Reference table

Fire Sprinkler K-Factor Table

Name: Fire Sprinkler K-Factor Table
Keywords: sprinkler K-factor table

Reference common sprinkler K-factor values used for quick flow and pressure checks in NFPA 13 style sprinkler calculations.

sprinkler K-factor table9 rows2 linked calculators

Rows

Reference values

Columns

Lookup fields

Linked tools

Calculators using this data

Source governance

Record how this table is used before carrying a value into a calculator, worksheet, or authority workflow.

Governance item	Record	Use boundary
Source class	Engineering lookup table	Use the table as a controlled reference input, not as an adoption or approval database.
Last review basis	Static registry review	Re-check adopted standards, manufacturer data, and project criteria before final use.
Known limit	Manufacturer data, adopted edition, and project specifications can supersede a generic reference row.	Escalate unresolved code, listing, or jurisdiction questions to the project record.
Downstream record	Sprinkler K-Factor Flow and Pressure Calculator, Sprinkler System Demand Calculator, NFPA 13 Hydraulic Design Worksheet, Hazard Classification and Density Setup Worksheet	Keep selected rows with the worksheet, calculation package, or authority record.

Reference table use

Use the table as controlled input data: select the row, verify the condition, and carry the value to the related calculator.

Usage context

1Use this table when selecting sprinkler k-factor table for preliminary fire protection calculator setup.
2Treat the lookup value as an engineering input that must be traceable to project conditions, manufacturer data, or adopted standard criteria.
3Apply the selected value before using 2 linked calculator workflows that depend on this reference.

Selection rules

1Match the row against the actual project condition before selecting a K-Factor / Typical Use / Numeric K value.
2Do not interpolate, round, or substitute a value unless the project calculation basis explicitly allows it.
3When multiple rows appear plausible, choose the conservative value and document the reason for the selection.

Review checks

1Selected row matches drawings, device listings, field readings, or occupancy assumptions.
2The selected value is carried into the downstream calculator with the correct units and label.
3The result is reviewed against 2 linked calculator uses before final design reliance.

Reference field	How to use it	Related tools
K-Factor	Use this field to identify the matching project condition.	Sprinkler K-Factor Flow and Pressure Calculator, Sprinkler System Demand Calculator, NFPA 13 Hydraulic Design Worksheet
Typical Use	Carry this value into the downstream calculator with the displayed units and label.	Sprinkler K-Factor Flow and Pressure Calculator, Sprinkler System Demand Calculator, NFPA 13 Hydraulic Design Worksheet
Numeric K	Carry this value into the downstream calculator with the displayed units and label.	Sprinkler K-Factor Flow and Pressure Calculator, Sprinkler System Demand Calculator, NFPA 13 Hydraulic Design Worksheet

Standard K-Factors

K-Factor	Typical Use	Numeric K
K2.8	Small orifice	2.8
K5.6	Standard spray	5.6
K8.0	Large orifice	8
K11.2	Extended coverage	11.2
K14.0	ESFR / storage	14
K16.8	Large drop / storage	16.8
K22.4	High-flow storage	22.4
K25.2	High-flow storage	25.2
K28.0	High-flow storage	28

Engineering disclaimer

NFPA in USA provides engineering workpapers, calculation checks, and reference tables for project screening and coordination. Final design decisions, code interpretations, submittals, and acceptance records must be completed by qualified professionals and verified against the adopted code, project criteria, listings, and Authority Having Jurisdiction requirements. This site does not issue signed or sealed engineering documents.

Tools and workflows that use this table

Sprinkler K-Factor Flow and Pressure Calculator Sprinkler System Demand Calculator NFPA 13 Hydraulic Design Worksheet Hazard Classification and Density Setup Worksheet

FAQ

How should this K-factor table be used?+

Use it as an engineering reference source for selecting values, checking assumptions, and documenting the basis carried into a calculator or worksheet.

Can this table replace the sealed project record?+

No. Values still need to be checked against the adopted standard, manufacturer data, project specifications, and Authority Having Jurisdiction requirements before they are used in final documents.