🔥 EPA 40 CFR 60.18 / API 521 (Flare Tip Velocity Mach 0.2-0.5, Flame Stability)

Refinery Flare Tip Velocity Calculator

Calculate exit velocity (Mach number), net heating value (NHV), and smokeless steam-assisted / air-assisted capacity for emergency refinery flare tips under EPA 40 CFR 60.18 & API 521: maintain maximum allowable exit velocity (<400 ft/sec or Mach 0.5 for high-BTU gases) to prevent flame blowout and ensure complete 98% combustion destruction.

1. Project & Operating Inputs

Emergency Relief Discharge (Lbs / Hr e.g. 150,000 Lbs/Hr Hydrocarbon Vapor)

Flare Tip Diameter (Inches e.g. 36.0" Sonic Steam-Assisted Tip)

Customer Bid Price for Supplied & Craned Inconel Flare Tip ($)

Inconel 625 Flare Tip, Pilots, High-Energy Electronic Igniter Skid ($)

2. Financial Breakdown & Yield

40 CFR 60.18 FLARE VELOCITY

Turnkey Flare Tip Replacement Profit

Combustion Equipment Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Direct Cost