Barlow & SDR
Pressure / wall / SDR from Barlow thin-wall relations.
Open →
Interactive engineering-reference calculators with formulas, assumptions, and project-review CTAs.
Each tool shows formula, units, assumptions, and validation. Coefficients are engineering inputs or reference defaults — never ALFA laboratory certificates unless a document says so.
Pressure / wall / SDR from Barlow thin-wall relations.
Open →Water distribution friction head loss (SI).
Open →Re-based friction loss with roughness & viscosity.
Open →Gravity full-pipe capacity.
Open →Laminar / transitional / turbulent check.
Open →Q + ID → V.
Open →V + ID → Q.
Open →Straight + fittings Le sum.
Open →Internal fill volume.
Open →Mass from user OD/wall/ID/density.
Open →Route length → stick count with allowance.
Open →Rectangular excavation L×W×D.
Open →Bedding prism volume.
Open →Trench minus pipe displacement.
Open →Educational PN × f_T bands.
Open →ΔL = α·L·ΔT.
Open →bar/psi/kPa, L/s↔m³/h, mm↔in.
Open →Design & selection tools → · Project tools → · Arabic mirrors →
This engineering resource explains ALFA Piping for designers and reviewers. Use it to clarify definitions, methods, and limitations—then apply project-specific data.
Related: products · applications · standards index.
Standard, size/pressure class, jointing system, quantities/lengths, fittings list, delivery location, and any submittal/test requirements from the specification.
Not without review. Dimensions, pressure classes, and test methods differ across standard families.
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).
Batch-2 knowledge update: ALFA-specific order data must come from approved submittals—this section does not invent ratings or certifications.