PIPEFITTER Study Guide 2026
Everything you need to pass the PIPEFITTER exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 PIPEFITTER Exam Format at a Glance
📚 PIPEFITTER Topics to Study (157)
✍️ Sample PIPEFITTER Questions & Answers
1. What does 'IDLH' stand for in occupational safety, and what does it represent?
IDLH stands for Immediately Dangerous to Life or Health and represents exposure concentrations that pose immediate threats of death, serious injury, or impaired escape ability.
2. A welder needs to wrap a pipe with 2-inch-wide insulation tape at a 45° helix angle. If the pipe OD is 10 inches, how many linear inches of tape are needed per foot of pipe?
At 45° helix the pitch equals the tape width; inches of tape per foot ≈ (12/2) × π × 10 = 6 × 3.1416 × 10 ≈ 188.5 / wrap, requiring ≈ 53.41 in total per lineal foot given the helix geometry.
3. A rolling offset has a rise of 9 inches and a roll of 12 inches. What is the diagonal (true offset) before applying the 45° travel constant?
The diagonal of a rolling offset is found using the Pythagorean theorem on the rise and roll: √(9² + 12²) = √(81 + 144) = √225 = 15 inches. This diagonal is then treated as the 'rise' when calculating the travel using the 45° constant. Selecting 21 inches is a common error from adding the two values directly.
4. Which ASME standard governs the dimensional requirements for butt-welding fittings used in pipe fabrication?
ASME B16.9 covers factory-made wrought buttwelding fittings, specifying dimensions, tolerances, and ratings for elbows, tees, reducers, and caps.
5. What does a WPS (Welding Procedure Specification) document?
A WPS (Welding Procedure Specification) is a written document that specifies the welding variables (process, base metal, filler metal, position, preheat, PWHT, etc.) required to produce a sound weld meeting applicable code requirements.
6. Under ASME B31.3, after completing a piping system repair, the line must undergo a pressure test at what minimum percentage above the design pressure?
ASME B31.3 requires a hydrostatic leak test at 1.5 times (150%) the design pressure, but the standard hydrostatic test is 1.5×; however, the minimum pressure test factor commonly referenced for process piping is 1.5× design pressure.