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Important Facts: Quiz on ASME B31.3 Exclusions II 7 MCQs with Explanations

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ASME B31.3 Exclusions Quiz

1. Excluded Piping Systems: ASME B31.3 Exclusions

Which of the following is considered as ASME B31.3 Exclusions in temrs of scope regarding pressure and fluid criteria?





2. Excluded Equipment Piping

Which type of fluid handling or processing equipment piping is excluded from ASME B31.3?





3. Excluded Boiler Piping

Which code covers power boilers and their associated external boiler piping?





4. Excluded Piping within Fired Heater Enclosure

Which components located within a fired heater enclosure are excluded from ASME B31.3?





5. Excluded Temperature Range

What is the specified temperature range for low-pressure, non-hazardous piping systems to be excluded from ASME B31.3?





6. Excluded Fluid Criteria

What fluid criteria must be met for low-pressure, non-hazardous piping systems to be excluded from ASME B31.3?





7. Purpose of Exclusions

Why does ASME B31.3 exclude certain piping systems and equipment?





Short Article on ASME B31.3 Exclusions

ASME B31.3 Exclusions

ASME B31.3, the Process Piping Code, provides guidelines for the design, materials, fabrication, erection, inspection, and testing of piping systems in various process plants. However, the code’s scope excludes certain specific piping systems and equipment. These exclusions are as follows:

  1. Low-Pressure, Non-Hazardous Piping Systems: Piping systems with an internal gauge pressure at or above zero but less than 15 psi are excluded from ASME B31.3, provided that the fluid being transported is nonflammable, nontoxic, and not harmful to human tissue. Additionally, the design temperature of these piping systems must fall within the range of -20°F to 366°F.
  2. Power Boilers and Associated Piping: Power boilers designed in accordance with ASME Boiler and Pressure Vessel Code Section I, along with their external boiler piping that adheres to ASME B31.1, are not covered by ASME B31.3.
  3. Fired Heater Enclosure Piping: Tubes, tube headers, crossovers, and manifolds located within a fired heater enclosure are not within the scope of ASME B31.3.
  4. Fluid Handling and Processing Equipment Piping: Pressure vessels, heat exchangers, pumps, compressors, and other fluid-handling or processing equipment are excluded from ASME B31.3. This includes both the internal piping of these equipment pieces and the connections for external piping.

These exclusions are in place to ensure that ASME B31.3 focuses on the areas where its guidance is most relevant and to avoid overlap with other applicable codes and standards.

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