Hose Clamps — The Clamp End of the Couplings Line

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A small entry with one job

The couplings line on this site is covered as a whole on the hose couplings page: camlock couplings first, plus flanges, air hose couplings and clamps. The clamp entry is the humblest of the four. Its job is singular — to hold a hose onto a tail or a spigot against the pressure trying to push it off — and everything about ordering one follows from that job: the clamp is sized not to the hose's bore but to the hose's outside diameter over the fitting it clamps, it is tightened by a stated mechanism, and its band and screw materials decide how it survives the environment the joint lives in.

General background, stated as general knowledge rather than company data: hose clamps are made in several tightening formats — worm-drive band clamps are the general-purpose form, with bolted and ear-style formats used where vibration, pressure or a permanent joint argues for them — and in band materials that trade price against corrosion life. None of that is a stock list for this line: no clamp sizes, formats or materials for this entry are published in the company's data. The general background tells you which facts an enquiry has to carry; the quotation tells you which clamps answer them.

What a clamp order is specified against

• Hose outside diameter over the tail: the dimension the clamp actually closes on — hose OD plus the fitting it sits over — stated from the hose and coupling in the same order.
• Pressure and duty: the joint's working pressure and whether the line is suction, delivery or both; a joint that must hold vacuum and pressure is specified as such.
• Tightening format: the format your maintenance practice uses, named in the enquiry, so the supplied clamps take the tools your fitters already carry.
• Band and screw material: the environment decides — washdown, outdoor, marine air and chemical splash are different material questions, each stated in the enquiry.
• Quantity logic: clamps travel with hose and coupling orders — per joint, per spare, per kit — so state whether they are kitting with assemblies or stocking as spares.

In practice, clamps on this range are ordered the way the couplings page recommends the whole line be ordered: as part of a hose programme, in the same enquiry as the hose and the couplings they will close on, so one document carries the sizes that have to agree. Order clamps in the same enquiry as the hose, and state the outside diameters they must close on, so the matched sizes are confirmed in the same quotation; a standalone clamp enquiry should carry the same facts — hose build, bore, outside diameter, fitting — because without them the clamp cannot be specified at all.

What size clamp fits my hose?

Clamp size follows the hose's outside diameter over the fitting it clamps, not the nominal bore. State the hose build and bore in the enquiry — or order clamps with the hose — and the matched size is confirmed in the quotation.

Are clamps supplied with the hose?

State in the enquiry whether you want clamps kitted with the hose and couplings, fitted assemblies, or clamps as separate spares; supply format for this entry is confirmed per order.

Which clamp material should I order?

That is set by the joint's environment — state where the joint lives (washdown, outdoor, marine, chemical) in the enquiry and ask for the offered band and screw materials to be stated in the quotation.