AS 4087 PN16 & PN21 Flanges Manufacturer

AS 4087 PN16 & PN21Flanges

Manufacturer and Supplier of AS 4087 PN16 & PN21 Flanges in Various Material Grades. AS 4087 PN16 Weld Neck Flanges Manufacturer in Mumbai, India. Carbon Steel AS 4087 PN21 Slip On Flanges Supplier, AS 4087 PN16 Stainless Steel Blind Flanges, Alloy Steel AS 4087 PN21 Weld Neck Raised Face Flanges, AS 4087 PN16 Inconel Lap Joint Flanges Exporter, Hastelloy AS 4087 PN21 Blind Flanges Stockist, Copper Nickel AS 4087 PN16 Socket Weld Flanges, AS 4087 PN16 Threaded Flanges, AS 4087 PN21 Orifice Flanges, AS 4087 PN16 SWRF Flanges, AS 4087 PN21 BLRF Flanges, AS 4087 PN16 Alloy Steel Spectacle Blind Flanges Exporter in Mumbai, India, Duplex Steel AS 4087 PN16 & PN21 SORF Flanges, Monel AS 4087 PN21 Orifice Plate Flange Set, AS 4087 PN16 & PN21 Flanges Manufacturer in Australia.

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At Werner Flanges Inc., we are a leading manufacturer and supplier of precision-engineered AS 4087 PN16 and PN21 flanges, built to meet the stringent demands of water pipelines, treatment plants, and pressure piping systems. Compliant with Australian Standards, these flanges are widely used for their reliability and leak-proof performance in critical fluid-handling applications. We offer a full range including weld neck, slip-on, blind, socket weld, threaded, and orifice flanges, available in materials such as carbon steel, stainless steel, duplex steel, Inconel, Monel, Hastelloy, and copper nickel. Whether you require PN16 flanges for 16 bar systems or PN21 flanges for higher pressure ratings, our products deliver unmatched durability, dimensional accuracy, and corrosion resistance.

With decades of industry expertise, Werner Flanges Inc. is committed to quality, fast delivery, and client satisfaction across India and international markets. Every flange we supply undergoes rigorous inspection and testing to ensure it meets project specifications and international quality standards. As your trusted AS 4087 PN16 & PN21 flange supplier in Mumbai, we are ready to support your next project with reliable solutions and competitive pricing. To request a quote or speak with our experts, reach out to us at sales@wernerflanges.com — we’re here to help you source the right flange for every connection.

Werner Flanges Inc. is one of the leading manufacturers and suppliers of Duplex Steel AS 4087 PN16 Weld Neck Flanges, Industrial AS 4087 PN16 Flanges, High Pressure AS 4087 PN16 WNRF Flanges, Inconel 601 AS 4087 PN16 Slip On Raised Face Flanges, Hastelloy C276 AS 4087 PN16 Lap Joint Raised Face Flanges, Monel K500 AS 4087 PN16 Long Weld Neck Flanges, Carbon Steel AS 4087 PN16 Blind Raised Face Flanges, Stainless Steel 316 AS 4087 PN16 Screwed Flanges, Titanium AS 4087 PN16 Weld Neck Flanges, Duplex Steel AS 4087 PN21 Weld Neck Flanges, Industrial AS 4087 PN21 Flanges, High Pressure AS 4087 PN21 WNRF Flanges, Inconel 601 AS 4087 PN21 Slip On Raised Face Flanges, Hastelloy C276 AS 4087 PN21 Lap Joint Raised Face Flanges, Monel K500 AS 4087 PN21 Long Weld Neck Flanges, Carbon Steel AS 4087 PN21 Blind Raised Face Flanges, Stainless Steel 316 AS 4087 PN21 Screwed Flanges, Titanium AS 4087 PN21 Weld Neck Flanges, and many more.

AS 4087 PN16 & PN21 Flanges Technical Specifications

Specification	Details
Standard	AS 4087 (PN16 & PN21)
Flange Types	Weld Neck (WN), Slip-On (SO), Blind (BL), Socket Weld (SW), Threaded (TH), Lap Joint (LJ)
Pressure Ratings	PN16 (16 bar), PN21 (21 bar)
Size Range	DN 80 to DN 1200 (custom sizes available on request)
Facing Types	Raised Face (RF), Flat Face (FF)
Manufacturing Process	Forged / Machined to precise tolerances
Testing & Certification	EN 10204 3.1 / 3.2, Hydrostatic Testing, PMI Testing, Ultrasonic Testing, Third-Party Inspection

