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ENGINEERING DATA & SPECIFICATIONS

V-Band Clamp/Couping Load Formulas

V-Band Couplings must be engineered to provide an axial preload that exceeds the total in-service loads. These loads include: internal pressure; bending moments; and axial tension. For economy, the V-Band Coupling should be engineered based on the minimum strength required for the application loading. See the formulas below to determine your application loads or contact a Clampco sales engineer for assistance.

Symbols

Lp = Load Intensity due to Pressure, lbs./in. of circumference

Lb = Load Intensity due to Bending Moment, lbs./in. of circumference

La = Load Intensity due to Axial Tension, lbs./in. of circumference

L = Total Load Intensity, lbs. / in. of circumference

D = Flange O.D., in.

P = Internal Pressure, psi

M = Bending Moment, in.-lbs.

A = Axial Tension, lbs.


Step 1: Determine the Load Intensity due to Internal Pressure Lp.

Lp = (P x D) ÷ 4

Step 2: Determine the Load Intensity due to Bending Moment, Lb.

Lb = (4 x M) ÷ (π x D2)

Step 3: Determine the Load Intensity due to Axial Tension, La.

La = A ÷ (π x D)

Step 4: Determine the Total Load Intensity by adding the results of Steps 1, 2, and 3.

L = Lp + Lb + La

Example:

A V-Band Coupling meeting the following:

Flange O.D.

D = 5.00 in.

Internal Pressure

P = 200 psi

Bending Moment

M = 1000 in.-lbs.

Axial Tension Load

A = 1200 lbs.

Lp = (200 x 5.00) ÷ 4 = 250 lbs. / in.

Lb = (4 x 1000) ÷ (3.14 x 5.002) = 51 lbs. / in.

La = 1200 ÷ (3.14 x 5.00) = 76 lbs. / in.

L = 250 + 51 + 76 = 377 lbs. / in.

Step 5: Use the formula below to convert the total load intensity to an equivalent operating pressure

Formula: (4 x L) ÷ D = P

Example:

4 x 377 ÷ 5.00 = 302 psi*

*Please note: Equivalent operating pressure does not include a Factor of Safety.


MATERIALS & TEMPERATURES

For different materials and temperatures, the pressure chart data must be corrected using the following table:

Retainer Material 70°F/21°C 200°F/93°C 400°F/204°C 600°F/315°C 800°F/427°C
301/302/304 SS 1.00 0.88 0.75 0.68 0.60
Carbon Steel 0.5 0.46 0.43 0.37 --

BAND STRENGTH

Minimum Yield Strength for 300 Series Stainless Steel 1/2 Hard Temper in-lbs. [kilograms]

Band Width in Inches [Millimeters]
Material Thickness
in Inches [Millimeters]
500
[12.70]
.625
[15.88]
.750
[19.05]
.875
[22.22]
1.000
[25.40]
1.125
[28.57]
1.250
[31.75]
020 [.51] 1100 [499] 1375 [624] 1650 [748] 1925 [873] 2200 [998] 2475 [1123] 2750 [1247]
020 [.51] 1100 [499] 1375 [624] 1650 [748] 1925 [873] 2200 [998] 2475 [1123] 2750 [1247]
020 [.51] 1100 [499] 1375 [624] 1650 [748] 1925 [873] 2200 [998] 2475 [1123] 2750 [1247]
020 [.51] 1100 [499] 1375 [624] 1650 [748] 1925 [873] 2200 [998] 2475 [1123] 2750 [1247]
020 [.51] 1100 [499] 1375 [624] 1650 [748] 1925 [873] 2200 [998] 2475 [1123] 2750 [1247]
020 [.51] 1100 [499] 1375 [624] 1650 [748] 1925 [873] 2200 [998] 2475 [1123] 2750 [1247]

MATERIAL SPECIFICATIONS

Common materials used to manufacture Clampco clamps.

Corrosion Resistant Material Commercial Designation Procurement Specification
Steel Sheet & Strip Type 301 Annealed
Type 301 1/4 Hard
Type 301 1/2 Hard
AMS 5901
AMS 5517
AMS 5518
Steel Sheet & Strip Type 302 Annealed
Type 302 1/4 Hard
Type 302 1/2 Hard
AMS 5516
AMS 5903
AMS 5904
Steel Sheet & Strip Type 304L Annealed
Type 304 Annealed
Type 304 1/4 Hard
Type 304 1/2 Hard
AMS 5511
AMS 5513
AMS 5910
AMS 5911
Steel Sheet & Strip Type 316 Annealed
Type 316 1/4 Hard
Type 316I Annealed
Type 316 1/2 Hard
AMS 5524
AMS 5907
AMS 5507
ASTM-A-666
Steel Sheet & Strip Type 321 Annealed AMS 5510
Steel Bars & Forgings Type 410 AMS 5504
Steel Bars & Forgings Type 431 AMS 5628
Steel Bars & Forgings Type A286

AMS 5723
AMS 5735
AMS 5737

Steel Sheet & Strip Type A286 Annealed AMS 5525
Steel Sheet & Strip C276 Hastelloy ASTM-B-575
Steel Sheet & Strip 6061-T6 Aluminium AMS 4027
Steel Sheet & Strip Inconel 718 AMS 5596

Clampco Products Inc.

1743 Wall Road

Wadsworth, OH 44281

Established in 1971, Clampco Products is a family owned, USA manufacturer of high-quality stainless-steel clamps including V-Band, T-Bolt, Barrel Hardware, Worm Gear and Custom Clamps as well as Straps & Strap Assemblies.

AS9100

ISO 9001

ISO 14001

CERTIFICATIONS
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Use the Online Store to order small orders of standard stock items. For quantities of 25 or more, or for custom orders, please submit a RFQ.

www.trucknbusclamps.com

Questions? Call 330.336.8857.

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