Hose clamp types and their limits of use

Technical explanation

Worm drive, heavy-duty or spring-loaded clamps are different designs. Not every design is suitable for every hose or for hazardous fluid applications. The clamping range of the clamp relates to the actual outside diameter of the hose on the fitting. Band width, edge design and screw arrangement also affect contact behavior. The manufacturer's torque and assembly restrictions should not be transferred to another product merely because the band width is the same.

Source: S029, S035, S036

Topic-specific checkpoints

Source: S029, S035, S036

How is it assessed in practice?

First determine the end assembly system permitted by the hose manufacturer. Check the dimension when fitted on the shank and the shank geometry, rather than the free hose outside diameter. If more than one clamp is needed, do not arbitrarily increase their number and position; follow the approved method. When a product is changed, re-evaluate the clamp, hose and fitting as a combination. Do not try to fix a leak on a pressurized line by trial tightening while it is live.

Original editorial recommendation; not a clause of a standard.

Frequently asked questions

Is using two clamps always safer?

There is no such general rule. The number and position must be determined according to the verified assembly method for the hose-fitting combination.

Source: S029, S035, S036