Sanitary Fittings Dimensions

A lot of common errors can be made trying to determine the appropriate size for sanitary fittings. Use this complete guide to choose the right part for your needs

See our sizing guide below.

[Video transcription]
Hi, everybody. It’s John from Sanitary Fittings. You know, one of the most common questions I receive, and also one of the most frequent reasons for product returns, relates to the confusion about sanitary fitting tube sizes and what size to order for your application.

I thought I would put this video together to show you how to properly measure a sanitary tube fitting to eliminate some of the confusion around this process.

So as you can see here, I have a long weld clamp ferrule. We’ve got the flange end on one side followed by the tube end on the other side. What a lot of people do is measure the outside diameter of the flange end assuming that this is the sanitary fitting size. If you measured this one, you’d come up with a range right around two inches.
But that’s incorrect, that’s not the right spot to measure a sanitary fitting. The other mistake people make is to measure the inside diameter of the tube fitting but this is also incorrect.

The way to properly measure a sanitary tube fitting is the outside diameter of the tube end. So the best way to do this would be to lay this piece down on a piece of paper and trace a circle around the outside of the tube end. When you measure this, you’ll see that this sanitary fitting measures in at exactly an inch and one half. So the sanitary size for this particular long weld clamp ferrule is an inch and a half.

I hope this video helps and if you have any other questions please call or email me.


Sanitary Fitting Dimensions

The flange size, which is the same as the outside diameter, does not equal the sanitary fittings size.  In order to determine the correct sanitary fitting size required please note the Inside/Outside diameters per the sketch above and refer to the guide below.

Clamp Fittings and Gasket Sizing Guide

Sanitary SizeOutside Diameter (OD) of Clamp EndInside Diameter (ID) of Fitting
1 1/2″1.9841.370
2 1/2″3.0472.370


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