Forged Flanges Manufacturer

Forged flanges are manufactured through hot forging or cold forging processes, where metal billets (such as stainless steel or carbon steel) are plastically deformed under high pressure to achieve the final flange shape.

Forged flange

Forged Flanges Supplier

SSM specializes in manufacturing forged steel flanges and forgings, equipped with industry-leading production and machining facilities, including:

  • Large-scale free forging hammers and vertical ring grinders
  • 630-ton electric screw precision forging production line
  • 1600-ton robotic screw automatic die-forging production line
  • Medium/high temperature heat treatment furnaces
  • Full CNC machining centers (gantry/vertical/horizontal heavy-duty machine tools)
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Our Forged Flange Production Capabilities

FLANGES AND RINGS

  • Diameter range: 50mm to 8000mm

DIE FORGINGS

  • Single piece weight: 1 kg to 1820 kg

FREE FORGINGS

  • Products include: shafts, blocks, barrels, cylinders
  • Max dimensions: up to 5000mm
  • Max single weight: up to 9000 kg
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forged flange ability

Forged Flange Product Center

SSM can manufacture flanges in a wide range of standards, including ANSI, ASME, AWWA, BS, DIN, JIS, EN, ISO, and GB. We also offer customized flanges. Sizes range from 1/2” to 160”, with pressure ratings from 150# to 2500# and PN0.25 to PN100. Materials include carbon steel, stainless steel, duplex stainless steel, and alloy steel, and surface treatments can be applied according to your requirements. In the table below, we believe you will find the products you need.

StandardSizePressureFlange Style
ASME   B16.51/2〞–24〞150LB—2500LBWelding Neck; Slip On; Blind; Socket Welding; Threaded; Lap Joint.
ASME B16.47 SER A26〞–60〞150LB—900LBWelding Neck; Slip On; Blind.
ASME B16.47 SER B26〞–60〞75LB—300LBWelding Neck; Slip On; Blind.
AWWA   C2071/2〞–120〞86psi—275psiSlip On; Blind.
BS329326〞–60〞150LB—600LBWelding Neck; Slip On.
SL WN FLANGE1/2〞–24〞150LB—2500LBLong Welding Neck.
BS45041/2〞–160〞PN6—PN40101; 105; 111; 112; 113
BS101/2〞–24〞 Table E; Table D; Table F; Table H
DIN1/2〞–160〞PN6—PN4002635; 2527; 2576; 2566; 86030; 2642
JIS1/2〞–24〞5K—63KPlate; Slip On; Welding Neck; Socket Welding; Blind.
NFE  292031/2〞–24〞PN6—PN25Welding Neck; Slip On; Blind; Socket Welding; Threaded; Lap Joint.
UNI1/2〞–24〞PN6—PN100Welding Neck; Slip On; Blind; Threaded; Plate.
EN1092－11/2〞–160〞PN6-PN40Type 01; Type 02; Type 04; Type 05; Type 11; Type 12; Type 13; Type 21; Type 32
ISO 7005-11/2〞–160〞PN6-PN420Type 01; Type 02; Type 03; Type 05; Type 11; Type 12; Type 13; Type 14; Type15
12820/12821-801/2〞–24〞PN6—PN25Plate; Slip On; Welding Neck
AS 21291/2〞–120〞 Table A; Table E; Table D; Table F
AS40872〞–48〞PN16—PN35Welding Neck; Slip On; Blind
SABS 11231/2〞–144〞250kpa-6400kpaWelding Neck; Plate; Blind; Loose; Integral; Boss.
GB1/2〞–120〞PN0.25—PN42Welding Neck; Slip On; Blind; Socket Welding; Threaded; Lap Joint.
HG1/2〞–80〞PN0.25—PN42Welding Neck; Slip On; Blind; Socket Welding; Threaded; Lap Joint.
JB1/2〞–64〞PN0.25—PN42Welding Neck; Slip On; Blind; Socket Welding; Threaded; Lap Joint.
GD1/2〞–100〞PN0.25—PN42Welding Neck; Slip On; Blind; Socket Welding; Threaded; Lap Joint.
MaterialCarbon SteelA105，C22.8，C21， Rst37.2，S235JRG2，P355NH，P265GH，SS400，1.0565，20#，Q235 etc.
Stainless SteelF304，F304L，F316，F316L，F316Ti，F321，F317L，F44，1.4541，1.4571，1.4404，1.4401 etc.
Duplex Stainless SteelASTM A182 F51/UNS S31803， F53/UNS S32750，F55/UNS S32760 ，A182 F60 etc.
Alloy Steel.A350LF2，AISI 8630，AISI 4130，ASTM 4140，A182-F11，A182-F12，ASTM A694 F52，F60，F65，F70，1Cr5Mo，1Cr9Mo，15CrMo，  42CrMo，12Cr1MoV， etc.
Surface TreatmentRustproof Oil，Black， Yellow，Blue， Green or Red Painting，Lacquer，Electrical Galvanize，Hot Galvanizing or Shot Blassing treatment，Coating Nylon
Flanges FacingsFF，RF，RTJ/RJ， Male&Female，Tongue&Groove.

