UCS - IMPACT TESTING REQUIREMENTS
MATERIAL
SA-516 Gr 70
SA-106 Gr B
SA-53
SA-36
START: Assume all part UCS base metal haz
require impact testing unless otherwise exempted.
Is the governing thickness > 4"
(UCS-66(a)(1)(5))
No
DT < -155 F
[UCS-66(d)]
P
1
1
1
1
GR
2
1
1
1
Sí
Impact test of base metal and
HAZ IS required as per
UG-84
Sí
UG-20(f)
Satisfy all the below conditions:
1. -20 F <= DT <= 650 F
2. Material is P No 1, Gr 1 or 2
3. Hydrotest as per UG-99(b) or UG-99(c) or 27-4 or 35-6
4. No thermal nor mechanical shock loadings
5. No Cyclic loads
No
Base metal and
HAZ impact
testing is NOT
required
Sí
Material then has to
be curve B, C, or D
No
Is material Curve A?
SEE FIGURE UCS-66
NO
Sí
Sí
Is governing
thickness<= 1"
UG-(f)(1)(b)
Is governing
thickness <= 1/2"
UG-(f)(1)(a)
No
Sí
Sí
No
DT is < MDMT shown in
Figure UCS-66
UCS-66(a)
Sí
DT < than MDMT with credit
of coicindent ratio
UCS-66(b)
Sí
No
No
DT < than MDMT
including credit for additional
PWHT when no required (-30 F)
UCS-68(c)
Base metal and HAZ impact testing is NOT
required
No
CURVE
B
B
B
A