Dear all,
As it is known, reinforcing pads are considered to have the same requirements (impact test, sim PWHT, etc.) as shell pressure retaining material (plate, head, pipe), and they are treated as other materials - as separate components - by UCS-66. What about the transition plates for...
Dear all,
Reference is made to ASME VIII Div.2, Ed. 2023; the question is whether the equations (4.15.27) (4.15.28) (4.15.29) are valid only for reinforcement or wear plate welded to Cylindrical Shell of a Pressure Vessel, or can also be used for reinf. / wear plate attached (not welded) to the...
Dear all,
We use ASME materials (SA-333 Gr6, SA-350 LF2, SA-420 WPL6), for construction according to EN13445-1 (yes, it is allowed).
As per ISO 15608, materials that belong to group 1 but have higher C% (greater than 0,25%), belong to group 11.
Now, as per ASME II, the above materials have...
Hello guys,
I kindly need your assistance to the below (attached sketch for reference):
As you see, it is a branch (corner) weld (Set-on type) of a SA182 Gr. F321 Long Welding Neck (LWN) with thickness varying from 15,87mm to 27,1mm, to the Pressure Vessel Shell, which is a SA387 Gr.11...
Hi everybody,
We are fabricating a Column with dimensions 3700mm ID, 17mm thickness, SA516 Gr70 material (TL-TL does not matter). The Column is now at its final stages of fabrication, and it has a lot of nozzles welded to its shell. These nozzles do not give us a lot of position choices, and so...
Hi to all,
I was wondering if anyone could suggest what video camera (type, model) would be convenient to be used for welding operator of Electroslag Strip Cladding process. Electroslag Strip clading process produces heat, radiation and a lot of light from the melted strip and flux (although...
Dear all,
Reference is made to NACE MR0103-2015, clause 15.2.3
Quoting:
15.2.3 The base materials listed in Clause 13 or Clause 14 are also allowed as weld overlays, provided
they meet the provisions of their respective paragraphs after being applied as overlays. Following
application of the...
Hi everyone, and happy new year!!!!
Our Client needs to make some heat exchangers that are copy of the existing ones, made back in 2004-2005 by others.
They provided to us the data books of the exchangers fabrication. That time, the applicable ASME BPVC edition for the project was 2001, with...
Hi everybody,
We have a pressure vessel to fabricate, with weld overlay. The bond quality shall be checked per SA-578, Level S6. But, level S6 is nowhere within the Code... I only see Class 1, Class 3 and Class 5. What is the compatible Class, for level S6? I believe that S6 is withdrawn some...
Hi,
According to Table 7.2 of ASME VIII Div.II, for Cat D joints, either type 1 or 7, RT or UT is required, together with MT or PT. My question is whether the UT shown in Table 7.2 is "in lieu of RT", or conventional UT could be performed.
Only best result in absolutely necessary time
Hi all,
After having a comment from my client on a RT report regarding the wire IQI used and reported, I found out that ASME BPVC Section V, article 2, refers only to essential wire, but does not refer to "better", like it refers for the hole.
I mean that, in a specific case, the RT was...
Hi guys,
Tube material SA-334 Gr6. thickness 2,77mm, diameter 1".
Client requires impact test according to SA-334 and ASTM E23, at -45 degrees Celcius (in excess of UCS-66), due to PED requirements in Europe. A lot of companies, clients etc do not take into account the UCS-66 of ASME VIII...
Hi to all,
We are experimenting on Tube to Tubesheet strength welding, and we are buffled by RT, which in any case it is pretty difficult to make it, but we managed to do it, anyway.
The thing is that it produces a round indication exactly on the "root" area of the orbital weld (ORBITIG - not...
Hi guys, no matter how much experience you have, there is always room for a difficult to answer question... Here it goes:
Existing Tank made of 3 courses, each one about 2 meters in height, the first course thickness is 1", each course made of 3 plates in full length. Material Carbon Steel, no...
Hi to all!
Well I probably know the answer to this one, but I have to ask...
We are fabricating a Waste Heat Boiler (Heat Exchanger with fixed tubesheets) according to ASME VIII Div.1 Ed.2013.
It is a Stamped (U-designator) Vessel.
The calculations for the tubesheet when performed with UHX gave...
Dear all,
I am facing a case where the existing LWN flanges (SA105) we have in our possession are shorter in length than those required by the new revision of the Pr. Vessel's drawing (they were ordered correctly as per IFC drawing). My question is wether we can elongate the LWN flange by...
We are welding two equal sections of one ellipsoidal head (Di 5700mm with thickness after forming 26mm), and the weld is exactly on the mid line of the head. The two pieces of the head were delivered with slight deviations in dimensions, but nothing serious. Now during welding, even though we...
Dear all,
We need LWN flanges with L=250mm, while we have available a lot of the required diameter and rating but with L=200mm. Is it allowed to lengthen the flange by welding a 2" piece of pipe and then perform NDT? The new weld - if acceptable - will be too close to the circumferential flange...
Hi all,
We are currently working on P91 piping (B31.1), and due to the fact that material available for test coupons is extremely limited or would delay lots of weeks to be delivered, we decided to qualify welders from production welds (after the theoretical training), using volumetric NDE. My...
Hi to all!
The question is as follows:
We have constructed a Column (18mm thickness of SA516 Gr70) which is for H2S service, so PWHT was performed in our premises, in a furnace. Now that the Column is on site, the Client requires some extra internal supports for a new demister to be installed...
