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ASTM A182 F 304H Stainless Steel Flanges

ASTM A182 F 304H Stainless Steel Flanges
Sizes: 1/2" to 48" (DN15 to DN1200)
Pressure Class: Class 150 to 2500, PN6 to PN64
Type: Forged, Plate, Blind, Weld Neck
Standard: ASME B16.5, B16.47, EN 1092-1
Face Type: RF, FF, RTJ, Tongue & Groove
Surface Finish: Rust-Proof Oil, Spiral Serrated Finish
Process: Forged, Heat Treated, CNC Machined
Origin: India, Japan, USA, Europe
goldenislands.com.sa

ASTM A182 F304H Stainless Steel Flanges are specialized high-temperature components designed to offer superior creep strength and elevated mechanical properties. Manufactured in compliance with ASTM A182 and ASME SA182 standards, these forged flanges contain a controlled carbon content restricted to 0.04% to 0.10%. This higher carbon concentration improves structural stability and provides outstanding long-term creep resistance at temperatures extending beyond 500 °C, preventing early deformation or stress rupture in critical piping networks.

Our manufacturing line specializes in high-integrity ASTM A182 F304H weld neck, slip-on, blind, threaded, and socket weld flanges. Available in pressure classes ranging from Class 150 to Class 2500, these high-carbon austenitic flanges are fully solution annealed to maximize their high-temperature capabilities. They are predominantly utilized in boiler applications, petroleum refineries, thermal power generation plants, and chemical reactors where pipelines are consistently exposed to high-temperature thermal cycles and demanding pressures.



ASTM A182 F 304H Stainless Steel Flanges Features

  • » Certification: MTC EN 10204 type 3.1 & NABL Approved Lab Reports
  • » Global Standards: ASTM A182, ASME B16.5, B16.47, EN 1092-1, and DIN
  • » Elevated Carbon Advantage: Controlled carbon (0.04% - 0.10%) provides excellent creep and tensile strength at high temperatures
  • » Value Added Services: Custom drilling, precision CNC machining, mirror polishing, and edge beveling
  • » Rigorous Quality Testing: 100% NDT (Radiography, Ultrasonic, Hydrostatic) and PMI verification
  • » Solution Annealed: Specialized thermal treatment ensures optimal grain structure for severe heat services
  • » Seating Profile: Available in Flat Face (FF), Raised Face (RF), and Ring Type Joint (RTJ)
  • » Wide Configurations: Ready production of Weld Neck, Slip-On, Blind, and Socket Weld 304H Flanges

ASTM A182 F 304H Stainless Steel Flanges Specification

Sizes & Pressure Class

  • Dimension Range: 1/2" to 48" (DN15 to DN1200)
  • ASME B16.5: Class 150 to Class 2500
  • ASME B16.47: Series A & B (26" to 60")
  • DIN / EN 1092-1: PN6, PN10, PN16, PN25, PN40, PN64

WN & RTJ Specifications

  • Weld Neck (WNRF): Tapered hub prevents stress concentration
  • Ring Type Joint (RTJ): Ideal for high-temperature sealing
  • Bores: Custom machined to match elevated schedule pipe
  • Seating Face: Raised Face (RF) or RTJ Groove

Slip-On & RF Details

  • Slip-On (SORF): Slide over pipe for convenient alignment
  • Raised Face (RF): Increases gasket pressure for reliable seal
  • Thermal Advantage: 304H grade maintains high yield at heat
  • Applications: Steam lines, exhausts, and heat exchangers

Blind & Line Isolation

  • Blind Flanges (BLRF): For terminating pipe ends safely
  • Spectacle Blinds: ASME B16.48 line blanks for fast shutoff
  • Creep Resistance: Prevents sagging under prolonged heat
  • Testing: Advanced UT checks for internal void detection

SW & Threaded Details

  • Socket Weld (SWRF): Robust weld for high-pressure bores
  • Threaded Flanges: High-temperature connections without welding
  • Sizes: 1/2" to 4" (DN15 to DN100)
  • Standards: ASME B16.5, NPT / BSPT profiles

LJ & Orifice Specifications

  • Lap Joint Flanges (LJ): Economical turning flange with stub end
  • Orifice Flanges: Equipped with monitoring ports
  • Service: Measuring flow in high-temperature utility pipes
  • Standard: ASME B16.36 dimensional standard

