Practice Test Geeks(SPED) Society of Piping Engineers and Designers Certification Practice Test
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Pipe Fabrication & Welding Standards Flashcards

7 cards from real SPED practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Pipe Fabrication & Welding Standards flashcards as text

  1. Post-Weld Heat Treatment (PWHT) of carbon steel pipe per ASME B31.3 is mandatory when the nominal wall thickness exceeds:

    Answer: 0.750 inch (19.1 mm)

    ASME B31.3 Table 331.1.1 requires mandatory PWHT for P-No. 1 carbon steel when the nominal wall thickness exceeds 3/4 inch (19.1 mm) for normal fluid service.

  2. What is the primary reason for using a backing ring in a pipe butt weld?

    Answer: To support the root pass and ensure full penetration without burn-through

    A backing ring fits inside the pipe at the joint to support the molten weld pool during the root pass, ensuring full penetration and preventing burn-through.

  3. Which ultrasonic testing (UT) technique produces a cross-sectional image of a weld by scanning with a phased array probe?

    Answer: Phased Array Ultrasonic Testing (PAUT)

    PAUT uses an array of piezoelectric elements fired in sequence to electronically steer and focus the beam, producing a visual S-scan or E-scan image of the weld cross-section.

  4. In GTAW (TIG) welding of stainless steel pipe, why is argon purge gas applied to the pipe ID during root pass welding?

    Answer: To prevent oxidation (sugaring) on the weld root and maintain corrosion resistance

    Back purging with argon displaces oxygen from the weld root area, preventing chromium oxidation (sugaring) that would degrade corrosion resistance and create stress concentration points.

  5. What is the correct interpretation of a weld symbol with a circle at the junction of the reference line and arrow?

    Answer: Weld all around the joint (continuous weld)

    A circle at the reference line-arrow junction on a weld symbol indicates 'weld all around,' meaning the weld is to be continuous around the entire perimeter of the joint.

  6. Which document governs the fabrication and examination of welded pressure piping in the United States for process plants under ASME B31.3?

    Answer: ASME Section IX Welding and Brazing Qualifications

    ASME Section IX establishes the qualification requirements for welding procedures and welders used in the fabrication of pressure piping governed by B31.3.

  7. What is the maximum interpass temperature typically specified for welding austenitic stainless steel pipe to control sensitization?

    Answer: 350°F (177°C)

    Interpass temperature for austenitic stainless steel is typically limited to 350°F (177°C) to minimize time in the sensitization range (800–1500°F) that causes chromium carbide precipitation.