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Weld Neck · Slip-On · Blind · Socket Weld · Orifice · Lap Joint · RTJ — All types in Duplex, Super Duplex & Alloy grades

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Weld Neck Flange - Ragnar Metals
Weld Neck Flange

Weld Neck Flange (WNRF)

Weld neck flanges feature a long tapered hub that provides the strongest connection for high-pressure and high-temperature applications. The bore matches the pipe ID, reducing turbulence. Used in oil & gas, chemical and power plant piping.

Duplex 2205 (UNS S32205) Super Duplex 32750 Super Duplex S32760 SS 304 / 316 / 310 Inconel 625 Hastelloy C276 Monel 400 Titanium Gr.2
StandardsASME B16.5, ASME B16.47 (Series A/B), DIN 2633
Size Range½" – 60" (Class 150 – 2500)
Face TypesRaised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ)
Material SpecsASTM A182 F51 (Duplex), F53 (Super Duplex)
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Slip-On Flange - Ragnar Metals
Slip-On Flange

Slip-On Flange (SORF)

Slip-on flanges slide over the pipe and are welded both inside and outside. They are easier to align and are suitable for moderate-pressure applications. Cost-effective for lower-pressure chemical and water treatment piping.

Duplex 2205 Super Duplex 32750 SS 304L / 316L Inconel 625 Hastelloy C276
StandardsASME B16.5, ASME B16.47
Size Range½" – 48" (Class 150 – 900)
Face TypesRaised Face (RF), Flat Face (FF)
ApplicationsWater Treatment, Chemical, Marine, HVAC
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Blind Flange - Ragnar Metals
Blind Flange

Blind Flange (BLRF)

Blind flanges are solid discs used to block off a pipeline or pressure vessel opening for maintenance, testing or permanent closure. Available in all pressure classes and material grades with raised face, flat face and RTJ seating.

Duplex 2205 Super Duplex 32750 SS 304 / 316 Inconel 625 Hastelloy C276 Monel 400
StandardsASME B16.5, ASME B16.47 Series A/B
Size Range½" – 60" (Class 150 – 2500)
Face TypesRF, FF, RTJ
ApplicationsIsolation, Testing, Pressure Vessel Closure
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Socket Weld Flange - Ragnar Metals
Socket Weld Flange

Socket Weld Flange (SWRF)

Socket weld flanges are used for small-diameter, high-pressure piping where the pipe is inserted into the socket and fillet welded. Provides a smooth bore and is excellent for high-pressure steam, hydraulic and chemical lines.

Duplex 2205 Super Duplex 32750 SS 304 / 316 Inconel 625
StandardsASME B16.5
Size Range½" – 4" (Class 150 – 2500)
ApplicationsHigh-Pressure Steam, Hydraulic, Chemical Lines
BoreSmooth bore matching pipe ID
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Threaded Flange - Ragnar Metals
Threaded Flange

Threaded Flange (THRF)

Threaded flanges connect to pipe with NPT or BSP threads without welding — making them ideal for hazardous or explosive environments where welding is not permitted. Used in fuel systems, gas lines and instrumentation.

Duplex 2205 Super Duplex 32750 SS 304 / 316 Alloy Steel A105
StandardsASME B16.5, ASME B1.20.1 (NPT)
Size Range½" – 4" (Class 150 – 2500)
Thread TypesNPT (National Pipe Thread), BSPP, BSPT
ApplicationsGas Lines, Fuel Systems, Instrumentation
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Lap Joint Flange - Ragnar Metals
Lap Joint Flange

Lap Joint Flange (LJRF)

Lap joint flanges are used with stub ends for easy rotation to align bolt holes and quick disassembly. The flange itself does not contact the fluid — only the stub end does — making it economical in exotic materials by using a carbon steel backing flange.

Duplex 2205 Super Duplex 32750 SS 304 / 316 Inconel 625
StandardsASME B16.5
Size Range½" – 24" (Class 150 – 2500)
Used WithStub Ends (ASME B16.9, MSS SP-43)
ApplicationsRotating/Alignment, Cryogenic, Dissimilar Material Joints
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Orifice Flange - Ragnar Metals
Orifice Flange

Orifice Flange

Orifice flanges are used in pairs with an orifice plate between them to measure flow rate in pipelines. They include pressure tappings (jack screws) on the flange face. Available in weld neck and slip-on types in duplex and alloy grades.

Duplex 2205 Super Duplex 32750 SS 304 / 316 Inconel 625
StandardsASME B16.36, ASME B16.5
Size Range1" – 24" (Class 150 – 2500)
TypesWeld Neck (WNORF), Slip-On (SOORF)
ApplicationsFlow Measurement, Process Control
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RTJ Flange - Ragnar Metals
RTJ Flange

RTJ Flange (Ring Type Joint)

Ring Type Joint (RTJ) flanges feature a groove machined into the flange face that accepts a metal ring gasket (oval or octagonal ring). Used in high-pressure and high-temperature applications in oil & gas, wellhead and subsea service.

