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Not knowing much about strain gauges - why would the response curve be necessary? Doesn't a particular resistance translate to a particular strain - in this case it would be negative.

I need to measure the negative strain after autofrettage (60,000 psi) of a thick walled vessel. In the past, I have used special sealing glands to connect the strain gauges to the outside where I could record my data. However, these were expensive and prone to problems. Would it be viable to...

Thanks gents - or ladies whatever the case is. I will be getting a coupling to do this with. roadapple

I was hoping for an outside fillet weld with the thread-o-let- but am guessing that the moment with the thicker plate is the reason they limit the thickness of the vessel. I have room to weld a coupling in the arrangement shown in UW-16.1 (i) - because my pipe is 8.625 od the curvature makes...

Question: I am doing a demonstration vessel with 8" sch 80 pipe (1/2" wall), a 8" pipe cap and flange at opposite ends. I intend on putting a thread-o-let on the side of the vessel. I have all my materials on hand and now I see in my design calc's that UW-16 (3)(a)(1) is limiting me to 3/8"...

Exactly. I see that UG-35.2 (and non-mandatory FF) addresses this type of closure, but there is not a lot of guidance as compared to the other design requirements.

prex - I found the section - Appendix 2 under the scope it addresses the "other" bolting methods and the use of rings instead of standard hubs/flanges. thanks again for your help. roadapple

prex, Thanks for the help. Now....where are those attachments located? This is like "where's waldo". roadapple

Background: I am designing an ASME Div.1, -20 to 100, MAWP 150 psi, water filter. It is constructed of 42" dia pipe (~26 long), with a welded head on the bottom, 10" inlets and 10" outlet come thru the bottom, the top head is constructed of a head welded into a ring and is made for easy...

Thanks for the information. I truly appreciate it. roadapple

Thank you first of all for your response. If I use a pipe cap - questions: 1. Where can the "standard" cap dimensions be found? 2. How can the 0.7 <=L/D<=1.0 ever be met? 3. Does a pipe cap fall under torispherical or semi-elliptical? If I am assume that the pipe cap is torispherical. The...

Concerning the rules in Sect. VIII, Div. 2: for torispherical heads. Step 2 page 4-50 0.7 <=L/D<=1.0 (eq. 4.3.5) or go to Part 5. I am designing a vessel out of 8 inch pipe with torispherical heads. The D=7.625 in and the L=8.625. Because the inside crown radius equals the outside diameter...

Thanks for the responses. I spent the better part of a day trying to find the answer calling all the div 2 shops I could find. In every case where I could get an answer the shop was using third party engineering services. So, I could not find an answer. The insurance carrier (handling the...

I can't find it in the rules and regs. So, I am going to call some U3 shops and ask them myself. I will report back. roadapple

JoeTank I would agree with you in principle as I thought the same thing. However, the state board told me just the opposite. Currently, I design stuff day in and day out under the exemption. The API standard doesn't require a PE to stamp off on anything (at least the one we are under)...