[PSUBS-MAILIST] Tap instead of weld

[hank pronk via Personal_Submersibles]

Jon,I struggled with the question for Elementary 3000.   Gamma has several hoes drilled and threaded in the hull with no reinforcement, just a drilled hole. Gamma has a 1\2 thick hull.  Elementary 3000  also has a small hole drilled in the hatch and threaded.  That is 1 inch thick, and tested to 2,900 feet fresh water with no issues.  My non engineering opinion is it is fine.Hank

On Friday, August 18, 2017, 9:29:56 AM MDT, Emile van Essen via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Jon , Conversion mistake

The hull should be 1/2"thick.

Br, Emile

-----Oorspronkelijk bericht-----
Van: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
Namens Jon Wallace via Personal_Submersibles
Verzonden: vrijdag 18 augustus 2017 15:43
Aan: Personal Submersibles General Discussion
Onderwerp: [PSUBS-MAILIST] Tap instead of weld


On a thicker hull, installing a small penetrator (1/4 male NPT), is there
any structural reason why one could not just drill a tap such a fitting
instead of welding it?


Jon

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