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ASME B30.9-2025

Slings
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ASME B30.9-2025

Slings

PUBLISH DATE 2025
PAGES 65
ASME B30.9-2025

Purpose of ASME B30.9-2021

The main purpose of B30.9 is to standardize the safe utilization of slings—the flexible connections between the load and the hoisting equipment (like a crane or hoist). Since slings are often the weakest link in a lifting system and are highly susceptible to damage, this standard aims to reduce risk by ensuring the equipment is correctly rated, maintained, and used.

The standard covers slings fabricated from six different materials:

  • Alloy Steel Chain
  • Wire Rope
  • Metal Mesh
  • Synthetic Fiber Rope
  • Synthetic Webbing
  • Polyester Fiber Yarn (Roundslings)

What is it Used For?

ASME B30.9-2021 is used by manufacturers, riggers, safety managers, and inspectors in every industry that performs lifting operations. Its application covers the entire lifecycle of the sling:

  • Manufacturing and Fabrication: It defines proof testing requirements for new slings (especially those incorporating welded fittings) and establishes the criteria for determining a sling's rated load based on its material, construction, and configuration (e.g., choker, basket, or vertical hitch).
  • Inspection and Removal: It specifies detailed criteria for frequent and periodic inspections, listing clear defects that necessitate immediately removing a sling from service (e.g., excessive wear, cracks, distortion, or heat damage).
  • Safe Operating Practices: It provides mandatory rules for sling protection, requiring that slings be shielded from contact with sharp edges, corners, or abrasive surfaces of the load to prevent cutting or damage. The 2021 edition added a nonmandatory appendix specifically dedicated to various types of sling protection.
  • Compliance: It is the primary reference used by safety professionals to meet legal compliance obligations (such as those incorporated by OSHA) related to the safe handling of loads.
SDO ASME: American Society of Mechanical Engineers
Document Number B30.9
Publication Date Jan. 1, 2025
Language en - English
Page Count 65
Revision Level
Supercedes
Committee
Publish Date Document Id Type View
Jan. 1, 2025 ASME B30.9-2025 Revision