3.000" OD 16ga Butt-Weld 45° Elbow - (2WK) - Polished OD/ID - 316L Stainless

316L STAINLESS BUTT-WELD 45° ELBOW (2WK) FOR MARINE EXHAUST & SANITARY SYSTEMS

PNW Sanitary 316L Butt-Weld 45° Elbows are built for applications where corrosion resistance matters most. The molybdenum in 316L gives it substantially better resistance to chlorides and saltwater than 304 stainless, making these elbows a natural fit for marine exhaust systems and any fabrication exposed to salt spray, seawater, or condensing exhaust gases. The low-carbon "L" grade limits carbide precipitation in the weld zone, helping each joint hold its corrosion resistance after welding.

MARINE EXHAUST APPLICATIONS

Raw-water cooled exhaust systems create hot, wet, chloride-rich conditions that cause pitting and crevice corrosion in lesser alloys. 316L butt-weld elbows let you route a complete 316L exhaust through tight engine rooms and transoms without mixing alloys. Typical uses include:

• Exhaust risers, elbows, and direction changes in wet exhaust systems
• Routing around stringers, bulkheads, and engine room obstructions
• Marine generator exhaust
• Dry exhaust stacks and topside fabrication exposed to salt spray

SANITARY APPLICATIONS

These elbows are 3-A Certified and polished to a 32Ra sanitary finish on both ID and OD. They provide smooth, permanent direction changes in CIP systems, product transfer lines, and high-purity process piping for food, beverage, brewing, dairy, and pharmaceutical applications, and are compatible with leading sanitary brands.

FEATURES:

• 316L Stainless Steel (low-carbon, molybdenum-bearing)
• Greater resistance to saltwater and chloride corrosion than 304
• 3-A Certified; polished OD & ID (32Ra)
• Butt-weld ends sized to match standard OD tube
• Capped and cleaned for sanitary protection

QUALITY & MATERIAL CHECK: All PNW Sanitary fittings undergo in-house Positive Material Identification (PMI) with a SciAps X-550 handheld XRF spectrometer to confirm alloy chemistry and support traceability.

FABRICATION TIPS: For the best corrosion resistance in marine service, weld with 316L filler and back-purge with argon to protect the inside of the weld. Removing heat tint and passivating finished welds helps restore the protective surface layer.

BUILD A COMPLETE 316L SYSTEM: Pair these elbows with our 316L Stainless Tube, 316L Transition Reducers, and 316L Butt-Weld Tees.

LOOKING FOR SANITARY FITTINGS? This elbow is also available on our sister site, PNW Sanitary, along with a full line of sanitary fittings, butt-weld elbows, gaskets, and 316L sanitary tube.

CROSS-REFERENCE