CONTENTS 



page 



TERMINOLOGY iv 



INTRODUCTION 1 



EXPERIMENTAL PROCEDURE 2 



DISCUSSION 11 



General 11 



Effect of Lcxidlng Conditions 16 



Effect of Variations in Flange Design 16 



FINDINGS 17 



CONCLUSIONS 17 



APPENDIXES 



A — Discussion of Window Mountings 18 



B — Failure Modes of Flat Acrylic Windows 27 



C — Axial Displacement and Critical Pressures of Flat 

 Acrylic Windows Subjected to Hydrostatic Pressure 



in DOL Type III Flanges 48 



REFERENCES 77 



MBL/WHOI 



D D301 D04D3flD M 



