A guide to hose clamps

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What are hose clamps used for?

Hose clamps are designed to secure a hose over a fitting, such as a spigot or barb, acting as a seal to prevent fluid from leaking at the connection. They also stabilize the hose connection. They&#;re predominantly used in the plumbing and automotive industries but are also used in other industrial applications and to prevent leaks during the transport of liquids, chemicals and gases.

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What are the different types of hose clamps?

There are three main hose-clamp types:

Plastic hose clamps

The ratcheting teeth interlock to provide a strong, secure. These can be installed quickly by hand and squeezed with pliers to tighten the grip. Sometimes referred to as a snap grip, snapper or herbie grip, these hose clamps are made of plastics. Nylon is an excellent choice, as it&#;s strong while providing flex for easier closure. Economical, lightweight and reusable.

Applications and industries:

• Specialty vehicle and automotive fuel lines, airlines, drain lines
• Pumps and hydraulic systems in medical equipment (should NOT be used in other hydraulic-pressure applications)
• White goods, venting systems and outdoor hoses

Worm-drive hose clamps

These hi-torque worm clamps are the style meant when referring to jubilee clips. They feature a helical-threaded screw, or worm gear, which is housed in the clamp. When the screw is turned, it acts like a worm drive pulling the threads of the band. The band then tightens around the hose or tube.

The high clamping force makes this a heavy-duty jubilee clip. Available as stainless-steel or steel hose clamps, these are ideal when space is restricted or hard to reach. NOT recommended for soft or silicone hose. For small hose assemblies, consider mini worm-drive hose clamps.

Applications and industries:

• Wire-reinforced hoses
• Automotive fuel lines and exhaust hoses
• Plumbing &#; seal hoses, water pipes and marine sink outlets
• Signage, temporary repairs, sealing large containers

T-bolt hose clamps

Designed to provide a secure, air-tight seal on applications with larger diameters, where high vibration occurs. The clamp&#;s bolt is inserted through the hole in the hose clamp body. The nut is then tightened from underneath with a wrench or pliers. As stainless-steel hose clamps, T-bolts are ideal as clamps for high-pressure hose and for use with silicone hoses.

Applications and industries:

Specialty vehicles and automotive

• Maintain pressure on gas lines when engine is off
• Gas lines cut too short or needs a fitting added
• Secure a bleeder valve or safety valve in the gas line for putting gas tank at a specific pressure

Sealing off water lines when hoses and tubing are used. Examples:

• Swimming pool plumbing
• Aquaponics systems
• Hydroponics systems
• Drip irrigation

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How to install a hose clamp

A torque wrench is the best tool for installing a hose clamp, though a screwdriver will work too. We&#;ll use the popular worm-drive hose clamp for our example below. Follow these steps for how to tighten a hose clamp too:

1. Loosen the hose clamp by turning the clamp&#;s screw counterclockwise.
2. Attach it to the edge of the hose with the screw head in the direction needed to make contact with the tool you&#;re using.
3. Place the edge of the hose around the fitting.
4. Turn the screwdriver or torque wrench concentrically to tighten the clamp to secure the hose in place.

Adhere to the clamp&#;s torque specification, which is given in inches by the clamp manufacturer. Be careful not to overtighten, which will only damage the threaded part of the clamp and lead to the clamp failing.

A t-bolt hose clamp is similarly installed:

1. Insert the bolt through the clamp&#;s body.
2. Tighten the nut from underneath using a wrench or pliers.

The two halves of the clamp are then tightened against each other, and just like that, you&#;re done.

How to remove hose clamps

Specifically, let&#;s look at how to remove spring hose clamps, which is another name for t-bolts, which have both a drive and a bolt head.

1. Loosen the bolt with a flat-head screwdriver or a socket wrench.
2. Turn the bolt counterclockwise until it&#;s loose, then pull it off the hose.

How to measure hose clamp size

When we say &#;hose-clamp size,&#; we&#;re referring to the clamping diameter range. This range means the minimum and maximum usable diameter.

1. You&#;ll first need to know the outside diameter (O.D.) of your hose. For an accurate measurement, assemble the hose on the fitting you&#;ll be using.
2. Measure the O.D. of the hose and fitting with a caliper. If you don&#;t have a caliper, then use this formula:

Outside Diameter (O.D.) = Circumference (C) ÷ 3. (Pi)

Choose a clamp that sits in the middle of the clamp&#;s adjustment range. Below is a portion of the SAE standard for Type F worm-drive hose clamps. Type F typically has a 1/2" wide band and a 5/16" slotted hex head screw.

