Case Studies-
Construction QA/QC

Locating the Position of Manhole Pipeline, Fire Hydrant Pipeline and Electrical Conduits at the Oakwood Beach WWTP West and South Roadway
2019 to 2020

Locating the Position of Manhole Pipeline, Fire Hydrant Pipeline and Electrical Conduits at the Oakwood Beach WWTP West and South Roadway

The UtilityScan provides a rich feature set that redefines the level of performance available in a low cost utility locating system. Its compact size makes it extremely portable and easy to maneuver in tight survey areas. The simple operation is ideally...

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Locating the Position of Manhole Pipeline, Fire Hydrant Pipeline and Electrical Conduits at the Newton Creek WRRK
2019 to 2020

Locating the Position of Manhole Pipeline, Fire Hydrant Pipeline and Electrical Conduits at the Newton Creek WRRK

The UtilityScan provides a rich feature set that redefines the level of performance available in a low cost utility locating system. Its compact size makes it extremely portable and easy to maneuver in tight survey areas. The simple operation is ideally...

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Locating the Position of Manhole Pipeline, Fire Hydrant Pipeline and Electrical Conduits at the Long Island-NY
2019 to 2020

Locating the Position of Manhole Pipeline, Fire Hydrant Pipeline and Electrical Conduits at the Long Island-NY

The UtilityScan provides a rich feature set that redefines the level of performance available in a low cost utility locating system. Its compact size makes it extremely portable and easy to maneuver in tight survey areas. The simple operation is ideally...

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Failure Analysis of a Pipe Cap and Header Due to Abnormal Turbulence Caused by Internal Geometry
2019 to 2020

Failure Analysis of a Pipe Cap and Header Due to Abnormal Turbulence Caused by Internal Geometry

Two segments of a pipe and header cap welded assembly were submitted for a failure analysis. It was reported that these two segments were from a pipe and a cap of a 24 inch Hot Reheat Header from a Heat Recovery Steam Generator (HRSG). Visual examination,...

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Failure Analysis of a Screw due to Fatigue
2019 to 2020

Failure Analysis of a Screw due to Fatigue

A 5/8—11 by 1—1/2 inch Grade 8 hex head steel cap screw used on a pump assembly had fractured during disassembly of the pump. Visual examination and metallographic analyses was performed on the submitted sections to look for root cause of the failure....

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Failure Analysis of a Truck Leaf Spring due to Fatigue
2019 to 2020

Failure Analysis of a Truck Leaf Spring due to Fatigue

It was reported that the operator of a truck was driving when the rear wheels locked, causing the vehicle to slide sideways and overturn. The rear wheels locked and separated from the vehicle when the rear spring assembly failed. It was also reported...

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Failure Analysis of a Compressor Valve Disk due to Fatigue
2019 to 2020

Failure Analysis of a Compressor Valve Disk due to Fatigue

Two pairs of valve discs that failed, after an unknown period of service in an ammonia refrigeration compressor, were submitted for of failure analysis. The discs measured 5-11/16 inch outside diameter by 0.56 wide by 0.058 inch thick and were hardened...

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Failure Analysis of a Tie Rod due to Impact
2019 to 2020

Failure Analysis of a Tie Rod due to Impact

A fractured tie rod, the subject of the above referenced caption, was submitted for failure analysis to determine the cause of fracture. It was reported that ‘The assured, while driving in New York, suddenly heard a “pop”, and lost control of the...

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Failure Analysis of a Hot Water Heating System Pipe due to Pitting
2019 to 2020

Failure Analysis of a Hot Water Heating System Pipe due to Pitting

A thirty—four inch length of one inch NPS pipe with a pinhole near one end was submitted for analysis to determine the cause of the pinhole. The pipe was removed from the wall of a high rise building that was built fifteen years ago but only occupied...

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Failure Analysis of a Fuel Cell Terminal Lug due to Hard Coating
2019 to 2020

Failure Analysis of a Fuel Cell Terminal Lug due to Hard Coating

Two crimping dies (T & B Nos. 45 and 42), were reported to be used sequentially to secure an electrical cable to the lug. Visual examination, chemical, mechanical and metallographic analyses was performed on the submitted strap sections to look for...

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Failure Analysis of a Cable Support Strap due to Stress Corrosion Cracking
2019 to 2020

Failure Analysis of a Cable Support Strap due to Stress Corrosion Cracking

10 straps were submitted to the laboratory for failure analysis. These Zinc aerial cable support straps were placed on utility poles in a rural Ohio location. With no reported industrial sites for miles, these straps were found to be cracking within four...

