ENGINEERING DATA & SPECIFICATIONS
V-Band Clamp/Coupling 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.\v(\<(u)[^>]*\>)@<=([^{}<>]+)(\<\/\2)@=
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] |
| .025 [.64] | 1375 [624] | 1719 [780] | 2063 [936] | 2406 [1091] | 2750 [1247] | 3094 [1403] | 3438 [1559] |
| .031 [.79] | 1705 [773] | 2131 [967] | 2558 [1160] | 2984 [1353] | 3410 [1547] | 3836 [1740] | 4263 [1934] |
| .040 [1.02] | 2200 [998] | 2750 [1247] | 3300 [1497] | 3850 [1746] | 4400 [1996] | 4950 [2245] | 5500 [2495] |
| .050 [1.27] | 2750 [1247] | 3438 [1559] | 4125 [1871] | 4813 [2183] | 5500 [2495] | 6188 [2807] | 6875 [3118] |
| .062 [1.57] | 3410 [1546] | 4263 [1934] | 5115 [2320] | 5968 [2707] | 6820 [3094] | 7673 [3480] | 8525 [3867] |
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 |
| 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
330.336.8857
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.
CERTIFICATIONS
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.