Pipe vs Tube Quiz 1. What is the main dimensional difference between a pipe and a tube? Choose the correct answer: A) Pipe is measured by outer diameter (OD) and wall thickness (WT) B) Tube is designated by nominal pipe size (NPS) and wall thickness (WT) C) Pipe is designated by nominal pipe size (NPS) while tube is measured by OD and WT D) Pipe and tube are measured in the same way Show Answer Incorrect. The correct answer is C) Pipe is designated by nominal pipe size (NPS) while tube is measured by OD and WT. This is because the nominal pipe size does not match the true diameter of the pipe, while tube dimensions represent the true values. 2. Which of the following is a common usage difference between pipes and tubes? Choose the correct answer: A) Pipes are used for structural applications while tubes are used for fluid transport B) Tubes are used for instrumentation systems, while pipes are used for fluid and gas transport C) Pipes and tubes have no specific usage difference D) Pipes are used for decorative purposes while tubes are for conveyance Show Answer Correct! The correct answer is B) Tubes are used for instrumentation systems, while pipes are used for fluid and gas transport. This distinction arises due to the different tolerances and strength requirements in the design of tubes versus pipes. 3. Which of the following statements best describes the key dimensional parameter for a pipe? Choose the correct answer: A) Outside diameter (OD) is the most critical dimension B) Wall thickness (WT) is the most critical dimension C) Inside diameter (ID) is the most critical dimension D) Both OD and WT are important as OD minus 2 times WT determines the ID, which affects capacity Show Answer Correct! The correct answer is D) Both OD and WT are important as OD minus 2 times WT determines the ID, which affects capacity. In piping applications, understanding the inside diameter is crucial for determining flow capacity. 4. What is the main factor affecting the market price difference between steel pipes and steel tubes? Choose the correct answer: A) Tubes have stricter tolerances and require more inspections B) Tubes use more material per unit length C) Pipes have stricter tolerances and require more inspections D) Pipes use more material per unit length Show Answer Correct! The correct answer is A) Tubes have stricter tolerances and require more inspections. This leads to a higher market price for tubes compared to pipes, as more labor and resources are involved in the production process. 5. What is a typical shape difference between a pipe and a tube? Choose the correct answer: A) Pipes are always round, while tubes can be round, rectangular, square, or oval B) Tubes are always round, while pipes can be round, rectangular, square, or oval C) Pipes and tubes are only round D) Pipes and tubes can be any shape Show Answer Correct! The correct answer is A) Pipes are always round, while tubes can be round, rectangular, square, or oval. This is one of the key differences in their applications and usage.
