Duplex 2205 Stainless Steel 3D Elbow

The Duplex 2205 Stainless Steel 3D Elbow is a butt-weld fitting for changing the direction of process piping. Its centerline radius is approximately three times the pipe outside diameter, providing a longer directional transition than a 1.5D elbow.

Duplex 2205 is commonly identified as UNS S31803, UNS S32205, and EN 1.4462. The duplex structure combines austenitic and ferritic phases, giving the material a combination of corrosion resistance and mechanical strength.

The elbow can be specified by pipe size, outside diameter, wall thickness, bend angle, radius, end preparation, surface condition, and dimensional standard.

3D Bend Radius
The approximately 3D centerline radius provides a longer bend geometry for piping layouts requiring a gradual directional change.

2205 Duplex Grade
Duplex 2205 contains chromium, nickel, molybdenum, and nitrogen. Typical composition values are approximately 22.4% Cr, 5.7% Ni, 3.1% Mo, and 0.17% N.

Butt-Weld Connection
The ends are prepared for butt welding to compatible pipe. Bevel geometry and end dimensions can follow the specified piping standard or approved drawing.

Heavy-Wall Production
Production records include 2205 large-diameter and ultra-thick-wall elbows, supporting dimensional requirements beyond standard light-wall configurations.

Corrosion Resistance
Duplex 2205 offers resistance to uniform corrosion, pitting, crevice corrosion, and stress corrosion cracking. Material selection should be matched to the process medium, chloride level, temperature, and operating conditions.

Mechanical Strength
Typical minimum mechanical values for S32205 include approximately 450 MPa yield strength, 655 MPa tensile strength, and 25% elongation for the referenced product form.

Grade Identification
S31803 and S32205 are commonly associated with 2205 duplex stainless steel. The required designation should be stated on the purchase specification to avoid material-grade ambiguity.

Pipe Size
NPS or DN can be specified according to the connected piping system.

Wall Thickness
Wall thickness may be defined by schedule or by millimeter dimension. Heavy-wall requirements should include the required outside diameter and finished wall thickness.

Bend Angle
45° and 90° are common configurations. Other angles can be produced from an approved dimensional drawing.

End Preparation
Outside diameter, bevel angle, root face, end-to-end dimension, and end alignment can be controlled against the required specification.

Chemical Processing
Used for selected process lines handling corrosive fluids where duplex stainless steel is specified for the service conditions.

Oil and Gas
Applied in process, transfer, and utility piping where the project specification calls for 2205 duplex stainless steel.

Marine Systems
Suitable for selected piping systems exposed to seawater or chloride-containing environments when the operating conditions match the material grade.

Water Treatment
Used in desalination, water treatment, and industrial fluid systems requiring duplex stainless steel components.

Material Identification
Incoming pipe or tube material is identified by grade, dimensions, and heat number before processing.

Forming
The workpiece is formed to the required 3D radius and bend angle using the applicable manufacturing route.

End Machining
Ends are cut and beveled to the specified outside diameter, bevel geometry, and end-to-end dimensions.

Surface Processing
Pickling, blasting, or other specified surface treatment can be applied according to the required finish.

Final Inspection
Finished elbows are checked for material identification, wall thickness, key dimensions, surface condition, and end geometry before release.

Material Verification
Spectrometer testing is available for material identification. Heat numbers can be matched with material documentation when traceability is specified.

Dimensional Inspection
Inspection covers critical dimensions such as outside diameter, wall thickness, bend radius, center-to-end dimensions, and end alignment.

Quality Management
Production operates under an ISO 9001 quality management system.

Production Records
Material, production, and inspection records can be maintained according to the documentation requirements defined for the order.

Provide the following information when requesting a quotation:
● Material grade: S31803 or S32205
● Nominal size: NPS or DN
● Bend angle: 45° or 90°
● Radius: 3D
● Wall thickness or schedule
● Outside diameter
● End-to-end dimensions
● Butt-weld bevel requirements
● Applicable dimensional standard
● Surface finish
● Inspection requirements
● Material documentation
● Quantity
● Drawing, when available
A complete specification allows dimensions, material, manufacturing route, and inspection requirements to be reviewed before production.

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