The DIN 2558 Duplex Flange PN 6 is a high-quality, precision-engineered piping component designed to deliver exceptional mechanical strength and corrosion resistance in harsh industrial environments. Manufactured to DIN (Deutsches Institut für Normung) standards, these flanges are produced using premium duplex stainless steels, which combine the benefits of both austenitic and ferritic stainless steels. Ladhani Metal Corporation supplies these flanges with a strong focus on durability, reliability, and performance under challenging operating conditions. Duplex flanges are widely used in industries such as oil and gas, petrochemical, marine, desalination, pulp and paper, and chemical processing—where resistance to stress corrosion cracking, pitting, and crevice corrosion is essential. The PN 6 pressure rating (6 bar or approximately 87 psi) makes these flanges suitable for medium-pressure systems that demand both structural integrity and long service life. Types: Weld Neck Flange – Provides a robust, welded connection ideal for high-stress, high-temperature applications. Slip-On Flange – Offers ease of installation and is welded on both the inner and outer surfaces for a secure fit. Blind Flange – Used to close the end of a pipe system, ensuring leak-tight sealing. Threaded Flange – Allows for easy, non-welded connection to piping systems with threaded ends. Socket Weld Flange – Ideal for smaller-diameter high-pressure lines, offering smooth flow and strong connections. Grades & Chemical Composition: Duplex 2205 (UNS S31803/S32205): Chromium (Cr): 21.0 – 23.0% Nickel (Ni): 4.5 – 6.5% Molybdenum (Mo): 2.5 – 3.5% Manganese (Mn): ≤ 2.0% Silicon (Si): ≤ 1.0% Nitrogen (N): 0.14 – 0.20% Carbon (C): ≤ 0.03% Iron (Fe): Balance Key Features: Excellent resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking. Superior strength compared to standard stainless steels PN 6 Rating: The PN 6 rating signifies a nominal pressure capacity of 6 bar (approximately 87 psi), making these flanges suitable for medium-pressure applications in both industrial and marine systems where enhanced corrosion resistance and mechanical strength are required. Features: Corrosion Resistance: Excellent resistance to a wide range of corrosive environments, especially chlorides and sulfides. High Strength: Duplex steel offers nearly twice the strength of conventional austenitic stainless steel, reducing wall thickness and weight. Stress Corrosion Resistance: Ideal for applications involving aggressive media and fluctuating temperatures. Longevity: Designed to offer extended service life with minimal maintenance in severe environments. Versatile Use: Applicable in offshore platforms, chemical plants, desalination systems, and high-performance piping networks . Cost-Efficient: Combines strength and corrosion resistance, often allowing for reduced material thickness and overall system weight. Ladhani Metal Corporation ensures that each DIN 2558 Duplex Flange is precision-machined and rigorously tested to meet or exceed international standards. These flanges offer a reliable, leak-proof solution for critical piping systems, balancing performance, safety, and long-term value.
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