Pipe Size Selector

Engineering reference Project verification required

Engineering disclaimer: Calculators and methods on this page are engineering references for education and preliminary design discussion. They are not a substitute for project specifications, PE-stamped calculations, or ALFA confirmation of product ratings for your service conditions. Project-specific verification required.

Theoretical inside diameter plus common metric candidates in a guidance velocity band. Not an ALFA product list.

A = Q/V | D = √(4A/π)

Flow Q (L/s)

Target velocity (m/s)

What it calculates

Derives theoretical ID and lists common metric candidates in a velocity band.

Formula / method

D = √(4Q / (π V))

Assumptions

Steady flow; user target velocity; educational candidate diameters.

Interpretation

Shortlist candidates, then confirm actual ID after wall/SDR selection.

Limitations

Not an ALFA catalogue. Does not solve head loss or PN.

Related tool chain

Hydraulic sizing Hazen–Williams

Related products

DIN 8062 pressure pipe

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Direct technical answer: Pipe Size Selector

This engineering resource explains Pipe Size Selector for designers and reviewers. Use it to clarify definitions, methods, and limitations—then apply project-specific data.

Using this tool correctly

Confirm input units (mm vs in, m vs ft, bar vs psi) before calculating
State assumptions (roughness/C-factor, temperature, fluid density) in your design note
Treat outputs as decision support—validate against the project standard and safety factors
General examples are not ALFA product certificates

Related: products · applications · standards index.

Frequently asked questions

What information is needed to quote Pipe Size Selector?

Standard, size/pressure class, jointing system, quantities/lengths, fittings list, delivery location, and any submittal/test requirements from the specification.

Can I substitute one pipe standard for another at the same nominal size?

Not without review. Dimensions, pressure classes, and test methods differ across standard families.

How do I contact ALFA for supply?

Use the RFQ form or contact +966 50 183 5126 / sales@alfaalarabia.co. Manufacturing is based at 3rd Industrial City, Jeddah, Kingdom of Saudi Arabia (Aramco Vendor #10116102).

Related resources

Batch-1 knowledge update: ALFA-specific order data must come from approved submittals—this section does not invent ratings or certifications.

Pipe Size Selector