Advanced Engineering

  • Long Weld Neck (LWN): For high-temperature vessel nozzles
  • Reducer Flanges: Safely reduces pipe size without extra tee
  • Ring Flange: Flat or grooved ring plate types
  • Square Flanges: For extreme thermal hydraulic piping

Alloy & Manufacturing

  • Grade: ASTM A182 F304H / UNS S30409 / 1.4948
  • Carbon Content: Controlled 0.04% – 0.10%
  • Process: Hot forged for high thermal grain integrity
  • Thermal Treatment: Solution Annealed at 1040 °C min

Testing & Compliance

  • MTC Document: EN 10204 3.1 with chemical & mechanical tests
  • Testing: Elevated-temp tensile & creep testing available
  • Inspection: Ultrasonic, Radiography, and PMI tested
  • Certification: Fully IBR approved for boiler services

ASTM A182 F 304H Stainless Steel Flanges Detailed Specifications

Specification Details
Specification ASTM A182 / A403 & ASME SA182 / SA403
Grade ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Connect Type/ Flange Face Type Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Large Tongue & Groove, Small Tongue, Groove
Surface treatment Anti-rust oil, transparent/ yellow/ black anti trst paint, Zinc, hot dipped galvanized
Size Range 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Pressure DIN:PN6 PN10 PN16 PN25 PN40; ANSI: class: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-PN6, PN10, PN16, PN25, PN40, PN64 etc.
JIS: 5K, 10 K, 16 K 20 K,30 K,40 K, 63 K
Standard ANSI DIN,GOST,JIS,UNI,BS,AS2129,AWWA,EN,SABS,NFE etc.
ASME, API, ASTM, BS, DIN, EN, MSS, JIS, AWWA, GOST
ANSI Flange, ASME Flange, BS Flange, DIN Flange, EN Flange
  • B.S : BS4504 , BS3293, BS1560, BS10
  • DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638
  • ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
  • ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
  • ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
  • AS 2129: table D; table E; table H
  • The other standard:AWWA C207;EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203;UNI2276
  • American standard (ANSI)
  • German (DIN)
  • British standard (BS)
  • Any other specilised flanges.
Production technique: Forged, Heat treated and machined
Special Design As per your drawing
AS, ANSI, BS, DIN and JIS
15 NB (1/2″) to 200 NB (8″)
Equal and Reducing Configurations

Stainless Steel Threaded Flange, Slip-On Flange, Socketweld Flange, Weld Neck Flange, Blind Flange
Test Direct-reading Spectrograph,Hydrostatic testing machine,X-ray detector,UI trasonic flaw detector,Magnetic particle detector
Equipment Press machine ,Bending machine,Pushing Machine,electric bevelling machine Sand-blasting machine,etc
Origin West Europe / Japan / Indian / USA / Korean
Test Certificates Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report
Specialized manufacturer of Stainless Steel Blind Flanges, Stainless Steel Table Flanges, Stainless Steel Weld Neck Flanges, Stainless Steel Threaded Flanges, Stainless Steel Slip-On Flanges, Stainless Steel Socketweld Flanges, Stainless Steel Plate Flanges, Stainless Steel Lap Joint Flanges, Stainless Steel Loose Flanges, and Stainless Steel Orifice Flanges. Stainless Steel AS 4087 Water Flanges are available in class 150, 300, 600, 900, 1500 and 2500.
Key markets and industries
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.
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Stainless Steel 304H Flanges Type, Size Range & Dimensional Standards

Flange Type Dimension Range Standard / Drawing Valid Norm
Stainless Steel 304H Blind Flanges DN15 – DN2500 DIN2527 PN16 DN150 BL 300lb 6"
½" – 24" Standard ANSI / ASME Class 150 to 2500
Stainless Steel 304H Threaded with neck DN15 – DN150 DIN2566 DN32 / 42.4 TH 300lb 1"
Stainless Steel 304H Threaded Flanges ½" – 24" Standard Threaded NPT / BSPT Sizes
Flanges smooth for welding (Plate) DN15 – DN2500 DIN2576 DN150
Stainless Steel 304H Welding Neck Flanges DN15 – DN2500 DIN2635 DN150 / 168.3 WN 300lb 6", GOST Dy150 Py16
½" – 24" / Dy10 – Dy2400 ASME B16.5 WN Classes 150 – 2500
Stainless Steel 304H loose flanges, smooth Bunde DN15 – DN2500 DIN2642 DN150
Stainless Steel 304H loose flanges Stub DN15 – DN2500 DIN2673 DN150
Stainless Steel 304H Welding flanges with neck DN15 – DN2500 DIN86030 DN150
Stainless Steel 304H Slip On Flanges ½" – 24" SO 300lb 6"
Dy10 – Dy2400 GOST Standard Specifications
Stainless Steel 304H Lap Joint Flanges ½" – 24" LJ 300lb 6"
Stainless Steel 304H Socket Welding Flanges ½" – 3" SW 300lb 6"
Forged and Plate Flanges
(Slip-On, Weld Neck, Blind, Lap Joint, Threaded, Socket Weld, Reducing, Plate)
½" – 36" Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Large Tongue & Groove, Small Tongue & Groove

