Flanges
ISO 9001:2015Certified Quality
MTC EN 10204 3.1Mill Certified
100% PMI TestedXRF Analyzed
ASTM / ASMEGlobal Standards
Product Details & Specs
Flanges
We manufacture and supply a complete range of pipe flanges including weld neck, slip-on, blind, socket weld, and threaded flanges. Our flanges are available in all standard sizes, pressure classes, and material grades. Each flange is precision machined to ensure perfect fit and leak-proof connections.
Key Specifications
- Sizes: 1/2" - 48" (DN15 - DN1200)
- Pressure Class: 150# - 2500#
- Facing: RF, FF, RTJ
- Coating: Anti-rust oil, Black paint, Galvanized
Technical Specification Table
ASME B16.5 Class 150 & 300 Raised Face (RF) Flange Dimension Matrix
Standard dimension and weight charts for engineering calculations and procurement sizing.
| Nominal Size | OD Flange (mm) | PCD Bolt Circle (mm) | Number of Holes | Bolt Hole Dia (mm) | Class 150 Thickness (mm) | Class 300 Thickness (mm) |
|---|---|---|---|---|---|---|
| 1/2" (DN15) | 89.0 mm | 60.3 mm | 4 Holes | 15.9 mm (5/8") | 11.1 mm | 14.3 mm |
| 3/4" (DN20) | 98.4 mm | 69.8 mm | 4 Holes | 15.9 mm (5/8") | 12.7 mm | 15.9 mm |
| 1" (DN25) | 108.0 mm | 79.4 mm | 4 Holes | 15.9 mm (5/8") | 14.3 mm | 17.5 mm |
| 1-1/2" (DN40) | 127.0 mm | 98.4 mm | 4 Holes | 15.9 mm (5/8") | 17.5 mm | 20.6 mm |
| 2" (DN50) | 152.4 mm | 120.6 mm | 4 Holes | 19.0 mm (3/4") | 19.0 mm | 22.2 mm |
| 3" (DN80) | 190.5 mm | 152.4 mm | 4 Holes (Cl 150) / 8 (Cl 300) | 19.0 mm (3/4") | 23.8 mm | 28.6 mm |
| 4" (DN100) | 228.6 mm | 190.5 mm | 8 Holes | 19.0 mm (3/4") | 23.8 mm | 31.8 mm |
| 6" (DN150) | 279.4 mm | 241.3 mm | 8 Holes (Cl 150) / 12 (Cl 300) | 22.2 mm (7/8") | 25.4 mm | 36.5 mm |
| 8" (DN200) | 342.9 mm | 298.4 mm | 8 Holes (Cl 150) / 12 (Cl 300) | 22.2 mm (7/8") | 28.6 mm | 41.3 mm |
* Custom thicknesses, non-standard schedules, and special cuts are available on request.
Available Types
Flanges Types
Weld Neck Flanges
Slip-On Flanges
Blind Flanges
Socket Weld Flanges
Threaded Flanges
Lap Joint Flanges
Orifice Flanges
Long Weld Neck Flanges
Material Grades
- Stainless Steel: F304, F304L, F316, F316L, F321, F347
- Duplex Steel: F51, F60
- Super Duplex: F53, F55
- Carbon Steel: A105, A350 LF2
- Alloy Steel: F11, F22, F91
- Nickel Alloy: 200, 201
- Inconel: 600, 625
- Monel: 400
- Hastelloy: C276
- Titanium: Gr.2, Gr.5
Standards & Specifications
ANSI/ASME B16.5ANSI/ASME B16.47MSS SP-44API 605DIN 2501EN 1092-1BS 4504
Sizes Available
- 1/2" to 48"
- 150# to 2500#
- Custom sizes on request
Industries
Applications
Pipeline Connections
Pressure Vessels
Valve Connections
Pump Connections
Heat Exchangers
Boiler Systems
Offshore Risers
Frequently Asked Questions
Frequently Asked Technical Questions about Flanges
We supply Raised Face (RF with standard spiral serration 125-250 AARH), Flat Face (FF), and Ring Type Joint (RTJ for high-pressure Class 600# to 2500#).
Need Flanges with Mill Test Certificates?
Contact our sales desk at CP Tank, Mumbai for competitive wholesale rates, ready stock verification, and custom cut lengths.