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Failure Analysis of a Pipe due to Internal Pressure
2019 to 2020

Failure Analysis of a Pipe due to Internal Pressure

A three inch, Schedu1e 40 by 33 inches long, fresh water galvanized steel pipe, from the Astoria fuel depot, was submitted for a cause of failure analysis. The pipe was reported to have been in service for up to sixty years but a heat trace on the pipe...

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Failure Analysis of a Cable Puller due to torsional overload
2019 to 2020

Failure Analysis of a Cable Puller due to torsional overload

A Powercat Senior Mode Portable Cable Puller was submitted to the laboratory for the purpose of failure analysis. The cable puller was taken from operation in an electrical closet just off of an elevator reception area. The unit was installed for the...

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Failure Analysis of a Brass Pipes due to Stress Corrosion
2019 to 2020

Failure Analysis of a Brass Pipes due to Stress Corrosion

Five lengths of brass pipe were submitted for testing and analyses. A cause of failure analysis was conducted on one of the lengths, “NYCHA No. 1”, which had a longitudinal crack. It was reported that “NYCHA No. 1” had leaked after only a few...

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Failure Analysis of a Truck Axle due to Fatigue
2019 to 2020

Failure Analysis of a Truck Axle due to Fatigue

A broken truck axle was submitted for failure analysis. The axle had broken at two locations resulting in three parts. The broken axle is one of the several similar axles that have broken in the recent batches. Two intact axles, one used and one unused,...

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Failure Analysis of Plastic (vinyl) Covered Wire Rope Cable due to overload
2019 to 2020

Failure Analysis of Plastic (vinyl) Covered Wire Rope Cable due to overload

A section of a fractured plastic (vinyl) covered wire rope cable was submitted for failure analysis. Two new rope is also sent for comparison. The cable in question appears to have been purchased and installed on August 20, 1999. The owner of the Gymnasium...

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Failure Analysis of Natural Gas Service Compression Fitting due to Sideway Overload
2019 to 2020

Failure Analysis of Natural Gas Service Compression Fitting due to Sideway Overload

Two gas “Factory Assembled Transition Fittings” were submitted for determining the cause of failure. The pipe ends were found to be fractured, approximately one week after installation, during final hook up process. Visual examination, mechanical...

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Failure Analysis of forty-eight Inch Cast Iron Water Main Pipe due to Overload
2019 to 2020

Failure Analysis of forty-eight Inch Cast Iron Water Main Pipe due to Overload

Two sections of failed 48 inch underground water main were submitted for failure analysis. The two pieces appeared to be the parent pipe piece. The main break had occurred on April 19, 2005 adjacent to the Street Bridge over a River in New Jersey. The...

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Failure Analysis of a Excavator Heel due to Fatigue and HAZ
2019 to 2020

Failure Analysis of a Excavator Heel due to Fatigue and HAZ

One broken boom heel of a Liebherr excavator 995 was submitted for failure analysis. The excavator was used on a marine boat. The heel had cracked above the weld to the deck mounting. Visual examination, chemical, mechanical and metallographic analyses...

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Failure Analysis of Diesel Engine Cylinder Liners due to Cavitation Damage
2019 to 2020

Failure Analysis of Diesel Engine Cylinder Liners due to Cavitation Damage

Three used cylinder liners--identified by numbers 277, 1016 and 1076--and an unused liner were submitted to the laboratory for failure analysis. The three liners were found pitted on the exterior after services of 156,829/23,273/189,000 mileages by the...

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Failure Analysis of Diesel Engine Crankshaft due to Overload and Welding
2019 to 2020

Failure Analysis of Diesel Engine Crankshaft due to Overload and Welding

Three pieces of a broken crank shaft of a 1300 HP V-12 twin-turbo charged, inter-cooled Man Diesel Engine from a 61 Ft Yacht were submitted to laboratory for failure analysis. Two main bearings and two rod bearing halves were also submitted. Visual examination,...

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Failure Analysis of A Bus Radiator Core due to Deficient Soldering and Fatigue
2019 to 2020

Failure Analysis of A Bus Radiator Core due to Deficient Soldering and Fatigue

Two radiator cores were submitted for failure analysis. The cores had been taken out from diesel engines which reported a leakage at the radiator head gasket and leaking again 6 to 8 months after replacement of an updated gasket by manufacturer. The manufacturer...

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Failure Analysis of a Boiler due to Thermal Stresses
2019 to 2020

Failure Analysis of a Boiler due to Thermal Stresses

An eleven section Boiler was found to be leaking after two years of service. Two out of 11 sections from the failed boiler were submitted for determining the cause of failure. The sections were delivered in pieces to the laboratory for failure analysis....

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