SS 316 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 316 stainless steel (UNS S31600), they contain 2–3% molybdenum, which improves resistance to pitting and crevice corrosion in many chloride-containing environments.
Metalloy Steel supplies SS 316 Weld Neck Raised Face Flanges for chemical processing, marine facilities, water treatment and industrial piping systems. Their weld-neck design supports pipe connections where alignment and stress distribution are important. Contact us with your specifications to enquire about availability and pricing from an SS 316 WNRF Flanges Supplier in India.
| Parameter | Specifications |
|---|---|
| Product Name | SS 316 WNRF Flanges |
| Flange Type | Weld Neck Raised Face |
| UNS Designation | S31600 |
| Forging Material Specification | ASTM A182 / ASME SA182, Grade F316 |
| Dimensional Standards | ASME B16.5; ASME B16.47 |
| Other Standards | EN 1092-1, DIN and specified BS standards |
| Nominal Size | ½ inch (15 NB) to 48 inches (1200 NB) |
| Pressure Class | ASME Class 150, 300, 600, 900, 1500 and 2500 |
| Standard Facing | Raised Face (RF) |
| Other Facing Options | Ring Type Joint (RTJ) |
| Connection | Butt-welded to the matching pipe |
| Material Identification | Type 316 stainless steel, UNS S31600 |
| Standard | SS 316 Equivalent | SS 316L Equivalent |
|---|---|---|
| UNS | S31600 | S31603 |
| Werkstoff Nr. | 1.4401 | 1.4404 |
| JIS | SUS 316 | SUS 316L |
| BS | 316S31 | 316S11 |
| EN | X5CrNiMo17-12-2 | X2CrNiMo17-12-2 |
| AFNOR | Z7CND17-11-02 | Z3CND17-11-02 |
| Element | Composition (% by Weight) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 16.00–18.00 |
| Nickel (Ni) | 10.00–14.00 |
| Molybdenum (Mo) | 2.00–3.00 |
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Range | Approx. 1370–1400°C |
| Tensile Strength | Approx. 515 MPa (75,000 psi) min. |
| Yield Strength (0.2% Offset) | Approx. 205 MPa (30,000 psi) min. |
Molybdenum helps Type 316 resist pitting and crevice corrosion in many chloride-bearing environments better than Type 304.
The gradual transition between the flange body and pipe supports stress distribution when the joint is properly designed and installed.
The weld-neck connection provides a direct pipe joint suited to piping systems designed around butt-welded components.
Type 316 can be welded using suitable procedures and compatible consumables. Appropriate post-weld cleaning helps maintain corrosion performance.
Buyers can define flange dimensions, pressure class, facing and material requirements to match project drawings and piping specifications.
Type 316 is used in selected chemical, coastal and process applications where its corrosion resistance suits the operating environment.
| Industry | Applications |
|---|---|
| Chemical Processing | Transfer lines carrying selected corrosive chemicals, process fluids and chemical solutions |
| Marine and Coastal Facilities | Piping exposed to marine atmospheres or selected chloride-containing fluids, following corrosion assessment |
| Water and Wastewater Treatment | Process-water lines, treatment equipment connections and selected chemical-dosing systems |
| Pharmaceutical and Biotechnology | Process utility and fluid-handling lines where the specified material and surface requirements permit SS 316 |
| Food and Beverage Processing | Product and utility piping connections where stainless steel hygiene and corrosion requirements apply |
| Industrial Equipment and Skids | Connections to pumps, vessels, heat exchangers and other equipment with compatible flange specifications |
Metalloy Steel can discuss documentation and inspection requirements for SS 316 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 applies to the assembled piping system or a specified test arrangement rather than every loose flange.
Can be discussed when specified and confirmed before the order is finalised.
SS 316 WNRF Flanges are Weld Neck Raised Face flanges made from Type 316 stainless steel. They feature a tapered hub and are generally joined to the pipe using a butt weld.
SS 316L has a lower carbon limit than SS 316, helping reduce the risk of sensitisation during welding. The correct grade depends on the specified material standard and service requirements.
ASTM A182/ASME SA182 Grade F316 is commonly specified for forged Type 316 stainless steel flanges. Dimensional requirements depend on the selected standard, such as ASME B16.5.
Metalloy Steel serves buyers looking for an SS 316 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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