Some Acceptable Weld Joint as per IBR Regulations
Sr. No.
Type of Joint
IBR Regulation No.
Design Notes
Figure
1
Butt welded joint
125(a) Figure-4 & XII/4
Applicable plate thickness less than 20 mm
2
Butt welded joint
125(a) Figure-3
Applicable plate thickness less than 20 mm
3
Butt welded joint
XII/3
4
Butt welded joint
125(a) Figure-1 & XII/5
Applicable plate thickness above than 20 mm
5
Butt welded joint
125(a) Figure-2 & XII/6
Applicable plate thickness above than 20 mm
6
Shell to head butt join
Figure-44
Outside diameter match
7
Shell to head butt join
XII/1
Inside diameter match
8
Shell to head butt join
XII/8
Dished end thicker than shell.Either side Taper joint
9
Shell to head butt join
XII/10
Shell thicker than Dished end. Either side Taper acceptable
10
Nozzle pipe / Shell to WN Flange joint
28(ix)(a)
11
Nozzle pipe / Shell to WN Flange joint
28(ix)(b)
12
Nozzle pipe / Shell to WN Flange joint
28(ix)(c)
13
Nozzle to shell / Dished end joint-Without RF pad
365/29A XII/93
Set-on Nozzle
14
Nozzle to shell / Dished end joint Without RF pad
365/7
Set-in Nozzle (Single vee with Back gouge) Full Penetration
15
Nozzle to shell / Dished end joint Without RF pad
XII/85D (B)
Set-in Nozzle (Double vee) Full Penetration
16
Nozzle to shell / Dished end joint
XII/84(A)
Partial Penetration weld joint
17
Nozzle to shell / Dished end joint
XII/85(B)
Partial Penetration weld joint
18
Nozzle to shell / Dished end joint with RF Pad
XII/85F
Double vee Full Penetration
19
Nozzle to shell / Dished end joint with RF Pad
XII/87
Single vee Full Penetration
20
Tube to Tubesheet joint
XII/67
Seal weld with light expansion
21
Tube to Tubesheet joint
XII/67A
Strength weld with light expansion
22
Flange to shell joint
29
23
Flange to shell joint
30
24
Flange to shell joint
32
25
Flange to shell joint
31
26
Flange to shell joint
33
27
Flange to shell joint
33
