T H E J O U R N A L OF I I V D U S T R I A L A N D E i V G I N E E R I N G C H E M I S T R Y
Jan., r g r g
where log Cr = 10.69464.
The thernral ompertics of steam at very high pressures and temperatures are stated to be as follows: ~~
--
Heat content of Lacent Weieht or heat 1 cu. f i . Li mid Vapor Lbr. W.?.U.B.T.U.B. T.U. 3.68 4.15 5.35 6.63 9.86 12.46 20.92
604.5 633.0 663.0 700.0 74.5.0
823.0 921.0
1164 1151
1136 Ill? 1080 1016 921
560 518 473 412
335 193 0
A HIGH PRESSURE VALVE The International Oxygen Company laboratory has developed a new valve for pressures up to 2,500 Ibs. I t is specially recommended for oxygen, hydrogen, nitrogen and simildr gases. It is made oi metal throughout, no packing being used in any part. The body is forged Tobin bronze, while the other parts are made oi suitable metals which are non-corrosive to gases or to any weather conditions. The cross section shows the simple construction of the valve. Every part is accessible and, if worn out, can be easily replaced at little expense. The diaphragm is made of very tough and springy material that will withstand perfectly all the strain put upon it, without any possibility of its cracking or breaking even after many years of service, The diaphragm takes the i h c e of packing material, and in this way thc usual stuffing box is entirely
-. .
..- . . .. . .
... .
-.
75
opcning of the valve. It is not necessary, therefore, for the gas to raise the diaphragm; in this way all the gas from the cylinder can be used, down to atmospheric pressure. An essential part of any high pressure valve is its safety plug. In this valve is a very ingcnious device which has received the approval of the Biireau of Explosives of the Interstate Commerce Commission, The plug is filled with fusible metal melting at, or below. the. boiling point of water. I t is provided with three passages, each in a st.raight line with the direct action of the gas in the cylinder to permit the outflow of the metal; and is further provided with a hcmispberical scat and a pliosphor bronze disc. Thissafety plug is scrwed into the body of the valve and fornis B tight seat by compressing the phosphor bronze disc. K O pat of this plug projects beyond the body of thc valve, thus protecting i i against breakage. The safety will not blow when submitted to the direct rays of the sun or any other atmospheric condition, but will blow when placed in a fire, before the expansion of the gas can do any damage to the cylinder.
OFFICIAL FIRE-TEST WITH TREATED WOOD The British Fire-Prevention Committee have just issued their report KO. 193, regarding a Test carried out on July I with a match-boarded pine partition, in which the pine was impregnated by a proprietary process, with the object of making it fire-resistant. The partition comprised studs with 6 j s in. grooved, tongued and bcndcd match-boarding on both sides, and i t measured 10 it. wide by 9 it. high. The test was conducted undcr the cammittce’s usual conditions, and was a forty-five minutes’ test a t tempemtuns that rose to ifi30DF.. whereupon water was applicd irom a s1riiBm fire engine. The main features in the official “Summary” of the test are that smoke appeared freely through seve‘eriil joints after thirtyeight minutes, and t h a t aitcr forty minutcs. scorching apprared a t sevcral joints; lurthcr, that aiter iorty-four ininuics a glow was s ~ e na t four points. Upon the application of water, water came through several of the vertical joints. The fir?-resistance was thus considerable ior wood-work, although thc minimum classification as to such a partition afiordirig “Temporary Protection” under the British Fire-Prevention Committee’s Stan~llards--n~ccssitating resistance for forty-fivc niiiiutts----wns not obtained by a few minutes. I t would have been interesting if the partilion had been tested side by side with a match-boarded pine partition which Imd not been impregnated.
CCAL IN ICELAND .
. -
.. . . . . -
.
The ferr of a coal famine in Denmark on account of the war has caused the coal deposits a t Duiansdrle, in the Arnar firth, eliminated. I n the case of high pressure oxygen gas, the stuffiI>g to be examined, according toEngineering &ondon) 98 (1914). 604. box is extremely objectionable, as one niust resort to the use oi and the results of the investigation are understood to he enrubber, leather or similar inflammable materials. couraging. The deposits are likely to prove very extmsive, and The diaphragm is slightly concave, and is normally set away the qnality is satisfactory and improves the deeper one gets. from the seat of the valve a sufficient distance to permit a full They are iizht upon B firth with excellent anchorage for vc-els.
I
I
NOTES AND CORRESPONDENCE ARGON ON A COMMERCIAL SCALE
Editor of the Journal of Indzcst&al end Engineering Chemistry: We thought it might be of interest to the American chemists to know that during the past week the American Cyanamid Company have been shipping several flasks of one hundred (100) cubic feet caoacitv, . . of ARGON. nrobablv the first made on a commercial scale in this country. The manufacture of Argon by this company has been placed upon an industrial basis so that these shipments hehlg made regularl,, day, in no sense i s i t an experimental undertaking. The credit ior the dcvelmment oi this industry belonrs . to Mr. G. A. Hendrie of our company, and we believe it worthy
of record that this fact be coupled with his namc in the history of American Industrial Chemistry. A~EERICAN CYANAMID COMPANY Per 1%’. S. LANDIS NIACARI PALLS.O ~ I l i K i o December 10. 1Y14
THE B A m ~ ~
C O M p APRIZES ~y
Editor of the Joi‘rirnl of Jndirstriul and Engineering CiLcmistry; The Barbcr Asphalt Paving Company has decided to offer studcnts in Zrigincerin{: Schools a n 0. portunity t o compete For $1,in prizes for essays on highway construction. This offer
