1,We Manufacturing processes are primarily classified into four types:
1:Forging,
2:Casting,
3:Cutting,
4:Rolling.
2,We can manufacture in accordance with these standards.
Standards:
GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards).
Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others.
The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160.
The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500.
Flange Classification
1. **According to Chemical Industry Standards:** Flanges are classified as follows:
Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)).
2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows:
Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation).
3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows:
Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange.
4. **According to Connection Method/Type:** Flanges are classified as follows:
Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc.
5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges.
6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges.
A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts."
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InduSteel Flange URANUS® 47N+ 25 Cr Super Duplex Stainless Steel Flange with PREN = 40 Product Information
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InduSteel Flange URANUS® 47N+ 25 Cr Super Duplex Stainless Steel Flange with PREN = 40 Synonyms
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Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 Product Information
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**Product Name:** Industeel URANUS® 47N+ (25% Cr Super Duplex Stainless Steel, PREN = 40)
**Introduction:**
Industeel URANUS® 47N+ is a **super duplex stainless steel** representing the pinnacle of the URANUS® duplex family. Engineered for extreme service, it combines a high-chromium alloy base with optimized nitrogen content to achieve an unparalleled balance of **exceptional strength and extraordinary corrosion resistance**. With a guaranteed Pitting Resistance Equivalent Number (PREN) of ≥ 40, it is designed to operate reliably in the most aggressive environments where standard duplex (e.g., 2205) and even high-grade austenitic steels reach their limits. It offers a cost-effective alternative to nickel-based alloys for numerous demanding applications.
**Key Features:**
* **Extreme Corrosion Resistance:** Exceptionally high resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in high-chloride, acidic, and sour (H₂S-containing) environments, as quantified by its PREN ≥ 40.
* **Very High Mechanical Strength:** Delivers superior yield and tensile strength (nearly triple that of 316L), allowing for significant weight reduction and design optimization in high-pressure systems.
* **Excellent Erosion-Corrosion Resistance:** The combination of high hardness and inherent corrosion resistance makes it ideal for applications involving high flow rates, sand, or particulate matter.
* **Optimized for Critical Service:** Manufactured under stringent controls to ensure a stable austenite-ferrite microstructure, minimizing the risk of harmful intermetallic phases for maximum reliability in welded fabrications.
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**1. Chemical Composition (Typical Weight % - Industeel Specification)**
The composition is precisely balanced to maximize performance while maintaining structural stability.
| Element | Content (%) | Element | Content (%) |
| :------------- | :------------ | :------------- | :---------- |
| Chromium (Cr) | 24.5 - 25.5 | Nickel (Ni) | 6.5 - 8.0 |
| Molybdenum (Mo)| 3.0 - 4.0 | Nitrogen (N) | 0.20 - 0.30 |
| Manganese (Mn) | ≤ 1.5 | Copper (Cu) | 0.50 - 1.50 |
| Silicon (Si) | ≤ 0.50 | Carbon (C) | ≤ 0.030 |
| Phosphorus (P) | ≤ 0.030 | Sulfur (S) | ≤ 0.015 |
| Tungsten (W) | 0.50 - 1.00 | | |
| **Iron (Fe)** | **Balance** | | |
**Key Alloying Note:** The addition of **Tungsten (W)** further enhances pitting and crevice corrosion resistance, particularly in acidic chloride environments.
**PREN Calculation:** PREN = %Cr + 3.3(%Mo + 0.5%W) + 16(%N) ≥ **40**
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**2. Physical & Mechanical Properties (Typical at Room Temperature - Solution Annealed)**
| Property | Value / Range |
| :-------------------------------------------- | :-------------------------------- |
| Density | 7.80 g/cm³ |
| Melting Range | 1400 - 1450 °C |
| Thermal Conductivity (20°C) | 17 W/m·K |
| Coefficient of Thermal Expansion (20-100°C) | 12.5 x 10⁻⁶ /K |
| Modulus of Elasticity | 200 GPa |
| **Tensile Strength (Rm)** | **800 - 1000 MPa** |
| **Yield Strength (Rp0.2)** | **≥ 550 MPa** |
| **Elongation (A in 50mm)** | **≥ 25 %** |
| Hardness (Brinell) | 270 - 320 HBW |
| **Impact Toughness (Charpy V-notch, min.)** | **≥ 80 J at -40°C** |
| **Critical Pitting Temperature (CPT) - ASTM G48** | **Typically ≥ 65°C** |
| **Critical Crevice Temperature (CCT) - ASTM G48** | **Typically ≥ 40°C** |
| Maximum Recommended Service Temperature | ≈ 250°C (to avoid embrittlement) |
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**3. Product Forms & Applications**
**Available Product Forms:**
* Heavy Plate and Sheet
* Seamless and Welded Pipe & Tube
* Bar, Wire, and Forging Blooms
* Custom Forgings (for critical components)
**Primary Applications (Extreme Service):**
URANUS® 47N+ is specified for the most corrosive and demanding applications across industries:
* **Oil & Gas - Deepwater/Subsea:** Christmas trees, manifolds, flowlines, risers, and umbilicals in cold, high-pressure seawater with cathodic protection.
