ASTM A182 F9 is a specification for forged or rolled alloy-steel pipe flanges, forged fittings, and valves and parts for high-temperature service. The F9 designation specifically refers to the alloy steel grade, which in this case, is a chromium-molybdenum alloy steel. Here are some key aspects of ASTM A182 F9 Alloy Steel Flanges:

Types of Alloy Steel F9 Flanges:

  1. Weld Neck Flanges (WNRF): These flanges are designed to be butt-welded to the end of the pipe, providing a smooth and gradual transition from the pipe to the flange.
  2. Slip-On Flanges (SORF): These flanges are slipped over the pipe and then welded on both sides to provide strength and prevent leakage.
  3. Blind Flanges (BLRF): Blind flanges are used to seal the end of a pipe, making them suitable for applications where the end needs to be closed off.
  4. Socket Weld Flanges (SWRF): These flanges are designed for use with smaller-sized pipes and have a socket that the pipe is inserted into and then welded.
  5. Threaded Flanges (THRF): Threaded flanges have internal threads that match the external threads on the pipe, allowing them to be screwed onto the pipe.
  6. Lap Joint Flanges (LJRF): Lap joint flanges are used with a stub end or a lap joint ring. The flange can rotate around the stub end, allowing for easy alignment of bolt holes.

Features of ASTM A182 Alloy Steel F9 Flanges:

  • Chromium-Molybdenum Alloy: ASTM A182 F9 contains chromium and molybdenum, providing enhanced corrosion resistance and high-temperature strength.
  • High-Temperature Service: These flanges are specifically designed for service in elevated temperature conditions, making them suitable for applications in industries such as petrochemicals, power generation, and refineries.
  • Forged or Rolled: The flanges are either forged or rolled, ensuring a high level of strength and integrity.
  • Various Class Ratings: ASTM A182 F9 flanges are available in different class ratings, indicating their pressure-temperature ratings and suitability for various applications.

Applications of Alloy Steel F9 Flanges:

  • Power Generation: F9 Alloy Steel Flanges are commonly used in power plants, especially in high-temperature and high-pressure steam environments.
  • Petrochemical Industry: The corrosion resistance and high-temperature strength make these flanges suitable for various applications in the petrochemical industry, including chemical processing units.
  • Refineries: F9 flanges find applications in refineries for connecting pipes and valves in processes involving high temperatures and pressure.
  • Oil and Gas: In the oil and gas industry, particularly in downstream processes, F9 flanges are used for their durability and resistance to harsh conditions.

ASTM A182 Gr F9 Alloy Steel Flanges

It's essential to follow the specific requirements outlined in the ASTM A182 F9 standard for manufacturing, testing, and dimensional specifications when using these flanges in various industrial applications.

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ASTM A182 Gr F9 Alloy Steel Flanges Specifications

Standard ASTM A182 / ASME SA182
Dimensions ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Size 1/2" (15 NB) to 48" (1200NB), DN10~DN5000
Pressure Rating Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
JIS 16 K, 5K, 10 K, 20 K, 30 K, 40 K, 63 K
Flange Connection / Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove, Flange Pipe.
Types of Flanges Threaded / Screwed / Forged / Plate
Coating Yellow Transparent, Zinc Plated, Anti-rust Paint, Oil Black Paint, Cold and Hot Dip Galvanized
Test Of Flange Direct-reading Spectrograph, Ultrasonic flaw detector, Magnetic particle detector, X-ray detector, Hydrostatic testing machine.
Production Technique Used Heat treated, Forged and Machined
Equipment Press machine, Bending machine, Pushing Machine, Sand-blasting machine, electric bevelling machine etc.
Test Certificates EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report, etc

ASTM A182 Gr F9 Alloy Steel Flanges Manufacturing Process

Flange Forging

Compared to cast flanges, forged flanges typically contain less carbon and are less likely to corrode. Forgings have superior mechanical qualities, a thicker structure, and a more streamlined shape.

Heat Treatment

The flange is undergoing heat treatment; the forging process has the slowest total cooling pace, while the standardizing and reducing processes have faster cooling speeds. The flange is undergoing heat treatment; the forging process has the slowest total cooling pace, while the standardizing and reducing processes have faster cooling speeds.

Forging Rolling

Roll forging is a forging technique that shapes a metal object by using opposing rolls. Although roll forging employs rolls to accomplish the desired material deformation, it is categorized as a metal forging procedure rather than a rolling procedure.

Rust Prevention

For steel flanges, conventional rust protection treatments include hot dip galvanizing, electro galvanizing (cold), varnish paint coating, black paint coating, black phosphating treatment, yellow (golden) paint coating, etc.

Flanges Manufacturing Process

ASTM A182 Gr F9 Alloy Steel Flanges Equivalent Material

STANDARD UNS WERKSTOFF NR.
Alloy Steel F9 K90941 1.7386

ASTM A182 Gr F9 Alloy Steel Flanges Chemical Composition

Grade C Mn P S Si Ni Ch Mo Cb
F9 0.15 0.30-0.60 0.030 0.030 0.50-1.00 - 8.0-10.0 0.90-1.10 -

ASTM A182 Gr F9 Alloy Steel Flanges Mechanical Properties

Grade

Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
F9 585 380 20 - 179-217

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Types Of ASTM A182 Gr F9 Alloy Steel Flanges

Slip on Flanges

ASTM A182 Gr F9 Alloy Steel Slip On Flanges

Weld Neck Flanges

ASTM A182 Gr F9 Alloy Steel Weld Neck Flange

Socket weld Flanges

ASTM A182 Gr F9 Alloy Steel Socket weld Flanges

Threaded Flanges

ASTM A182 Gr F9 Alloy Steel Threaded Flanges

Blind Flanges

ASTM A182 Gr F9 Alloy Steel Blind Flange

Lap Joint Flanges

ASTM A182 Gr F9 Alloy Steel Lap Joint Flanges

Forged Flanges

ASTM A182 Gr F9 Alloy Steel Forged Flanges

Spectacle Blind Flange

ASTM A182 Gr F9 Alloy Steel Spectacle Blind Flange

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What Industries Use ASTM A182 Gr F9 Alloy Steel Flanges ?

Export Countries

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