Date | December 29, 1910 |
---|---|
Time | 9:30 am |
Location | Morewood Lake Pittsfield, Massachusetts |
Cause | Boiler exceeding its strength due to a faulty pressure gauge |
Deaths | 17 |
Non-fatal injuries | 20 |
The Morewood Lake Ice Company explosion occurred on December 29, 1910, at the company's plant in Pittsfield, Massachusetts. Twelve men were killed in the boiler explosion and five more died from their injuries.
The explosion occurred on the first day of the ice harvesting season. [1] Around 125 men, mostly Italian and Polish immigrants, gathered in and around the boiler house of the Morewood Lake Ice Company waiting for work. [2] The boiler was a second-hand locomotive boiler that had been purchased from a saw-mill in 1906. It was only used for two to three weeks out of the year when ice was being harvested. The boiler had been inspected in the spring of 1910 and after changes were made, it was permitted by a state inspector to operate at 70 psi (480 kPa). [3]
At 9:30 am, a violent explosion blew the boiler to pieces and sent fragments of iron and timber through the air. Men 400 yards (370 m) away from the boiler house had to dodge debris and a 300-pound (140 kg) piece of the boiler flew over 300 yards (270 m) and cut off five 30-foot-high (9.1 m) treetops. [1] 12 people were killed almost instantly. Some of the bodies were thrown as far as 100 to 200 feet (30 to 61 m) away from the boiler. [2]
The blast could be heard throughout Pittsfield and shook windows as far as one mile (1.6 km) away. [1] Physicians, ambulances, and automobiles rushed to the scene. The injured were transported to the House of Mercy and the dismembered bodies were gathered up and brought to their families. [2] five people died from injuries they suffered in the explosion. [4]
Judge Charles Burke presided over an inquest into the explosion. [1] At the inquest, witnesses testified that on the morning of the explosion, the engineer removed the cap from the safety valve, as he believed it out of order because the boiler blew off at a pressure of 35 to 40 psi (240 to 280 kPa) when it was set for 80 psi (550 kPa). This generated excessive pressure, which, due to a defect or plugging up of the fittings, was not shown by the pressure gauge. As a result, the strength of the boiler was exceeded and it exploded. [3] In his final report, Burke found the cause of the explosion to be the compression screw on the valve and false reading on the gauge, which was attributed to clogging caused by rust from the boiler pipes. He ruled that no "unlawful act[s] of any person now alive contributed to the death of said decedents." [1]
As a result of the accident, Massachusetts adopted stricter regulations regarding boilers. [1]
Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure is the pressure relative to the ambient pressure.
A boiler is a closed vessel in which fluid is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation.
A safety valve is a valve that acts as a fail-safe. An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits. Pilot-operated relief valves are a specialized type of pressure safety valve. A leak tight, lower cost, single emergency use option would be a rupture disk.
A pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.
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A steam explosion is an explosion caused by violent boiling or flashing of water or ice into steam, occurring when water or ice is either superheated, rapidly heated by fine hot debris produced within it, or heated by the interaction of molten metals. Steam explosions are instances of explosive boiling. Pressure vessels, such as pressurized water (nuclear) reactors, that operate above atmospheric pressure can also provide the conditions for a steam explosion. The water changes from a solid or liquid to a gas with extreme speed, increasing dramatically in volume. A steam explosion sprays steam and boiling-hot water and the hot medium that heated it in all directions, creating a danger of scalding and burning.
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A boiler explosion is a catastrophic failure of a boiler.
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