ASTM A612 Carbon Steel 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. -: ASTM A612 Carbon Steel Flange Product Information -:- For detailed product information, please contact sales. -: ASTM A612 Carbon Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

ASTM A612 Carbon Steel Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A612 Carbon Steel: High Strength Pressure Vessel Steel Plate** #### **1. Overview** ASTM A612 is a specification for **high-strength carbon steel plates** primarily used in **pressure vessel applications**, particularly for **moderate and lower temperature service**. This steel is designed to provide improved toughness and strength for welded pressure vessels where reliability under pressure is critical. The specification covers plates in the as-rolled or normalized condition, with thicknesses up to 12 inches (300 mm), making it suitable for large pressure containment structures. #### **2. Chemical Composition** The chemical composition is carefully controlled for optimal strength and toughness: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.25 - 0.30 | | Manganese (Mn) | 0.85 - 1.20 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.15 - 0.40 | | Copper (Cu) | 0.35 max (when specified) | **Key Composition Features:** - **Controlled Carbon Range**: Balances strength and weldability - **Enhanced Manganese Content**: Improves strength and hardenability - **Silicon Addition**: Provides deoxidation and strength enhancement - **Low Impurity Levels**: Ensures good toughness properties #### **3. Physical & Mechanical Properties** **Mechanical Properties (Normalized Condition):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 70 - 90 ksi (485 - 620 MPa) | | **Yield Strength** | 45 ksi min (310 MPa min) | | **Elongation in 2 inches** | 23% min | | **Charpy V-Notch Impact** | 15 ft-lb min at -50°F (-45°C) | **Enhanced Performance Characteristics:** - **Good Low-Temperature Toughness**: Suitable for moderate low-temperature service - **Excellent Weldability**: Proper procedures yield sound welds - **Pressure Containment Capability**: Reliable performance under internal pressure - **Stable Mechanical Properties**: Consistent behavior in service conditions **Physical Properties (Typical):** - **Density**: 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity**: 29,000 ksi (200 GPa) - **Poisson's Ratio**: 0.29 - **Coefficient of Thermal Expansion**: 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) - **Thermal Conductivity**: 42.5 W/m·K at 212°F (100°C) #### **4. Product Applications** A612 steel is primarily used in pressure vessel and structural applications: **Pressure Vessel Construction:** - Storage tanks for gases and liquids - Process vessels in chemical plants - Heat exchangers and condensers - Industrial boilers and pressure containers **Power Generation:** - Power plant pressure vessels - Steam drums and headers - Energy storage systems - Power generation equipment **Petrochemical Industry:** - Refinery process vessels - Oil and gas storage tanks - Chemical processing equipment - Petrochemical plant components #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | P295GH | Pressure vessel steel equivalent | | **Europe** | **EN 10028-2** | P295GH | Pressure vessel steel plate | | **Japan** | **JIS G3115** | SV295 | Pressure vessel steel | | **China** | **GB 6654** | 16MnR | Pressure vessel steel plate | **Heat Treatment Options:** | Condition | Tensile Strength | Yield Strength | Impact Properties | |-----------|------------------|----------------|-------------------| | **As-Rolled** | 70-90 ksi | 45 ksi min | Standard | | **Normalized** | 70-90 ksi | 45 ksi min | Enhanced | #### **6. Fabrication & Quality Assurance** **Welding and Fabrication:** - **Pre-heat Requirements**: 200-400°F (95-205°C) depending on thickness - **Post-Weld Heat Treatment**: Often required for stress relief - **Welding Processes**: SMAW, GMAW, SAW with proper procedures - **Consumables**: Low-hydrogen electrodes recommended **Heat Treatment Options:** - **Normalizing**: Improves toughness and uniformity - **Stress Relieving**: Reduces residual stresses - **As-Rolled**: For less demanding applications **Quality Control Requirements:** - **Impact Testing**: Required at specified temperatures - **Tension Tests**: From each heat treatment charge - **Ultrasonic Testing**: Available as supplementary requirement - **Chemical Analysis**: For each heat of steel --- **Technical Advantages:** - **Cost-effective** solution for pressure vessel applications - **Good combination** of strength and toughness - **Reliable performance** in pressure containment - **Established fabrication** history in industry **Design Considerations:** - **ASME Section VIII** design rules applicable - **Minimum design metal temperature** considerations - **Proper joint design** for pressure containment - **Environmental factors** affecting corrosion performance **Service Limitations:** - **Minimum service temperature**: -50°F (-45°C) - **Maximum thickness**: 12 inches (300 mm) - **Not recommended** for severe corrosion service - **Temperature limitations** for long-term service **Disclaimer:** This technical information is for reference purposes only. For pressure vessel applications, consult the latest ASTM A612 specification and applicable ASME Code requirements. Material selection and fabrication must be approved by qualified engineers and comply with all relevant pressure vessel codes and safety regulations. Proper welding procedures and quality control measures are essential for pressure containment applications. -:- For detailed product information, please contact sales. -: ASTM A612 Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4487 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. -: ASTM A612 Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A612 Carbon Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A612 Carbon Steel Flange -:- For detailed product information, please contact sales. -:

Packing of ASTM A612 Carbon Steel 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 958 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