Material Specifications for AS 4087 PN16 & PN21 Flanges

Type of Materials	Common Specifications / Customization Available on Request * Materials conform to ASTM/ASME standards and are compatible with AS/NZS 4331.1 Flanges
Duplex Steel	ASTM/ASME A182 F51, F60, F61, UNS S31803, UNS S32205
Super Duplex Steel	ASTM/ASME A182 F53, F55, UNS S32750, UNS S32760, F44 (6Mo)
Stainless Steel	ASTM/ASME A182 F304, F304L, F316, F316L, F310, F317L, F321, F347
Carbon Steel	ASTM A105, A350 LF1, LF2, LF3, A266 Class 1/2, A694 F42 to F70, A765 Gr. II
Alloy Steel	ASTM/ASME A182 F1, F5, F9, F11, F12, F22
Non-Ferrous Alloys	Titanium, Brass, Admiralty Brass, Copper Nickel, Nickel Alloys, Hastelloy
Titanium	ASTM/ASME B381 Gr.1, Gr.2, Gr.5, Gr.7, Gr.12, Gr.16
Copper Nickel	ASTM B151 UNS C70600 (Cu-Ni 90/10), C71500 (Cu-Ni 70/30)
Brass, Al-Brass	ASTM B152 UNS C26000, C27200, C28000; ASTM B111 for Al-Brass
Nickel Alloys	ASTM B160, B161, B564 – UNS N02200, N02201, N04400, N08800, N08825, N06600, N06601, N06625, Monel K500
Alloy 20	ASTM B462 UNS N08020
Hastelloy	ASTM B564 UNS N10276 (Hastelloy C276), N06022 (Hastelloy C22)
Cladded Materials	ASTM B898, B265, B424 or custom explosion/clad bonding using dissimilar metals
Cladded Materials	Titanium-Steel, Nickel-Steel, Titanium-Copper, Stainless Steel-Carbon Steel, Bimetallic/Trimetallic Combinations

Types of AS 4087 PN16 & PN21 Flanges

AS 4087 PN16 Weld Neck Flanges (WN)
AS 4087 PN21 Slip-On Flanges (SO)
AS 4087 PN16 Blind Flanges (BL)
AS 4087 PN21 Socket Weld Flanges (SW)
AS 4087 PN16 Threaded Flanges (TH)
AS 4087 PN21 Lap Joint Flanges (LJ)
AS 4087 PN16 Reducing Flanges
AS 4087 PN21 Ring Type Joint Flanges (RTJ)
AS 4087 PN16 Flat Face Flanges (FF)
AS 4087 PN21 Raised Face Flanges (RF)
AS 4087 PN16 Long Weld Neck Flanges (LWN)
AS 4087 PN21 Orifice Flanges
AS 4087 PN16 Expander Flanges
AS 4087 PN21 High Hub Blind Flanges

Industries and Applications of AS 4087 PN16 & PN21 Flanges:

Industry	Application
Oil & Gas Industry	Widely used in pipeline systems, processing units, and high-pressure flow lines across upstream, midstream, and downstream operations.
Water Treatment & Desalination	Ideal for water supply networks, desalination plants, and sewage treatment facilities requiring high-pressure and corrosion-resistant piping connections.
Power Generation	Used in thermal, hydro, and nuclear power plants for steam lines, condensate systems, and high-pressure piping circuits.
Chemical & Petrochemical Plants	Applied in corrosive chemical processing systems, reactors, and heat exchangers handling aggressive media under high pressure.
Marine & Offshore Engineering	Suited for saltwater cooling systems, ballast piping, and pressure vessels in ships and offshore oil platforms.
Food & Beverage Industry	Used in clean-in-place (CIP) and high-pressure processing pipelines where hygiene and corrosion resistance are vital.
Pharmaceutical Industry	Ensures sterile fluid transfer and pressure control in cleanroom piping systems and drug manufacturing equipment.
Mining & Mineral Processing	Used for slurry transport lines, tailing systems, and high-abrasion ore processing pipelines in mining plants.
HVAC & Fire Protection Systems	Installed in high-pressure chilled water systems, heating lines, and fire protection networks for reliable performance and sealing.

Frequently Asked Questions (FAQs) about AS 4087 PN16 & PN21 Flanges

1. What is the AS 4087 flange standard?: AS 4087 is an Australian Standard that specifies the dimensions and pressure ratings for metallic flanges used in pipelines and valves, primarily for water supply and wastewater systems. It includes pressure ratings such as PN16 and PN21.
2. What is the difference between PN16 and PN21 flanges?: PN16 flanges are rated for 16 bar (approximately 232 psi), while PN21 flanges are designed to handle pressures up to 21 bar (approximately 305 psi). The choice depends on the pressure requirements of your piping system.
3. What materials are commonly used for AS 4087 PN16 & PN21 flanges?: Common materials include carbon steel, stainless steel, duplex steel, Inconel, Monel, Hastelloy, and copper nickel. Material selection depends on the medium being transported and environmental conditions.
4. In which industries are AS 4087 flanges used?: AS 4087 PN16 & PN21 flanges are widely used in water treatment, desalination, firefighting systems, HVAC, power plants, marine, and other industrial pipeline applications.
5. Are AS 4087 flanges compatible with other international flange standards?: AS 4087 flanges are specific to Australian standards, but in some cases, they may be dimensionally similar to ISO or DIN flanges. Compatibility should be confirmed by checking dimensions and pressure ratings.
6. What types of flanges are available under AS 4087 PN16 & PN21?: Available types include weld neck, slip-on, blind, socket weld, threaded, lap joint, raised face, flat face, and orifice flanges, suitable for various piping configurations.
7. Where can I purchase certified AS 4087 PN16 & PN21 flanges?: You can buy certified AS 4087 flanges from reputable manufacturers like Werner Flanges Inc. For orders or inquiries, contact sales@wernerflanges.com.