A landfill gas flare service agreement should state what is inspected and maintained, what counts as an urgent fault, how fast the engineer responds, and what happens if parts are not available. When a landfill operator asked for a service agreement covering its flare stacks, the draft was reviewed clause by clause. The points that came out of that review form a useful checklist for any operator drafting one.

The challenge: a flare is safety equipment that has to be kept working

A landfill gas flare destroys gas that would otherwise vent to the atmosphere, so a failed flare is both a safety problem and a compliance problem. Operators often rely on a supplier or a contractor to keep flares serviced. The risk is that the agreement is vague about scope, response times and costs, and that the first fault exposes the gaps.

The approach: scope the services, define the equipment

Mechanical maintenance

The draft listed these mechanical services:

• Inspection and testing of valves, pipework and fittings for corrosion or fouling, including flame arresters and UV sensors.
• Lubrication of bearings, gears and actuators.
• Adjustment and alignment where necessary and practical.
• Replacement of worn parts such as seals, gaskets and belts, following the manufacturer’s recommendations.
• Cleaning and clearing debris.
• Testing and calibration of pressure relief valves and other safety devices.
• Inspection of the flare stack structure, including guy wires and supports.

Electrical maintenance

• Inspection and testing of control panels, wiring and terminations.
• Adjustment of sensors, transmitters and instruments, with recommendations for analyser calibration.
• Testing of emergency shutdown systems and alarms.
• Inspection of earthing and lightning protection.
• Replacement of faulty or outdated components such as relays, switches and fuses.
• Where fitted, testing of uninterruptible power supplies and standby generators.

Define the equipment covered

The agreement set out the typical components of an elevated or enclosed flare, so there was no argument later about what was in scope:

• The stack: either an elevated stack, or an enclosed stack with a shroud that hides the flame and reduces noise and light.
• The burner assembly: flare tip, pilot burner and ignition system.
• The gas train: pipework, flow control valve, flame arrester, and pressure and temperature instruments.
• The knockout drum that removes moisture and particles.
• The blower or compressor.
• The control system: panel, PLC and HMI.
• Utility connections (electrical supply and instrument air), structural components such as platforms and ladders, and safety systems (flame detection, gas detection and emergency shutdown valves).

Each component’s maintenance schedule was to be agreed with the client and recorded on a service report form.

Why it works: fault classes and response times

The central idea was to classify faults by their effect on safety, environmental compliance and performance, and tie response times to the class.

The class is decided by the service provider in consultation with the client. A clear classification means a flare that will not light gets attention first and a scuffed panel does not.

Points raised in review

The review of the draft identified gaps that apply to almost any service agreement:

• Response time versus deployment time. Acknowledging a request, arriving on site and completing a repair are three different things. State each.
• Parts availability. What happens if a part is unavailable and the repair runs past the stated time?
• Communication. Use a standard template for service requests, set an acknowledgement time, and define how repair progress is reported.
• Cost structure. Whether the cost of setting up the service (vehicle, tools, engineer) is in the rates, whether emergencies carry higher rates, and what handling fee applies to replacement parts.
• Payment terms. Whether an advance payment applies to urgent repairs, and what the payment period and late payment terms are.
• Reports. Each visit should produce a report from the attending engineer, completed on a standard form.
• Site safety. The service provider complies with the site’s own safety requirements, and any additional training is negotiated.
• Licences and permissions. The operator is responsible for the permits needed for the work.
• Termination. Define what counts as a breach, how it can be cured and what is paid on termination.

Standards and guidance

The draft proposed a list of standards. Whatever list is used, check that each standard really applies to a flare before naming it in a contract. A relevant source for maintenance work is the HSE’s guidance on the safe isolation of plant and equipment (HSG253). For enclosed flares in the UK, the Environment Agency’s monitoring guidance (LFTGN05) sets expectations for temperature and monitoring, which the service regime must preserve.

What to consider for your own project

1. List the equipment. Include the blower, knockout pot, instruments and control system, not just the stack.
2. Agree fault classes and times in writing.
3. Decide who holds spares. Typical wear items are UV bulbs, ignition electrodes and thermocouples.
4. Insist on a service report after every visit.
5. Check the commercial terms for emergency rates, parts mark-up and payment.

FAQ

How often should a landfill gas flare be serviced?

The frequency is agreed for each component with the operator. The draft in this project left the schedule to be agreed rather than fixing one interval.

Who classifies a fault as urgent?

The service provider, in consultation with the client, using agreed categories.

What should a service report contain?

The items on the engineer’s standard form, completed during and after the visit, delivered to the client after the visit.

Does a service agreement replace the manufacturer’s warranty?

No. Warranty terms often depend on satisfactory servicing arrangements being in place, so the two work together.

Drafting a flare service agreement?

Tell us about your flare and site and we will discuss scope, response times and a service plan.