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CHAIN SLINGS (Part 1)

HSI Hanes Supply, Inc.

HSI Hanes Supply, Inc.'s Buffalo Sling has a long history of providing quality chain slings to industry. We use CM grade 80 Hercalloy 800 Chain and attachments along with CROSBY Fittings in the manufacture of our slings. In addition to the products you see here, we manufacture custom chain assemblies to your specifications.

Please feel free to call 1-888-426-3755 or contact us via e-mail so our expert staff can help you obtain the correct equipment for your applications.


CM grade 80 Herc-Alloy 800 chain and attachments are manufactured from special analysis alloy steel, engineered for a superior combination of strength, lightness and durability.

All Herc-Alloy 800 chain and attachments are black finish and/or color coded orange for easy, permanent identification. The chain is embossed with the grade (HA-800).

A higher strength heat treated alloy steel chain, CM grade 80 Herc-Alloy 800 chain is primarily used as a sling component for overhead lifting, but can be used in rigging and tie down applications where a lighter weight high strength chain is desirable. Recommended for overhead lifting by NACM, ANSI & OSHA.

Crosby is considered the standard in the rigging industry. Crosby products are manufactured with the highest design factors in the industry. These products are better able to withstand abusive field conditions because of the improved impact and fatigue characteristics designed into each item.

Before shipment, all Buffalo Sling chain slings undergo a succession of demanding quality control checks. Every sling is proof tested, registered and guaranteed for one year to be free from defects in materials and workmanship. A durable metal tag attached to the sling permanently identifies the grade, type, working load limit (at a specific angle of lift) and registration number of the sling.

Chain slings are used primarily for overhead lifting and are generally used in conjunction with a crane or some type of lifting device. Standard sling configurations consist of chain branches, which are affixed on one end to a master link or ring, with some type of attachment, usually a hook, affixed to the opposite end.

TYPES OF CHAIN SLINGS
In describing the type, the following symbols should be used. If attachments are other than standard, give detailed specifications.

First Symbol (Basic Type):
S - Single chain sling.
C - Single choker chain sling with a standard end link on each end, no hooks.
D - Double branch chain sling.
T - Triple branch chain sling.
Q - Quadruple branch chain sling.

Second Symbol (Type of Master Link or End Link):
O - Oblong master link of standard dimensions.
P - Pear shaped master link (available on request, not a standard item).

Third Symbol (Type of Hook):
S - Sling hook.
G - Grab hook.
F - Foundry hook.
L - Latchlok.

Sling Tags are Coded with Numerals
1 through 4 to reflect number of branches in sling, additional coding is defined as follows:
AS - Adjustable single.
SB - Single basket.
ES - Endless single.
ED - Endless double.
SAL - Single adjustable.
DAL - Double adjustable loop.
AD - Adjustable double.
DB - Double basket.

HOW TO ORDER CHAIN SLINGS
1 - Determine the maximum load to be lifted by the chain sling you are ordering.
2 - Choose the proper type of chain sling (single, double, etc.) which the size, shape and weight of the load dictate.
3 - Estimate the approximate angle to the load in which the legs of the sling will be positioned for operation.
4 - Select the proper attachments for your sling.
5 - Determine the overall reach from bearing point on master link to bearing point on attachment.
6 - Refer to the Working Load Limit Chart and to your pre-determined angle of the type sling you have selected.
7 - Choose the chain size that meets your requirements.
8 - When entering your order be sure you give complete information as to the size, reach and attachments required.

Note: Angle to the load an multiple leg slings will be 60° or greater as long as the distance between lifting eyes of load is NOT greater than reach shown on identification tag.

CARE, USE AND INSPECTION
The life and strength of Buffalo Sling chain slings depend on proper inspection, maintenance and use.
For additional information, refer to ANSI B30.9 and OSHA 1910.184.

Care
Chain requires careful storage and regular maintenance;

  • Store chains on an A frame in a clean, dry place.
  • To avoid corrosion, oil chains before prolonged storage.
  • Do not heat CM Herc-Alloy 800 chain; this will alter its thermal treatment.
  • Do not plate or change surface finish of chain. Contact Buffalo Sling for special requirements.

