Estimates of the size of the explosion have ranged from 250–300 tons TNT equivalent to up to 10 kilotons TNT equivalent. The explosion occurred after wheel sparks from the two passenger trains heading in opposite directions ignited this flammable cloud. Without anyone knowing, a faulty gas pipeline 900 metres (3,000 feet) from the line had leaked natural gas liquids (mainly propane and butane), and weather conditions allowed the gas to accumulate across the lowlands, creating a flammable cloud along part of the Kuybyshev Railway. VL10-901, one of the locomotives involvedĪt 1:15 a.m., two passenger trains of the Kuybyshev Railway carrying approximately 1,300 vacationers to and from Novosibirsk and a resort in Adler on the Black Sea exploded, 11 kilometres (6.8 miles) from the town of Asha, Chelyabinsk Oblast. Additionally on the night of the explosion there was increased pressure in the system due to increased demand. In 1985 an excavator caused severe mechanical damage to the pipe in the form of a 1.7 metres (5.6 ft) crack during bypass construction. In May 1984 the Soviet Ministry of Petroleum had canceled the installation of an automatic real time leak detection system. The pipeline had originally been designed for the transportation of oil but had been reformatted to transport natural gas liquids for the Soviet petrochemical industry. An annual commemoration is usually held at the Ulu-Telyak station, near the disaster site there is a memorial at the site. The accident was named after Ufa, the largest city in the Bashkir ASSR, although it occurred about 75 kilometres (47 miles) east of the city. It is the deadliest rail disaster during peacetime in Soviet/Russian history. The Ufa train disaster was a railway accident that occurred on 4 June 1989, in Iglinsky District, Bashkir ASSR, Soviet Union, when an explosion killed 575 people and injured 800 more. For more guidance, see Wikipedia:Translation.You should also add the template to the talk page.A model attribution edit summary is Content in this edit is translated from the existing Russian Wikipedia article at ] see its history for attribution. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation.If possible, verify the text with references provided in the foreign-language article.
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