ANSI CL 400–600 Flanges | ASME B16.5 Flange Supplier

ANSI CL 400–600 Flanges – High-Pressure ASME B16.5 Flanges

ANSI CL 400–600 flanges are designed to perform under high-pressure conditions and are governed by the ASME B16.5 standard. These flanges ensure a reliable, leak-proof joint in piping systems subjected to pressures up to 600 psi. Werner Flanges Inc. supplies precision-engineered ANSI 400 and 600 flanges in various face types, sizes, and drilling templates. These are widely used where enhanced mechanical strength and durability are critical.

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Industries such as petrochemical, refinery, power generation, offshore, LNG, and shipbuilding frequently use Class 400 and Class 600 ANSI flanges due to their capability to endure high pressure and temperature fluctuations. They are essential for flanged joints in pumps, valves, pipelines, and pressure vessels in critical service applications.

Werner Flanges Inc. maintains extensive stock of ANSI CL 400–600 flanges in a wide range of sizes (½” to 24″), material grades, and pressure classes. Our product range includes weld neck, slip-on, socket weld, blind, threaded, and lap joint flanges with face types such as RF, FF, and RTJ. Custom sizes, drilling patterns, and coatings are also available on Request

As a globally trusted manufacturer and exporter, Werner Flanges Inc. delivers top-tier ANSI flanges engineered for demanding industrial conditions. With a commitment to quality, we provide mill test certificates, dimensional reports, and third-party inspections as needed. Our in-house manufacturing and fast global logistics make us a preferred partner for large-scale industrial projects.

ANSI CL 400–600 Flanges – High-Pressure ASME B16.5 Flanges Technical Specifications

Specification	Details
Standard	ASME B16.5 / ANSI B16.5
Flange Types	Weld Neck, Slip-On, Socket Weld, Blind, Threaded, Lap Joint
Pressure Ratings	Class 400 / Class 600
Size Range	½” to 24″ (DN15 to DN600)
Facing Types	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Manufacturing Process	Forged / Machined
Testing & Certification	EN 10204 3.1/3.2, NACE MR0175, PED, ISO, IBR

Material Specifications for ANSI CL 400–600 Flanges – High-Pressure ASME B16.5 Flanges

Type of Materials	Common Specifications / Customization Available on Request
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 ANSI CL 400–600 Flanges – High-Pressure ASME B16.5 Flanges

ANSI CL400 Flange
ANSI CL600 Flange
ASME B16.5 High-Pressure Flange
ANSI Weld Neck Flange
Class 400/600 Pipe Flanges
ANSI Raised Face Flange
ANSI RTJ Flange

Industries and Applications of ANSI CL 400–600 Flanges – High-Pressure ASME B16.5 Flanges

Industry	Application
Oil & Gas Industry	Used extensively in upstream, midstream, and downstream operations for high-pressure piping and processing systems requiring robust sealing solutions.
Petrochemical & Chemical Processing	Ideal for handling corrosive chemicals and high-temperature pipelines in refining and chemical manufacturing processes.
Power Generation	Installed in thermal, nuclear, and hydroelectric power plants for critical pressure applications and steam systems.
Water Treatment & Desalination	Used in high-pressure water distribution, desalination, and wastewater treatment pipelines ensuring durability and leak resistance.
Marine & Offshore Industry	Suitable for seawater piping systems, ballast systems, and pressure vessels in marine engineering and offshore platforms.
Pharmaceutical Industry	Ensures sanitary, high-pressure fluid handling in sterile environments and cleanroom process systems.
Food & Beverage Industry	Used in hygienic and high-pressure processing lines where corrosion resistance and strength are critical.
Mining & Mineral Processing	Supports slurry transport systems and ore processing pipelines in mining operations.

Frequently Asked Questions (FAQs) about ANSI CL 400–600 Flanges – High-Pressure ASME B16.5 Flanges

Q1: What is the pressure rating for ANSI CL 400 and CL 600 flanges?
A: Class 400 flanges are rated for up to ~400 psi and CL 600 flanges for up to ~600 psi, depending on temperature and material.

Q2: What sizes are available for ANSI CL 400–600 flanges?
A: Werner Flanges Inc. supplies sizes from ½” to 24″, with larger sizes available on request.

Q3: Are these flanges compatible with ASME B16.5 standards?
A: Yes, both Class 400 and 600 flanges fully comply with ASME B16.5 specifications.

Q4: What materials are available for these flanges?
A: We offer carbon steel, stainless steel, alloy steel, duplex, and nickel alloy materials.

Q5: Can ANSI 400/600 flanges be used in high-temperature services?
A: Yes, especially when made from alloy or stainless steel materials like F11 or F316.

Q6: Do you provide NACE-compliant flanges?
A: Yes, we offer flanges compliant with NACE MR0175 for sour service applications.

Q7: What documentation comes with the flanges?
A: We provide EN 10204 3.1/3.2 certificates, test reports, dimensional checks, and third-party inspection if required.