API 653 Chap 11 - Weldin

Question 1

welding operator are assigned what?

Answer 1

letter, number, or symbol identification

Question 2

welders identification mark should be ? (2)

Answer 2

1. hand or machine stamp within 3 ft of welds

2. a record that identifies the welder for each joint

Question 3

Is Impact testing need for the preheating method

Answer 3

No

Question 4

What are the preheat requirements?

Answer 4

1. limited to use on the P-1 materials
2. limited to SMAW, GMAW, FCAW, GTAW
3. weld area shall be preheated and maintain at a min. of 300F during welding up to 4” or 4t (great) is maintained.
4. Interpass temp cannot exceed 600F.

Question 5

Is Impact testing need for the controlled deposition welding method

Answer 5

yes

Question 6

what are the requirement of controlled deposition?

Answer 6

1. limited to P1, P3, and P4 material
2. limited to SMAW, GMAW, FCAW, GTAW
3. test material needed , and
4. cannot be lower strength or have a carbon content of more than 0.35%

Question 7

When impact tests are required by the construction code applicable to the work planned, the PQR shall include sufficient tests to determine …?

Answer 7

1. if the toughness of the weld metal and HAZ are adequate at the min design metal temp

Question 8

What should the WPS include?

Answer 8

1. supplementary essential variables
2. max weld heat input for each layer
3. min preheat temp
4. max interpass temp
5. preheat temp 4” or 4t (great) is maintain on each side
6. welding technique should be controlled depsoition, temper bead or half bead technique

Question 9

Welding processes (SMAW,GMAW,FCAW, GTAW) use only electrodes and fillers metals that are classified with?

Answer 9

optional supplemntal diffusible hydrogen designator of H8 or lower.

Question 10

When shielding gas are used, the gas shall exhibit a dew point….

Answer 10

that is no higher than -60F.

Question 11

Welds made by SMAW, after completion what should be done?

Answer 11

Not allow it to cool below min preheat temp, and raise to a temp of 500 +/- 50 F for a min of 2-4 hours to assist out gassing diffusion. (Hydrogen bake out treatment)

Question 12

When can hydrogen bake out treatment be omitted in SMAW?

Answer 12

if filler metal H4 is used.

Question 13

What should be done after the finish repair weld has cooled to ambient temp?

Answer 13

final temper bead reinforcement layer shall be remove and flush with the surface of the base metal.