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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Bethlehem Steel Flange ASTM A572 Grade 65 3/16 to 1/2 in. thick, as-rolled Steel Flange plate Product Information
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Bethlehem Steel Flange ASTM A572 Grade 65 3/16 to 1/2 in. thick, as-rolled Steel Flange plate Synonyms
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Bethlehem Steel ASTM A572 Grade 65 3/16 to 1/2 in. thick, as-rolled steel plate Product Information
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**Product Introduction: Bethlehem Steel ASTM A572 Grade 65 Steel Plate (As-Rolled, 3/16" to 1/2" thick)**
**Product Overview:**
Bethlehem Steel ASTM A572 Grade 65 represents a premium tier of high-strength, low-alloy (HSLA) structural steel plate. Designed for applications where maximum strength-to-weight ratio is paramount, this grade offers a minimum yield strength of 65 ksi. Supplied in the as-rolled condition for thicknesses ranging from 3/16 inches (4.8 mm) to 1/2 inch (12.7 mm), it enables the design of exceptionally strong, yet lightweight structural components and is particularly valued in mobile equipment and transportation industries.
**Key International Standard:**
* **ASTM A572 / A572M:** Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel. Grade 65 specifies a minimum yield strength of 65 ksi (450 MPa). This is a globally recognized and accepted specification for high-strength structural steel.
**Chemical Composition (Typical, weight %):**
The composition is precisely balanced to achieve the higher strength level while maintaining adequate weldability and toughness. Micro-alloying with columbium (niobium) and/or vanadium is key to grain refinement and precipitation strengthening.
* **Carbon (C):** 0.23% max (Note: Often controlled to the lower end of the range for improved weldability)
* **Manganese (Mn):** 1.65% max
* **Phosphorus (P):** 0.04% max
* **Sulfur (S):** 0.05% max
* **Silicon (Si):** 0.40% max
* **Columbium (Cb/Nb):** 0.005 - 0.05%
* **Vanadium (V):** 0.01 - 0.15%
* **Note:** The specific alloy design may vary by producer. Bethlehem Steel historically employed optimized chemistry to reliably meet the demanding mechanical properties in the as-rolled condition for this grade.
**Physical & Mechanical Properties (For as-rolled plates 3/16" to 1/2" thick):**
* **Yield Strength (min):** 65 ksi (450 MPa)
* **Tensile Strength (min):** 80 ksi (550 MPa)
* **Elongation in 2" (min):** 17%
* **Elongation in 8" (min):** 19%
* **Modulus of Elasticity:** ~29,000 ksi (200 GPa)
* **Density:** 0.284 lb/in³ (7.85 g/cm³)
* **Poisson's Ratio:** 0.29
* **Thermal Expansion Coefficient:** 6.5 x 10⁻⁶/°F (11.7 x 10⁻⁶/°C)
* **Machinability:** Fair. The high strength requires more powerful equipment, positive feeds, sharp tooling, and appropriate cutting speeds/feeds.
* **Weldability:** Good to Very Good. Welding is readily accomplished using common processes (SMAW, GMAW, FCAW). However, due to the higher strength and carbon equivalent, **strict adherence to proper welding procedures is essential**. This often includes the use of low-hydrogen electrodes, controlled heat input, and may require preheat and interpass temperature control, especially as thickness approaches the upper limit or in highly restrained joints, to prevent hydrogen-induced cracking (HIC) and ensure joint integrity.
**Product Applications:**
This high-strength plate is specified for critical, weight-sensitive applications where material savings and performance are key drivers:
* **Heavy Mobile Equipment & Machinery:** Primary structural members for crane booms, excavator arms, loader frames, and mining shovel components where high strength reduces dead weight and increases payload or operational range.
* **Transportation & Trucking:** High-stress members in dump truck bodies, trailer chassis, log haulers, and advanced commercial vehicle frames.
* **Access Platforms & Aerial Work Devices:** Booms, jibs, and turntable structures for aerial lifts and telehandlers.
* **Material Handling:** Critical components for heavy-duty forklifts, port container handling equipment, and automated storage/retrieval systems.
* **Infrastructure:** Specialized bridge components, high-load-capacity sign supports, and energy absorber systems (e.g., for highway safety).
* **Military & Defense:** Armor backing plates, vehicle structural elements, and other applications requiring high ballistic or blast resistance in a lightweight configuration.
**Additional Information:**
* **Condition:** As-rolled. The properties are achieved through controlled thermomechanical processing during rolling, without subsequent heat treatment.
* **Availability:** ASTM A572 Grade 65 is a specialized, high-strength product. While Bethlehem Steel was a historic producer, equivalent material is available from select domestic and international mills capable of meeting the stringent requirements of this grade.
* **Design Consideration:** The use of Grade 65 steel allows for significant cross-section reduction compared to lower grades (A36, Grade 50), leading to major weight savings. Engineers must carefully consider buckling, fatigue, and connection design specific to high-strength steels.
**Disclaimer:**
The information provided is based on the ASTM standard and typical industry data for this product. For all engineering, fabrication, and procurement activities, it is mandatory to consult:
1. The latest official **ASTM A572/A572M** specification.
2. Applicable design codes (e.g., AISC, AWS D1.1).
3. The certified **Mill Test Report (MTR)** for the specific material lot, which provides the verified chemical and mechanical properties.
4. Qualified welding procedure specifications (WPS) developed for this specific grade and thickness.
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Bethlehem Steel ASTM A572 Grade 65 3/16 to 1/2 in. thick, as-rolled steel plate Specification
Dimensions
Size：
Diameter 20-1000 mm Length <4629 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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Bethlehem Steel ASTM A572 Grade 65 3/16 to 1/2 in. thick, as-rolled steel plate Properties
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Applications of Bethlehem Steel Flange ASTM A572 Grade 65 3/16 to 1/2 in. thick, as-rolled Steel Flange plate
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Chemical Identifiers Bethlehem Steel Flange ASTM A572 Grade 65 3/16 to 1/2 in. thick, as-rolled Steel Flange plate
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Packing of Bethlehem Steel Flange ASTM A572 Grade 65 3/16 to 1/2 in. thick, as-rolled Steel Flange plate
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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 1100 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
