1 1/2  
6 5/8 2 1/8   2
7 1/2 2 3/8 2  
8 1/4 2 5/8   2 1/2
9 2 7/8 2 1/2  
9 7/8 3 1/8   3
11 3 1/2 3  
11 1/2 3 5/8   3 1/2
12 5/8 4 3 1/2  
13 4 1/8   4
14 1/8 4 1/2 4  
16 1/8 5 1/8   5
17 1/2 5 5/8 5  
19 1/4 6 1/8   6
20 7/8 6 5/8 6  
27 1/8 8 5/8 8  
33 3/4 10 3/4 10  
40 12 3/4 12  
44 14 14  
50 1/4 16 16  
56 1/2 18 18  
62 7/8 20 20  
69 1/8 22 22  
75 3/8 24 24  
81 5/8 26 26  
88 28 28  
94 1/4 30 30  
100 1/2 32 32  
106 7/8 34 34  
113 1/8 36 36  

 

If you are still having trouble finding your size, please do not hesitate to contact us. Email us at info@speedwrap.com, or call us at 866-877-2812.