Integral flange 3

[LP2111]

i am new to asme..

1) In Pv-elite, bolted flange calculation they have shown a type of flange named Integral slip-on flange.
as this flange to shell joint would be fillet weld. now i have go through MA2 fig. 2-4 5/6/6a/6b/7 as example of integral flange those all having a butt-joit with the shell.
why pv-elite mentioned Integral before slip-on with fillet joint?
2) what is the difference between integral slip-on and loose slip-on? integral ring flange and loose ring flange?
3) can anyone make easy to interpret the defenition of integral, optional & loose type flange?

regards

 

[r6155]

I don't use PV Elite, but ASME is clear.
The term "integral" is used in various contexts other than flanges. Read again and try to understand the pictures.
You can also search for "integral flange" in the forum.

If you make a minimum effort you can gradually facilitate the interpretations

Regards

 

[MJCronin]

An Integral Flange which is also called Long weld neck flange (LWN flange), is used for high pressure situations, integral hub weld neck flanges are used and for very high pressure cases Long Welding Neck flanges are preferred.

https://thepipefitting.com/flange/i... which is,Welding Neck flanges are preferred.

C'mon R6155 ... a minimal effort ? .... You are expection an awful lot from newbie engineering students !!!

MJCronin
Sr. Process Engineer

 

[Geoff13]

The first sentence of 2-4(a), (b) and (c) each describe the difference between loose, integral and optional flanges. The basic difference is that an integral flange uses the neck for a portion of its strength and thus requires stronger connecting welds so they act together, whereas a loose flange carries all the load itself and thus requires minimal welds.

I will guess that an "integral slip-on" in PV Elite means a standard slip-on flange (i.e. B16.5 or B16.47) but with increased welding similar to Figure 2-4 Details 8a, 9a or 10a. Under optional design rules this can then be calculated as an integral flange.

 

[LP2111]

yes geoff13..i think i got the logic..
the integral slip-on(in pv-elite) is 8a,9a or 10a...when we consider optional flange as integral flange(note-6, fig.2-4)
so it is the g0 & g1 dimension that differ optional flange when considered as integral flange.
so all optional flanges can be consider as either loose type or integral type. that's why it is an "optional" i guess!!

 

[r6155]

Some clarifications
a) Welding neck flange and others also are used for high pressure – See ASME B16.5 i.e class 1500, 2500

b) Integral flange is full penetration weld or a forge in one piece (not weld).
In Mandatory App 2
Figure 5: forge,
Figure 6, 6a and 6b: full penetration butt weld
Figure 7: full penetration weld, not butt weld

c) Integral flanges (forge and butt weld) are used for: high / low temperature, nuclear, lethal, fatigue, ciclyc.......etc. Radiographic Test or UT is applied.

Optional flange calculated as integral is not used for the above mentioned service.

d)
Standard Designation: B16.5 Edition/Addenda: Para./Fig./Table No:
Subject Description: Long Welding Neck Flanges
Date Issued: 09/26/1983 Record Number:
Interpretation Number : 1-22 Question(s) and Reply(ies):
Question: Does B16.5 cover long welding neck flanges?
Reply: Long welding neck flanges are not covered in B16.5.

See ASME B16.5 2020 “Figure 4 Straight Hub Welding Flanges”.

Regards

 

[LP2111]

thanks r6155..it will be helpful!