What We Do
Engineering Services
From large-scale industrial pipework contracts to precision bespoke fabrications, AA Simpson delivers engineered solutions built to the highest standards.
Full-Spectrum Welding & Pipework Engineering
AA Simpson are specialist welding and pipework engineers based in Scotland, delivering projects across the UK. With over 25 years of industry experience, our team of certified welders and engineers brings technical expertise and a commitment to quality to every contract.
Whether you require a complete industrial pipework installation, a one-off bespoke fabrication, or an ongoing maintenance programme, we have the skills, equipment, and experience to deliver on time and to specification.
01 — Industrial Pipework
Complete Pipework Solutions for Industry
We design, fabricate, and install industrial pipe systems for process, utilities, and infrastructure applications across a wide range of sectors including oil and gas, food and beverage, pharmaceutical, and manufacturing.
- Process pipework design and installation
- Carbon steel, stainless steel, and duplex pipework
- Pressure testing and commissioning
- Compliance with BS EN and ASME standards
- New installations and modifications to existing systems
02 — Bespoke Fabrication
Custom-Engineered to Your Exact Specification
Our fully equipped fabrication workshop produces bespoke steel components and assemblies to exact client specifications. From structural steelwork to complex pressure vessels, we combine skilled craftsmanship with modern fabrication techniques.
- One-off and batch fabrication
- Structural steelwork and frames
- Pressure vessels and tanks
- Skid-mounted equipment assemblies
- Full weld procedure qualification records
03 — Maintenance & Repair
Keeping Your Systems Running Safely
We provide planned preventative maintenance and reactive repair services for pipework and fabricated systems. Our engineers work efficiently to minimise downtime and ensure your plant remains safe, compliant, and operational.
- Planned preventative maintenance programmes
- Emergency reactive repairs
- Weld repairs and modifications
- Inspection and condition reporting
- Shutdown and turnaround support
04 — Site Surveys
Accurate Surveys for Informed Decisions
Our experienced engineers carry out detailed site surveys to assess existing pipework and fabricated structures, identify defects, and provide clear recommendations for repair, modification, or replacement.
- Condition surveys and assessments
- As-built drawings and documentation
- Defect identification and reporting
- Pre-project feasibility surveys
- Isometric and general arrangement drawings
05 — Project Management
End-to-End Project Delivery
We manage the full project lifecycle from initial enquiry through to handover, coordinating design, procurement, fabrication, installation, and commissioning to deliver on time and within budget.
- Project planning and programming
- Design coordination and liaison
- Procurement and supply chain management
- Health, safety, and quality management
- Client reporting and handover documentation
Have a Project in Mind?
Get in touch with our team to discuss your requirements. We'll provide expert advice and a competitive quotation.