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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EN S235JRG1 High Manganese, Structural, Hot Rolled, Base Steel Flange Product Information
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EN S235JRG1 High Manganese, Structural, Hot Rolled, Base Steel Flange Synonyms
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EN S235JRG1 High Manganese, Structural, Hot Rolled, Base Steel Product Information
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**Product Name:** EN S235JRG1 Structural Steel, Hot Rolled, Base Material
**Overview:**
EN S235JRG1 is a **non-alloy base structural steel** specified under the EN 10025-2 standard, belonging to the S235 strength category. The designation **"G1"** signifies the steel is supplied in a specific condition: **hot-rolled, without a defined requirement for normalizing or thermomechanical rolling, but typically implying as-rolled with guaranteed mechanical properties.** This grade provides the fundamental combination of yield strength, formability, and weldability that defines S235 steel, with an explicit focus on its delivery condition. It is **not a "High Manganese" steel**, and its mechanical properties are not enhanced for low-temperature service beyond the base "JR" level.
**Key International Standards:**
* **Primary Standard:** **EN 10025-2:2019** - Hot rolled products of structural steels - Part 2: Technical delivery conditions for non-alloy structural steels.
* **Grade & Condition Designation:** **S235JRG1**
* **S:** Structural Steel.
* **235:** Minimum yield strength in MPa (for nominal thickness ≤ 16mm).
* **JR:** Base quality designation. Impact tested at **+20°C (Room Temperature)**.
* **G1:** Supplementary designation for the **delivery condition**. "G1" specifies the product is supplied in the condition as defined in the standard for hot-rolled products, **typically the as-rolled (AR) condition**.
* **Clarification:** The "G1" designation is primarily a formal statement of the standard delivery condition and is often omitted in common trade, where "S235JR" is used interchangeably. It serves to explicitly differentiate from other conditions like normalized (G3) or thermomechanically rolled (G4).
* **Clarification on "High Manganese":** This is **incorrect**. S235JRG1 has a standard manganese content for its class (≤1.40%). Its designation is about processing condition, not alloy content.
* **Common International Equivalents:**
* **ASTM:** **A36** (general purpose equivalent).
* **JIS:** **SS400**.
* **GB/T:** **Q235B**.
**Chemical Composition (Ladle Analysis, % by weight, maximum values):**
Standard composition for S235JR.
* **Carbon (C):** ≤ **0.17%**
* **Manganese (Mn):** ≤ **1.40%** (Standard range).
* **Phosphorus (P):** ≤ **0.045%**
* **Sulphur (S):** ≤ **0.045%**
* **Nitrogen (N):** ≤ **0.014%** (for killed steel).
**Physical & Mechanical Properties (for hot-rolled/as-rolled 'G1' condition, thickness ≤ 16mm):**
* **Yield Strength (ReH):** ≥ **235 MPa** (Minimum for t ≤ 16mm; decreases with thickness).
* **Tensile Strength (Rm):** **360 - 510 MPa**.
* **Elongation at Break (A5):** ≥ **26%** (Minimum, longitudinal).
* **Impact Energy (KV):** ≥ **27 J at +20°C** (Longitudinal, Charpy V-notch). **No guarantee for lower temperatures.**
* **Delivery Condition:** **As-Hot-Rolled**. The microstructure and properties are a direct result of the rolling and cooling process, without subsequent heat treatment.
* **Density:** **~7.85 g/cm³**.
* **Modulus of Elasticity:** **210 GPa**.
**Product Features:**
1. **Standard Base Grade:** Represents the most common and economical form of S235 structural steel.
2. **Excellent Weldability and Formability:** Low carbon equivalent ensures easy welding and good cold bending performance.
3. **As-Rolled Properties:** Offers a good balance of strength and ductility directly from the mill, suitable for the vast majority of general applications not requiring enhanced toughness or special processing.
**Typical Applications:**
S235JRG1 is used for general structural purposes where no special low-temperature or processing requirements exist.
* **General Construction:** Beams, columns, braces, and plates in buildings, warehouses, and light industrial structures in temperate climates.
* **Fabrication:** Machine bases, guards, frames, staircases, and handrails.
* **Non-Critical Infrastructure:** Fencing, simple supports, and non-load bearing elements.
**Available Forms & Processing:**
* **Forms:** Hot-rolled sheets, plates, strips, bars, and all standard structural sections.
* **Surface:** With mill scale.
* **Processing:** Easily cut, welded, drilled, and formed.
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**Critical Note:**
The designation **S235JRG1** is technically precise but functionally identical to the commonly used **S235JR**. The "G1" explicitly confirms the as-rolled condition. It is **not suitable for cold climates** (below 0°C service). The term **"High Manganese" is completely erroneous** and should not be associated with this grade. For projects requiring guaranteed toughness at lower temperatures, grades like **S235J2** or **S235J2G3/G4** must be specified.
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EN S235JRG1 High Manganese, Structural, Hot Rolled, Base Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5815 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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EN S235JRG1 High Manganese, Structural, Hot Rolled, Base Steel Properties
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Applications of EN S235JRG1 High Manganese, Structural, Hot Rolled, Base Steel Flange
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Chemical Identifiers EN S235JRG1 High Manganese, Structural, Hot Rolled, Base Steel Flange
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Packing of EN S235JRG1 High Manganese, Structural, Hot Rolled, Base Steel Flange
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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 2286 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
