Calculators hub
Barlow, HW, Darcy, Manning, flow, trench, weight, units.
Open →
Products
▾
DIN 8062 Metric Pressure Pipes
ASTM D1785 Sch 40 & 80 Pipes
ASTM D2241 SDR Series
BS 3505 Pressure Pipes
BS 3506 Pressure Pipes
CPVC Industrial Pipes (ASTM F441)
CPVC DIN 8079
DIN 19534 Gravity Sewer Pipes
DIN 19531 Building DWV Pipes
BS 5255 Waste Pipes
Perforated Drainage Pipes
Slotted Drainage Pipes
NEMA TC-2 Electrical Conduit
NEMA EPT
NEMA EPC-40
NEMA EPC-80
NEMA TC-6 Duct
NEMA TC-8 Duct
BS 6099 Conduit
HDPE Pipes
PPR Pipes
PVC / uPVC Fittings
PVC / CPVC Solvent Cement
All Products Catalogue →
Applications
▾
Industries
▾
Engineering
▾
About
▾
Saudi Coverage
▾
Home → Engineering
Engineering Resource Center
Design references, bilingual calculators, manufacturer documentation requests, and consultant/MAR support.
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.
ALFA AL-ARABIA Engineering Resource Center supports consultants, MEP/civil engineers, EPC contractors, and Saudi project teams with methodologies, calculators, and specification pathways. Vendor registration (Saudi Aramco Vendor #10116102) identifies ALFA as a registered vendor — it is not automatic product approval for every specification.
Engineering Toolkit
Structured pathways for calculation, sizing, material selection, installation earthworks, and consultant/project workflows.
Engineering Calculators
Project Estimators
Project tools
Material takeoff, RFQ, requirements, submittal checklist.
Open →Pipe quantity
Route → sticks with allowance.
Open →Hydraulic & Design Tools
Design tools hub
Size selector, hydraulic sizing, support spacing.
Open →Hydraulic sizing
Flow → velocity → Hazen–Williams.
Open →Material Selection
Application selector
Links to existing ALFA pages by duty.
Open →PVC vs HDPE
Explanatory questionnaire — no universal winner.
Open →Chemical review gate
Request ALFA review — no invented matrix.
Open →Installation Tools
Trench / bedding / backfill
Earthworks volume estimators.
Open →Installation & jointing
Handling and jointing methodology.
Open →Consultant & Project Tools
Consultant / MAR
Submittal pathway.
Open →Submittal builder
Printable checklist without fake certificates.
Open →Document requests
Honest AVAILABLE / REQUEST statuses.
Open →Resource map
Design & Calculations
Barlow/SDR, Hazen–Williams, Darcy–Weisbach, Manning, Reynolds, flow, volume, derating, expansion, units — EN + Arabic mirrors.
Open →Pipe Design
Pressure vs gravity selection, SDR/PN/Schedule concepts, temperature effects, material selection methodology.
Open →Underground Engineering
ASTM D2321-oriented trench, bedding, haunching, backfill, deflection concepts for flexible thermoplastics.
Open →Hydraulic Engineering
Distribution and gravity hydraulics methodology, velocity guidance, head loss workflows.
Open →Drainage & Sewer
DWV, gravity sewer, slope/self-cleansing concepts linked to DIN 19531 / 19534 / BS 5255 product families.
Open →CPVC Engineering
Hot-water and elevated-temperature design methodology, jointing considerations, derating workflow.
Open →Conduit & Duct
NEMA/BS conduit systems: installation concepts, bend/pull considerations — no invented fill tables.
Open →Perforated & Slotted
Subsoil drainage engineering concepts; perforated ≠ slotted; confirm ALFA patterns before specifying.
Open →Industrial & Process
Chemical/process service selection methodology. ALFA chemical matrices only when documented.
Open →Standards & Compliance
ASTM, DIN, BS, NEMA, ISO, SASO reference map — referenced ≠ certified ≠ manufactured-to.
Open →Technical Downloads
Honest document center: AVAILABLE / REQUEST statuses. Datasheets, certificates, CAD/BIM via request — no fake files.
Open →Consultant & MAR Center
MAR/submittal pathway, compliance checklist approach, engineering review request.
Open →BOQ & Specification
Specification writing guidance, BOQ upload, procurement checklist for thermoplastic piping.
Open →Installation & Jointing
Handling, cutting, solvent cement and elastomeric jointing as industry-reference procedures.
Open →Troubleshooting
Leakage, joints, deflection, hydraulics — safe diagnostic guidance.
Open →Engineering FAQs
Categorized answers for consultants and site engineers.
Open →Engineering Glossary
SDR, PN, Schedule, Manning n, Hazen C, SN, bedding, NEMA terms.
Open →Product Cross-Reference
Map ALFA product families to engineering pathways.
Open →Start with calculators
From engineering to products, docs & RFQ
Engineering pathways
Use calculators and topic hubs for preliminary understanding, then request manufacturer documents for submittals. Educational pages are not a substitute for project design responsibility.
Industrial inventory supporting engineering packages — confirm sizes and classes during enquiry.