The spec, the fabrication approach, and the measured result. Documented builds in 304L, 316L, and duplex stainless from Oak Harbor, Ohio.
Each case study covers the requirement, how Northern built it, and the outcome the customer measured.
Regional wastewater authority needed a 100-foot 304L stainless trough to replace a failed unit during a planned outage. Straightness was specified within 1/8 inch over the full 100-foot length. The previous fabricator couldn't hold tolerance over the span.
Food & beverage OEM was seeing stainless weld joints fail in the field within months. Previous fabricator had not adjusted joint geometry for the service environment.
Power generation facility needed large-diameter stainless exhaust ductwork to mate to existing in-plant flanges during a scheduled outage, with zero tolerance for forced alignment on site.
A pollution-control OEM needed a large wet electrostatic precipitator built in AL-6XN: a multi-story collecting structure, roughly 17 feet tall, with collector rows stacked one above the next. Each row had to hold straight within 1/8 inch, and the tolerance stacked from the bottom up.
All 72 Ohio-built components assembled in West Hollywood with zero fit-up issues. The project won the 2021 Tekla North America BIM Award for Best Small Project and the 2017 AIA|LA Next LA Honor Award.
A 67-foot, 100-ton 304L stainless steel monocoque with 72 unique multi-ton panels, sharp corners that ruled out press brake forming, and no two faces parallel. As designed, the structure was considered unbuildable.
Every joint passed radiography against the piping-package acceptance criteria, with the welder and procedure stamped on each weld map.
A process-piping program needed full-penetration butt welds that would pass radiography on every joint, in a high-chromium austenitic stainless that punishes inconsistent prep. The variable that defeats full penetration on pipe is fit-up.
Send the drawing. Our engineers review the spec before we quote it.
