Welding a small pressure test vessel...

I'm not a certified welder in any way, shape or form. Mostly self taught
though I did take an evening class at a tech school once. I do 95% TIG
on steel with my Syncrowave 250.

I have a project that I need to do which is a small pressure test
vessel. Max operating pressure is 150 PSI, air only, at least two safety
valves. Rough design is about a 12" length of 8" dia .5" wall steel
pipe, fixed welded on base plate and a removable top cap.

Figure the top cap should have say six bolts to secure it, most likely
hand knob style on a loosen and swing to the side out of slot in cap
type arrangement for convenience. The top cap will also need to have a
view port, presumably 1" lexan well reinforced with a couple steel cross
bars.

Recommendations on how to do this safely? Am I crazy to attempt it? It's
fairly low pressure and small enough to be overbuilt without excessive
cost. Were I able to do this as a hydrostatic chamber I'd be perfectly
comfortable, but as an air type chamber the potential catastrophic
failure mode makes me nervous.

Thanks,

Pete C.
.

Relevant Pages

  • Re: Welding a small pressure test vessel...
    ... I have a project that I need to do which is a small pressure test ... Rough design is about a 12" length of 8" dia .5" wall steel ... Figure the top cap should have say six bolts to secure it, ... Easier yes, but way too expensive, like 5X what it should cost to build ...
    (sci.engr.joining.welding)
  • Re: Welding a small pressure test vessel...
    ... I have a project that I need to do which is a small pressure test ... Rough design is about a 12" length of 8" dia .5" wall steel ... Figure the top cap should have say six bolts to secure it, ... but as an air type chamber the potential catastrophic ...
    (sci.engr.joining.welding)
  • Re: Welding a small pressure test vessel...
    ... I have a project that I need to do which is a small pressure test ... Max operating pressure is 150 PSI, air only, at least two safety ... Rough design is about a 12" length of 8" dia .5" wall steel ... Figure the top cap should have say six bolts to secure it, ...
    (sci.engr.joining.welding)
  • Re: Welding a small pressure test vessel...
    ... I have a project that I need to do which is a small pressure test ... Rough design is about a 12" length of 8" dia .5" wall steel ... Figure the top cap should have say six bolts to secure it, ... Plunger has been removed from a HF $10 grease gun. ...
    (sci.engr.joining.welding)
  • Re: Welding a small pressure test vessel...
    ... I have a project that I need to do which is a small pressure test ... Rough design is about a 12" length of 8" dia .5" wall steel ... Figure the top cap should have say six bolts to secure it, ... but as an air type chamber the potential catastrophic ...
    (sci.engr.joining.welding)