LIGHT HOUSINGS FOR DEEP-SUBMERGENCE APPLICATIONS- 

 PART III. GLASS PIPES WITH CONICAL FLANGED ENDS 



Technical Report R-618 , 



Y-F01 5-01 -07-001 



by 



K. 0. Gray and J. D. Stachiw 



ABSTRACT 



The objective of this study was to evaluate commercially available 

 glass pipes with conical flanged ends for application as transparent housings 

 for underwater lights and instruments. Flanged-end glass pipes in diameters 

 ranging from 1 inch to 6 inches and in lengths ranging from 6 inches to 

 36 inches were imploded under short-term and cyclic external pressure 

 loading. Collapse pressure and recommended operational depth data are 

 presented for one-way trip, round-trip, and cyclical applications. Recom- 

 mendations for end-closure systems are also presented. One prototype 

 light design and one prototype instrument housing design are described. 



Jistribution is unlimited. 



fie & Technical 

 )ringf ield, Va. 22151 



