Silverback Slings | Holloway Houston, Inc.

HHIPerLift Spectra Slings

One of the most successful and popular offerings by Holloway Houston, HHIPerLift Spectra Slings are lightweight synthetic slings made to withstand large loads. Designed to offer exceptional performance under grueling conditions, they are capable of lifting loads anywhere from 8 tons to 600 tons at 5:1 ratio.

From hard items to fragile ones, you can use HHIPerLift Spectra Slings to lift any load. Resistant to physical and chemical abrasions, and exhaustion, these slings have become an industry standard. However, keeping with its tradition to provide the users with products made using the latest technology and performance specifications, Holloway Houston has relaunched HHIPerLift Spectra Slings as Silverback Slings.

Silverback Slings

Made with Honeywell Spectra® fibers, Silverback Slings are better and enhanced series of new-generation lifting slings made from space-age materials and high-tech design processes.

  • High Specific Modulus – Excellent for lifting and mooring in ultra-deep water, highly cut-resistant
  • Saltwater Resistance – 100% proof-tested for resistance to prolonged saltwater immersion at ultra-deep levels

General and Technical Data

High-Contact Rigging Efficiency (HCRE)

Most conventional roundslings, wire ropes, and braided ropes generally require reasonably large and fixed diameters in relation to the lifting potential. However, Silverback Slings offer superior rigging efficiency compared to their traditional counterparts.

Unlike braided ropes or helically-laid stranded yarns, Silverback Slings use a unique oversized triple cover with a parallel laid yarn inside. It allows you to reshape the slings, making them fit perfectly on the load-bearing surfaces.

You can use a smaller shackle as Silverback Slings increase the contact of lifting fibers with the pin. The reduced thickness of the fiber bundle in touch with the lifting area helps maintain the required 3:1 D/d ratio.

Silverback Slings have a design factor of 5:1 (ultimate = 5 times rated load). These slings are rated in tons. Users are advised to not exceed the rated capacity to avoid potential accidents.

Cross-Sectional Area

Measured in square inches, the cross-sectional area is the space occupied by the Silverback load-bearing wraps at rated capacity when pulled around a pin. Using the HH-75T-SP 75-ton as an example, the cross-sectional area is an exceptional 4.40 inches compared to other sling materials having a fixed cross-sectional area.

D/d Ratios

To achieve the loads it was designed for, the Silverback Sling System needs to have a minimum of a 3:1 D/d ratio. In other words, the size of the pin around which the slings goes must have at least three times the diameter of the sling at the bearing point.

Ratings & Design Factors

Sling ratings are based on a standard wide-body shackle (or equivalent bearing surface) of equal or greater capacity.

Ratings & Design Factors

  • Stronger: Silverback Slings have up to 40% higher specific strength compared to aramid fibers (Technora, Kevlar), along with excellent toughness and durability.
  • Lightweight: Silverback Slings are remarkably light; a vertical 15′ 75-ton sling weighs less than 75 pounds. As a result, you can manipulate them without the use of special equipment or work-rated ROVs.
  • Reduced Elongation: They have a maximum of 3.8% at breaking load.
  • Floatation Properties: They are lightweight with 0.97-g/cc density. So, they tend to remain relatively stable in the deep water.
  • Prolonged Saltwater Immersion Tolerance: The Honeywell Spectra® testing showed no reduction in lifting capacity after six months of saltwater immersion. It showed only 1% to 2% loss after 12 months of immersion.
  • They have excellent fatigue resistance.
  • Superior damping characteristics (vibration, shock, and impact): Silverback Slings can withstand high-load strain rate velocities.
  • High Specific Modulus: Excellent for lifting and mooring in ultra-deep water.
  • Exceptional high-pressure resistance.
  • High chemical resistance.
  • Good UV resistance.
  • Highly cut-resistant.
  • Made in America: All Honeywell Spectra® fibers and cover materials are manufactured in the U.S. Sling fabrication and load testing are performed at HHI’s Houston facility.
  • API-Q1 standards of design, calculation, and large sample testing, as well as other proven methods are used in the development of Silverback Roundslings.

HHIperlift High Performance Roundslings (HH-SP & HH-SPE)

HHI Part Number
Endless Roundslings
HHI Part Number
Eye and Eye Roundslings
Vertical WLL
in M Ton
Choker Hitch
WLL in M Ton
Vertical Basket
WLL in M Ton
Rope Dia.
Approx. Wgt/Ft
Length (lbs).
Body
Dia
HH-18T-SP
HH-18T-SPE
18t
14.4t
36t
.81
18t
1.43
HH-25T-SP
HH-25T-SPE
25t
20t
50t
1.13
30t
1.75
HH-50T-SP
HH-50T-SPE
50t
40t
100t
2.26
55t
2.38
HH-75T-SP
HH-75T-SPE
75t
60t
150t
3.39
75t
2.86
HH-100T-SP
HH-100T-SPE
100t
80t
200t
4.52
125t
3.5
HH-125T-SP
HH-125T-SPE
125t
100t
250t
5.65
125t
3.89
HH-150T-SP
HH-150T-SPE
150t
120t
300t
6.78
150t
4.29
HH-175T-SP
HH-175T-SPE
175t
140t
350t
7.91
200t
4.77
HH-200T-SP
HH-200T-SPE
200t
160t
400t
9.04
200t
4.93
HH-225T-SP
HH-225T-SPE
225t
180t
450t
10.17
250t
5.57
HH-250T-SP
HH-250T-SPE
250t
200t
500t
11.30
250t
5.89
HH-275T-SP
HH-275T-SPE
275t
220t
550t
12.43
300t
6.21
HH-300T-SP
HH-300T-SPE
300t
240t
600t
13.56
300t
6.52
HH-350T-SP
HH-350T-SPE
350t
280t
700t
15.83
400t
7.16
HH-400T-SP
HH-400T-SPE
400t
320t
800t
18.09
400t
7.48
HH-450T-SP
HH-450T-SPE
450t
360t
900t
20.35
500t
8.43
HH-500T-SP
HH-500T-SPE
500t
400t
1,000t
22.61
500t
8.91

*Larger Capacities Available upon Request.