Meehanite,CHS Corrosion Resisting Cast Iron Flange

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." -:- For detailed product information, please contact sales. -: Meehanite CHS Corrosion Resisting Cast Iron Flange Product Information -:- For detailed product information, please contact sales. -: Meehanite CHS Corrosion Resisting Cast Iron Flange Synonyms -:- For detailed product information, please contact sales. -:

Meehanite CHS Corrosion Resisting Cast Iron Product Information -:- For detailed product information, please contact sales. -: ## **Meehanite CHS Series: Corrosion and Heat Resisting Austenitic Cast Iron** ### **1. Product Overview** Meehanite CHS represents a specialized category of **high-nickel austenitic cast iron** engineered for applications requiring simultaneous resistance to both **corrosive environments and elevated temperatures**. The "CHS" designation stands for **Corrosion and Heat Resistant**, indicating its dual-purpose capability in challenging industrial applications where standard materials would fail. Unlike standard heat-resistant or corrosion-resistant grades, CHS combines an austenitic nickel-rich matrix with strategic alloying to deliver exceptional performance in environments involving **oxidizing/reducing atmospheres, thermal cycling, and chemical attack**. This material bridges the gap between standard Ni-Resist alloys and high-nickel superalloys, offering a cost-effective solution for applications where both chemical resistance and thermal stability are critical requirements. --- ### **2. Chemical Composition** Meehanite CHS alloys feature carefully balanced austenitic compositions with enhanced alloying for dual resistance: #### **Primary Alloy System (Typical Range):** - **Nickel (Ni):** 18–22% (Primary austenite stabilizer and corrosion enhancer) - **Chromium (Cr):** 2.5–4.5% (Key element for both high-temperature oxidation resistance and corrosion passivation) - **Silicon (Si):** 1.8–3.0% (Enhances oxidation resistance and matrix stability) - **Carbon (C):** 2.5–3.2% (Optimized for strength and castability) - **Manganese (Mn):** 0.5–1.5% (Deoxidizer and austenite stabilizer) #### **Enhanced Corrosion-Resisting Variants (CHS-CR Series):** - **Molybdenum (Mo):** 1.0–3.0% (Added for chloride resistance and reducing acid performance) - **Copper (Cu):** 2.0–4.0% (Improves sulfuric acid resistance and castability) - **Niobium (Nb):** 0.5–1.5% (Carbide stabilizer for improved creep resistance) #### **Microstructural Characteristics:** - **Matrix:** Fully austenitic with controlled carbide precipitation - **Graphite Structure:** Type D (interdendritic) flake graphite or spheroidal graphite variants - **Carbide Distribution:** Fine, dispersed chromium carbides in austenitic matrix - **Passive Layer:** Complex Cr₂O₃-SiO₂-NiO surface oxide formation --- ### **3. Physical & Mechanical Properties** #### **Physical Properties:** - **Density:** 7.2–7.5 g/cm³ - **Melting Range:** 1150–1250°C (2100–2280°F) - **Thermal Conductivity:** 12–18 W/m·K (20–400°C range) - **Specific Heat:** 0.46–0.50 kJ/kg·K - **Thermal Expansion Coefficient:** 15–18 × 10⁻⁶/°C (20–500°C) - **Electrical Resistivity:** 90–110 μΩ·cm #### **Mechanical Properties (Room Temperature):** - **Tensile Strength:** 240–380 MPa (Flake graphite) - **Tensile Strength:** 380–480 MPa (Spheroidal graphite variants) - **Yield Strength (0.2%):** 170–280 MPa (Flake) - **Yield Strength (0.2%):** 250–320 MPa (Spheroidal) - **Elongation:** 3–8% (Flake graphite) - **Elongation:** 10–20% (Spheroidal graphite) - **Hardness:** 150–220 HB - **Modulus of Elasticity:** 110–140 GPa - **Fatigue Strength:** 100–140 MPa (10⁷ cycles) #### **Elevated Temperature Properties:** - **Maximum Service Temperature:** 750–850°C (1380–1560°F) continuous - **Short-Term Exposure:** Up to 900°C (1650°F) - **Creep Strength:** 35–50 MPa at 600°C for 100,000 hours rupture - **Oxidation Resistance:** Excellent scaling resistance up to 850°C - **Thermal Fatigue Resistance:** Superior to ferritic grades due to austenitic structure #### **Corrosion Performance:** - **Oxidizing Acids:** Excellent resistance to nitric, chromic acids - **Reducing Acids:** Good resistance to sulfuric, phosphoric acids (enhanced with Cu/Mo) - **Chloride Solutions:** Good resistance to pitting and stress corrosion cracking - **Alkaline Media:** Excellent resistance to most alkaline solutions - **Atmospheric Corrosion:** Superior performance in industrial and marine atmospheres --- ### **4. Product Applications** #### **Chemical Processing with Thermal Requirements:** - **Heat Exchanger Components:** Tube sheets, baffles, and headers in corrosive service - **Reactor Vessels:** Jacketed reactors and liners for exothermic processes - **Distillation Columns:** Trays, supports, and internal components #### **Energy & Power Generation:** - **Waste Heat Recovery Systems:** Economizers, recuperators in corrosive flue gas - **Biomass & Waste Incineration:** Grate bars, heat exchanger tubes, ash handling - **Geothermal Systems:** Brine pumps, valves, and heat exchanger parts #### **Petrochemical Industry:** - **Catalytic Cracking Units:** Regenerator cyclones, standpipes, valve components - **Reformer Furnaces:** Support grids, hangers, and internal fixtures - **Sulfur Recovery Units:** Condensers, reheaters, and transfer lines #### **Pulp & Paper Industry:** - **Recovery Boiler Components:** Smelt spouts, air ports, floor tubes - **Chemical Recovery Systems:** Evaporator bodies, concentrators - **Digester Systems:** Chip feeders, circulation piping #### **Marine & Offshore:** - **Exhaust