ASME B16.5 Flange
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ASME B16.5 Flange
ASME B16.5 Flange Manufacturer & Supplier
ASME B16.5 Flanges are the most widely specified pipe flanges in industrial piping, covering sizes from NPS 1/2" to NPS 24". The standard defines the dimensions, tolerances, facing types, pressure-temperature ratings, materials, and testing requirements for flanges and flanged fittings, giving engineers a single reference for interchangeable, leak-tight connections across almost every process piping application.
At Royal Steel India, we manufacture ASME B16.5 flanges in Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint and Reducing configurations, in a full range of facing types and pressure classes. Every flange is forged from certified raw material and precision machined to ensure a consistent bolt circle, sealing face finish, and wall thickness, so it mates correctly with mating flanges and valves from any compliant manufacturer.
Our ASME B16.5 flanges are supplied in Stainless Steel, Carbon Steel and Alloy Steel grades for oil & gas, petrochemical, power generation, chemical processing, marine, offshore, water treatment, and general industrial piping projects worldwide.
Types of ASME B16.5 Flanges
Our comprehensive flange product range includes:
Stainless Steel Reducing Flange
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Stainless Steel Weld Neck Flange
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Spades Ring Spacers Flanges
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Stainless Steel Blind Flange
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Carbon Steel Orifice Flange
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ASME B16.5 Square Flanges
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Spectacle Blind Flanges
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Stainless Steel Slip On Flange
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Stainless Steel Plate Flange
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Nipo Flange
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Studding Outlet Flange
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ASME B16.5 Flanges
Read MoreASME B16.5 Flange Specifications
ASME B16.5 Flange Dimensions
ASME B16.5 flanges are manufactured to the dimensional tables set out in the standard, covering nominal pipe sizes from NPS 1/2" to NPS 24" across Class 150 to Class 2500.
Dimension charts generally include:
- Nominal Pipe Size (NPS)
- Outside Diameter (OD)
- Bore Diameter
- Wall Thickness
- Bolt Circle Diameter (BCD)
- Number & Diameter of Bolt Holes
- Hub Diameter & Length
- Flange Thickness
- Weight
Detailed dimension tables and engineering drawings are available upon request.
Facing Types
ASME B16.5 flanges are available with the following sealing face options:
- Flat Face (FF)
- Raised Face (RF)
- Tongue Face (TF)
- Grooved Face (GF)
- Spigot Face
- Recess Face
- Ring Recess Face
- O-Ring Groove Face
Available Material Grades
Stainless Steel
- ASTM A182 F304
- ASTM A182 F304L
- ASTM A182 F304H
- ASTM A182 F310
- ASTM A182 F316
- ASTM A182 F316L
- ASTM A182 F321
- ASTM A182 F347
- ASTM A182 F410
Carbon Steel
- ASTM A105
- ASTM A350 LF1
- ASTM A350 LF2
- ASTM A350 LF3
- ASTM A350 LF6
- ASTM A694 F42
- ASTM A694 F46
Alloy Steel
- ASTM A182 F1
- ASTM A182 F5
- ASTM A182 F9
- ASTM A182 F11
- ASTM A182 F22
- ASTM A182 F91
- ASTM A182 F92
- ASTM A707
Pressure Classes
Available in the following pressure ratings to suit different service conditions.
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
Key Features
- Manufactured according to ASME B16.5 standard
- Wide range of facing types for every sealing requirement
- Precision-machined bolt circle and sealing face
- High mechanical strength and dimensional accuracy
- Excellent corrosion resistance
- Leak-proof flange connections
- Suitable for high-pressure and high-temperature applications
- Interchangeable with other ASME B16.5 compliant flanges
- Custom sizes and material grades available
Inspection & Testing
Every ASME B16.5 flange undergoes rigorous quality inspection before dispatch. Testing includes:
- Positive Material Identification (PMI)
- Visual Inspection
- Dimensional Inspection
- Hydrostatic Testing
- Ultrasonic Testing (UT)
- Radiographic Testing (RT) / X-Ray Detection
- Hardness Testing
- Chemical & Mechanical Testing
- Material Test Certificate (EN 10204 3.1B)
- Third-Party Inspection
Applications
ASME B16.5 flanges are widely used in:
- Oil & Gas Pipelines
- Petrochemical Plants
- Refineries
- Power Generation Plants
- Chemical Processing Plants
- Marine Industry
- Offshore Platforms
- Water Treatment Plants
- Pharmaceutical Industry
- General Industrial Piping Systems
Standards & Compliance
Our ASME B16.5 flanges comply with:
- ASME B16.5
- EN 1092-1
- DIN 2633
- API Standards
- BS 10 Table D
- MSS SP-44
- EN 10204 3.1B Certification
Why Choose Our ASME B16.5 Flanges?
We manufacture and supply premium-quality ASME B16.5 flanges using certified raw materials and advanced forging and machining technology. Every flange is precision-engineered to deliver a consistent sealing face, accurate bolt circle, and reliable performance across the full range of pressure classes.
With strict quality control, competitive pricing, timely delivery, worldwide exports, and customized manufacturing capabilities, we are a trusted flange partner for industrial piping projects across the oil & gas, petrochemical, power, and marine sectors.
Frequently Asked Questions
What is ASME B16.5?
ASME B16.5 is an international standard covering pipe flanges and flanged fittings from NPS 1/2" to NPS 24", including dimensions, tolerances, materials, pressure-temperature ratings, marking, and testing requirements.
What facing types are available?
We supply ASME B16.5 flanges in Flat Face (FF), Raised Face (RF), Tongue Face (TF), Grooved Face (GF), Spigot, Recess, Ring Recess and O-Ring Groove facings.
Which materials are available?
We manufacture ASME B16.5 flanges in Stainless Steel, Carbon Steel and Alloy Steel grades, including ASTM A105, A350, A694, A182 and A707.
Which pressure classes are available?
Our ASME B16.5 flanges are available in Class 150, 300, 600, 900, 1500 and 2500.
What is the difference between ASME B16.5 and ASME B16.47?
ASME B16.5 covers smaller pipe flanges from NPS 1/2" to NPS 24", while ASME B16.47 covers large-diameter flanges from NPS 26" to NPS 60" in Series A and Series B designs.
Which industries use ASME B16.5 flanges?
These flanges are widely used in oil & gas, petrochemical, power generation, chemical processing, marine, offshore, water treatment and other industrial piping systems.
Need a Quote on ASME B16.5 Flanges?
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