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Yes, there is. Pipe and tube outside diameters are measured differently. Which results in the need for different bore diameters for each. As an example an ¼ inch tube clamp would require a 0.25 “(6.4mm) bore where a ¼ pipe clamp would require a 0.54 “ (13.7mm) bore diameter. A chart can be found in our online catalog for these dimensions under the clamp section-DIN 3015 clamps.