Our Process

From Consultation to Completion

CONSULTATION

Marine Exhaust Systems Built To Perform

At Halyard, we offer a complete end-to-end service for the design and manufacture of marine exhaust systems, silencing solutions, and specialist components. Our structured process ensures that every project is engineered to meet the operational needs of your vessel, satisfying the agreed design parameters and complying with any Marine Classification Society regulations.

Whether you’re specifying a new build or refitting a commercial vessel or yacht, we collaborate closely with your team from initial enquiry to final installation.

Our process begins with a comprehensive consultation phase. During this stage, we work closely with vessel owners, captains, naval architects, shipyards, and design teams to fully understand your requirements. We listen, advise, and define clear project objectives before any design work begins.

This collaborative stage is essential to ensure all technical, spatial, and regulatory factors are accounted for.

The consultation process includes:

  • Halyard scope of supply definition
  • Identification of detailed system technical specification
  • Classification Society requirements (e.g. Lloyd’s Register)
  • Space planning and vessel layout considerations
  • Design, delivery, and launch schedules
  • Exhaust outlet positions and pipe routing
  • Refit or build site requirements
  • Contact points within your team
  • On-site inspections where needed

From this, we develop a design brief, timescale, and clear project plan.

DESIGN

Engineered for Every Application

Following consultation, our engineers begin the design phase — building the detailed system layout, layout drawings, and system documentation.

We use this phase to align all parties on specification, layout, and performance goals, ensuring a smooth transition to manufacture.

This stage includes both technical detail and customer collaboration, maintaining full transparency throughout.

  • System General Arrangement (GA) 3D modelling
  • Back pressure and safety calculations
  • Acoustic attenuation and silencer selection
  • Exhaust pipe routing
  • Water injection positioning
  • Spray ring design
  • Bypass integration where applicable
  • Selection of silencers, separators, and connections
  • Support and mount configurations
  • Thermal insulation requirements
  • Creation of manufacturing drawings
  • Customer sign-off and approval

MANUFACTURE

In-House Fabrication Backed by Decades of Experience

With the design finalised, we move into production. Halyard manufactures the majority of system components in-house, maintaining full control over quality, traceability, and turnaround times. For processes that require external partners, we work with a trusted network to ensure seamless delivery.

All components are produced following ISO 9001:2015 processes, and ensuring Classification Society compliance as required

Metal Fabrication
  • Fabricated to the exact project geometry
  • Manufactured from stainless steels and specialist corrosion resistant alloys
  • Systems include the necessary mounting brackets, supports, and mounts
Hose, Bellows & Connectors
  • Made from Nitrile, EPDM, Silicone or Nomex
  • Sizes from 25-508mm ID
  • An extensive range of standard products or bespoke solutions
Composite Manufacture
  • Silencers, Separators, Tube & Connectors
  • An extensive range of standard products or bespoke solutions
  • Filament winding, wet layup, moulded forms

Ready To Start Your Project?

At Halyard, quality, safety, and compliance are at the core of everything we do. Our products and processes are independently certified to internationally recognised standards, giving clients confidence that every system we design and manufacture meets strict performance and regulatory requirements.

Request A Call Back

Have a question or project in mind? Our team is ready to help.


Need Assistance?

Reach out to our support team for help with products, installation, or any inquiries.

Warranty & Aftercare

Our products come with warranties. For aftercare support, please contact us directly.

Technical Support

We provide technical support for all our systems. Please get in touch for troubleshooting or advice.

Document Downloads

Access manuals, datasheets, and product guides via our resource centre.