Worm-drive hose clamp size chart, Type F

SAE size

Clamp range (inches)

Clamp range (millimeters)

6

3/8 &#; 7/8

10 &#; 22

8

7/16 &#; 1

11 &#; 25

10

½ &#; 1 1/16

13 &#; 27

12

½ &#; 1 1/4

13 &#; 32

16

13/16 &#; 1 ½

21 &#; 38

20

13/16 &#; 1 3/4

21 &#; 44

24

1 &#; 2

25 &#; 51

28

1 5/16 &#; 2 ¼

35 &#; 57

32

1 9/16 &#; 2 1/2

40 &#; 63

36

1 13/16 &#; 2 3/4

46 &#; 70

40

2 &#; 3

51 &#; 76

44

2 15/16 &#; 3 ¼

59 &#; 82

48

2 9/16 &#; 3 ½

65 &#; 89

 

Let&#;s say you have a 1/2" hose. Note the clamp ranges. You can use an SAE size 6 hose clamp. Now let&#;s say your hose is 3/4". Consider using a 12 hose-clamp size. If your hose is 1", a size 16 hose clamp would do. If we&#;re talking about a 2" hose, then you have more choices, as you can see.

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The British standard works in a similar way, as this example shows:

British standard for worm-drive hose clips

Size

Adjustment range (millimeters)

Adjustment range (inches)

12

9.5 &#; 12

3/8 &#; ½

16

11 &#; 16

½ &#; 5/8

20

13 &#;20

½ &#; ¾

22

16 &#; 22

5/8 &#; 7/8

25

18 &#; 25

¾ &#; 1

30

22 &#; 30

7/8 &#; 1 1/8

35

25 &#; 35

1 &#; 1 3/8

40

30 &#; 40

1 2/8 &#; 1 5/8

45

32 &#; 45

1 ¼ &#; 1 3/4

50

35 &#; 50

1 3/8 &#; 2

55

40 &#; 55

1 5/8 &#; 2 1/8

60

45 &#; 60

1 ¾ &#; 2 3/8

70

55 &#;70

2 1/8 &#; 2 3/4

The following are frequently asked questions and operational tips to help you on your next job.

Securing the tong:

The tong should be secured for both make-up or break-out operation, by utilizing the snub line. If this is not done, the tong may be thrown against operator causing physical harm.

Be sure hydraulic connections are tight:

To be sure connectors are completely tight, first tighten them until trave lis restricted and the end of the thread travel appears to be reached. Then try to tighten the connector further to be sure first restriction was not a false tightness. Then continue to tighten the fitting until connection is tight.

Keep tong throat area clean:

Be sure no part of the body or clothing is in tong head area and be sure no cables or equipment other than tubing are enclosed in the throat.

Mechanical shifting versus hydraulic shifting:

When using the mechanical shift lever to change speeds, the power tong must first come to a complete stop before shifting. When using tongs hydraulic shift two-speed motor to change speeds, the tong may be shifted "On the Run."

Why are Eckel tongs the best tong on the market?

Eckel tongs have proven to basically to last forever with minimal maintenance as all they are manufactured with the highest quality of steel. Using Eckel equipment tells your customer that you have the highest quality equipment on the market.

What size of tong do I need?

Tong size is determined by range of tubulars you will run. For example a 5-1/2 Hydra-Shift® is capable of running tubulars 5-1/2-inches and smaller while the 14 UHT is capable of running tubulars 14-inches and smaller. It is important not to use a large range of sizes with just one tong. If you have a 10-3/4 Standard and you regularly run 4-1/2-inch tubing with this tong, you might consider using a smaller tong.

What torque range tong do I need?

Determine the maximum torque that will be required to break-out the tubular you are running. There are many influences that figure in to break out torque. In some instances it requires up to 2-1/2 times the makeup torque to break out a connection.

What is the advantage of wrap-around dies verses rig or contour dies?

Wrap-Around dies offer a much larger surface contact on the tubular. This distributes the force uniformly around the tubular reducing needless pipe damage due to point loading.

What are the effects of PSI pressure?

PSI pressure determines the maximum torque the tong will safely be able to reach. Eckel rates all their tongs at the industry standard PSI. A competitor with a similar size tong may show more or the same torque as an Eckel tong due to a higher PSI from the power unit (which is in fine print) in an effort to fool you, thinking there tong is equal to the industry standard (Eckel tong.)

What are the effects of Gallons Per Minute (GPM) ?

Gallons Per Minute determines the rotational speed of the tong. A low GPM will cause the tong to operate at a lower speed while a high GPM will result in the tong to rotate at a higher speed. Eckel offers an RPM (Revolutions per minute) Control which is a flow divider to decrease the amount of hydraulic fluid that reaches the tong if needed, the remaining fluid is returned to the power unit reservoir. By decreasing the amount of fluid reaching the tong the operator is able to control the maximum RPM of the tong.

We have never used hydraulic oil coolers why should I purchase a power unit with a hydraulic oil cooler?

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• Industry Experts indicate hydraulic oil performs best between 130 and 150 degrees.
• Field tests have shown depending on several factors most power units used in above 32 degrees Fahrenheit conditions no matter if your hydraulic oil tank holds 200 gallons of oil, will exceed 150 degrees during a short 8 hour job. Most power units without hydraulic oil coolers exceed 170 degrees which is way past the recommended guide lines.
• Hydraulic oil will last longer and perform better.
• Cost savings in not replacing hydraulic hoses as often.
• Seals in the tong control valves will last many times longer.
• Tong motor seals will last much longer.
• Tong operators will notice the improved tong performance & a quicker trip times.
• Personnel safety will improve greatly.