Canadian Entry To Practice (CETP) Practice Test

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What is the minimum wall thickness (schedule #) for vapor gas service when using steel or wrought iron pipe?

The correct answer is: 12

The minimum wall thickness for vapor gas service when using steel or wrought iron pipe is outlined in various industry standards, such as those set by the American National Standards Institute (ANSI) and other relevant codes. A wall thickness of schedule #12 is typically specified for these applications to ensure structural integrity and safety under varying pressures. Schedule #12 pipes provide a balance between strength and weight, making them sufficient for carrying vapor gases without risk of leakage or failure, while also being manageable in terms of installation and support requirements. This thickness takes into account the potential for corrosion, internal pressure variations, and other environmental factors that may affect the pipe's longevity and performance. Options with thicker wall schedules may offer greater durability but are not generally necessary for vapor gas service, leading to increased costs and weight without proportionate benefits. Conversely, options with thinner wall schedules would not have the required robustness to safely handle vapor gas applications, risking safety and compliance with established standards.