Proof test for slings
For companies that utilize overhead cranes and slings in their daily operations, it is essential that the slings stay in good working order. To increase the safety and productivity of this equipment, OSHA requires that all employers proof test different types of slings and its components when new and/or repaired.
The following excerpt is taken directly from OSHA 1910.184 Slings.*
Definition
Proof test is a nondestructive tension test performed by the sling manufacturer or an equivalent entity to verify construction and workmanship of a sling.
Alloy steel chain slings proof testing
1910.184(e)(4)
The employer shall ensure that before use, each new, repaired, or reconditioned alloy steel chain sling, including all welded components in the sling assembly, shall be proof tested by the sling manufacturer or equivalent entity, in accordance with paragraph 5.2 of the American Society of Testing and Materials Specification A391-65, which is incorporated by reference as specified in §1910.6 (ANSI G61.1-1968). The employer shall retain a certificate of the proof test and shall make it available for examination.
Repairing and reconditioning alloy steel chain slings
1910.184(e)(7)
(i) Worn or damaged alloy steel chain slings or attachments shall not be used until repaired. When welding or heat testing is performed, slings shall not be used unless repaired, reconditioned and proof tested by the sling manufacturer or an equivalent entity.
Wire rope slings end attachments
1910.184(f)(4)
(ii) All welded end attachments shall not be used unless proof tested by the manufacturer or equivalent entity at twice their rated capacity prior to initial use. The employer shall retain a certificate of the proof test, and make it available for examination.
Metal mesh sling handles
1910.184(g)(2)
Handles shall have a rated capacity at least equal to the metal fabric and exhibit no deformation after proof testing.
Metal mesh sling testing
1910.184(g)(5)
All new and repaired metal mesh slings, including handles, shall not be used unless proof tested by the manufacturer or equivalent entity at a minimum of 1/⁄2 times their rated capacity. Elastomer impregnated slings shall be proof tested before coating.
Synthetic web sling repairs
1910.184(i)(8)
(ii) Each repaired sling shall be proof tested by the manufacturer or equivalent entity to twice the rated capacity prior to its return to service. The employer shall retain a certificate of the proof test and make it available for examination.
It's important that slings are properly tested, inspected and maintained by a reputable service provider. Konecranes inspectors and technicians can inspect the slings and other rigging equipment in your facility to determine if it meets OSHA standards. Contact us to set up sling inspections.
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*The foregoing OSHA regulations are not intended to be a comprehensive overview of all applicable regulations pertaining to the designated topic. State laws may mandate different safety and maintenance standards. Accordingly, please consult applicable state laws as well as original equipment manufacturer specifications for further guidance. The statements and descriptions contained herein constitute the opinion/recommendation of the seller and are not intended to create any express warranties.
