ASME VIII-1: Self-Reinforced Nozzle tapering angle and name plate for U Stamp

[FPPE]

Hi, I was reading UG36/37/40/41 and UW-9 (Figure UW-9-2) in order to find some information regarding the range that the angle alpha could assume, but I didn't find any explanation.

Second, we should stamp an ASME U-1 heat exchanger.
Should we use the template shown in Figure UG-118 for each side, then stamping two nameplates?

Thank you in advance.

 

[Cobra17]

Angle alpha interpretation:

Standard Designation: BPV Section VIII Div 1
Edition/Addenda: 2013
Para./Fig./Table No: UW-9
Subject Description: Section VIII, Division 1; UW-9(c) - Change in Wall Thickness
Date Issued: 03/24/2016
Record Number: 16-464
Interpretation Number : BPV VIII-1-16-25
Question(s) and Reply(ies):
Question: Does UW-9(c) require a 3:1 taper when there is a change in wall thickness within a shell course or spherical shell even when that change in thickness is away from a welded joint?

Reply: Yes, see UG-27(g).

, but since you are looking specifically at UW-9-2:

Standard Designation: BPV Section VIII Div 1
Edition/Addenda:
Para./Fig./Table No:
Subject Description: UW-9(c) and Fig. UW-16.1(g) (2007 Edition, 2009 Addenda)
Date Issued: 11/23/2010
Record Number: 10-749
Interpretation Number : VIII-1-10-31
Question(s) and Reply(ies):

Question (1): For a vessel constructed in accordance with Section VIII, Division 1, is it permissible to weld a welding neck flange (that is included within the scope of the Code) to the neck of an integrally reinforced nozzle similar to that depicted by Fig. UW-16.1(g)?

Reply (1): Yes.

Question (2): If the reply to question (1) is "yes," do the requirements of Fig. UW-13.4 apply to the transition between the nozzle neck and flange?

Reply (2): No. See UW-9(c).

also see Figure UW-16.1(g)

for the heat exchanger question:

Google heat exchanger nameplates and look at some of the images. The nameplates have a shell side and tube side so both conditions can be added to the nameplate

 

[Krausen]

For your nameplate, note that UG-116 was significantly revised in VIII-1 2019 for required markings/info on it.

If this is a S&T Exchanger under API660, note that you shall have one nameplate with all required markings for both shellside & tubeside that is attached to the shell, near the channel end (API660, 10.3). If shell will be insulated, the nameplate shall remain visible after insulation is installed.

 

[IdanPV]

Hello,

Take a look in ASME PTB-4, there is a very good example of how the nameplate of a S&T HX shall look like.

 

[FPPE]

Thank you all!