NFI STEEL, located in Cangzhou, China, is a professional manufacturer and supplier of flanges, fittings, and pipeline components. This article introduces the manufacturing process and delivery conditions of A105N flanges, providing customers with insight into the company’s production standards and quality management.

1. Manufacturing Process of A105N Flanges

(1) Material Selection

A105N flanges are typically made from carbon steel, which provides high strength and rigidity to withstand elevated temperatures and pressures. At NFI STEEL, we select premium-grade raw materials and ensure chemical compositions strictly meet technical standards.

(2) Forging and Forming

The raw material is forged or cast into the required flange blank, then processed by hot forging, rolling, or extrusion to achieve the desired dimensions, strength, and surface quality. These controlled processes enhance the mechanical performance and surface smoothness of the flange.

(3) Machining the Flange Face

Each flange is machined according to precise standards. During this process, surface flatness and roughness are carefully controlled to ensure perfect sealing performance and compliance with international specifications.

(4) Inspection and Testing

NFI STEEL performs rigorous inspection throughout production to guarantee product quality and consistency.

Dimensional Inspection – Ensures accurate outer and inner diameters, bolt holes, and thickness.

Surface Inspection – Detects any defects such as scratches, cracks, or burrs.

Chemical Composition Analysis – Confirms raw materials meet composition standards.

Mechanical Testing – Evaluates pressure resistance, tensile strength, and hardness performance.

2. Delivery Conditions of A105N Flanges

NFI STEEL offers A105N flanges in several delivery conditions to meet diverse customer needs:

As-Forged Condition – The flange surface retains its natural finish after hot processing; some oxidation may remain and can be polished by the end user.

Anti-Rust Treatment Condition – Surfaces are zinc- or nickel-plated to prevent corrosion; ideal for general storage or transport but may affect pressure rating slightly.

Coated Condition – The flange is painted or coated for enhanced protection against contamination and rust; coating type can be customized to suit specific environments.

Customized Condition – Tailor-made according to client requirements, such as special coatings, markings, or packaging solutions.

3. Quality Commitment

NFI STEEL strictly follows international standards such as ANSI, ASME, and EN, ensuring every A105N flange meets global engineering requirements. The company provides flexible delivery options and customized services to support complex project needs in petrochemical, shipbuilding, and energy industries.

With a commitment to “Quality First and Customer Satisfaction”, NFI STEEL welcomes global partners to visit our facilities, evaluate our production capabilities, and establish long-term cooperation.

Learn more about our A105N Flange here：
https://www.enfipipe.com/flanges_details/176.html