Hahn & Clay
Field Services
Efficient, Reliable, and Scalable
Field Services
For more than 40 years, Hahn & Clay’s Field Services division has been the trusted partner for on‑site industrial repair, maintenance, and mechanical services. We specialize in delivering fast, reliable, and highly skilled field support to the industrial, petroleum, and petrochemical sectors—where precision, safety, and uptime matter most.
Our expert Field Services team is available 24 hours a day, 7 days a week, ready to mobilize and keep your operations running smoothly with minimal downtime.
Trusted by Industry Leaders for On‑Site Repair & Maintenance
We provide a full spectrum of field‑ready capabilities, including:
O.D. Flange Facing
I.D. Flange Facing
Pipe Cutting & Beveling
Line Boring
Milling
Drilling & Tapping
Weld Repair
Bolting Torquing
Stud Tensioning
Mechanical Services
Hydro Testing
Heat Exchanger Re‑Tube
Air Cooler Re‑Tube
Exchanger & Air Cooler Repair
Marine Vessel Repair
Coker Maintenance & Repair
From routine service calls to complex field repairs, Hahn & Clay offers the expertise, equipment, and responsiveness you need to keep your operations safe, productive, and efficient.
Hahn & Clay operates as a seamless extension of your workforce or as a prime contractor, providing the expertise and manpower required to execute critical shutdowns and turnarounds. We manage the full scope—from detailed planning and accurate estimating to disciplined, safety-focused execution.
Our experienced planners, supervisors, and craftsmen deliver reliable performance that keeps outages on schedule and facilities returning to operation quickly. When downtime matters, partner with a team that brings structure, skill, and consistent results.
We are committed to ensuring every shutdown and turnaround is completed efficiently, safely, and with minimal disruption to your operation.
Contact us to learn how our turnkey outage services can support your next project.
Onsite Mechanical Services: Hahn & Clay Field Service provides dependable onsite mechanical support through skilled crews trained to dismantle exchangers, piping, reactors, valves, and related equipment with safe, efficient precision. Acting as an extension of your workforce, we help maintain schedules, reduce downtime, and ensure every task is completed with strong attention to safety and detail.
Hahn & Clay delivers certified, code‑compliant vessel repair services backed by decades of pressure‑equipment expertise. Our team is fully qualified to perform repairs under ASME Section VIII, Division I and II, ensuring every project meets the highest standards for safety, integrity, and regulatory compliance.
We restore pressure‑retaining equipment to peak performance with precision workmanship, rigorous quality control, and a commitment to long‑term reliability. Whether addressing wear, damage, or critical operational issues, our field service specialists provide solutions that keep your equipment running safely and efficiently
Hahn & Clay provides specialized construction and repair services for field‑erected tanks, columns, and towers—delivering safe, reliable, and fully code‑compliant results for your most critical process equipment. Our field teams combine deep industry experience with rigorous quality standards to ensure every structure is built or restored for long‑term performance, operational integrity, and regulatory compliance.
Hahn & Clay delivers comprehensive, code‑compliant boiler repair services designed to keep your systems operating safely and efficiently. Our field teams are fully qualified to perform ASME‑certified repairs, including retubing, tube plugging, and complete refractory restoration.
With a focus on safety, reliability, and long‑term performance, we provide solutions that restore boiler integrity, extend equipment life, and support uninterrupted plant operations. Whether addressing routine maintenance or critical repairs, Hahn & Clay ensures your boiler systems return to peak performance with precision and confidence
Hahn & Clay provides comprehensive field repair and maintenance services for air coolers and both shell‑and‑tube and plate heat exchangers. Our technicians deliver precision tube extraction, retubing, and shell repairs that restore thermal performance, improve reliability, and extend equipment life.
With a focus on safety, quality, and long‑term operational efficiency, we ensure your heat exchangers return to service quickly and operate at peak performance under demanding process conditions.
Hahn & Clay provides complete valve reconditioning and overhaul services designed to return each unit to as‑new operating condition. Our technicians restore critical components with precision machining, expert rebuilding, and rigorous testing to ensure reliable performance and extended service life.
From routine maintenance to full system overhauls, we deliver valve repair solutions that enhance safety, improve operational efficiency, and keep your process equipment running at peak performance.
Hahn & Clay provides precision hydraulic tensioning and torquing services to ensure critical bolted connections across your facility are installed with absolute accuracy and consistency. Our field teams deliver reliable, controlled bolting solutions supported by a full range of high‑performance rental equipment.
Whether supporting routine maintenance or major shutdowns, we help you achieve proper preload, reduce leak potential, and extend equipment life. With industry‑leading tools and expert technicians, Hahn & Clay ensures every connection is tightened to exact specifications for safe, dependable operation
Hahn & Clay delivers high‑quality pipe fabrication services to support construction, maintenance, and repair projects of any scale. We provide both shop‑fabricated pipe spools and field‑erected spools, ensuring precise fit‑up, reliable performance, and seamless integration into your existing systems.
Our fabrication teams combine skilled craftsmanship with stringent quality controls to produce piping solutions that meet exact specifications and withstand demanding operating conditions. From new installations to critical repairs, Hahn & Clay delivers the accuracy, durability, and efficiency your project requires
Onsite Field Machining, Delivered
Hahn & Clay Field Machining brings full machine shop capabilities directly to your site—reducing downtime, cutting costs, and keeping your operation moving.
Our expert team delivers safe, reliable onsite solutions, including flange facing, milling, pipe cutting and beveling, line boring, drilling, and more. With a large fleet of ready-to-deploy equipment, we’re prepared to respond fast—24/7.
Trusted For Critical Equipment
We provide precision machining for:
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Exchangers
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Flange surfaces
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Pump bases & pumps
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Gearboxes
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Compressors
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Turbines
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And more
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