ASTM A135 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 A135 Steel Flange, grade B Product Information -:- For detailed product information, please contact sales. -: ASTM A135 Steel Flange, grade B Synonyms -:- For detailed product information, please contact sales. -:

ASTM A135 Steel, grade B Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: ASTM A135 / A135M Steel, Grade B** --- #### **1. Product Overview** ASTM A135 Grade B is a specification for **electric-resistance-welded (ERW) carbon steel tubes** designed for high-pressure applications and structural uses requiring enhanced mechanical properties. This grade offers higher strength compared to Grade A while maintaining good weldability and formability, making it suitable for pressure piping, structural supports, and mechanical applications where increased load-bearing capacity is required. The tubes are manufactured by the ERW process and can be supplied in as-welded or cold-drawn conditions. --- #### **2. International Standards & Equivalents** | Standard Organization | Designation | |-----------------------|-------------| | **ASTM International** | **A135 / A135M Grade B** | | **API (American Petroleum Institute)** | **API 5L Grade B** (Similar) | | **ISO International Standard** | **ISO 559** (Equivalent) | | **European Norm (EN)** | **EN 10255** | | **Japanese (JIS)** | **G 3444** | | **Chinese GB** | **GB/T 3091** | --- #### **3. Chemical Composition (Weight %)** | Element | Composition (%) | |---------|-----------------| | **Carbon (C)** | 0.30 max | | **Manganese (Mn)** | 0.29-0.82 | | **Phosphorus (P)** | 0.035 max | | **Sulfur (S)** | 0.035 max | | **Copper (Cu)** | 0.20 min (when required) | | **Iron (Fe)** | Balance | **Key Composition Features:** - **Higher Carbon Content**: Provides increased strength compared to Grade A - **Extended Manganese Range**: Enhances strength and hardenability - **Low Sulfur and Phosphorus**: Maintains good ductility and weldability - **Optional Copper Addition**: Improves atmospheric corrosion resistance --- #### **4. Mechanical Properties** **Tensile Properties:** - **Tensile Strength**: 414 MPa (60 ksi) min - **Yield Strength**: 241 MPa (35 ksi) min - **Elongation in 50 mm (2 in)**: - 30% min (as-welded) - 20% min (cold-drawn) **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 | --- #### **6. Product Applications** **High-Pressure Applications:** - Medium-pressure steam and water lines - Oil and gas transmission lines - Hydraulic systems at higher pressures - Compressed air systems - Process piping for industrial plants **Structural Applications:** - Heavy-duty structural supports - Construction framework - Load-bearing structural members - Mechanical equipment frames - Architectural applications requiring higher strength **Industrial Applications:** - Boiler tubes and heat exchangers - Machinery and equipment components - Automotive structural parts - Conveyor system components - Agricultural equipment requiring higher strength --- #### **7. Manufacturing & Fabrication** **Manufacturing Process:** - **Electric Resistance Welding (ERW)** - Continuous forming and welding - Available in as-welded or cold-drawn conditions - Sizes range from 1/8" to 26" nominal diameter **Welding Characteristics:** - Good weldability using standard processes - SMAW, GMAW, GTAW suitable - Pre-heat may be required for thicker sections - Post-weld heat treatment optional for critical applications **Forming & Machining:** - Good cold forming properties - Adequate bendability with proper bending radius - Good machinability with carbide tooling - Suitable for threading and grooving operations --- #### **8. Quality Assurance & Testing** **Mandatory Tests (per ASTM A135):** - Transverse tension test - Flattening test - Reverse flattening test (for sizes ≤ 4½" NPS) - Hydrostatic test or non-destructive electric test **Additional Tests (when specified):** - Bend test - Chemical analysis - Charpy impact test - Hardness test --- #### **9. Corrosion Performance** - **Atmospheric Corrosion**: Moderate resistance, better with copper addition - **Water Corrosion**: Similar to Grade A, coatings recommended - **Chemical Resistance**: Suitable for mild chemical environments - **Protection Methods**: Galvanizing, epoxy coating, or cathodic protection --- #### **10. Available Product Forms** **Size Range:** - **Nominal Diameter**: 1/8" to 26" NPS - **Wall Thickness**: Schedule 10 to Schedule 160 - **Lengths**: Random (16-22 ft) or cut to length **Surface Conditions:** - Black (as-welded) - Galvanized - Painted or coated --- #### **11. Technical Specifications** **Dimensional Standards:** - **Outside Diameter Tolerance**: ±0.79 mm (±0.031 in) - **Wall Thickness Tolerance**: ±12.5% - **Length Tolerance**: +3 mm (+1/8 in), -0 mm **Pressure Ratings:** - **Maximum Working Pressure**: Higher than Grade A due to increased strength - **Design Factor**: Typically 0.72 for pressure applications - **Temperature Range**: -29°C to 427°C (-20°F to 800°F) --- **Technical Notes:** - Grade B provides approximately 17% higher tensile strength than Grade A - Suitable for service temperatures from -29°C to 427°C (-20°F to 800°F) - ERW process ensures consistent quality and dimensional accuracy - Must comply with applicable pressure vessel and piping codes - Regular inspection and maintenance recommended for high-pressure applications *This information is for reference purposes. For complete requirements and current specifications, consult the latest ASTM A135/A135M standard and applicable codes (ASME B31.1, B31.3, etc.). Always verify material properties with certified mill test reports before installation.* -:- For detailed product information, please contact sales. -: ASTM A135 Steel, grade B Specification Dimensions Size： Diameter 20-1000 mm Length <4229 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 A135 Steel, grade B Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A135 Steel Flange, grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A135 Steel Flange, grade B -:- For detailed product information, please contact sales. -:

Packing of ASTM A135 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 700 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