ASME B30.20 : 2025

Volume B30.20 includes provisions that apply to the marking, construction, installation, inspection, testing, maintenance, and operation of below-the-hook lifting devices, other than components addressed by other ASME B30 volumes or other standards, used for attaching loads to a hoist. The requirements in this Volume also apply to clamps used for positioning and anchoring.

What ASME B30.20 means for rigging and material handling

ASME B30.20 is a critical safety standard that provides provisions for the marking, construction, installation, inspection, testing, maintenance, and operation of "lifters"—devices used for attaching a load to a hoist. Unlike general rigging hardware like slings or shackles, BTH devices are often engineered for specific shapes and handling requirements.

1. It establishes mandatory safety requirements to protect personnel and property during lifting operations.
2. It categorizes lifting devices into distinct chapters based on their mechanism (Mechanical, Vacuum, Magnetic, etc.).
3. It works in tandem with ASME BTH-1, which governs the structural and mechanical design criteria of the device.

Video credit: Mazzella Companies (Detailed walkthrough of a lifting clamp inspection per ASME B30.20).

How ASME B30.20 fits into the equipment lifecycle

The standard ensures that safety is managed from the moment a custom lifter is conceived through its daily use and eventual retirement from service.

1. Design & Construction: Ensuring the device meets Design Categories (A or B) and Service Classes (0-4) defined by BTH-1.
2. Initial Inspection: Mandatory verification of load ratings and markings before the device's first lift.
3. Frequent Inspection: Visual checks performed at intervals based on the severity of service (Normal, Heavy, or Severe).
4. Periodic Inspection: A documented, comprehensive annual review of structural integrity and wear components.

Core building blocks of ASME B30.20

1. Structural and Mechanical Lifters: Includes spreader beams, pallet lifters, and C-hooks.
2. Vacuum Lifting Devices: Covers the use of vacuum pads and pumps to secure non-porous loads.
3. Lifting Magnets: Addresses both close-proximity and remotely operated magnetic lifting systems.
4. Grapples: Specific requirements for scrap and material-handling grapples used in recycling and bulk handling.
5. Clamps: Requirements for indentation-type, friction-type, and anchoring clamps.

Video credit: The Lifting & Rigging Channel (Summary of the latest updates and revisions to the B30.20 standard).

Service Classifications and Inspection Intervals

The frequency of documented periodic inspections is determined by how often the device is cycled and the environment it operates in.

Marking and Identification Requirements

According to ASME B30.20, every lifter must be permanently marked with specific data to be considered compliant.

• Manufacturer's name and address.
• Unique serial number for traceability.
• Weight of the device (if it exceeds 100 lbs / 45 kg).
• Rated load capacity clearly visible on the main structure.
• ASME BTH-1 Design Category and Service Class.

Video credit: Mazzella Companies (Explaining marking compliance for new and older BTH devices).

Common pitfalls and how to avoid them

1. Missing Nameplates: If a load rating tag is missing or illegible, the device must be removed from service immediately.
2. Homemade Devices: Fabricating "shop-built" lifters without a Qualified Person's design approval and proper load testing is an OSHA violation.
3. Ignoring Wear Criteria: Failure to measure "throat opening" or "thickness" wear on hooks and jaws often leads to catastrophic failure.
4. Unauthorized Repairs: Welding on a lifter without a certified procedure or manufacturer's approval can compromise the heat-treatment of the steel.

Frequently Asked Questions

1. What is the difference between ASME B30.20 and ASME BTH-1?
B30.20 is the safety standard (inspection, use, maintenance), while BTH-1 is the design standard (engineering math, stress limits, factors of safety).

2. How often do I need to load test a B30.20 device?
New lifters should be load tested at 125% of rated capacity. Subsequent load tests are generally only required after a structural repair or modification.

3. Who is authorized to perform B30.20 inspections?
Frequent inspections can be done by a Designated Person (operator), but Periodic inspections must be performed by a Qualified Person with specific rigging expertise.

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