Types of ASTM A182 F 304H Stainless Steel Flanges

Stainless Steel 304H Weld Neck Flange

Stainless Steel 304H Weld Neck Flange

Stainless Steel 304H Lap Joint Flange

Stainless Steel 304H Lap Joint Flange

Stainless Steel 304H Orifice Flange

Stainless Steel 304H Orifice Flange

Stainless Steel 304H Spectacle Blind Flange

Stainless Steel 304H Spectacle Blind Flange

Stainless Steel 304H Ring Flange

Stainless Steel 304H Ring Flange

Stainless Steel 304H Socket Weld Flange

Stainless Steel 304H Socket Weld Flange

Types of Stainless Steel 304H Flanges

  • Stainless Steel 304H Table Flanges/ SS 304 Flanges
  • Stainless Steel 304H Raised Face Weld Neck Flanges
  • Stainless Steel 304H Threaded Flanges/ SS 304
  • Stainless Steel 304H Raised Face Slip-On Flanges
  • Stainless Steel 304H Socketweld Flanges
  • Stainless Steel 304H Raised Face Blind Flanges
  • Stainless Steel 304H Blind Plate Flanges
  • Stainless Steel 304H Lap Joint Flanges
  • Stainless Steel 304H Flanged Buttweld
  • Stainless Steel 304H Spectacle Blind
  • Stainless Steel 304H Loose Flanges Manufacturer
  • Stainless Steel 304H Orifice Flanges
  • Stainless Steel 304H DIN Flanges/ SS 304 Flange
  • Stainless Steel 304H AS 4087 Water Flanges
  • Stainless Steel 304H ANSI Class 150 Flanges
  • Stainless Steel 304H ANSI Class 300 Flanges
  • Stainless Steel 304H ANSI Class 600 Flanges
  • Stainless Steel 304H ANSI Class 900 Flanges
  • Stainless Steel 304H ANSI Class 1500 Flanges
  • Stainless Steel 304H ANSI Class 2500 Flanges
  • Stainless Steel 304H plate flanges suppliers
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  • Stainless Steel 304H Square Flanges
  • Stainless Steel 304H Blank Flanges suppliers
  • Stainless Steel 304H Screwed Flanges
  • Stainless Steel 304H Ring Type Joint Flanges
  • Stainless Steel 304H Ring Flange/ SS 304 Flanges

ASTM A182 F 304H Stainless Steel Flange Chemical Composition

Element Value (%)
Carbon (C) 0.04 – 0.10
Manganese (Mn) 2.00 max
Silicon (Si) 1.00 max
Chromium (Cr) 18.00 – 20.00
Nickel (Ni) 8.00 – 11.00
Phosphorus (P) 0.045 max
Sulfur (S) 0.030 max
Iron (Fe) Balance

ASTM A182 F 304H Stainless Steel Flange Mechanical Properties

Property Value
Tensile Strength (MPa) 515 min
Yield Strength (0.2% Offset, MPa) 205 min
Elongation in 2 in. or 50mm (%) 30 min
Reduction of Area (%) 50 min
Hardness (Brinell HBW) 201 max
Hardness (Rockwell B) 92 max

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Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
Jeddah Industrial Cities (1st, 2nd & 3rd)
Dammam Industrial Areas (1st, 2nd & 3rd)
Jubail Industrial City
Yanbu Industrial City
Rabigh Industrial City
Al Khobar Industrial Area
Al Ahsa Industrial City
Madinah Industrial City
Makkah Industrial City
Taif Industrial City
Tabuk Industrial City
Jazan Industrial City
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Flange and valve supplier Saudi Arabia
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