Industrial Mechanical Contractor for Plants, Facilities & Critical Projects

DePue Mechanical helps industrial, commercial, and process facilities complete mechanical work safely, efficiently, and with less downtime. From piping and code welding to HVAC, maintenance, equipment setting, and emergency repairs, we handle the work that keeps facilities running.

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TRUSTED BY ILLINOIS FACILITIES

Built for Critical Mechanical Work

SERVING ILLINOIS FACILITIES SINCE 1964 • ASME CODE WELDING CAPABILITIES • 24/7 EMERGENCY REPAIR • INDUSTRIAL AND PROCESS FACILITY EXPERIENCE

DePue Mechanical is a union industrial mechanical contractor based in Minooka, Illinois. Since 1964, we have supported industrial plants, process facilities, commercial buildings, municipalities, and general contractors with mechanical construction, industrial piping, ASME code welding, commercial HVAC, sheet metal, skid fabrication, equipment setting, BIM/VDC coordination, maintenance, and 24/7 emergency mechanical repair.

Our work is built around active facilities where safety, uptime, access, compliance, and schedule coordination matter.

SERVICES

Industrial Mechanical Services for Illinois Facilities

Choose the mechanical service that best fits the work in front of you.

DePue Mechanical supports industrial, commercial, municipal, and process facilities across Illinois with piping, ASME code welding, HVAC, sheet metal, skid fabrication, maintenance, equipment setting, emergency repair, BIM/VDC coordination, and prime project coordination.

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Industrial Piping Contractor in Illinois for Manufacturing and Process Facilities ASME Code Welding Services in Illinois Industrial Welding Contractor in Illinois Commercial HVAC Maintenance Services 24/7 Emergency Mechanical Repair Services Equipment Setting & Structural Steel Fabrication Services for Industrial Facilities Industrial Sheet Metal Fabrication in Illinois Skid Fabrication Industrial Prime General Contractor & Design-Build Services

Before the work reaches the field, DePue helps define the scope, identify mechanical risks, and plan around safety, access, downtime, and field conditions.

PROJECT PROOF

Project Proof Across Industrial Piping, Code Welding, HVAC & Equipment Setting

From emergency-driven repairs to full mechanical installations, DePue Mechanical supports industrial, commercial, and process facilities with field crews, fabrication support, code welding, piping, equipment setting, and project coordination.

Gas Line Installation
Manufacturing | Underground Gas Line Replacement | Underground gas line installation to replace an undersized line and support increased production demand.
High-Pressure Steam Boiler
Industrial Facility | Boiler Installation, Pressure Piping & Safety Systems | Boiler installation, pressure piping, and safety system support for critical steam testing operations.
Modular Skid Fabrication
Chemical & Process | Skid Fabrication, Process Piping & Utility Tie-Ins | Shop fabrication, skid setting, process piping, utility tie-ins, and turnkey installation for a chemical process upgrade.
Boiler Room & Industrial Piping
Food & Beverage | Mechanical Equipment Installation & Code Welding | Mechanical equipment installation, utility piping, code welding, and schedule recovery support for a food manufacturing expansion.
Food Plant Piping Expansion
Food & Beverage | Utility Piping, Sanitary Tubing, HVAC & Controls | Utility piping racks, sanitary process tubing, gas, water, HVAC, and control system support for a large food manufacturing expansion.
Chemical Plant Cooling Support
Chemical & Process | Cooling Tower Replacement & Industrial Piping | Cooling tower replacement and industrial piping support completed for a chemical plant with continuous production needs.

DePue Mechanical crew performing industrial piping and valve work inside an active process facility.

INDUSTRIES SERVED

Mechanical Contracting for Facilities That Cannot Afford Downtime

DePue Mechanical supports industrial, commercial, municipal, and process facilities across Illinois with mechanical work planned around safety, uptime, compliance, and field coordination. Explore the industries below to find the experience most relevant to your facility or project.

Food & Beverage
Mechanical support for food plants, beverage facilities, production upgrades, piping, shutdowns, equipment tie-ins, and facility improvements.
Chemical & Process
Piping, code welding, maintenance, corrosion-related repairs, shutdown work, and equipment connections for process-driven facilities.
Water & Wastewater
Mechanical piping, pump and valve tie-ins, treatment plant upgrades, prefabrication, and shutdown-sensitive support for municipal facilities.
General Contractors
Union mechanical subcontracting for general contractors on industrial and commercial projects where safety, schedule, and coordination matter.
Manufacturing & Industrial Facilities
Industrial piping, utility systems, equipment tie-ins, maintenance, fabrication, shutdown work, and emergency repairs for active facilities.
Power Generation
Planned outages, ASME code welding, pressure piping, HRSG and boiler repairs, equipment replacement, and emergency mechanical support for power generation facilities.
Commercial Buildings
Commercial HVAC, maintenance, repairs, replacements, equipment support, and mechanical service for buildings that need reliable operation.

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WHY DEPUE MECHANICAL

Why Facilities Choose DePue Mechanical

DePue Mechanical supports industrial and commercial facilities where downtime, safety, access, and schedule coordination matter. Our team brings field experience, fabrication support, ASME code welding capabilities, and mechanical project coordination to work in active facilities.

Built for Active Facilities

We plan mechanical work around safety, uptime, access, tie-in windows, and field conditions so projects can move forward with fewer surprises.

Field Crews + Fabrication Support

Our team supports projects with industrial piping, code welding, HVAC, sheet metal, skid fabrication, equipment setting, and shop fabrication capabilities.

Illinois Facility Experience

Since 1964, DePue Mechanical has supported industrial, commercial, municipal, and process facilities across Illinois.

Emergency Response When It Matters

DePue provides 24/7 emergency mechanical repair for facilities that need help stabilizing problems before downtime, safety, or production issues escalate.

Planning a Project, Shutdown, Repair, or Equipment Upgrade?

Contact DePue before the work gets messy. We can help review the scope, identify mechanical risks, and determine the right next step before downtime, delays, or coordination issues become expensive.

"Our first priorities are the safety of our people and the satisfaction of our clients. We believe that the important work we do positively impacts our employees, our clients and the community at large."

Jim Jacobsen Sr. Chief Executive Officer

FREQUENTLY ASKED QUESTIONS

Industrial Mechanical Contractor FAQs

What type of contractor is DePue Mechanical?

DePue Mechanical is a union industrial mechanical contractor based in Minooka, Illinois. We support plants, process facilities, commercial buildings, municipalities, and general contractors with mechanical construction, fabrication, maintenance, and emergency repair.

What services does DePue Mechanical provide?

DePue provides industrial piping, ASME code welding, commercial HVAC, maintenance services, sheet metal, skid fabrication, equipment setting, structural steel fabrication, BIM/VDC coordination, prime general contracting, and 24/7 emergency mechanical repair.

Does DePue Mechanical work directly with plant owners?

Yes. DePue works directly with plant managers, maintenance managers, facility managers, facility engineers, operations teams, and owner project managers.

Does DePue Mechanical work with general contractors?

Yes. DePue supports general contractors as a union mechanical subcontractor for industrial and commercial projects where safety, schedule, coordination, and field execution matter.

What areas does DePue Mechanical serve?

DePue Mechanical serves facilities across Illinois, with a strong focus on Northern Illinois and the Greater Chicago region.

Does DePue Mechanical offer emergency repair?

Yes. DePue provides 24/7 emergency mechanical repair for industrial and commercial facilities.