The Locomotive . line. In such cases acheck valve should always be required in this line. The water line return connection* can be used on all vapor systems(jf which we have knowledge, and, in fact, is recommended by somenrinufacturers. Whereas such a connection will not overcome thedifficulty of water being held out of the boilerby an unduly highsteam pressure, it does prevent the for^-ing out of the water below asafe level. *.See The Locomotive, July 1920. 200 THE LOCOMOTIVE, [July, Boiler Explosion at Ninety Six, S. C. THE approximately simultaneous explosion of two boilers occurredAugust 1
The Locomotive . line. In such cases acheck valve should always be required in this line. The water line return connection* can be used on all vapor systems(jf which we have knowledge, and, in fact, is recommended by somenrinufacturers. Whereas such a connection will not overcome thedifficulty of water being held out of the boilerby an unduly highsteam pressure, it does prevent the for^-ing out of the water below asafe level. *.See The Locomotive, July 1920. 200 THE LOCOMOTIVE, [July, Boiler Explosion at Ninety Six, S. C. THE approximately simultaneous explosion of two boilers occurredAugust 14, 1926, at the plant of the J. H. Self Lumber Company,Ninety Six, S. C. Seven persons were killed and three were in-jured. The property loss was estimated to be $15,000. A generalview of the scene is given in Fig. i. The circumstances leading up to the explosion are mill had started up in the morning as usual, but had to shut downtemporarily, after running for about an hour, in order to make some. Fig. I. minor repair. With practically no load on the boilers during thisinterval, it is stated the firemen continued to pile on wood waste fuelwith the result that the safety valves soon began to blow. Thesevalves were said to have been set to relieve the pressure at no spite of the relief afiforded by the safety valves, the pressure on theboilers continued to rise, 140 lbs. having been noted shortly beforethe explosion by one of the survivors. A few moments after thisobservation both boilers exploded. The foregoing evidence, togetherwith the violence of the explosion, would seem to indicate over-pressure,resulting from insufficient safety valve capacity, as the cause of theaccident. As all of the mill employees were at work at the time, the iy27. THE 1. O C O M O T 1 \ E, 201 casualties were heavy. Four men were practically instantly of them a minor son of the superintendent of the mill and anothera 12 year old negro boy, and six men were injured,
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