1. Steel with a carbon mass fraction of less than 2.11% and no intentionally added alloying elements. Sometimes also called plain carbon steel or carbon steel. Carbon steel is also called carbon steel, which refers to an iron-carbon alloy with a carbon content Wc of less than 2.11%. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur, and phosphorus. According to the purpose, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel and free-cutting structural steel. Carbon structural steel is further divided into engineering construction steel and machine manufacturing structural steel;

2. According to the smelting method, it can be divided into open-hearth steel and converter steel;

3. According to the deoxidation method, it can be divided into boiling steel (F), killed steel (Z), semi-killed steel (b) and special killed steel (TZ);

4. According to the carbon content, carbon steel can be divided into low carbon steel (WC ≤ 0.25%), medium carbon steel (WC0.25%-0.6%) and high carbon steel (WC>0.6%);

5. According to the quality of steel, carbon steel can be divided into ordinary carbon steel (high phosphorus and sulfur content), high-quality carbon steel (low phosphorus and sulfur content), high-quality steel (lower phosphorus and sulfur content) and special high-quality steel. Note: Generally, the higher the carbon content in carbon steel, the greater the hardness and strength, but the lower the plasticity. Large diameter flange blank manufacturer connection is to fix two pipes, pipe fittings or equipment on a flange plate, add flange gaskets between the two flange plates, and fasten them together with bolts to complete the connection. Some pipe fittings and equipment already have flange plates, which also belong to flange connection. Flange connection is widely used in industrial pipelines.

Manufacturing Processes

Material & Process Compatibility

Technical Specifications

Pressure Ratings

GB: PN6-PN100 | ASME: Class 150-2500

Dimensions

Diameter: DN15-DN3000 (1/2"-120") | Thickness: 6mm-300mm

Process-Linked Performance

Forged Flanges: Tensile strength ≥485MPa, Impact energy ≥40J (ASTM A105)

Hot-Expanded Flanges: Radial deformation ≤5%, Ovality ≤1.5%

Cast Flanges: RT inspection compliant with GB/T 9444 Grade II