Hazen Williams C: HDPE_SDR
Hazen-Williams roughness coefficients (C values) for pressure pipe hydraulic calculations. Covers new and aged pipe materials: ductile iron (cement-lined/unlined), cast iron at 0/5/10/20/30/40 years, carbon steel (new/corroded/lined), copper, brass, PVC, HDPE, CPVC, FRP, concrete, asbestos cement, galvanized steel, stainless steel, lead, vitrified clay. Includes AWWA M31 and NFPA 13 design C values. C value ranges (min/typical/max) and recommended design values are provided.
| pipe material | pipe condition | c value max (dimensionless) | c value min (dimensionless) | c value typical (dimensionless) | design c value (dimensionless) | notes |
|---|---|---|---|---|---|---|
| HDPE_SDR | aged | 155 | 140 | 148 | 148 | HDPE essentially immune to tuberculation; biological film possible in wastewater; design as 150 for clean water |
| HDPE_SDR | new | 155 | 145 | 150 | 150 | HDPE smooth bore; PE4710/PE3408 standard; no corrosion; slight sag in curves over time; ASTM D3035/F714 |
This is a sample. Search the full hazen williams c dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE