API 510 API 510 Welding Procedures and Qualifications 1 — Questions and Answers
Question 1: According to API 510 and ASME Section IX, who is responsible for qualifying welding procedures used in pressure vessel repair?
- The owner/operator or their contractor (Correct answer)
- The insurance company
- The local jurisdiction authority
- The original equipment manufacturer
Correct answer: The owner/operator or their contractor
API 510 requires that the owner/operator or their authorized repair contractor qualify and certify all welding procedures per ASME Section IX.
Question 2: What document records the specific variables tested during welding procedure qualification per ASME Section IX?
- Procedure Qualification Record (PQR) (Correct answer)
- Welding Procedure Specification (WPS)
- Welder Performance Qualification (WPQ)
- Material Test Report (MTR)
Correct answer: Procedure Qualification Record (PQR)
The Procedure Qualification Record (PQR) documents the actual test variables and results used to support the Welding Procedure Specification.
Question 3: When a welder has not welded with a qualified process for more than 6 months, what is required per ASME Section IX?
- Requalification of the welder (Correct answer)
- A new WPS must be written
- A PQR must be rerun
- A radiographic examination of past welds
Correct answer: Requalification of the welder
ASME Section IX requires welder requalification if they have not welded in a qualifying process within the preceding 6-month period.
Question 4: Under API 510, which ASME standard governs the qualification of welding procedures and welders for pressure vessel repairs?
- ASME Section IX (Correct answer)
- ASME Section V
- ASME Section VIII Div. 1
- ASME B31.3
Correct answer: ASME Section IX
ASME Section IX — Welding, Brazing, and Fusing Qualifications — is the governing standard for procedure and welder qualification referenced by API 510.
Question 5: A welding procedure qualified using a P-1 base metal is generally acceptable for welding which other P-number groups?
- It depends on the essential variables specified in the WPS (Correct answer)
- All P-number groups without restriction
- Only P-1 materials
- Only P-1 and P-3 materials
Correct answer: It depends on the essential variables specified in the WPS
The applicability of a WPS to different P-number groups is governed by the essential variables listed in ASME Section IX, and qualification rules vary by process.
Question 6: In API 510 repair welding, preheat and interpass temperature requirements are primarily determined by which factor?
- Base metal chemistry and thickness (Correct answer)
- The type of welding rod only
- The ambient temperature at the job site
- Inspector preference
Correct answer: Base metal chemistry and thickness
Preheat and interpass temperature requirements are driven by the base metal's chemical composition and thickness to prevent hydrogen cracking and ensure proper metallurgical properties.
API 510 API 510 Welding Procedures and Qualifications 1
According to API 510 and ASME Section IX, who is responsible for qualifying welding procedures used in pressure vessel repair?