ASTM A139 Steel Flange, grade B

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 A139 Steel Flange, grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A139 Steel Flange, grade B Synonyms -:- For detailed product information, please contact sales. -:

ASTM A139 Steel, grade B Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A139 / A139M Steel, Grade B** --- #### **1. Product Overview** ASTM A139 Grade B is a specification for **electric-fusion-welded (EFW) steel pipe** designed for high-pressure applications requiring enhanced mechanical properties. This grade covers steel pipe of sizes 4 inches (101.6 mm) and larger, manufactured by the electric-fusion welding process. Grade B offers higher strength compared to Grade A, making it suitable for more demanding applications in water transmission, oil and gas pipelines, and other high-pressure systems where increased mechanical strength is required. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A139 / A139M Grade B** | | **API (American Petroleum Institute)** | **API 5L Grade B** (Similar) | | **ISO International Standard** | **ISO 3183** (Equivalent) | | **European Norm (EN)** | **EN 10208-1** | | **Canadian Standards Association** | **CSA Z245.1** | | **German (DIN)** | **DIN 17100** | --- #### **3. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.30 max | | **Manganese (Mn)** | 1.20 max | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.035 max | | **Copper (Cu)** | 0.20 min (when required) | | **Silicon (Si)** | 0.10-0.35 (when required) | | **Iron (Fe)** | Balance | **Key Composition Features:** - **Higher Carbon Content**: Provides increased strength over Grade A - **Enhanced Manganese**: Up to 1.20% for improved strength and toughness - **Controlled Impurities**: Low phosphorus and sulfur for weld integrity - **Optional Silicon**: For deoxidation and strength enhancement - **Copper Option**: Available for better atmospheric corrosion resistance --- #### **4. Mechanical Properties** **Tensile Properties:** - **Tensile Strength**: 414 MPa (60,000 psi) min - **Yield Strength**: 241 MPa (35,000 psi) min - **Elongation in 50 mm (2 in)**: - 30% min (longitudinal strip test) - 20% min (transverse strip test) **Hardness Properties:** - **Maximum Hardness**: 79 HRB typical - **Brinell Hardness**: 143 HBW max --- #### **5. Physical Properties** | Property | Value | |----------|-------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Modulus of Elasticity** | 200 GPa (29,000 ksi) | | **Shear Modulus** | 77 GPa (11,200 ksi) | | **Poisson's Ratio** | 0.29 | | **Thermal Conductivity** | 51.5 W/m·K at 20°C | | **Coefficient of Thermal Expansion** | 11.7 × 10⁻⁶ /K (20-100°C) | | **Specific Heat Capacity** | 470 J/kg·K | | **Electrical Resistivity** | 0.17 μΩ·m | --- #### **6. Product Applications** **High-Pressure Pipeline Applications:** - High-pressure water transmission lines - Oil and gas transmission pipelines - Natural gas distribution systems - High-pressure slurry pipelines - Industrial high-pressure process piping **Critical Infrastructure Applications:** - Municipal high-pressure water systems - Large-scale irrigation projects - Fire protection mains - Hydroelectric penstocks - Water treatment plant piping **Industrial Applications:** - Power plant piping systems - Chemical plant process lines - Mining industry slurry transport - High-pressure compressed air systems - Structural piling and foundation support --- #### **7. Manufacturing & Fabrication** **Manufacturing Process:** - **Electric Fusion Welding (EFW)** - Continuous welding with filler metal addition - Sizes from 4 inches (101.6 mm) to 144 inches (3658 mm) diameter - Available in various wall thicknesses **Welding Characteristics:** - Good field weldability with proper procedures - Suitable for SMAW, GMAW, FCAW processes - Pre-heat recommended for thicker sections - Post-weld heat treatment available when specified **Forming & Machining:** - Good cold forming properties - Suitable for field bending with proper equipment - Good machinability for end preparation - Can be grooved, threaded, or beveled for connections --- #### **8. Quality Assurance & Testing** **Mandatory Tests (per ASTM A139):** - Transverse or longitudinal tension test - Flattening test - Bend test - Hydrostatic test - Non-destructive electric test **Additional Tests (when specified):** - Chemical analysis - Charpy impact test - Hardness test - Visual inspection - Dimensional verification --- #### **9. Corrosion Performance** - **Atmospheric Corrosion**: Good resistance, enhanced with copper addition - **Water Service**: Suitable for various water qualities - **Soil Corrosion**: Requires comprehensive coating systems - **Chemical Resistance**: Adequate for mild chemical environments - **Protection Methods**: External coatings, internal linings, cathodic protection --- #### **10. Available Product Forms** **Size Range:** - **Nominal Diameter**: 4 inches to 144 inches - **Wall Thickness**: Various schedules from STD to XXS - **Lengths**: Single random (16-22 ft) or double random (35-40 ft) **Surface Conditions:** - Bare (as-welded) - Primed and coated - Internally lined - Galvanized (special order) --- #### **11. Technical Specifications** **Dimensional Standards:** - **Outside Diameter Tolerance**: ±0.5% of nominal diameter - **Wall Thickness Tolerance**: ±10% - **Length Tolerance**: +300 mm (+12 in), -0 mm - **Straightness Tolerance**: 0.08% of length **Pressure Ratings:** - **Maximum Working Pressure**: Higher than Grade A due to increased strength - **Design Factor**: Typically 0.72 for pipeline applications - **Temperature Range**: -29°C to 427°C (-20°F to 800°F) - **Hydrostatic Test Pressure**: Minimum 2.5 times design pressure --- **Technical Notes:** - Grade B provides approximately 25% higher tensile strength than Grade A - Suitable for service temperatures from -29°C to 427°C (-20°F to 800°F) - EFW process allows for cost-effective large diameter pipe manufacturing - Must comply with applicable pipeline codes (ASME B31.4, B31.8, etc.) - Regular inspection and maintenance recommended for high-pressure service *This information is for reference purposes. For complete requirements and current specifications, consult the latest ASTM A139/A139M standard and applicable pipeline safety codes. Always verify material properties with certified mill test reports before installation and operation.* -:- For detailed product information, please contact sales. -: ASTM A139 Steel, grade B Specification Dimensions Size： Diameter 20-1000 mm Length <4231 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 A139 Steel, grade B Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A139 Steel Flange, grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A139 Steel Flange, grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A139 Steel Flange, grade B -:- 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 702 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