Unclas?:ififirl 



DOCUMENT CONTROL DATA R&D 



Naval Civil Engineering Laboratory 

 Port Hueneme, Calif. 93041 



Unclassified 



PRESSURE VESSEL CONCEPTS — Exploratory Evaluation of Stacked-Ring and 

 Segmented-Wall Designs With Tie-Rod End-Closure Restraints 



SCBIPTIVE NOTES (Type of report and Inclusive datee) 



Final; October 1964-October 1965 



TH0RI51 (FIrtI neme, middle Inlllel. leal name) 



J. D. Stachiw 



March 1970 



91 



Y-R009-03-0 1-004 



TR-666 



I (Any other nuTr\bera that 



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



Naval Facilities Engineering Command 

 Washington, D. C. 20390 



An exploratory experimental study was conducted to evaluate the stacked-ring 

 and segmented-wall pressure vessel concepts. The evaluation consisted of (1 ) testing to 

 destruction stacked-ring and segmented-wall pressure vessel models with tie-rod end-closure 

 restraints and (2) evaluating a series of seal designs utilized in the sealing of the joints 

 between the pressure vessel end closures and the cylindrical pressure vessel body. The test 

 results indicate that the stacked-ring pressure vessel design is approximately 50% heavier than 

 a multilayered pressure vessel of same internal diameter length, material, and pressure capability. 

 The segmented-wall pressure vessel design is approximately 8 to 9 times heavier than a 

 multilayered pressure vessel of same diameter, length, material, and pressure capability. The 

 free-floating, self-energizing radial seal system provided the most reliable and extrusion-proof 

 sealing for vessels with considerable radial dilation and axial end-closure movement. 



DD 



.1473 



(PAGE I) 



S/N 0101.807-6801 



Unclassified 



Security Classifii 



