PURPOSE OF STUDY 



Commercially available off-the-shelf glass pipe used in the chemical 

 industry is available in a variety of lengths and diameters (Figure 1). Due to 

 the wide use of this material in the industry, it is mass produced and is much 

 less expensive than either custom-fabricated or limited-production housings 

 of similar dimensions fabricated from either metal or glass. In addition, the 

 widespread and continuing use of standard glass piping assures a continuing 

 supply of standardized sizes and formulations. Thus, if successful designs 

 of underwater light and instrument housings based on these types of glass- 

 ware can be developed, low acquisition and replacement costs can be 

 guaranteed for the future. 



The purpose of this report is to document the experimental study 

 of readily available glass pipe for use in underwater housings, to present 

 data on its performance, and to offer a limited number of designs for 

 instrument and light housings utilizing glass pipe as the main component 

 of the housinq. 



Figure 1. A sampling of the variety of glass pipe diameters and lengths 

 tested in this program. 



