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In over 50 years I have never seen a stayed dished head. Even when there are rules does not mean it should be built.

Yes it is, provided all requirements of Section VIII are met. It is no longer a B16 flange.

Good Morning everyone, The 2019 is not mandatory until January 1, 2020,until then you can use either one.

Yes That is correct. Do you have a copy of the NBIC?

A NB "R" Stamp holder can perform the re-rating.In accordance with the rules in part 3. Just make sure that the certificate holder has experience with re-rating a Div 2 vessel.

The 5% adjustment has been removed from Section I and section VIII

I'm sorry the correct reference is paragraph 124.1.4

Take a look at FIG 100.1.2(B.1) The pic clearly shows that this Boiler external piping and is considered part of the Boiler. See also B 31.1 124.1. Because This is Code piping and should be repaired by a R stamp holder. What Jurisdiction are you in?

Good Morning, PG-52.3 was revised several years ago, it is now permitted to have the circumferential aligned holes govern the design. PG-52.3 has a formula to calculate the equivalent longitudinal efficiency of circumferential ligaments. I suggest that you review the current Section I.

In the late 1980's when I was working for HSB I also had to prove ASME equivalence for a vessels built in France. I made a presentation to the rules board and after much discussion they approved the installation and the State placed some "State Special Numbers" on them. Marty, and chicopee are...

I agree, but I don't think we have all the information, NDE etc and the program they are using may be applying a Ca where none exists.

I think it is a misunderstanding or unawareness of UG-16 (b)(4. The MINIMUM thickness is 3/32 regardless of what is calculated, .250" meets the Code.

I suggest you should take a look at UG-16 (b)(4). The minimum thickness required by Section VIII for compressed air service is 3/32" (2.5 mm). What if any RT of UT was preformed? Allan

Timsh, Have you asked your Inspector or the AIS? I'm sure that they can answer your question. Or, have you asked them and didn't like the answer? David has answered your question thoroughly. Accept it and move on. Allan

Section VIII Div 1 has an index I suggest that you use it.

You should review UG-28 of Section VIII Div 1. It has a step by step guide to determine MAWP.

XL83NL, You are correct it is the Manufacturer that applies the stamping after the Inspector has signed the ASME Data Report.

Good Morning, You can go to the ASME website and verify that that have a U2 Designator or request a copy of the Certificate from A or B. ASME issues the Certification Mark the manufacturer applies the Designator (U U2 S etc), this change occurred several years ago. Loyd's is a AIA and as such...

I'm not aware of any restriction against it as long as ALL of the requirements of SA-106 Gr B are met.

Crosby and David: There are a lot of Certificate holders that still do not understand the meaning of UW-11 (a)(5)(b). When I was a ASME Team Leader I had to educate many Certificate Holders on this subject.