    Use
    To protect both operators and materials, observe these precautions when using chain slings;

  • Before use, inspect chain and attachments following the instructions under "Inspection" below.
  • Do not exceed working load limit. Any of the factors listed here can reduce the load the chain will hold:
  • Acceleration in rate of load application can produce dangerous overloading.
  • Variation in the angle of the load to the sling - as the angle decreases, the working load of the sling will increase.
  • Twisting, knotting or kinking- subjects links to unusual loading, decreasing the working load of the sling.
  • Use for purposes other than those for which slings are intended can reduce the working load of the sling.
  • Free chain of all twists, knots and kinks.
  • Center load in hook(s); hook latches must not support load.
  • Avoid sudden jerks when lifting and lowering.
  • Balance all loads; avoid tipping of loads.
  • Use pads around sharp corners.
  • Do not drop load on chains.
  • Match the size and working load limit of attachments such as hooks or rings to the size and working load limit of the chain.
  • For overhead lifting, use only alloy chain and attachments (grade 80).

    Inspection
    It is important both to inspect chain slings regularly and to keep a record of all chain inspections. Follow this guide for such an inspection system;

  • Before inspecting, clean chains with a non-acid/noncaustic solvent so that marks, nicks, wear and other defects are visible.
  • Inspect each link for these conditions.
  • Twists or bends.
  • Nicks or gouges.
  • Excessive wear at bearing points.
  • Stretch.
  • Distorted or damaged master links, coupling links or attachments; especially those spread in throat opening of hooks.
  • Mark plainly with paint each link or attachment showing any of the conditions listed here to indicate rejection; remove from service until properly repaired.

    Wear Allowances of CM Herc-Alloy 800 Chains
    Measure cross section at link ends to determine wear. If chain is worn to less than the minimum allowable thickness, remove from service.

  • MM INCHES MAXIMUM
    ALLOWABLE WEAR
    MINIMUM THICKNESS
    ALLOWABLE AT LINK ENDS*
    5.5 7/32 - 11/64 (.171) inches
    7.0 9/32 3/64 (.046) inches 13/64 (.203) inches
    10.0 3/8 5/64 (.078) inches 18/64 (.281) inches
    13.0 1/2 7/64 (.109) inches 22/64 (.343) inches
    16.0 5/8 9/64 (.140) inches 27/64 (.421) inches
    20.0 9/64 10/64 (.156) inches 34/64 (.531) inches
    22.0 3/4 11/64 (.171) inches 40/64 (.625) inches
    26.0 7/8 12/64 (.187) inches 47/64 (.734) inches
    32.0 1 16/64 (.250) inches 58/64 (.906) inches

    *Applies to CM Herc-Alloy 800 chain only.


    Hanes Supply provides our customers in plant sling inspections, a wide range of informative materials and seminars designed to promote the safe and proper use of slings and rigging equipment. Contact us for a free rigging handbook or information regarding our seminars and inspection services.


    USE OF CHAIN UNDER HEAT CONDITIONS

    When the chain itself is heated to temperatures shown here, working load limits should be reduced as indicated.

    TEMPERATURE
    OF CHAIN
    REDUCTION IN WORKING
    LOAD LIMIT WHILE HEATED*
    PERMANENT REDUCTION IN
    WORKING LOAD LIMIT**
    500° f none none
    600° f 10% none
    700° f 50% none
    800° f 30% none
    900° f 40% 10%
    1000° f 50% 20%

    *While chain is at temperature shown in first column.
    **When chain is used at room temperature after having been heated to temperatures shown in first column.


    CERTIFICATE OF TEST AND IDENTIFICATION

    The identification tag found on the master coupling link of each chain sling contains this information.

  • Grade
  • Size
  • Reach
  • Type
  • Working load limit (at a specific angle of lift)
  • Serial number


    END OF CHAIN SLING PART 1
    CONTINUE TO CHAIN SLING PART 2

    BACK TO SLING INFORMATION




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