Hazen Williams C
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.
Attributes
c_value_mindimensionless
c_value_typicaldimensionless
c_value_maxdimensionless
design_c_valuedimensionless
notes
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ductile_iron_cement_lined3 rowsductile_iron_unlined3 rowscast_iron_unlined3 rowscast_iron_cement_lined2 rowscarbon_steel_new1 rowcarbon_steel_corroded_mild1 rowcarbon_steel_corroded_heavy1 rowcarbon_steel_coal_tar_lined1 rowcopper_tube2 rowsbrass_pipe1 rowPVC_schedule2 rowsHDPE_SDR2 rowsCPVC_pipe1 rowFRP_fiberglass1 rowconcrete_cylinder_pipe2 rowsconcrete_noncylinder1 rowasbestos_cement2 rowsgalvanized_steel2 rowsstainless_steel_304_3162 rowslead_pipe1 rowvitrified_clay1 rowfire_hose_rubber_lined1 rowdesign_AWWA_new_main1 rowdesign_AWWA_existing_system1 rowdesign_NFPA13_sprinkler1 rowdesign_fire_protection_steel1 row
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