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
Field and shop end-prep piping and tubing materials
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
Feedwater Heater Replacement & Condenser Heater Support System Install
Removed and replaced a low-pressure feedwater heater, including all associated piping as well as structural and equipment obstructions at a customer's nuclear power plant.
- Finished all scheduled activities ahead of schedule and with zero recordable incidents.
- Completed the projects under budget, saving our customer more than $450,000
Industries We Serve
Nuclear
Process & Industrial
Advanced Manufacturing
