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…

**Learn more…**

**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!

**Learn more…**

- pipe data – ASTM, CSA
- ASTM Plastic Pipe Standards