Systems:** Turbocharger housings, manifold components - **Seawater Cooling:** Pump casings, valve bodies in heated service - **Desalination:** Brine heater components, flash chamber internals --- ### **5. International & Relevant Standards** #### **Material Specifications:** - **ASTM A436 Type 2:** *Austenitic Gray Iron Castings* (18–22% Ni, 1.5–2.5% Cr) - **ASTM A439 D-2M:** *Austenitic Ductile Iron Castings* (Mo-containing variant) - **EN 13835 EN-GJSA-XNiCr20-2:** *Austenitic spheroidal graphite cast iron* - **ISO 2892:** *Austenitic cast irons — Classification* - **JIS G5504 NRS 2:** *Ni-Resist cast iron type 2* #### **Application Standards:** - **API 610/ISO 13709:** *Centrifugal pumps for petroleum industries* - **ASME Section VIII Division 1:** *Pressure vessel construction* - **ISO 5755:** *Founding — Specification of requirements for design* - **MSS SP-85:** *Cast iron globe and angle valves* #### **Testing & Certification Standards:** - **ASTM A247:** *Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings* - **ASTM E8/E8M:** *Standard Test Methods for Tension Testing of Metallic Materials* - **ISO 6892-1:** *Metallic materials — Tensile testing* - **NACE MR0175/ISO 15156:** *Materials for use in H₂S-containing environments* --- ### **6. Technical Advantages & Considerations** #### **Key Advantages:** 1. **Dual Resistance:** Combined corrosion and heat resistance in one material 2. **Dimensional Stability:** Low growth and distortion at elevated temperatures 3. **Thermal Fatigue Resistance:** Excellent performance in cyclic thermal service 4. **Cost Efficiency:** More economical than high-nickel alloys for many applications 5. **Castability:** Good fluidity and dimensional accuracy in complex castings #### **Design Considerations:** - **Thermal Expansion:** High expansion coefficient requires design accommodation - **Machinability:** Fair to good with proper tooling and techniques - **Weldability:** Limited; specialized procedures required - **Impact Strength:** Moderate at room temperature, decreases at cryogenic temperatures - **Graphite Morphology Selection:** Choice between flake (better thermal conductivity) and spheroidal (better mechanical properties) #### **Material Selection Guidelines:** 1. **Temperature Range:** Optimal performance between 400–800°C 2. **Corrosive Media:** Verify compatibility with specific process chemicals 3. **Mechanical Loads:** Consider spheroidal graphite variants for higher strength requirements 4. **Thermal Cycling:** Austenitic structure provides excellent fatigue resistance 5. **Economic Factors:** Balance initial cost against total life cycle cost --- ### **7. Comparative Performance Analysis** **vs. Standard Ni-Resist (Type 1):** - Higher chromium content for improved oxidation resistance - Better mechanical properties at elevated temperatures - Enhanced corrosion resistance in chloride environments **vs. Heat-Resistant Cast Steels:** - Superior corrosion resistance in many chemical environments - Better castability and lower cost - Higher thermal expansion requires different design approach **vs. High-Nickel Alloys (Hastelloy, Inconel):** - Lower initial material cost (40–60% of nickel alloys) - Adequate performance for many moderate-corrosion applications - More limited temperature capability in reducing atmospheres --- ### **8. Manufacturing & Quality Assurance** #### **Foundry Practice Requirements:** - Controlled melting and pouring temperatures - Proper inoculation for graphite structure control - Heat treatment for carbide stabilization when required - Non-destructive testing (radiography, ultrasonic) for critical applications #### **Quality Control Standards:** - Chemical composition verification (spectroscopic analysis) - Mechanical testing per ASTM/ISO standards - Microstructural evaluation (graphite form, matrix structure) - Dimensional inspection to drawing tolerances - Pressure testing when required for sealed components --- ### **9. Conclusion** Meehanite CHS represents a sophisticated engineering material that successfully addresses the challenging requirements of applications where both corrosion and elevated temperatures are present. By combining the established benefits of austenitic cast iron with enhanced alloying for dual resistance, this material family offers a practical and economical solution for numerous industrial applications. While not suitable for all extreme environments, CHS provides an excellent balance of performance and cost for many demanding applications in chemical processing, energy generation, and industrial manufacturing. For optimal application success, collaboration with experienced foundry engineers during the design phase is strongly recommended to select the appropriate variant and ensure proper manufacturing practices. -:- For detailed product information, please contact sales. -: Meehanite CHS Corrosion Resisting Cast Iron Specification Dimensions Size： Diameter 20-1000 mm Length <6638 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Meehanite CHS Corrosion Resisting Cast Iron Properties -:- For detailed product information, please contact sales. -:

Applications of Meehanite CHS Corrosion Resisting Cast Iron Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Meehanite CHS Corrosion Resisting Cast Iron Flange -:- For detailed product information, please contact sales. -:

Packing of Meehanite CHS Corrosion Resisting Cast Iron Flange -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: 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 3109 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