12.3 ASME VIII section UCS-66: impact test exemption familiarization questions Q1. ASME VIII section UCS-66 A stationary vessel is made from 3 in thick SA516 GR70 plate that has been normalized. The MDMT is 30 8F at 500 psig. Does this material require impact testing? (a) No & (b) Yes & (c) Only if the vessel ID is less than 36 in & (d) Only if the vessel ID is greater than 36 in & Q2. ASME VIII section UCS-66 A vessel constructed of ‘curve B’ material is to be patch-plated with a fillet welded patch of the same material as the shell. The stress ratio is calculated as 0.64. The patch and vessel are 0.622 in thick with zero corrosion allowance. The MDMT is 15 8F. From the information given, does the repair require impact testing of the repair procedure? (a) Yes & (b) No & (c) Yes, if optional PWHT is done & (d) There is insufficient information in the question to decide & Q3. ASME VIII section UCS-66 A 1.125 in thick lap-welded patch is of SA-515 Gr 70 P1 material. The vessel nameplate shows MDMT as 50 8F ‘HT’, denoting that the patch has been voluntarily heat-treated. The stress ratio is 1. From the information given, does the repair require impact testing of the repair procedure? (a) Yes & (b) No & (c) Only if the optional PWHT is actually done & (d) There is insufficient information in the question to decide & Impact Testing 211
12.3 ASME VIII section UCS-66: impact testexemption
familiarization questions
Q1. ASME VIII section UCS-66A stationary vessel is made from 3
in thick SA516 GR70 platethat has been normalized. The MDMT is 30
8F at 500 psig. Doesthis material require impact testing?
(a) No &(b) Yes &(c) Only if the vessel ID is less than
36 in &(d) Only if the vessel ID is greater than 36 in
&
Q2. ASME VIII section UCS-66A vessel constructed of curve B
material is to be patch-platedwith a llet welded patch of the same
material as the shell. Thestress ratio is calculated as 0.64. The
patch and vessel are 0.622 inthick with zero corrosion allowance.
The MDMT is 15 8F.From the information given, does the repair
require impacttesting of the repair procedure?
(a) Yes &(b) No &(c) Yes, if optional PWHT is done
&(d) There is insufcient information in the question to
decide &
Q3. ASME VIII section UCS-66A 1.125 in thick lap-welded patch is
of SA-515 Gr 70 P1material. The vessel nameplate shows MDMT as 50
8F HT,denoting that the patch has been voluntarily heat-treated.
Thestress ratio is 1. From the information given, does the
repairrequire impact testing of the repair procedure?
(a) Yes &(b) No &(c) Only if the optional PWHT is
actually done &(d) There is insufcient information in the
question to
