Canadian transportation & distribution management . committee on tank cars has been mainlythe continuation of its efforts to secureimprovement in certain details of con-struction, principally the safety valve,bottom discharge valve, dome closurearrangement and anchorage of tank tounderframe. In this work the com-mittee has had the benefit of the co-operation of the Bureau of Explosives,American Petroleum Institute and theNational Petroleum Association. that the escape is always on one side,indicating a tendency of the valve disc-to cock. Special guides have been triedto restrain this tendency
Canadian transportation & distribution management . committee on tank cars has been mainlythe continuation of its efforts to secureimprovement in certain details of con-struction, principally the safety valve,bottom discharge valve, dome closurearrangement and anchorage of tank tounderframe. In this work the com-mittee has had the benefit of the co-operation of the Bureau of Explosives,American Petroleum Institute and theNational Petroleum Association. that the escape is always on one side,indicating a tendency of the valve disc-to cock. Special guides have been triedto restrain this tendency to cock, andspecial springs have been made in aneffort to secure true closure, but so farwithout success. Some of the valve manufacturers arewilling to make other modifications, butbefore asking them to do this, the com-mittee is endeavoring to get from theoil trade some definite information asto the extent of the losses which canbe properly charged to the safety available data indicates that withstraight refinery products the losses are. section a-a I- i - Fig. 4. Journal Box. See report on page 45S The following are the specifications :- Classification Size Box. Journal A B C D E F G H I J K u M C 6 by 9 614 7:!4 PA 5ft 4% 5% 5% 5% 4% i% l A 4% 12 D 5% by 9 614 7% 6* 5% 5% 5% eys 57s 5% i% 1ft 4% 12% E 6 by 11 7% 8% u 6Y± 5% 5% 6% 6Yi 1% 1% 4% 14»4 F 6% by 12 8% 9!4 7 A 6% 6% 6% 6% 7 7V4 1% 1% 5% 14% MC. N O P Q R S T T U V w X Y C 5 by 9 8% 1% 4% 5% 4 3% 14 % 9 3% 1% 1 3% D 6% by 10 9% 2 4% 6% 4 . 4 1A 9% 3H iMt 1 3% E 6 by 11 11% 2% 5% 1% 4% 4% % IS 10% 4 1% 1% 4% F 6% by 12 11% 2% 6 7% 5% 4% % li 4% iy2 1% 4% Safety Valves.—Additional tests havebeen made at Altoona of the experi-mental designs submitted by manufac-turers of locomotive safety valves,which had been modified as the resultof the tests referred to in the 1920report; and also of other modificationsof the standard design, includingchanges in the dimensions of the valvediscs, non-corrosive
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