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ASTM A182 F321H / UNS S32109 Stainless Steel Weld Neck Flange WNRTJ Flange

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ASTM A182 F321H / UNS S32109 Stainless Steel Weld Neck Flange WNRTJ Flange

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Brand Name : YUHONG

Model Number : ASTM A182 F321H Stainless Steel Weld Neck Flange

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : CHINA

MOQ : 1PC

Payment Terms : L/C,T/T

Delivery Time : 7 DAYS

Packaging Details : Ply-wooden Case / pallet

Dimensions : ANSI Flange, ASME Flange, BS Flange, DIN Flanges, EN Flange

Standard : B16.5, B16.47 series A, series B

Material : F304, F304L, F304H, F316, F316L, F316Ti, F310, F310S, F321, F321H, F317, F317L, F347,

Size : 1/2" to 48"

Thickness : sch5S to sch.XXS

Class : 150#, 300#, 400#, 600#, 900#, 1500#, 2500#

Surface : FF, RF, RTJ

Type : Weld Neck Flange, Slip-on Flange, Blind Flange, Long Weldneck Flange...

Packaging : Plywood Case /Pallet

High Light : ASTM A182 F321H Stainless Steel WNRTJ Flange, Forged Flange

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ASTM A182 F321H Stainless Steel Flange UNS S32109 Forged WNRTJ Flange

ASTM A182 F321H is a high-temperature, stabilized stainless steel grade used for Weld Neck (WN) Ring Type Joint (RTJ) flanges. Stainless steel grade F321H, part of the 321 series, stabilized with titanium (Ti) to prevent chromium carbide precipitation, enhancing resistance to intergranular corrosion. These flanges are engineered for extreme environments requiring leak-tight seals, high pressure, and thermal stability. Their titanium-stabilized composition and RTJ design make them indispensable in critical HPHT systems, such as oil and gas, petrochemical, and power generation systems. The "H" suffix indicates a higher carbon content (0.04–0.10%) for enhanced creep resistance at elevated temperatures.

Key Features

  1. High-Temperature Performance:

    • Suitable for continuous service up to 800°C (1472°F).

    • Resists oxidation, scaling, and creep deformation under stress.

  2. Stabilized with Titanium:

    • Prevents sensitization (chromium carbide formation) during welding or high-temperature exposure.

  3. WN RTJ Design:

    • Weld Neck (WN): Tapered hub for stress distribution, ideal for high-pressure systems.

    • RTJ Face: Machined groove for metal ring gaskets (e.g., oval/octagonal), ensuring leak-proof seals in HPHT environments.

ASTM A182 F321/ F321H Stainless Steel Flange Equivalent
Trade Name
Grade
UNS #
Flanges
321
F321
S32100
A182 / SA182
321H
F321H
S32109
A182 / SA182

F321 vs. F321H: F321H has higher carbon for improved high-temperature strength.

ASTM A182 F321/F321H Stainless Steel Flange Specification

Specification ASTM A182 / A240 & ASME SA182 / SA240
Grade ASTM A182 F321
Standard ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size 1/2″ to 48″
Dimensions ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Type SO, WN, LWN, BL, SW
Flange Face FF, RF, RTJ
Class / Pressure 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Other materials

Stainless Steel Flange:F304, F304L, F304H, F316, F316L, F316Ti, F310, F310S, F321, F321H, F317, F317L, F347, F347H, F904L etc

Duplex Steel Flange: UNS S31803, 2205, S31254 (254SMO)

Super Duplex Steel Flange: UNS S32750, UNS S32760, UNS S32304, S31500

Carbon Steel Flange: ASTM A105, A105N etc.

Alloy Steel Flange: F1, F11, F22, F5, F9, F91 etc.

Nickel Alloy Flange as below

Monel 400 & K500,

Inconel 600, 601, 617, 625, 690, 718, X-750.

Incolloy 800, 800H, 800HT, 825, 925.

Hastelloy C22, C4, C276, S, C2000, G-30, G-35, X, N, B, B-2, B-3.
Dye Penetrant (PT) Test
ASTM A182 F321H / UNS S32109 Stainless Steel Weld Neck Flange WNRTJ Flange
ASTM A182 F321H / UNS S32109 Stainless Steel Weld Neck Flange WNRTJ Flange

Applications

  • Oil & Gas: Wellhead equipment, pipelines, and refinery systems.

  • Power Plants: Steam lines, boilers, and turbine connections.

  • Chemical Processing: High-temperature reactors and heat exchangers.

  • Aerospace: Exhaust systems and combustion components.


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RTJ Stainless Steel Flange

      
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