determining joint efficiencies
determining joint efficiencies
(OP)
Is there a simplified version or wording of UW-11, in ASME SECTION 8, Div. 1?
thanks
thanks
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determining joint efficiencies
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RE: determining joint efficiencies
UW-12 JOINT EFFICIENCIES
Thread292-40534
Leonard@thill.biz
www.thill.biz
RE: determining joint efficiencies
E
1.1 Full RT --> 100%
1.2 Spot RT --> 85%
1.3 No RT --> 70%
2) Single-Welded Butt-Joint (Type 2)
(Backing Strip in place)
2.1 Full RT --> 90%
2.2 Spot RT --> 80%
2.3 No RT --> 65%
3) Single-Welded Butt-Joint (Type 3)
3.1 No RT --> 60%
Note, equivalent welds to item 1.1 above include Single-Welded Butt-Joint back chipped and welded from the inside;
those may have 100% joint efficiency.
Weld Categories A, B, C, D (UW-3)
A --> Longitudinal Seams
B --> Circumfrential Seams
C --> Terminal Weld end in a flange
D --> Attachments
Type of Radiography
RT-1 --> Full lenght, full radiography of a;; butt welds
(except >= NPS 10 or tn >= 1 1/8"
RT-2 --> Cat-A: Full Lenght
Cat-B: T-joints
RT-3 --> Spot Radiography (UW-52)
RT-4 --> Partial / No Radiography
Seamless Heads & Vessel Sections --> 100%
Piping SAW & Seamless --> 100% ERW --> 85%
RE: determining joint efficiencies
A: No. The best summary I know of is in the Pressure Vessel Handbook, Megyesy, part I section 7, welding of pressure vessels. This goes into what they mean by "types" and "category" and levels of x-ray. Then charts and tables tell you joint efficiency for various combinations of the above.
Please don't take this the wrong way. I do not know you, your problem or your background. And I am new to this forum. I strongly recommend you talk to a specialist about this as there are many considerations to joint efficiency.
RE: determining joint efficiencies
go to PVeng.com and download the spreadsheet which give the data available in Megyeseys book in softform.
RE: determining joint efficiencies
RE: determining joint efficiencies
I agree with deanc (Specifier/Regul) ask the AIA.
Leonard Stephen Thill
Leonard@thill.biz
www.thill.biz
RE: determining joint efficiencies
thanx isthill & deanc
RE: determining joint efficiencies
Also, Nooter Fabricators, Inc Quick reference Guide ASME PRESSURE VESSEL CODE (SECTION VIII, DIV. 1. Has all Testing Notes & Reference Notes.
The software program was free.
Leonard@thill.biz
www.thill.biz
RE: determining joint efficiencies