Welding Code Standards & Inspection Flashcards

When qualifying a WPS by testing per ASME Section IX, a change from SMAW to GTAW process is considered a:

Answer: Essential variable requiring requalification

A change in welding process is an essential variable under ASME Section IX and requires re-qualification of the WPS.

A radiograph shows a series of rounded indications aligned along the weld centerline. This pattern most likely indicates:

Answer: Porosity — possibly piping or wormhole porosity

Aligned rounded indications along the centerline are characteristic of piping (wormhole) porosity trapped during solidification.

Under AWS D1.1, the minimum fillet weld size for a 3/4-inch base metal plate is:

Answer: 1/4 inch

AWS D1.1 Table 7.7 requires a minimum fillet weld size of 1/4 inch for base metal thickness from 1/2 inch up to 3/4 inch.

What does PWHT stand for, and what is its primary purpose?

Answer: Post-Weld Heat Treatment — to relieve residual stresses

PWHT (Post-Weld Heat Treatment) involves controlled heating and cooling of the welded assembly to reduce residual stresses and improve toughness.

Which weld symbol tail notation indicates that the weld must be made in the field (not in the shop)?

Answer: A filled (solid) circle at the arrow/reference line junction

A filled (solid) circle at the junction of the arrow and reference line is the field weld symbol per AWS A2.4.

What is the function of the 'Essential Variables' section in a Procedure Qualification Record (PQR)?

Answer: Document the actual welding parameters used during the test weld

The PQR documents the actual (as-used) parameters during qualification testing, providing the technical basis for the WPS.

AWS D1.1 requires that electrodes (SMAW) be stored in a rod oven at what minimum temperature after opening?

Answer: 250°F (121°C)

Low-hydrogen electrodes must be stored in a heated oven at a minimum of 250°F (121°C) after the original sealed container is opened.