Unclassified 



iinlv Class. fu 



DOCUMENT CONTROL DATA -R&D 1 



Naval Civil Engineering Laboratory 

 Port Hueneme, California 93041 



Unclassified 





LIGHT HOUSINGS FOR DEEP-SUBMERGENCE APPLICATIONS-PART III. GLASS 

 PIPES WITH CONICAL FLANGED ENDS 



Final; November 1966— June 1968 



K. 0. Gray and J. D. Stachiw 



March 1969 



48 



5 



6 PROJECT. o Y-F01 5-01-07-001 



TR-618 



"■ ?,J""po"V°''" ~°'" """' °""" ""'"'"^" """"■=>■ "- •"■«"•" 



This document has been approved for public release and sale; its distribution is unlimited. 





Naval Facilities Engineering Command 

 Washington, D. C. 



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. Recommendations for end-closure systems are also pre- 

 sented. One prototype light design and one prototype instrument housing design are described. 



DD 



.1473 



Unclassified 



S/N 010 1-607.680 1 