Hot-selling forged flange products

A105 Forged Steel Flanges

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carbon steel flange

Carbon Steel Forged Flanges

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China Forged Blind Flange

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150# a105 weld neck flange

Forged Weld Neck Flange

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Forged DN4000 Lap Flange

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Forged Flanges and Fittings

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stainless steel flange for sale

Forged Stainless Steel Flanges

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orifice flange

Forgings Steel Orifice Flanges

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WNRF A182 F304 304 CL150 8 SCH10S ASME B16.5 

ANSI B16.5 Class 150 Forged Flanges

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Slip on flange

Slip On Forged Steel Flange

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DN 50 PN16 RF 904L Plate Flanges

904L Forged Steel Flanges

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Duplex Steel Nickel-Based Alloy Stainless Steel Spade Flange

Alloy Steel Forged Flanges

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ASTM A182 F51 2205 ASTM B16.5 CALSS 2500 RTJ FLANGEOLET

ASTM A182 F51/F53/F55 Forged Flange

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MSS SP 97 A182 f51 90deg 2”×34”6000lbs SW Olet

Slip On Forged Steel Flange

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The Difference Between Class 300 and 600 Flange

Class 600 ANSI B16.5 Forged Flanges

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F321H Forged Flanges

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long weld neck flange

Forged Long Weld Neck Flange

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Threaded Flange

Slip On Forged Steel Flange

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Socket Weld Flange

Forged Socket Weld Flange

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Forged Spectacle Blind Flange

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One-Stop Forged Flange Provider for All Your Needs

SSM has significant product advantages in manufacturing forged flanges. Whether it’s quality or price, we will meet your needs.

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Forged Flagnes Manufacturing Process

1Forge Flange Manufacture Process Materials -1
4Forge Flange Manufacture Material Inspection -2
5Forge Flange Manufacture Material Cutting -1
9Forge Flange Manufacture Material Forging -1
12Forge Flange Manufacture Material Forging -4
13Forge Flange Manufacture Process Heat Treatment - 1
15Forge Flange Manufacture Process Machining -1
21Forge Flange Manufacture Process Drilling -1
25Forge Flange Manufacture Process Inspection -3
30Forge Flange Manufacture Process Inspection -8
35Forge Flange Manufacture Process Packing -1
37Forge Flange Manufacture Process Packing -3

We manufacture forged flanges through a series of carefully controlled steps to ensure the final product meets your expectations. The process includes raw material procurement, raw material inspection, cutting, heating, forging, heat treatment, machining, initial inspection, drilling, final inspection, marking, surface treatment, and packaging. The following images offer an overview of our production process — for more details, please refer to this article.

Forged Flange Qualification

SSM provides a full range of inspections, tests, and certifications for flanges to ensure compliance with specific standards or your requirements, including:

  • Material certificates (e.g., EN 10204 3.1 / 3.2)
  • Dimensional inspection
  • Non-destructive testing (such as ultrasonic and radiographic testing)
  • Pressure testing
  • Heat treatment records
  • Standard compliance (e.g., ASME B16.5, EN 1092-1, etc.)
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DIMENSION INSPECTION
DIMENSION INSPECTION
MT
MT
PMI
PMI
ROUGHNESS INSPECTION
ROUGHNESS INSPECTION
SURFACE HARDNESS TEST
SURFACE HARDNESS TEST

FAQ

A forged flange is manufactured by shaping metal (carbon steel, stainless steel, or alloy steel) under high pressure, creating superior strength and durability compared to cast flanges.

✔ Higher strength (30%+ stronger than cast flanges)
✔ Better fatigue resistance for high-pressure applications
✔ Tighter tolerances (per ASME/EN standards)
✔ No internal defects (porosity, cracks, or impurities)

Yes! We provide:

  • Non-standard sizes (up to DN4000)
  • Special face finishes (RTJ, FF, Grooved)
  • Material certifications (MTC 3.1/3.2)

  • Standard flanges: 4–6 weeks

  • Custom orders: 8–12 weeks

The 150# pressure rating indicates that the flange can withstand a specific range of pressures, making it suitable for medium-pressure piping systems. The exact pressure range varies depending on the standards and dimensions.

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