Gentlemen:
Interpretation VIII-1-01-61 reads as follows:
Question: A nozzle is located in a shell made of welded pipe for which the allowable stress listed in Section II, Part D has a factor of 0.85 applied. When determining the minimum nozzle neck thickness in accordance with UG-45(b)(1) of...
Mike:
Thank you for your comments. You are right I shall use option 1. My doubt came because this interpretation uses the words “excess area of metal…”, so I prefer to ask.
Best Regards.
Gentlemen:
Interpretation VIII-1-83-341 reads as follows:
Question: For the nozzle configuration shown in Fig. UG-40 sketches (e), (e-1), and (e-2), the rule given in the Note beneath the sketches is followed to establish te. Once te is established, limits of reinforcement are established...
Mike:
Thanks for your comments. As a fact I shall tell you that I also considered using the required moment of inertia to calculate the required thickness for a stiffener ring, but I’m not quite sure this would be an acceptable approach.
With regards of UG-20(f) I read this paragraph a number...
Gentlemen:
In ASME-VIII-1 paragraph UCS-66(a) states that:
Components, such as shells, heads, nozzles, manways, reinforcing pads, flanges, tubesheets, flat cover plates, backing strips which remain in place, and attachments which are essential to the structural integrity of the vessel when...
On UG-33(d) take a look into Table UG-33.1, this table is in terms of outside dimensions, skirt outside diameter Do, outside axis ho, then you get factor ko and then Ro = ko*Do. This table covers a range from 1.0 to 3.0 but since you mention inside dimensions you must check if outside dimensions...
Mike is correct, take a look into following interpretation, question 2:
Interpretation: VIII-1-83-131
Subject: Section VIII, Division 1; 1-5 and 1-8
Date Issued: June 20, 1983
File: BC82-209
Question (1): If reinforcement is required at the cylinder-to-cone junction and a compression ring...
Just a clarification:
SA-387 Gr 21 and Gr 22 belong to curve C, IF normalized and tempered or liquid quenched and tempered. See Figure UCS-66 note (3)(a).
Regards.
I went into a similar situation recently, and could not find anything in Secc. II-D to define “P.L.”.
However take a look into Figure HA-5, you will notice that each curve has two segments, the left side segment is a straight line, and then it reaches what I call the “inflection point” meaning...
Gentlemen:
This is the first time I have the need to use Figure CS-3-Metric in my calculations for VIII-1, and need to make sure on the following:
For external pressure calculations in ASME-II-D Figure CS-3-Metric states that this figure is for Carbon Steel and Low Alloy Steels with SPECIFIED...
You can find this interpretation in the ASME web site using the following link:
https://cstools.asme.org/Interpretation/SearchInterpretation.cfm
I cannot talk about the 2017 edition of the code I still don’t get it. I understand that an interpretation remains valid until specifically annulled...
Interpretation VIII-1-16-89 reads as follows:
Question: Do the joint efficiencies listed in Table UW-12 apply when ultrasonic testing is performed in lieu of radiographic examination, when allowed by UW-51?
Reply: Yes.
Hope this helps.
To reinforce Mike’s comments see interpretation VIII-1-92-201:
Question: May pressure vessel materials be exempted from impact testing if all of the requirements of UG-20(f) in Section VIII, Division 1 are met, even though impact testing would be required under the provisions of Fig. UCS-66...
I don't know if such headers can be calculated per Section I.
Appendix 13 of VIII-1 has rules for circular headers, see Fig. 13-2(c). In any case the holes for tubes and plugs are multi-diameter holes, and because of that I don't think UG-53 would apply.
Regards.
