Synthetic Webbing Sling ASME B30.9-2021

The ASME B30.9 standard, titled "Slings," provides guidelines and recommendations for the safe use, inspection, and maintenance of various types of slings, including synthetic webbing slings. Synthetic webbing slings are commonly used in lifting and rigging applications for their versatility, lightweight nature, and ease of use. Below, I'll provide an overview of synthetic webbing slings in accordance with ASME B30.9:

 Types of Synthetic Webbing Slings:
  • Synthetic webbing slings are typically made from high-strength synthetic materials such as nylon, polyester, or polypropylene.
  • They are available in various configurations, including flat web slings, round slings, and endless slings.
  • Different types of synthetic webbing slings have varying load capacities and characteristics suited for specific lifting applications.

Usage Guidelines:

  • ASME B30.9 provides guidelines for the proper selection of synthetic webbing slings based on factors like load weight, load center of gravity, sling type, and environmental conditions.
  • It specifies how slings should be used for various lifting configurations, including vertical, choker, and basket hitches.
  • The standard outlines the angles at which slings can be used safely and how to calculate the rated capacity based on these angles.

Inspection and Maintenance:

  • ASME B30.9 outlines procedures for the inspection of synthetic webbing slings before each use and periodically. It includes guidelines for identifying and assessing damage, wear, and other factors that could affect the sling's safety.
  • The standard provides recommendations for removing damaged or worn slings from service and replacing them as necessary.
  • It also offers guidance on proper storage and handling practices to extend the life of synthetic webbing slings.


ASME B30.9 recommends maintaining records of sling inspections, repairs, and retirements. Keeping these records can help ensure the safety and traceability of slings in use.

Training and Qualifications:

The standard emphasizes the importance of training and qualification of personnel involved in the selection, use, inspection, and maintenance of synthetic webbing slings.

It's important to note that while ASME B30.9 provides valuable guidance for the safe use of synthetic webbing slings, it is essential to adhere to manufacturer-specific recommendations and guidelines for each specific type and brand of sling. Additionally, compliance with relevant local regulations and standards is crucial for ensuring the safety of lifting operations involving synthetic webbing slings.

Webbing Sling with flat loop eye

webbing sling with tye iv eye
endless type webbing sling b30.9

webbing sling

webbing sling with triangle fittings

Synthetic Webbing Sling ASMT B30.9-2021