Duplex Steel Flanges

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Duplex steel flanges are pipe connection parts made from duplex stainless steel, offering high strength and excellent corrosion resistance. It blends the best properties of ferritic and austenitic stainless steels in its construction. Remarkable toughness, stress resistance and durability in harsh environments are provided by this balance. These flanges are known for their resistance to chloride stress cracking, pitting and crevice corrosion. Duplex 2205 (UNS S32205/S31803) and Super Duplex 2507 (UNS S32750) are common grades. To meet the exacting demands of the industry, Metracore Alloys produces duplex steel flanges with meticulous att0ention to both mechanical strength and chemical balance.

Duplex Steel Flanges Supplier, Duplex Steel Flanges Manufacturer in Mumbai India

Duplex stainless steel flanges come in sizes ranging from 1/8″ NB up to 24″ NB with larger options available under ASME B16.47 standards. They function well in acidic and alkaline conditions and maintain their strength at high temperatures. They are reliable in environments where constant stress is an issue due to their resistance to exhaustion. Duplex flanges are one of the most trusted choices for long service life under pressure due to its combination of characteristics.

These flanges are widely used in oil and gas, chemical processing, pulp and paper, and water treatment. Their performance in chloride-rich conditions makes them a better choice than standard stainless steel in many cases. Reactors, pipelines, desalination plants, heat exchangers and pressure vessels all use them. Precision machining, heat treatment and forging are the steps in the manufacturing process which is followed by extensive testing. Heat treatment guarantees that the material can withstand high-pressure situations without failing, while forging aligns the grain structure for increased strength.

ASTM A182 Duplex Steel Flanges Stockist and Distributor

To ensure quality, our duplex stainless steel flanges are supplied with certifications such as ASTM A182 and ASME B16.5, along with Mill Test Certificates and EN 10204 3.1/3.2. For sour service, many also adhere to NACE MR0175 standards. To safeguard the flanges during transportation, we offer a variety of packaging choices, such as wooden cases, plywood pallets, bubble wrap and specially made crates. Customers are ensured to receive reliable and safe products that are designed for installation thanks to this thorough process

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Table of Content

Duplex Steel Flanges Specification

Types of Duplex Steel Flanges

Duplex Steel Flanges Face Forms

Reach out to Metracore Alloys for reliable Duplex Steel Flanges solutions

Technical Details of Duplex Steel Flanges

Duplex Steel Flange Pressure Ratings

ASME/ANSI B 16.5	Slip on Flange, Welding Neck Flange, High Hub Blind Flange, Blind Flange, Lap Joint Flange, Socket Weld Flange, Ring Type Joint Flange, Threaded Flange
PRESSURE CLASS	150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B 16.47	Blind Flange [Series A & B], Welding Neck Flange
PRESSURE CLASS	75, 150, 300, 400, 600, 900
ASME/ANSI B 16.36	Slip on Flange, Welding Neck Flange, Threaded Flange
PRESSURE CLASS	300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1	Hubbed Slip on Flange, Welding Neck Flange, Lapped Pipe End Flange, Hubbed Threaded Flange, Loose Plate Flange, Plate Flange, Blank Flange, Loose Plate With Weld Neck Flange
PRESSURE CLASS	PN 2.5 TO PN 40
BS 4504[PART 1]	Welding Neck Flange, Plate Flange, Hubbed Slip-On Hubbed Threaded, Blank Flange, Loose Plate With Weld On Plate Collar
PRESSURE CLASS	PN 2.5 TO PN 400
BS 1560 BOSS	Socket Welding Flange, Welding Neck Flange, Blind Flange, Slip-On Flange, Lapped Flange, Screwed Boss Flange
PRESSURE CLASS	150, 300, 400, 600, 900, 1500, 2500
BS10	Plate Slip-On Flange, Welding Neck Flange, Slip-On Boss Flange, Screwed Boss Flange, Blind Flange
TABLE	D, E, F, H
DIN FLANGES	DIN 2527, 2566, 2573, 2576, 2641, 2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637, 2638, 2673
PRESSURE CLASS	PN 6 TO PN 100

ASTM A182 Duplex Steel Flanges Weight Chart

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS4087 Flanges	PN14 Flanges	95	67	4	M12	14
AS 2129 Flanges	Table C Flanges	95	67	4	13	14
	Table D Flanges	95	67	4	13	14
	Table E Flanges	95	67	4	13	14
	Table F Flanges	95	67	4	13	14
	Table H Flanges	114	83	4	16	17
	Table J Flanges	114	83	4	16	17
ANSI B16.5 Flanges	ANSI 150 Flanges	89	60	4	13	16
	ANSI 300 Flanges	95	67	4	13	16
	ANSI 600 Flanges	95	67	4	13	16
	ANSI 900 Flanges	121	83	4	19	22
	ANSI 1500 Flanges	121	83	4	19	22
ISO 7005 (DIN) Flanges	PN6 Flanges	80	55	4	M10	11
	PN10 Flanges	95	65	4	M12	14
	PN16 Flanges	95	65	4	M12	14
	PN20 Flanges	90	60.5	4	M14	16
	PN25 Flanges	95	65	4	M12	14
	PN40 Flanges	95	65	4	M12	14