Flares for Petrochemical Plants
Elevated, enclosed and assisted flares for petrochemical plants, from routine flaring to emergency relief.
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Every flaring duty in a petrochemical complex
CRA supplies elevated, enclosed and assisted flares for petrochemical plants, matched to each flaring duty from emergency relief to routine purges, with smokeless burning of heavy olefins.
Destruction efficiency
>98%
Flare types
Elevated, enclosed, assisted
Pilot
Automated
Standard
API 537
How is a petrochemical flare system arranged?
A petrochemical plant's relief valves, vents and purges feed one or more flare headers. Low, routine flows can be burned in an enclosed ground flare, out of sight. When a large relief event exceeds its capacity, the flow passes to an elevated flare that can take the full emergency load. Steam or air assist at the tips keeps heavy gas burning without smoke.
How it works
Each flare connects to its header through a knockout drum and a water seal.
Relief valves, vents and purges send gas into the flare header.
The knockout drum separates liquids from the gas.
Routine flows go to the enclosed flare and large relief flows to the elevated flare.
Steam or air assist keeps heavy gas burning cleanly.
Automated pilots keep every flare ready for the next event.
Key Benefits
Elevated, enclosed, steam assisted and air assisted flares come from one supplier.
Steam or air assist keeps heavy olefin streams burning without smoke.
Each flare is designed to destroy more than 98% of the hydrocarbons it burns.
Enclosed ground flares hide routine and low-flow flaring.
CRA designs and builds the flare system in line with API 537.
Projects That Push Boundaries
Handles purge-only to full emergency relief at 358 t/h with minimised purge gas consumption.
Smokeless performance CFD-validated, with built-in ignition redundancy for uninterrupted field operation.
The CRA Edge
CRA has more than 30 years of experience in gas handling and flare engineering.
Design, R&D and manufacturing are carried out under one roof.
ISO 9001 certified through TÜV NORD, with designs aligned with ASME, API and CE.
Designs are customised to the process needs and the regulations that apply at site.
Applications
Built to help you specify.
Sizing tools, decision guides, and technical references. Use them before, during, and after your evaluation.
Frequently Asked Questions
Which flare does a petrochemical plant need?
Large relief loads usually go to an elevated flare. Routine and low flows can go to an enclosed ground flare. Many complexes use both, staged together.
How are olefin streams kept smokeless?
Heavy olefins need steam or air assist at the flare tip to mix in enough air for smokeless burning.
Can an enclosed flare and an elevated flare work together?
Yes. A staged system sends low flows to the enclosed flare and large relief flows to the elevated flare.
What data does CRA need to size a petrochemical plant flare?
CRA needs the flaring cases with their flows and compositions, the steam or power available, and the site layout and conditions.
Does CRA supply the full flare system?
Yes. CRA supplies flares with knockout drums, water seals, pilots, ignition and burner management systems.