Failure Investigation

March 16, 2018

A Tragic Bollard Failure

A tragedy took place along a jetty as a fishing vessel was unloading its catch while a heavy ocean surge pulsed into St Helena Bay on […]
September 23, 2017

Inspection of the inside of the hull on a vessel

A prototype vessel (Figure 1) makes use of an internal ballast system whereby lead bars are placed in the hull, and a polyester resin is poured […]
September 22, 2017

Failure Investigation of a Fire Tube Boiler Introduction

A fire tube boiler, generating steam for a fruit processing plant, failed catastrophically. Figure 1 shows a typical fire tube boiler layout. Coal is conveyed and […]
September 22, 2017

Failure Investigation of an Aluminium Ladder on board a vessel

An aluminium ladder, used during salvage operations aboard a barge vessel, failed catastrophically. It consisted of two aluminium ladders fixed together with duct tape and polypropylene […]
September 22, 2017

Derrick Pole Failure

A derrick pole on board a boat hoists a lifeboat on and off the ship in open water. The vertical member allows for rotation of the […]
September 22, 2017

Failure Investigation of a Worn Fuel Cam

The fuel cam on an injector pump for a marine diesel engine failed after 1392 running hours. Failure occurred at the contact point between the roller […]
September 22, 2017

Failure Investigation of a gearbox coupling on a fishing vessel

A fishing vessel is powered with a 9 cylinder diesel engine. Power transfer from the engine to the gearbox is enabled through a flexible coupling arrangement. […]
September 22, 2017

Failure Investigation (Corrosion)

Stainless steel elbows undergo a pickling and passivating process. Some of these elbows exhibited white spots on the surface following this process. The elbows have already […]
September 22, 2017

Failure of Rubber Seals

It was suspected that a rubber seal failed due to contact with hydraulic oil that was contaminated with brake fluid.