Flange forging process

The flange forging process typically involves several key steps: selecting high-quality steel billets, cutting, heating, forming, and cooling after forging. The forging methods include open-die forging, die forging, and ring rolling. The choice of forging method depends on the size of the forging, production batch size, and specific requirements.

Forging Rolling Flange Production

Forging Methods:

1.Open-Die Forging:

In open-die forging, the shape of the flange is gradually formed through basic deformation processes. These processes include upsetting, drawing out, punching, bending, and cutting. This method is flexible and suitable for producing various shapes and sizes in smaller batches.

2.Die Forging:

Die forging, also known as closed-die forging, involves placing the heated billet into a fixed die attached to a forging machine, where it is formed into the desired shape. The basic steps in die forging are cutting, heating, pre-forging, final forging, trimming, edge cutting, tempering, and shot blasting. Common techniques in die forging include upsetting, drawing out, bending, punching, and forming. Typical die forging equipment includes die hammers, hot forging presses, flat forging machines, and friction presses.

Quality Inspection of Forged Flanges

The quality inspection of forged flanges covers various aspects, including:

Geometric Shape and Size Inspection: Ensuring the dimensions and shapes meet the specified requirements.

Surface Quality Inspection: Checking for any surface defects such as cracks, scales, or irregularities.

Internal Quality Inspection: Using methods like ultrasonic testing to detect internal flaws or discontinuities.

Mechanical Properties Inspection: Assessing the mechanical properties such as tensile strength, yield strength, and elongation.

Chemical Composition Inspection: Verifying the chemical composition to ensure it meets the required standards.

The specific inspection items and requirements vary depending on the grade of the forgings.

ASTM A105N Weld Neck Flanges

Haihao Group’s commitment to excellence in the manufacturing of pressure pipeline components, particularly flanges, is demonstrated through our meticulous forging processes and stringent quality control measures. By employing advanced forging techniques and thorough inspection procedures, we ensure that our products meet the highest industry standards for performance, reliability, and safety. Contact Haihao Group for high-quality, reliable flange solutions tailored to your specific needs.