Hahn & Clay's Field Services division has over 40 years of experience in on-site field service repair. We have extensive experience in providing reliable engineering repair services in the industrial, petroleum and petrochemical market places. Our Field team is on call 24 hours a day, 7 day a week, to satisfy your onsite needs!

Industry Leaders turn to us for repairs on:

  • O.D. Flange Facing
  • Heat Exchanger Re-tube
  • I.D. Flange Facing
  • Air Cooler Re-tube
  • Pipe Cutting and Beveling
  • Exchanger/Air Cooler Repair
  • Milling
  • Hydro Testing
  • Line Boring
  • Weld Repair
  • Drilling and Tapping
  • Marine Vessel Repair
  • Bolting Torquing
  • Mechanical Services
  • Stud Tensioning
  • Coker Maintenance and Repair


Turnaround Services

We are a prime contractor for providing turnkey turnaround services, planning, estimating, and execution. We provide a reliable, trained work force to assist in turnarounds.

Field Machining

Includes flange facing, pipe cutting, weld prep, line boring, drilling/tapping, journal turning, key way cutting, milling, grinding, lapping and honing.

Vessel Repair

ASME Section VIII Division I & II code repairs

Vessel Construction

Field erected tanks, columns and towers.

Boiler Repair

ASME code repair, retubes, plugs, and refractory repair.

Heat Exchanger

Air coolers, shell & tube and plate, extracting, retubes and shell repairs.

Valve Repair

Valve re-conditioning and complete overhaul to as-new condition.

Hydraulic Tensioning or Torquing

Precision bolting service and/or rental equipment.

Pipe Fabrication

Shop pre-fabricated pipe spools and field erected spools.

  • Heat Exchanger Re-tube
  • Field Vessel Repair