How do I Measure the Size of a Hose Clamp?
Commonly referred to as German type hose clamps, Jubilee clamps are high-torque worm gear type hose clamps. They feature a clamp with spiral-threaded screws or worm gears. As the screw turns, it pulls on the threaded band via worm gear transmission, thereby tightening the band around the hose or pipe.
German type hose clamps provide strong clamping force and are considered heavy-duty hose clamps, typically available in stainless steel or carbon steel materials. They are an ideal choice when space is limited or the location is difficult to access. However, they are not recommended for softer hoses or silicone hoses.
Applications:
- Reinforced pipes
- Automotive fuel lines and exhaust pipes
- Plumbing system - sealing pipes,water pipes, boat bilge outlets
- Marking, temporary repair, sealing large containers
Measurement of Hose Clamp Sizes:
The term "hose clamp size" refers to the minimum to maximum diameter securing range.
1. Determine the Outer Diameter (OD) of the Hose: Ensure accurate measurement by installing the hose onto the fitting.
2. Use calipers to measure the OD of the hose and fitting. If calipers are unavailable, use the following formula:
Outer Diameter = Circumference / π (3.1416)
It is advisable to select a hose clamp based on the midpoint of its adjustable range. Below are some SAE standards for F-type German hose clamps. These typically have a 1/2-inch band width and a 5/16-inch slotted hex head screw.
Assuming you have a hose with a diameter of 1/2 inch, according to the hose clamp specification range, an SAE No. 6 hose clamp should be used. For a hose diameter of 3/4 inch, consider using a No. 12 hose clamp. If the hose diameter is 1 inch, choose a No. 16 hose clamp. For a hose with a diameter of 2 inches, there will be more options available.
British Standard (BS) sizing specifications are similarly applied, as shown below:
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