Section VIII Div 1 U-1 Interpretation
Section VIII Div 1 U-1 Interpretation
(OP)
I quote:
U-1(c)(2) based on the Committee's consideration, the following classes of vessels are not included in the scope of this Division; however, any pressure vessel which meets all the applicable requirements of this Division may be stamped with the Code U Symbol:
(f) a vessel for containing water under pressure, including those containing air the compression of which serves only as a cushion, when none of the following limitations are exceeded:
(1) a design pressure of 300 psi (2 MPa);
(2) a design temperature of 210 deg. F (99 deg. C)
First, tell me what you think ASME was thinking when they wrote this and then I will tell you our application and then you can tell me if you think this part of ASME applies or not.
TYIA,
heaterguy
U-1(c)(2) based on the Committee's consideration, the following classes of vessels are not included in the scope of this Division; however, any pressure vessel which meets all the applicable requirements of this Division may be stamped with the Code U Symbol:
(f) a vessel for containing water under pressure, including those containing air the compression of which serves only as a cushion, when none of the following limitations are exceeded:
(1) a design pressure of 300 psi (2 MPa);
(2) a design temperature of 210 deg. F (99 deg. C)
First, tell me what you think ASME was thinking when they wrote this and then I will tell you our application and then you can tell me if you think this part of ASME applies or not.
TYIA,
heaterguy





RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
Patricia Lougheed
Please see FAQ731-376 for tips on how to make the best use of the Eng-Tips Forums.
RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
The requirements for Code stamping are very clear regarding pressure, volume and temperature. If a pressure vessel you are intending to design and install is located in a Jurisdiction that requires a U-stamp for pressure vessels, one has to comply for operation - this is the law. In some cases where vessels are exempt under Jurisdictions, one can still design and fabricate a vessel that meets the requirements of ASME Section VIII, Div 1 and can be stamped accordingly.
RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
I know I wouldn't want to be in the vicinity when a 299-psi 209 degree tank let go.
RE: Section VIII Div 1 U-1 Interpretation
heaterguy-Does this thing have valves? Can you isolate it?
Could be considered piping~ See U-1(c)(2),(c),(d),(e).
You must consider the requirments of the local Jurisdiction and see what the locations insurance carrier requires.
If in doubt build it to Code. The Stamp Holder's AIA could help define.
RE: Section VIII Div 1 U-1 Interpretation
What is the intent of U-1(c)(2)(f)-(1)&(2)?
My best "guess" at this point is that ASME wants sections 1 or 4 to apply. However, I know very little about those sections. May someone please clarify this for me?
RE: Section VIII Div 1 U-1 Interpretation
Steve Braune
Tank Industry Consultants
www.tankindustry.com
RE: Section VIII Div 1 U-1 Interpretation
Your questions are very confusing. First you ask for the thinking around 300 psi @ 210F then your application is a piece of pipe 600 psi @ 500F.
I suspect your application can be considered a piping system. Refer U-1(c)(2)(d) and (e).
RE: Section VIII Div 1 U-1 Interpretation
ASME give 300 psi and 210F as not to exceed. My application, for illustration purposes, is 600 psi @ 500F. It is an ASME pressure vessel and does require a code stamp. Still, there has not been a direct answer to my original question, except for Patricia, who answered 1/2 of the original question.
TYIA,
heaterguy
RE: Section VIII Div 1 U-1 Interpretation
This is just my impression, but I think that ASME is giving an "out" for low pressure vessels that contain water. For example: a home water heater. It will contain water and air, will not be above 300 psi and shouldn't be exceeding 210 degrees F (actually I think they're supposed to be set somewhere around 165 to 185F.) So Section VIII doesn't apply to them. And I'm pretty sure that neither do Sections I or IV. But if you go above the limits of U-1(c)(2)(f)-(1)&(2, like in your application, then you DO have to meet the Code.
I also think that this whole issue has been made more complex than it needs to be.
Patricia Lougheed
Please see FAQ731-376 for tips on how to make the best use of the Eng-Tips Forums.
RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
You are my hero!!!
I have been reading this WRONG. Of course the referenced code is a double negative..."are not included when none are exceeded".
But you have correctly stated the obvious and helped resolve this issue, completely.
Thanks,
heaterguy
RE: Section VIII Div 1 U-1 Interpretation
I did answer your original question.
RE: Section VIII Div 1 U-1 Interpretation
This is what makes it fun and also why AIs are gouchy.
RE: Section VIII Div 1 U-1 Interpretation
My apologies. You did answer my original question, but at the time I was still looking at it backwards. Now that I understand the wording, "Read the words", your answer makes sense.
Thanks,
heaterguy
RE: Section VIII Div 1 U-1 Interpretation
Do AI's get more gouchy when you point out their typos?
jt
RE: Section VIII Div 1 U-1 Interpretation
From Grouch, a person with a bad attitude and gout, an accumulation of uric acid crystals in the joints.
What typo?
RE: Section VIII Div 1 U-1 Interpretation
RE: Section VIII Div 1 U-1 Interpretation
Does ASME Section VIII, Div. 1 apply?
NO... I think you fall into the Sec. I High temp
boilers.
genb.