Delivering complex heat exchangers and vessels for the industries that power the world.
PRECISION UNDER PRESSURE
Today’s critical industries operate under extreme heat, pressure, and nonstop demand. The equipment behind them must perform without fail.
Getting this right requires deep experience, advanced capabilities, and absolute precision.
With engineering, machining, welding, and testing all in-house, we deliver complex exchangers and alloy vessels fast, accurately, and ready for the toughest environments.
70
YEARS OF EXPERIENCE
100K
SQ FT IN SARNIA
24/7
EMERGENCY RESPONSE
1
ROOF. START TO FINISH
CORE CAPABILITIES
Our Core Capabilities
Heat
Exchangers
Shell-and-tube, hairpin, and licensed Helixchanger® fabrication for the duties that punish ordinary steel.
Pressure Vessels & Specialty Equipment
Columns, towers, reactors, drums, and separators in high-alloy and corrosion-resistant
materials.
Retubes, Repairs &
Life Extension
R-stamp repairs, code alterations, and fitness-for-service assessments that earn you another full cycle.
High-Alloy Fabrication & Weld Overlay
Chrome-moly, high-nickel, and exotic alloys with documented weld procedures and modular
PWHT.
Testing, NDE & Code Compliance
In-house NDE, hydrostatic testing, PMI, and full documentation under ASME, National Board, and TSSA.
24/7 Emergency Response & Field Services
The call you make when the plant just went down. Mobilization measured
in hours.
CORE CAPABILITIES
Complex work demands more than fabrication. It demands experience, ingenuity, and the ability to deliver under pressure.
01
Integrated Expertise
Engineering, machining, welding, and testing happen under one roof,
enabling faster builds, tighter coordination, and higher confidence.
02
Deep Metallurgy Knowledge
Decades of experience with high-alloy materials and advanced metallurgy lets us take on projects others turn away.
03
Speed Without Compromise
When timelines collapse, we don’t. Our processes, supplier relationships, and in-house capabilities deliver emergency builds in weeks, sometimes days.
04
Solutions Born from Experience
Every challenge is reviewed by a team that has seen thousands of unique configurations and field conditions. We know what works and what fails.
INDUSTRIES WE SERVE
Complex industrial environments demand equipment built for heat, pressure, corrosion, aggressive media, and nonstop service. We support the sectors where reliability isn’t negotiable and where getting it right keeps essential infrastructure online.
When your exchanger fails, every day can cost you millions.
Our North American Ontario-based experts are ready to take your call.
View Our Work
Proudly now part of the RPS Industrial Group
Alliance Fabricating joined the RPS Industrial Group in December of 2025. RPSIG is a family of specialized companies serving mission-critical industries across North America.
A shared commitment to complex work.
Alliance and RPSIG align on the same core belief: the industries that power the world deserve partners with the experience, precision, and discipline to take on the toughest projects. Together, we deliver boutique expertise at scale — solving problems others won’t attempt and supporting customers when the stakes are highest.
When performance counts, experience matters.