SS 304 WNRF Flanges (Weld Neck Raised Face Flanges) feature a tapered hub that connects the flange to the pipe through a butt weld. Made from Type 304 stainless steel (UNS S30400), they offer good weldability, formability and resistance to many atmospheric and mildly corrosive environments.
Metalloy Steel supplies SS 304 Weld Neck Raised Face Flanges for chemical processing, water treatment, food production and industrial piping systems. Their butt-weld design supports reliable pipe connections in applications requiring proper alignment and stress distribution. Contact us with your specifications to enquire about availability and pricing from an SS 304 WNRF Flanges Supplier.
| Parameter | Specifications |
|---|---|
| Product Name | SS 304 WNRF Flanges |
| Flange Type | Weld Neck Raised Face |
| Material Grade | Stainless Steel 304 |
| UNS Designation | S30400 |
| Forging Material Specification | ASTM A182 / ASME SA182, Grade F304 |
| Low-Carbon Variant | F304L |
| Dimensional Standards | ASME B16.5; ASME B16.47 |
| Other Standards | EN 1092-1, DIN and other specified standards |
| Nominal Size | ½ inch (15 NB) to 48 inches (1200 NB) |
| Pressure Class | ASME Class 150, 300, 600, 900, 1500 and 2500, where applicable |
| Facing | Raised Face (RF) |
| Connection | Butt-welded to the matching pipe |
| Material Identification | Type 304 stainless steel, UNS S30400 |
| Standard | UNS | Werkstoff Nr. | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| Equivalent Designation | S30400 | 1.4301 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18-09 | X5CrNi18-10 |
| Element | Composition (% by Weight) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 0.75 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 18.00–20.00 |
| Nickel (Ni) | 8.00–10.50 |
| Iron (Fe) | Balance |
| Property | Value |
|---|---|
| Density | 7.93 g/cm³ |
| Melting Range | Approx. 1400–1450°C |
| Tensile Strength | Approx. 515 MPa (75,000 psi) min. |
| Yield Strength (0.2% Offset) | Approx. 205 MPa (30,000 psi) min. |
The weld neck provides a gradual transition between the flange body and pipe, supporting stress distribution when the joint is correctly designed and installed.
The flange connects directly to the matching pipe through a butt weld, making it suitable for piping designs that specify this connection method.
Bore, wall thickness, flange dimensions and facing can be selected to match the applicable piping design and mating components.
Type 304 supports conventional machining and welding practices when suitable procedures and compatible consumables are used.
Chromium in the alloy provides resistance to atmospheric corrosion and many mildly corrosive service environments.
Buyers can define the flange standard, pressure class, nominal size, material grade and inspection requirements to align procurement with project documentation.
| Industry | Applications |
|---|---|
| Chemical Processing | Compatible process lines, transfer piping and equipment connections |
| Food & Beverage | Utility piping and process connections where material and surface requirements are met |
| Pharmaceutical Manufacturing | Utility systems and compatible process-equipment connections |
| Water Treatment | Water distribution, filtration and treatment-system piping |
| HVAC & Building Services | Chilled-water systems, utility piping and equipment connections |
| General Manufacturing | Pump assemblies, tanks, skids and industrial piping networks |
Metalloy Steel can discuss documentation and inspection requirements for SS 304 WNRF Flanges, subject to availability and the agreed purchase specification.
EN 10204 Type 3.1 documentation, where available and agreed.
Review of material certificates or testing as specified.
Applicable tensile and other mechanical tests according to the governing material specification.
Verification of flange dimensions, hub, bore, bolt holes and facing against the specified standard.
Can be discussed when requested and confirmed before supply.
Where required by the purchase specification and applicable to the product.
Generally applicable to the assembled piping system or specified test arrangement, rather than automatically required for every loose flange.
Can be discussed when specified and confirmed before the order is finalised.
SS 304 WNRF Flanges are Weld Neck Raised Face flanges made from Type 304 stainless steel. They feature a tapered hub and are generally connected to the pipe using a butt weld.
WNRF flanges have a tapered neck and are typically butt-welded to the pipe. SORF flanges fit over the pipe and are generally secured using fillet welds.
ASTM A182/ASME SA182 Grade F304 is commonly specified for forged stainless steel flanges. Dimensional requirements depend on the selected standard, such as ASME B16.5.
Type 304 resists atmospheric corrosion and many mildly corrosive environments. More aggressive chloride-bearing or chemical services may require a different grade after engineering assessment.
Metalloy Steel serves buyers looking for an SS 304 WNRF Flanges Supplier and Stockist in India. Share your required dimensions, pressure class, applicable standard, quantity and documentation requirements to enquire about availability and obtain a quotation.
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