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Technical Standards and Specifications Flashcards

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

Read the first 7 Technical Standards and Specifications flashcards as text

  1. What ASME standard specifically covers wrought steel butt-welding fittings such as elbows, tees, and reducers?

    Answer: ASME B16.9

    ASME B16.9 covers factory-made wrought buttwelding fittings in sizes NPS 1/2 through NPS 48, including elbows, tees, reducers, and caps.

  2. What is the primary purpose of a stress-isometric drawing in steamfitting?

    Answer: To illustrate pipe stress analysis results including support locations and expansion loops

    A stress isometric is used by piping stress engineers to document analysis results, showing support types, expansion provisions, and calculated stress levels along the pipe routing.

  3. According to OSHA 1910.147, what must be verified before performing maintenance on a steam piping system?

    Answer: That the system has been de-energized and locked out/tagged out

    OSHA 1910.147 (Control of Hazardous Energy) requires that all energy sources be isolated and locked out/tagged out before performing maintenance to prevent unexpected re-energization.

  4. What does 'PWHT' stand for in piping fabrication, and when is it typically required?

    Answer: Post Weld Heat Treatment — required for certain alloy steels and thick-walled carbon steel welds to relieve residual stresses

    PWHT (Post Weld Heat Treatment) is a controlled heating and cooling process applied after welding to relieve residual stresses and improve toughness, required by code for certain materials and wall thicknesses.

  5. Which type of pipe end preparation is required for a socket weld connection per ASME B16.11?

    Answer: Pipe inserted fully into socket then pulled back 1/16 inch before welding

    ASME B16.11 requires the pipe to be inserted fully into the socket and then pulled back approximately 1/16 inch to allow for thermal expansion during the welding process.

  6. Under ASME B31.1, what is the maximum branch connection size that can be made with a half-coupling without requiring a reinforcing pad?

    Answer: NPS 2 or less when branch-to-header ratio meets code limits

    ASME B31.1 allows unreinforced branch connections using listed fittings (including half-couplings) when the branch-to-run diameter ratio and design conditions meet the code's reinforcement area calculation requirements.

  7. What is the key distinction between ASME B31.1 (Power Piping) and ASME B31.3 (Process Piping) regarding scope?

    Answer: B31.1 covers steam/feedwater piping in power plants and district heating; B31.3 covers piping in petroleum refineries and chemical plants

    ASME B31.1 covers power plant piping (steam generators, turbines, heat exchangers) while B31.3 governs petroleum refinery, chemical plant, pharmaceutical, and similar process facility piping.