Flare Stack Drone Inspection Singapore — Inspecting Flare Tips Without Shutdown

What Is Flare Stack Drone Inspection?

A flare stack is the tall, elevated structure at a refinery or petrochemical plant that safely burns off surplus and waste gases, protecting the plant from over-pressure during upsets, start-ups and shutdowns. It is one of the hardest assets in the whole facility to inspect: it stands at the top of a slender riser dozens of metres above the ground, it runs continuously, and its business end — the flare tip — sits inside a plume of intense radiant heat. Flare stack drone inspection is the systematic survey of that structure using an aerial drone carrying high-resolution visual and thermal cameras.

A complete inspection covers the whole asset. At the top is the flare tip — the burner, the pilots and their ignition system, the wind shield and flame-retention devices — the components that actually deliver a clean, stable flame. Below it run the riser and stack shell, the internal refractory lining, the external coating and corrosion protection, and the supporting structure, ladders and access platforms. Each of these degrades in its own way and each carries its own consequence if it fails, which is why the flare needs a purpose-built inspection rather than a general visual check from the ground.

The Problem: A Flare Is Tall, Hot and Never Stops

Traditionally, inspecting a flare well meant one of two unattractive options. The first was to shut the flare down — a major operational event that often ties into a wider plant outage, is expensive, and takes the plant's primary pressure-relief safeguard offline while the work is carried out. The second was a risky manned survey by helicopter or by rope-access technicians climbing the riser, both of which put people into the radiant-heat zone at the very top of a live installation.

Because neither option is quick or cheap, flare inspection has historically been rare and reactive. Operators tended to wait for a scheduled turnaround or for a visible symptom — a leaning flame, a smoking tip, a dropped pilot — before looking closely. By then, tip erosion or refractory loss may already be well advanced. The result is a critical safety asset that is inspected far less often than its importance warrants, simply because the act of inspecting it was so disruptive.

The Drone Advantage: Inspecting a Live Flare

The headline capability of drone flare inspection is simple and decisive: a drone can inspect a live, operating flare tip and stack while it continues to burn. Flying from a safe standoff distance, outside the flame envelope and the radiant-heat zone, the drone uses optical and thermal zoom to resolve fine detail on the tip and riser without ever approaching them closely. It captures the condition of tip erosion, burner and pilot state, cracking, corrosion and structural damage — all with the flare in service.

This changes the economics and the frequency of flare inspection entirely. A survey that once demanded a shutdown or a helicopter becomes a routine, safe, no-downtime task that can be repeated as often as the operator wants. Personnel stay on the ground; the plant keeps running; the flare keeps protecting the facility. What was a rare, disruptive event becomes ordinary condition monitoring — and that shift is what lets operators catch deterioration early instead of reacting to failure.

• No shutdown — routine tip and stack condition monitoring with the flare fully in service and the plant producing.
• No people at height — no rope access, no helicopter, no exposure to radiant heat at the top of the riser.
• Complete coverage — the full circumference of the tip and riser is imaged, not just the faces a climber can reach on one descent.
• Visual plus thermal — radiometric thermal imaging reveals hot spots and burn patterns the eye cannot judge from the ground.

Flare Defects We Detect

Our inspections are structured around the specific ways a flare deteriorates. Each finding is identified, imaged, located to the tip or a riser elevation, and compiled into a package your engineers can act on and use for flare-tip replacement planning.

How the Inspection Works

An inspection begins with planning around the hazards that make a flare unique. We assess wind direction, the heat plume and radiant flux, and set standoff distances and flight paths that keep the drone well clear of the flame and thermal envelope at all times. From those safe positions, high-resolution visual capture resolves fine surface detail on the tip and riser — erosion, cracking, corrosion, coating loss and pilot condition — while radiometric thermal imaging maps hot spots, refractory breakdown and abnormal burn patterns in the same sortie.

The work fits two clear windows. For routine live-flare condition monitoring, the drone surveys the operating tip and stack as often as the operator wishes, building a time series that tracks tip erosion between overhauls. For a detailed survey during a turnaround, when the flare is down and cool, the drone carries out a close, comprehensive inspection of the tip internals, refractory and full structure. Together these support proactive flare-tip replacement planning — ordering and scheduling a new tip on evidence rather than after a failure. Flare inspection is read against the relevant industry codes, including API 510 for pressure vessels, API 574 for piping components, API 537 covering flare details and performance, and the applicable ASME requirements.

What We Inspect

Every flare is inspected as a complete system, from the burner at the crown down to the base of the structure.

Why Choose SG Drone Inspections

We are a specialist industrial drone inspection provider in Singapore, experienced in surveying live, high-hazard assets at refineries and petrochemical plants.

Frequently Asked Questions