Carbon steel flanges are the backbone of high-pressure piping systems in the oil, gas, and petrochemical industries.
At RAYOUNG, we don’t just supply parts; we provide engineered solutions. Understanding the specific types and functions of carbon steel flanges is critical for ensuring system integrity and long-term cost-efficiency.

Types of Carbon Steel Flanges
Welding neck flange
These flanges are popular for their long conical collar; with the accompanying wire, their end is welded to the bottom. The tube’s inner diameter is similar to that of the flange.
Weld Neck Flanges (WN) Designed for high-stress environments and extreme temperature fluctuations. Our WN flanges feature a tapered hub for superior reinforcement.

Sliding flanges (slip-on)
The tube penetrates the cube of the same in this form of flanges without touching the plane of the touch face to which it is connected by means of internal and external welding seams. Owing to the lower accuracy of the tube duration and better flexibility of place it can be regarded as easier than the neck flange. Its mechanical conditions are usually fine for resistance and exhaustion, but much weaker than neck flanges.
Slip-On Flanges (SO): A cost-effective solution for low-pressure applications, preferred by contractors for their ease of installation and alignment.

Blind flanges
They are designed to cover the ends of the tubing, valves or tube openings, due to various operating pressures.
Blind Flanges (BL): Essential for sealing piping systems or pressure vessel openings, built to withstand significant back-pressure.

Threaded flanges
While they do not bear welding characteristics, making for simple and fast assembly. It is used for specific applications (for instance in pipelines where elevated pressures and atmospheric temperature are present). It is not feasible to use them in ducts where temperature differences are large.
Why Carbon Steel?
Carbon steel, or medium carbon steel, is an element of metal. It is a mixture of the iron and carbon components. Many components are too small to influence its properties in amounts. In pure carbon steel the only other elements permitted are: manganese (1.65 percent max), silicon (0.60 percent max) and copper (0.60 percent max). With more carbon content these Carbon Steel Flanges achieve strength and toughness but are less ductile and tougher to weld.
Why Our ASTM A105 Matters?
We utilize premium forged carbon steel (ASTM A105) which undergoes controlled heat treatment to ensure optimal grain structure. This results in superior weldability and toughness, reducing the risk of brittle failure in harsh operating conditions.
Functions of the Carbon Steel Flanges
Forged flanges are less carbon-free than molten flanges in general. They don’t oxidize quickly. They are flat, the construction is fairly lightweight and the molten flange has superior mechanical properties. Improper methods of forging can often result in broad or irregular grains; it is higher to harden cracking and forging than the casting flange.
According to the manufacturing cycle, the forging flange has some operational theory in the carbon steel flanges. The production method and the usage of the carbon steel flange provide certain operating theory.
Its basic philosophy is to use the insulation efficiency of the carbon steel flange isolating gasket. Insulation with high duty carbon steel flange, carbon steel flanges on both sides of the electrical insulation flange of the plant.
Mary Iron and galvanized tubing, which is heavier than concrete, are widely used (canned) than steel. Low carbon steel from Stainless Steel Flanges Factories In India, refining of cast carbon steel flanges, forging and grinding, rivets, screws, brace production such as low carbon steel flanges is used.
Strategic Partnership for Stockists & Distributors:
- Surface Protection: Every carbon steel flange is treated with black paint, anti-rust oil, or hot-dip galvanizing to ensure long-term storage without corrosion.
- Precise Machining: Our CNC-finished sealing faces (RF, FF, RTJ) meet exact roughness requirements to ensure zero-leakage performance.
- Rapid Fulfillment: For standard carbon steel flanges, we maintain a rolling stock to support urgent distributor needs and project deadlines.

As a premier manufacturer with over 40 years of expertise in steel butt-weld pipe fittings and flanges, RAYOUNG/JS FITTINGS is built for the global supply chain.
We specialize in high-volume production and full-container load (FCL) orders, offering the competitive pricing and strict quality control that distributors need to maintain a healthy bottom line.
Beyond our capacity for bulk supply, our reputation is backed by a proven track record with National Oil Companies (NOCs) such as ADNOC and Petrobras.
This means when you stock RAYOUNG/JS Fittings, you are providing your customers with products already trusted by the world’s most demanding end-users.
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info@hb-steel.com