Our Welding Services Include:
High-pressure steam and hot water piping systems
Process piping for industrial applications
Gas distribution piping systems
Boiler and pressure vessel connections
Commercial building mechanical systems
On-site and shop-based welding projects
All welding is performed under our ASME Section IX certified program with documented procedures and qualified welder performance records.
What ASME Section IX Certification Means:
ASME certification is required for pressure piping and vessel welding in Minnesota, demonstrating:
Documented and tested welding procedures
Qualified welders who passed performance tests
Code compliance with state requirements
Complete documentation for quality assurance
Licensed for High-Pressure Work:
Mechanical Contractor License #MB100229
High-Pressure Piping Contractor License #HC802574
ASME Section IX Welding Program
All Services
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![Industrial piping system with black pipes, blue and red valves, installed on gravel ground.]()
Industrial Pipe Fabrication
Custom pipe fabrication and prefabrication for industrial and commercial projects. Our master pipefitters deliver precision-crafted piping solutions for steam, process, and high-pressure applications throughout the Twin Cities metro area.
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![A metalworking lathe machine performing a welding or grinding process with sparks and smoke.]()
ASME Section IX Certified Welding
ASME Section IX certified welding program for high-pressure piping, pressure vessels, and critical applications. Our licensed welders are qualified in TIG, MIG, and stick welding for carbon steel, stainless steel, and specialty materials.
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![Industrial boiler system with interconnected pipes, valves, and control panels in a mechanical room.]()
Steam, Process & Gas Piping Installation
Complete installation of steam, hot and cold water, process piping, and gas distribution systems. Licensed for high-pressure piping applications (HC802574) in commercial, industrial, and municipal facilities.
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![Two industrial boilers in a mechanical room with extensive piping and control panels.]()
Mechanical Room Modifications
Mechanical room upgrades, equipment replacements, and complete system redesigns. We optimize existing spaces for improved efficiency, code compliance, and operational performance in commercial and industrial facilities throughout Minneapolis/St. Paul.
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![Industrial HVAC equipment including a large black chiller with a red logo, pipes, valves, gauges, and a metal frame in a utility room.]()
Commercial Boiler Installation & Replacement
Complete commercial boiler installation, replacement, and component services. Licensed mechanical contractors (MB100229) experienced with all boiler types for commercial buildings, industrial facilities, and institutional applications.
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![Industrial construction site with large metal pipes, scaffolding, and safety barriers under a corrugated metal roof.]()
Industrial Pump Installation Services
Expert pump installation for hydronic systems, process applications, and industrial equipment. Complete installation, including piping connections, electrical coordination, and system start-up for commercial and industrial projects.
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![Commercial Air System Installation Minnesota]()
Compressed Air Systems
From compact compressed air systems for small commercial operations to large industrial distribution networks with multiple compressors and extensive piping runs, KO Mechanical delivers code-compliant installations throughout the Twin Cities metro.
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![Custom mechanical Project]()
Custom Projects
Have a project that doesn't fit a standard category? KO Mechanical works with commercial and industrial facilities on custom mechanical scopes — from unique piping configurations to complex equipment installations.
Have Questions for KO Mechanical?
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