Hello everyone,
Is anyone aware of industry guidance that discusses how to apply wind/seismic loads from the National Building Code of Canada (NBC) to the design of ASME VIII-1 pressure equipment?
The issue I'm dealing with centers around the different design basis of the two codes. NBC-2015...
Hey everyone,
Grammar question here for interpreting codes...
API-570 paragraph 8.2.8(d) - associated with closure welds:
d) MT or PT shall be performed on the root pass and the completed weld for butt welds and on the completed weld for fillet welds.
Question: for socket weld closure welds...
Re: thread794-420069
In the thread linked above, weldstan stated:
Does anyone have any references to column failures that occurred due to in-service weld repairs? I did some online digging and nothing jumped out at me.
Thanks,
Marty
Hey everyone,
I was reviewing some in-service inspection t-min values for an ASME VIII-1 vessel. Currently we are setting the initial t-min value for piping nozzles as t-nom - CA. For a 12"-sch.120 piping nozzle with 1/8" CA for example, this would be 1" - 0.125" = 0.875". When the nozzle neck...
I dug through many old threads hunting for the best path forward to handling inspection for B16.5 blind flanges, and can't find any solid recommendations. I'll lay out the issue, and provide some discussion, but I would love to hear how you all approach this issue.
When blinding a standard...
It's been a long while since I designed equipment utilizing a reverse flange. We use Compress for our design calculations, and I was surprised by the specified weld size they came up with. I brought this up with Compress and they referenced a code paragraph that I'm not sure applies. I'd love to...
I've been having some disagreements with colleagues regarding fillet weld sizing on the back-side of fabricated lap joint stub-ends for use with standard ASME B16.5 lap joint flanges on ASME VIII-1 equipment. Any other perspectives would be much appreciated.
Perspective #1:
ASME B16.9 Table...
thread292-434856
thread794-342249
Well, I finally got a response from the ASME B16.5 code committee, and it isn't what I was hoping for:
Background:
- ASME B16.5 currently lists A479 as the forging spec for 904L material. This spec is titled: Specification for Stainless Steel Bars and Shapes...
Hello,
This is a new one for me... so any help would be appreciated.
Our shop built an ASME VIII-1 vessel back in the late 2000's for use in North America. It was fabricated and stamped with an ASME U-stamp. A customer has now asked about buying the vessel and moving it to Europe.
I know for...
Hello,
I have a customer that is asking us to purchase material that complies with ASTM A105 supplementary requirement S5.
We are an ASME shop and normally only handle ASME specs. ASME BPVC IIA 2019 states that it matches A105-05, and there is no supplementary requirement S5.
Can anyone that...
Hey everyone,
We've been asked by a customer to fabricate a vessel that would require a 14,000lb duplex (S32205) forging.
SA-182 has an annoying scope limitation, indicating that it is only to be used for components with a maximum weight of 10,000lb. SA-182 then points to a couple of other...
I have a problem that I'm trying to sort out relating to ASME VIII-1 and NBIC Part 3 design responsibility. I'm wondering if anyone has a perspective on this issue.
This question relates to the supply of replacement parts for existing equipment. We are an ASME VIII-1 shop, and are often asked...
Hello,
We have had an AI bring up an issue with ASME B16.5 flanges, and I honestly don't know how to proceed... HELP!
Per ASME VIII-1 (2017) table U-3, the acceptable edition of ASME B16.5 is the 2013 edition.
ASME B16.5 however was updated in 2017, and our regular suppliers are now only...
Hello,
Does anyone know if there has been any progress within the ASME committees on additive manufacturing of pressure equipment?
Today I was shown an ultra-compact heat exchanger, that was additively manufactured in Inconel 625.
Fortunately, it is still small, and meets the exclusion...
Hello,
Code: ASME VIII-1 (2017)
When you guys are working on heat exchangers where you have different levels of PWHT and/or radiography on the tubeside vs. shellside, how would you mark this on your nameplate? Does the extent of PWHT and radiography cover the entire vessel, or can we separate...
Hello,
We are working on a job where the customer wants to use a diaphragm gasket. This is something that I am not familiar with, and I am trying to figure out how this will work within the scope of the ASME VIII-1 App.2 flange design rules.
This gasket will be used in a heat exchanger between...
Hello,
I might just be blind as a bat, but I can't find anything in ASME B16.5 that specifies the required radius on the backside of a RFWN flange. I've highlighted the radius in question below:
Does anyone know what this radius should be?
Cheers,
Marty
I'm working on a heat exchanger design in accordance with ASME VIII-1, and have been posed an interesting question by a reviewer. First off, I have attached a screenshot of our tube layout. This layout was specified by our customer, we did not come up with it...
The reviewer is asking us to...
Hello,
I am working on two jobs being fabricated from 904L (N08904) material (B31.3, VIII-1), and the nozzles should have 904L B16.5 RFSO flanges.
Per ASME B16.5 (2017), the listed forging spec for this material is A-479. Unfortunately, when we request quotes from vendors, they all regret on...
Hello,
We have a fixed-tubesheet heat exchanger in our shop that we have been asked to retube. Here are a few quick stats:
32"ID
15'-2.25" F/F Tubesheets
282 x 1.25" OD x 16Ga Tubes
4 Baffles
Our normal retubing procedure is to collapse, remove, and replace batches of tubes at a time. Doing...
