"A worker was killed operating on a natural
gas pipeline. At a receiver station the man intended to pick up two so called
cleaning pigs, each weighing about 150 kg, diameter 0.5 m. For this purpose the
gas pressure in the pig trap was let off by a valve, manometer controlled.
According to an eyewitness's statement, the receiver pressure was equal to
outside air pressure before the accident. The victim stood right in front of
the flap of the receiver when he began to unfix the screws of the flap. Whilst
working, the flap snapped out driven by the two cleaning pigs. The man and the
devices were flung through a wire-netting fence and dropped down on a nearby
field at a distance of 27, 29 and 38 m, respectively, from the receiver. The
man died on the scene of the accident.
It was determined that the second pig had got stuck in the receiver and that gas pressure had built up behind the pigs due to a leaky valve. As a consequence the pigs were expelled at a velocity of approximately 220 km/h causing a pattern of injury comparable to that of a fall from a great height."
Courtesy:
Death by a cleaning pig--an unusual accident at work].
[Article in German]
Weber M1, Arnrich S, Wilk E, Lessig R.
Contribute to the surviving victims of Bhopal by buying my book "Practical Process Safety Management"
It was determined that the second pig had got stuck in the receiver and that gas pressure had built up behind the pigs due to a leaky valve. As a consequence the pigs were expelled at a velocity of approximately 220 km/h causing a pattern of injury comparable to that of a fall from a great height."
Courtesy:
Death by a cleaning pig--an unusual accident at work].
[Article in German]
Weber M1, Arnrich S, Wilk E, Lessig R.
Contribute to the surviving victims of Bhopal by buying my book "Practical Process Safety Management"
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