How To Determine

Nominal Size for your Hose
Clamp Application

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Using Dial Calipers Use dial calipers to measure the outside diameter (O.D.) of the hose and fitting application with the hose assembled on the pipe or tube fitting as shown in illustration 1a. Use this measurement to specify the nominal clamp size. OR

Using Tape Rule Use a narrow tape rule to measure the circumference of the hose and fitting application with the hose assembled on the pipe or tube fitting as shown in illustration 1b. Denote this as circumference, (c). Use the formula: Nominal Application Diameter ND = c ÷ 3.1416 OR

Using "Pi" Tape Rule Use a "pi" tape rule to measure the O.D. of the hose and fitting application with the hose assembled on the pipe or tube fitting as shown in illustration 1c. Use this measurement to specify the nominal clamp size.

First Use dial calipers to measure the O.D. of the pipe or tube fitting as shown in illustration 1d. This diameter may also be measured with a narrow tape rule or "pi" tape rule as shown in illustrations 1b and1c. Denote this dimension as diameter, (d). Second Use dial calipers to measure the material thickness of the hose as shown in illustration 1e. Denote the thickness dimension as thickness, (t). Use the formula: Nominal Application Diameter ND = d + ( 2 x t )