Duplex 2205 Super Duplex 32750 SS 316L Inconel 625 Alloy Steel F11/F22
StandardsASME B16.5, ASME B16.20 (Ring Gaskets)
Ring TypesOval Ring, Octagonal Ring (R/RX/BX series)
Pressure ClassClass 600 – 2500
ApplicationsWellhead, Subsea, High-Pressure Gas Lines
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Specialty Flanges

Additional flange types available in Duplex, Super Duplex and Alloy grades

Long Weld Neck Flange

Extended neck for radiographic inspection access. Used in pressure vessels and heat exchangers.

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Reducing Flange

Connects two different pipe diameters. Eliminates need for a separate reducer fitting.

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Expander Flange

Integral eccentric reducer + flange. Transitions from smaller pipe to larger bore flange in one piece.

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Plate Flange

Flat plate flange for non-standard pressure applications and equipment connections.

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Nipple Flange

Integral short-length nipple + flange. Compact branch connection for vessels and headers.

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Spectacle Blind Flange

Figure-8 blind for easy line isolation. One end blind plate, one end spacer ring.

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Duplex 2205 Flanges — By Type
Duplex 2205 Weld Neck Flange
Duplex 2205 Slip-On Flange
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Duplex 2205 Socket Weld Flange
Duplex 2205 Threaded Flange
Duplex 2205 Lap Joint Flange
Duplex 2205 Orifice Flange
Duplex 2205 RTJ Flange
Duplex 2205 Long Weld Neck
Duplex 2205 Plate Flange
Duplex 2205 Nipple Flange
Duplex 2205 Expander Flange
Duplex 2205 Reducing Flange
Duplex 2205 Spectacle Blind
Duplex 2205 Blind RTJ Flange
Duplex 2205 WN RTJ Flange
Super Duplex S32750 Flanges — By Type
S32750 Weld Neck Flange
S32750 Slip-On Flange
S32750 Blind Flange
S32750 Socket Weld Flange
S32750 Threaded Flange
S32750 Lap Joint Flange
S32750 Orifice Flange
S32750 RTJ Flange
S32750 Long Weld Neck
S32750 Plate Flange
S32750 Nipple Flange
S32750 Expander Flange
S32750 Reducing Flange
S32750 Spectacle Blind
S32750 Blind RTJ Flange
S32750 WN RTJ Flange
By International Standard
ASME B16.5 Duplex Flanges
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ASME B16.47 Duplex Flanges
ASME B16.47 Super Duplex Flanges
ASME B16.47 Series A Flanges
ASME B16.47 Series B Flanges
ASME SA182 Duplex Flanges
ASME SA182 Super Duplex Flanges
ASTM A182 Duplex Flanges
ASTM A182 Super Duplex Flanges
EN 1092-1 Duplex Flanges
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DIN Duplex Flanges
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ISO Super Duplex Flange
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NACE MR0175 Duplex Flange
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Flanges — All Grade, Standard & Country Pages

Duplex 2101, Duplex 2205/S32205, Super Duplex 2507, nickel alloys and copper alloys — ASME B16.5, B16.47, DIN, EN standards with country export pages.

Duplex Steel Flanges
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Grade & Overview
Super Duplex Flanges Super Duplex Exporter SD Flanges — Mfr, Supplier & Exporter Super Duplex SS Flanges Super Duplex 2507 2507 Exporter 2507 Mfr Super Duplex 32750 UNS S32750 UNS S32760 (Zeron 100) UNS S32550 UNS S32950 EN 1.4410 Zeron 100 Flanges UNS S32750 Exporter UNS S32760 Exporter
Standards & Pressure Classes
ASME B16.5 B16.5 Exporter ASME B16.47 B16.47 Exporter B16.48 Spectacle Blind B16.36 Orifice ASME SA182 SA182 Exporter ASTM A182 A182 Exporter EN 1092-1 EN 1092-1 Exporter DIN Super Duplex DIN Exporter JIS Super Duplex GOST Super Duplex Class 150 Class 300 Class 600 Class 900 Class 1500 Class 2500
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ASME B16.5 B16.5 Exporter ASME B16.47 B16.47 Exporter ASME SA182 ASTM A182 DIN Super Duplex DIN Exporter
Super Duplex 2507 — by Country
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We supply ASME B16.5 & B16.47 flanges with ASTM A182 material certification. Custom grades, pressure classes and sizes available. Global delivery.

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