ASME/ANSI Standard & Custom Engineered Non-Standard Industrial Flanges
Standards: ASME B16.5, ASME B16.47 (Series A & B), MSS SP-44, API 605.
Types: Weld Neck (WN), Slip-on (SO), Blind (BL), Socket Weld (SW), Threaded (TH), Lap Joint (LJ).
Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500.
Materials:
Stainless Steel: ASTM A182 F304/L, F316/L, F321.
Carbon Steel: ASTM A105, A350 LF2, A694.
Alloy Steel: ASTM A182 F1, F5, F9, F11, F22.
Size Range: 1/2″ to 120″ (DN15 – DN3000).
Production Description
The forged steel flanges are suitable for the connection of steel pipes conveying mediums such as steam, oil, air, and water. They are widely used in the oil gas Chemical industry and Shipbuilding.
Manufacturing Standards Referred
- ASME B16.5: Dimension standard for steel pipe flanges and flanged fittings
- ASME B16.47: Large diameter steel flanges NPS 26 to NPS 60
- MSS-SP44: For steel pipeline flanges
- API 605: For large diameter carbon steel flanges
Types of Forged Flanges
Industrial welded forged flanges come in many different types. Each species meets its special requirements. For example, long weld neck flanges are attached to the necks of the pipes.
There is also have weld neck flange
Specification
| Industrial Steel Forged Flange | |||||||||||
| Standard | ASME/ANSI B 16.5 | ASME B 16.47 | ASME B 16.48 | GOST 12821 | GOST 12820 | GOST 33259 | EN 1092 | DIN | JIS | SABS/SANS 1123 | BS 4504 |
| Size | 1/2″-24″ | 26″-60″ | 1/2″-24″ | DN10-DN1200 | DN10-DN1200 | DN10-DN2400 | DN10-DN2000 | DN10-DN2000 | DN10-DN1500 | DN10-DN600 | DN10-DN4000 |
| Pressure | Class 150 300, 400 600, 900 and 2500 | Class 75 150, 300 400, 600 and 900 | Class 150 300, 400 600, 900 and 2500 | PN6, PN10 PN16, PN25 PN40, etc | PN6, PN10, PN16, PN25 | PN6, PN10, PN16, PN25, PN40, etc | PN6, PN10 PN16, PN25 PN40, etc | PN6, PN10, PN16, PN25, PN40, etc | 5KG, 10KG 16KG, 20KG 30KG, 40KG etc | 1600/3 1600/4 Table D Table E | PN 2.5 PN6, PN10 PN16, PN25 PN40, etc |
| Material | Carbon steel: Steel 20#, A105, A105N, Q235, 16Mn, Q345, etc Alloy steel: ASTM A182 F11, F22, LF2 Stainless steel: 304/L, 316/316L | ||||||||||
| Flange Type | Weld Neck Flange, Slip-on Flange, Socket Welding Flange, Plate Flange, Blind Flange, Lap Joint Flange, Threaded Flange, Orifice Flange, Spectacle Flange, Stub End, Weld Neck Collar, Welding-on Collar | ||||||||||
| Sealing Face | Raised Face (RF), Flat Face(FF), Ring Joint Face(RTJ), Male Face-Female Face(SMF), Tongue Face & Groove Face | ||||||||||
| Surface Treatment | Anti-rust Oil, H.D.G., Black Painting, Yellow Painting, Red Painting, Etc | ||||||||||
| Technique | Cutting – Heat Treatment – Forging – Machining – Drilling – Painting | ||||||||||
| Certificates | ISO 9001, CE, GOST-R, CCS, EN 10204/3.1B, MTC, Radiography Test Report, Ultrasound Test Report, SGS and other third party Inspection Reports | ||||||||||
| Package | Pallets, Plywood Case, etc | ||||||||||
| Application | Petroleum, Natural Gas, Water Disposal, Shipbuilding, Nuclear Energy, Chemical Engineering, Deckle, Electric Power | ||||||||||
Surface Treatment


Production process

Industrial Forged Flanges Key Applications:
1. Oil and Gas Industry:
Forged flanges are essential in oil and gas extraction, transportation, and refining processes. Their ability to withstand high pressure and temperature makes them suitable for pipelines, refineries, and offshore platforms.
2. Petrochemical and Chemical Plants:
These welded forged flanges are used to connect pipes and equipment handling corrosive chemicals in petrochemical and chemical processing plants. Materials like stainless steel and specialized alloys are often employed for their corrosion resistance.
3. Power Generation:
Forged flanges play a vital role in power plants, including nuclear, thermal, and hydroelectric facilities. They connect piping systems transporting steam, water, and other fluids under high pressure and temperature.
4. Water Treatment and Distribution:
They are used in water and wastewater treatment plants to ensure reliable fluid transport in pipelines and systems.
5. Shipbuilding and Marine Applications:
In marine environments, forged flanges provide durable and corrosion-resistant connections in pipelines on ships and submarines.
6. Food and Pharmaceutical Industries:
Where hygiene and corrosion resistance are critical, forged flanges, particularly those made of stainless steel, are used in processing equipment for handling sensitive liquids and gases.
7. HVAC Systems:
Forged flanges are also used in heating, ventilation, and air conditioning (HVAC) systems for reliable connections in piping networks.
8. Structural Applications:
In some cases, forged flanges are used in structural frameworks for added support and stability.
Why order forged Flanges in Bulk from RAYOUNG?
Custom Non-Standard Expertise:
“Beyond standard dimensions, HB Steel excels in non-standard flange fabrication. Whether it’s unique bore diameters, special facing, or oversized diameters up to 5 meters, our in-house CNC machining center ensures ±0.5mm precision for your custom project requirements.”Quality Assurance & Traceability:
“Every flange undergoes rigorous testing, including Ultrasonic Testing (UT), Magnetic Particle Inspection (MPI), and PMI for material grade verification. Full MTC (Material Test Certificates) to EN 10204 3.1 are provided with every shipment, ensuring compliance for high-pressure applications.”Distributor Support & Logistics:
“We understand the needs of global stockists. With optimized production lead times and robust seaworthy packaging, we support private labeling and neutral marking for distributors worldwide.”

Cooperate with Rayoung, you will enjoy the following benefits.
Rayoung–A leading Butt Weld pipe fittings, flanges and steel pipes supplier& factory in China.
We’re here to help with your industry pipe fittings and flange needs. Rayoung has been in the business of industrial pipe fittings since 1983, and we’re confident we can help you find a solution more quickly, affordably, and with greater expertise than the competition.
We’d love to learn more about your project today!
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