Welding & Fabrication Services

Project Management & Planning

Fabrication, Installation, & Other Field Services

Manual, Semi-Automatic, & Machine Welding

Large Component Removal & Replacement

Welder Qualifications & Training

First-of-a-Kind (FOAK) & Mock-up Services

Bringing Big Ideas to Life

Industries at the forefront of discovery, face many unique challenges getting projects off the ground. For more than a century, forward-thinking companies on the leading edge of innovation have trusted Day & Zimmermann to meet their highest expectations for safety, quality, and precision and help them bring big ideas to life.

We deliver safe, high-quality, and predictable performance from concept development and engineering to prefabrication and installation to preventative maintenance using our QA/QC accredited programs.

Our Tennessee, North Carolina, and Arizona fabrication shops are outfitted with the latest technology and equipment to meet most project requirements.

  • ASME Pressure Vessel Fabrication and National Board Inspection Code (NBIC) - Repair
  • Concept-to-creation Fabrication
  • Planning and Mock-up Services
  • Final Testing and Acceptance
  • Structural Steel Platforms, Mezzanines, & Stairs
  • High-Purity Piping Fabrication and Installation
  • Sanitary Process Piping

We can simulate clean room conditions including setups for limited access and complex configuration welds.

Our welding and fabrication team strictly adheres to code requirements and hold-point verification, using informational non-destructive examination (NDE) and supervisor training to maintain the highest performance.

Training & Workforce Development

UA Welder Certification Program

Construction Users Round Table (CURT)

Helmets to Hardhats (for military service members)

State-level building trades groups

Machining & Other Services

 

Field and shop end-prep piping and tubing materials

Feedwater heater cutouts

Flange facing

Hole boring

Qualified machining personnel

Full Non-destructive Examination (NDE)

Post Weld Heat Treat (PWHT)

Quality Processes, Procedures, & Certifications

ASME Section IX

S Stamp, U Stamp, NBIC "R" Stamp

10 CFR Appendix B

“My company has worked with D&Z Welding Services for the past three years as a partner on numerous projects, and I look forward to working with them again for future plant modifications. The company offers high-quality service, and I have been more than satisfied by their work and leadership.”

Framatome Project Manager at Palo Verde Nuclear Generating Station

Our Success

0

Injuries

0.12

Weld Reject Rate

40+

Years of Welding Expertise

170+

Projects Completed

Industries We Serve

Power

Process & Industrial

Pulp & Paper

Liquefied Natural Gas

Pharmaceuticals

Manufacturing

Aerospace

Defense

How can we help you?

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