* **Oil & Gas - Severe Sour Service:** Downhole tubing, wellhead components, and process equipment in fields with very high H₂S, CO₂, and chloride content.
* **Chemical & Petrochemical Processing:** Reactors, columns, and heat exchangers handling concentrated sulfuric and phosphoric acids, chloride salts, and aggressive organic chemicals.
* **Marine & Offshore:** Seawater piping systems, high-pressure pumps, heat exchangers, and shafts in naval and commercial vessels.
* **Desalination:** High-pressure pumps, energy recovery devices, and RO membranes in seawater reverse osmosis (SWRO) plants.
* **Pulp & Paper:** Digester pre-heaters and liquor heaters in kraft pulp mills.
* **Pollution Control:** Scrubbers, ducting, and fans in highly corrosive flue gas desulfurization (FGD) systems.
* **Aquaculture:** Cage systems and components in exposed marine environments.
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**4. International Standards & Approvals**
URANUS® 47N+ corresponds to high-grade super duplex standard specifications.
| Standard Type | Standard Number & Designation | Notes |
| :------------------ | :--------------------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------- |
| **Unified Numbering System (UNS)** | **S32750** (Primary equivalent - 25Cr Super Duplex) | The most common global standard for this alloy class (e.g., SAF 2507®). |
| **EN / EURONORM (Europe)** | **1.4410** (Common material number for S32750) | Standard European designation for 25% Cr super duplex. |
| **ASTM (USA)** | **ASTM A240** S32750 (Plate/Sheet)
**ASTM A182** F53 (Forgings)
**ASTM A789/A790** S32750 (Pipe & Tube) | The key ASTM procurement standards. |
| **NACE MR0175 / ISO 15156** | **Fully Compliant** | Approved for sour service under strict hardness control (typically ≤ 36 HRC). Requires solution annealing and quenching. |
| **Specialized Approvals** | **DNV, ABS, Lloyds** for offshore and marine applications.
**PED 2014/68/EU** (Pressure Equipment Directive) compliance. | Often supplied with project-specific certifications. |
| **Key Procurement Specification** | **Proprietary Industeel URANUS® 47N+ Technical Datasheet** | The definitive source for its enhanced guaranteed properties beyond minimum standards. |
**Critical Procurement & Fabrication Note:**
URANUS® 47N+ is a **high-performance alloy requiring expert handling**. Procurement must specify "Industeel URANUS® 47N+" alongside UNS S32750 to ensure the receipt of material with the enhanced characteristics. The **Manufacturer's Test Certificate is critical** and must include heat-specific data: full chemical analysis (for PREN calculation), ferrite content (aim: 35-55%), phase balance verification, and typically results from pitting corrosion tests (CPT/CCT). Welding is a critical operation and **must** use **over-matching super duplex or nickel-based filler metals** (e.g., ER2594 or Ni-based 625) under strictly controlled procedures to maintain corrosion resistance and toughness in the weld zone. Post-weld heat treatment is generally not recommended.
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Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 Specification
Dimensions
Size：
Diameter 20-1000 mm Length <7276 mm
Size:We can customized as required
Standard：
Per your request or drawing
We can customized as required
Properties（Theoretical）
Chemical Composition
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Industeel URANUS® 47N+ 25 Cr Super Duplex Stainless Steel with PREN = 40 Properties
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Applications of InduSteel Flange URANUS® 47N+ 25 Cr Super Duplex Stainless Steel Flange with PREN = 40
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Chemical Identifiers InduSteel Flange URANUS® 47N+ 25 Cr Super Duplex Stainless Steel Flange with PREN = 40
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Packing of InduSteel Flange URANUS® 47N+ 25 Cr Super Duplex Stainless Steel Flange with PREN = 40
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Standard Packing:
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Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3747 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition
