Sheet Metal & Pipe Fabrication


Sheet Metal Fabrication

Pipe and Duct Systems sheet metal fabrication shop offers custom fabrication for air distribution systems, ornamental and architectural components, structural steel supports, brackets and frames, specialty insulated industrial equipment fabrication and insulated enclosures for sound attenuation. Our extensive sheet metal shop and experienced craftspeople construct quality, precise products ranging from 1/4” plate and 10 gauge stainless to 26 gauge galvanized 16-ounce copper, expanded metal and black iron for:

HVAC Retrofits
Complete HVAC systems
Data Centers
Tenant Improvements
Ventilation and exhaust systems
Clean Rooms
HVAC protection cages


Pipe Fabrication

Our sister company, Gross Mechanical, has a 55,000 sq. ft. facility equipped with high-performance equipment to complete all power, industrial, and process piping fabrication and construction needs.

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  • 55,000 square foot shop in downtown St. Louis
  • 9 overhead cranes
  • Up to 25 welding stations

  • Flux core, gas metal arc, submerged arc, and gas tungsten arc
  • 100+ weld procedures on almost any metallurgy in the industry
  • Indoor area for modular or skid construction

  • Separate carbon steel and stainless steel fabrication areas
  • Nondestructive examination (NDE) and hydro testing area

  • Full-time, Certified Welding Inspector (CWI)
  • Structural steel fabrication area

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Learn more about our capabilities


Pipe and Duct Systems LLC

Pipe Systems Mechanical LLC and Duct Systems, Inc., combined services in 2018 to better serve our customers.




Our Office

2089 Corporate 44 Drive
Fenton, MO 63026

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