What’s on the Pipe Head Loss poster
The rule, 3 worked examples, and the mistake everyone makes.
- Friction loss in a pipe grows with the square of velocity and with length over diameter.
- hf = f (L ÷ D)(V² ÷ 2g) · fittings: hL = K V² ÷ 2g
- Double the flow rate = About four times the loss
- f = 0.02, L ÷ D = 500 = hf = 10 velocity heads
- One 90 degree elbow = K is about 0.3
- Common mistake: Ignoring fittings on a short run → Always add the minor losses
The friction factor comes from Reynolds number and relative roughness. Roughness rises with age and scale.
Questions about the Pipe Head Loss poster
- What’s on the Pipe Head Loss poster?
- The rule, 3 worked examples, and the mistake everyone makes. Friction loss in a pipe grows with the square of velocity and with length over diameter.; hf = f (L ÷ D)(V² ÷ 2g) · fittings: hL = K V² ÷ 2g; Double the flow rate = About four times the loss; f = 0.02, L ÷ D = 500 = hf = 10 velocity heads; One 90 degree elbow = K is about 0.3; Common mistake: Ignoring fittings on a short run → Always add the minor losses. The friction factor comes from Reynolds number and relative roughness. Roughness rises with age and scale.
- Who is the Pipe Head Loss poster for?
- Pipe Head Loss belongs to the Mechanical Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning thermofluids can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Pipe Head Loss poster?
- Sizing pipework or a pump, where the friction loss sets the duty point. A wall chart earns its place by being glanceable from where the work is happening, so Pipe Head Loss belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
- What other posters go with Pipe Head Loss?
- Bernoulli's Equation, Continuity and Drag & Lift sit alongside Pipe Head Loss in the Mechanical Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Bernoulli's EquationContinuityDrag & Lift
- Is the Pipe Head Loss poster free to download and print?
- Yes. Pipe Head Loss downloads as a free PDF with no account, no email and no watermark, like everything else in the Mechanical Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Pipe Head Loss poster print at?
- Pipe Head Loss is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Pipe Head Loss loses nothing.Printing guide
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