Which codes are exhaust stacks designed to?

Stacks are designed to the client-nominated basis — most commonly ASME STS-1 (steel stacks) or EN 13084 with the EN 1993 structural rules — covering wind and seismic loading, dynamic response and fabrication, welding and inspection requirements.

How is vortex shedding controlled on tall stacks?

Aras checks the stack's natural frequencies against the critical wind speed and, where required, mitigates cross-wind vibration by adjusting the shell geometry and stiffness or by adding aerodynamic devices such as helical strakes or damping systems, verified by dynamic analysis.

Can dampers, silencers and monitoring ports be integrated into the stack?

Yes. Aras engineers the stack together with its diverter or isolation dampers, silencers, expansion joints, access platforms, aviation lighting and emission-monitoring (CEMS) ports so the interfaces are resolved in one design scope.

Are stacks shop-fabricated or erected on site?

Both. Stacks are fabricated in shop-transportable sections with prepared weld edges, then assembled and erected on site, followed by NDT, coating repair and commissioning checks.

Exhaust Stacks

Aras Power Systems engineers and supplies high-performance exhaust stacks for power plants and industrial facilities, with designs tailored for safe discharge, low pressure drop, structural reliability and long service life. Stack systems are developed for project-specific flow, temperature, emission, wind, seismic and maintenance requirements, using CFD for flow optimisation and FEA for elevated-temperature structural integrity.

Codes & standards

Aras Power Systems designs exhaust stacks and freestanding chimneys to the client-nominated code basis, combining international standards with project-specific operating, safety and documentation requirements.

ASME STS-1
EN 13084
EN 1993 / Eurocode 3
ASME IX
ISO 12944

Our Services

Our engineering and supply scope is structured to deliver safe, efficient and project-specific equipment from concept design through fabrication, site support and documentation.

Design compliance

ASME STS-1 and EN 13084: designing steel stacks and freestanding chimneys according to internationally accepted code requirements.
Custom engineering: tailoring stack diameter, height, arrangement, support concept and access details to the operating and environmental conditions of each project.

Computational Fluid Dynamics (CFD)

Airflow optimisation: analysing flow distribution, outlet velocity and pressure drop to support efficient exhaust dispersal.
Thermal performance: evaluating hot-gas behaviour, mixing and temperature profiles for reliable stack operation.

Finite Element Analysis (FEA)

Structural integrity: checking wind, seismic, thermal, dead-load and operational load cases.
Fatigue and vibration review: assessing natural frequencies, vortex shedding risk and damping requirements.

Elevated-temperature design

High-temperature operation: selecting materials, expansion details and supports for elevated exhaust temperatures.
Thermal expansion control: incorporating sliding supports, expansion joints and flexible interfaces where required.

Insulation, lining and corrosion protection

Internal insulation: reducing heat loss and protecting external structures where applicable.
Stainless lining and coating: applying corrosion-resistant liners and external coating systems according to exposure class.

Documentation and quality assurance

Engineering package: providing calculations, drawings, specifications and installation guidelines.
Inspection support: defining welding, NDT, coating and dimensional control requirements.

Technical specification

Equipment	Self-supporting stacks, guyed stacks, exhaust chimneys, liner systems
Design basis	Gas flow, temperature, pressure drop, emissions, wind and seismic loads
Analysis	CFD flow review; FEA structural and thermal verification
Materials	Carbon steel, weathering steel, stainless steel liners as required
Scope	Engineering, fabrication, coating, access platforms, ladders and site support

All ranges are a configurable engineering design envelope, finalised against project-specific data and applicable codes.

Applications

Gas turbine and engine exhaust systems
Combined-cycle bypass stacks
Industrial boiler and process exhausts
Cement, steel, refinery and petrochemical plants

Frequently asked questions

Which stack standards do you use?

Stack designs can be developed according to ASME STS-1, EN 13084 and related structural standards such as EN 1993, depending on the project location and client specification.

Can you perform CFD and FEA for stack systems?

Yes. CFD is used to evaluate flow and pressure drop, while FEA is used for structural, thermal, wind and seismic verification.

Can you supply platforms and access systems?

Yes. Ladders, platforms, sampling ports, access doors, lifting points, aviation lights and maintenance provisions can be included in the supply scope.

Request engineering & a budget

Send your process data, site conditions and code basis, and the Aras engineering team will respond with a tailored concept and budget.

info@araspowersystems.com · +90 312 504 20 26 · +90 530 427 39 44