Proof Test Services available at all BLP branches

At Bishop Lifting Products, slings, wire rope, rigging hardware, mooring lines, oilfield equipment, and structural components are all proof tested or load tested to validate the overall integrity of the item.  This integrity is based on the material of the item, as well as the splices, welds, epoxy, stitching, or swaging used for terminations.  These items are load tested to a predetermined percentage above the rated capacity recommended by the manufacturer, ASME B30.9 Slings standard, API standards, or customer specific policies.  The proof test serves as a pass or fail certificate at the time of test.

Proof Test Services available at all BLP branches
hoist testing

More and more customers are now requiring proof testing on all slings.  Proof Testing was driven by the offshore drilling industry and is mandated in the ASME B30.0 “Slings” standard on alloy chain slings, metal mesh slings, and any sling that has been modified or repaired. Our largest proof test bed can test up to 3.3 million pounds  (1500 metric tons). With an overall length of 323 feet, and inside pulling length of around 275 feet located in Houston, TX.

Third Party witness testing is available if necessary.

Common Items Tested:  
-Alloy Chain Slings
-Metal Mesh Slings
-Lifting Devices – Spreader Bars, Lifting Beams
-Socket Lines – Raising Lines, Pendant Lines
-Twin-Path® Extra Covermax Slings
-Any sling that has been repaired or modified
-Wire Rope Slings
-Synthetic Web Slings
-Rigging Hardware

Pad Eye Testing

• Hydraulic Pad Eye Testing
• Lifting Lugs
• Hydraulic Trunnion Testing
• Welded in Fixtures

Non-Destructive (NDT) Testing

• Magnetic Particle Inspection
• Liquid Dye Penetrant
• Ultra Sound
• On-site Services Available

DNV Testing

• Witnessed by 3rd party DNV-GL auditor

Vertical Testing

• Vertical testing capacity up to 100K lbs.
• used for testing chain hoists


Types of Testing Provided:

• Proof Load
• Cycle Testing
• Yield Testing
• Break Testing
• Extended Hold Testing
• Strain Gauge Testing

Access our online database of test certificates at: