Duplex 2205 butt weld fittings are engineered for pipelines that must survive aggressive seawater and chloride-rich service. Manufactured from UNS S31803 duplex stainless steel, this seawater resistant 90 degree butt weld elbow combines high mechanical strength with outstanding resistance to pitting and stress corrosion cracking.

Each duplex 2205 butt weld fittings elbow is formed from seamless or welded pipe, then solution annealed and pickled to restore the balanced austenitic-ferritic microstructure. The result is a 90 degree elbow that delivers roughly twice the yield strength of standard 316L butt weld fittings while remaining fully weldable in the field.

As an experienced butt weld fittings supplier, we machine every duplex 2205 elbow to EN 10253-2 and ASME B16.9 dimensions so that it drops straight into existing spools without rework. Dimensional inspection, PMI testing and hydrostatic testing are performed on each piece before shipment.

Whether you build offshore process lines, desalination trains or marine cooling loops, these seawater resistant butt weld fittings give you a dependable, long-life connection that reduces unplanned downtime and maintenance cost.

• High strength: duplex 2205 provides about twice the yield strength of 316L butt weld fittings
• Superior chloride pitting and crevice corrosion resistance for seawater service
• Solution annealed to restore the ideal 50/50 austenite-ferrite balance
• Dimensionally accurate to EN 10253-2 and ASME B16.9 for trouble-free welding
• 100 percent PMI and hydrostatic testing on every duplex 2205 butt weld fittings elbow
• Full traceability with EN 10204 3.1 mill test certificates

• Offshore oil and gas process piping
• Seawater cooling and desalination systems
• Chemical and petrochemical plants
• Pulp and paper bleach lines
• Marine and shipbuilding pipework

Every Seawater Resistant Butt Weld Fittings is packed in seaworthy wooden cases or pallets with protective end caps. We offer customized marking and labeling, and can consolidate mixed sizes in a single shipment to reduce your freight cost and handling time.

As a Seawater Resistant Butt Weld Fittings manufacturer, we support custom sizes, wall thicknesses and materials, and arrange third party inspection such as SGS, BV or TUV on request. Our engineers review every enquiry and recommend the material, wall thickness and standard that best match your pressure, temperature and corrosion requirements.

Each Seawater Resistant Butt Weld Fittings order is dimensionally inspected against the applicable standard before dispatch, and our quality team retains a sample record that can be re-tested on request. We also welcome factory audits and pre-shipment inspections from overseas buyers, and can supply reference projects and test reports to support your tender documents.