# pipes, liquid, flow

Flow

Pipe

• Design Challenge statement

Questions correspond to the steps in the [/Engineering%20Design%20Process Engineering Design Process].

• Ask (What? Ask questions, understand the need, identify the problem, define)
• Imagine (So what? Imagine, brainstorm, explore, discover)
• Plan (Now what? Plan, design)
• Create (Do it. Create, try it out)
• Improve (If this then what? Improve, make it better)

Explore basic area and volume calculations, density of different liquids, safe operating pressures, types of materials used for handling different products.

Engineering vocabulary, concepts

• flow, diameter, cross-section, ratio, error

Show and Tell
Now it is your turn. Here are some challenges for you to work on…

Liquids and pipes – sample calculations

You have two pieces of pipe. Pipe “A” is 12 inches in inside diameter (I.D.). Pipe “B” is 1 inch in inside diameter (I.D.). Both pipes are 100 feet long and filled with water.

• a) What is the ratio of the cross-sectional areas of “A” and “B”. (calculate cross-sectional areas and ratio them)
• b) What volume of water does each pipe hold. (multiply cross-sectional area by the length, adjusting for units)
• c) What is the weight of the water in each pipe. (weight of water per unit volume times volume)
• d) What would be the weight of gasoline in each pipe. (weight of gasoline per unit volume times volume)
• e) Select a type of pipe and state the maximum safe operating pressure. (ASTM, CSA, or other source of pipe data)
• f) You want to transfer water for use by people – what is this type of water called? (potable water)
• g) Select a suitable type of pipe for transferring water per question (f) – above.
• h) Bonus question – what is the total weight of the pipe and liquid in c and d
• Show all calculations, all references for data used in the calculations, and links to these data.

Engineering vocabulary, concepts

• basic area and volume calculations, density of different liquids, safe operating pressures, types of materials used for handling different products, cross-sectional areas, potable water, inside diameter

Show and Tell
Why would you need to solve a problem like this and do the calculation? What’s the story, real world example?

• Use web search to find similar problems
• Provide the material types and weights or links to same so that the correct answers would all be the same numbers!