Plant Turnaround and Maintenance Works

HFS’s provides a holistic approach in Plant Turnaround Services which assist our customers from consultation, installation to regular maintenance works.

Our Services Include:

Plant Turnaround service
Equipment/vessel cleaning, inspection and repair
Piping repair, modification and installation work
Safety valve testing and calibration
Provision of manpower supply services

General HRSG Inspection

A visual survey of the general HRSG condition, external casing, internal gas-side mechanical parts and auxiliary equipment. Readily accessible pressure part components are visually inspected. HFS recommends performing such a general inspection in addition to the basic inspections stipulated by local regulatory requirements. Time frame requirement: 2 – 3 days HRSG accessibility.

Aligning HRSG Inspections for Optimized Availability

In order to prevent forced outages, periodic inspections should be conducted during scheduled outages. This allows the identification of component damage in the earliest stages – when there is still time to schedule a cost-effective repair.

HFS recommends a general inspection every 1 to 2 years and a more detailed inspection every 3 to 5 years. In order to optimize the overall plant availability, it is important to align these inspections with those of the gas turbine. Therefore, the detailed inspection should coincide with a gas turbine planned outage, e.g. the major or hot gas path inspection.

Detailed HRSG Inspection

Includes all the general inspection steps plus a more detailed visual inspection of all accessible pressure parts. This visual inspection will identify any areas of concern that require subsequent non-destructive examination (NDE) to be performed by HFS qualified NDE technician. Time frame requirement: 4 – 6 days HRSG accessibility.

Specification of High Frequency Welded (HFW) Finned Tube
Tube/Pipe Material	Carbon Steel, Stainless Steel, Copper, Inconel, Titanium
Fin Material	Carbon Steel, Stainless Steel, Copper, Aluminum
Tube/Pipe OD	8.0mm ~ 219.1mm
Fin Type	Solid and Serrated
Fin Height	5.0mm – 20mm( 50% of tube OD, up to 80% in special request)
Fin Thickness	0.4mm ~ 3.0mm
Fin per Meter (FPM)	Max. 520 fin (based 0.4t fin)
Tube Length	Max. 27,000 mm
Application	– Oil & Gas: ACHE(Air cooled), HVAC, Economizer, Heat exchanger, Air Preheater, Fired Heater – Power plant: HRSG, Nuclear, GGH(Desulfurization)

Advantage of High Frequency Welded(HFW) Finned Tube vs Embedded Fin (G type) & Extrude Type
Weldability	High Frequency Welded (HFW) can be applied dissimilar tube and fin welds instead of G-Type and Extrude Type
Efficiency	Higher heat exchange efficiency, 10% higher than G-Type, 15% higher than Extruded
Cost Save for Material	Tube material cost saving, 10% for G-type (0.3mm Groove), Much less for Extruded Type
Flexible Fin Pitch	Smaller and lighter equipment
Tube Size and Quantity	Minimum 10% reduce tube size and quantity
Higher Temperature	Applied to higher temperature depend on design temperature
Strong Durability & Maintenance	Strong durability with welded fin, Easy handling and waterjet washed.

Services

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Plant Turnaround and Maintenance Works

Our Services Include:

General HRSG Inspection

Aligning HRSG Inspections for Optimized Availability

Detailed HRSG Inspection

Services

Boiler & HRSG

Valve Division

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