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ASTM A182 Stainless Steel 304L Flanges

ASTM A182 Stainless Steel 304L 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, Smooth & Serrated Finish
Process: Forged, CNC Machined, Heat Treated
Origin: India, Japan, USA, Europe
goldenislands.com.sa

ASTM A182 Stainless Steel 304L Flanges are specialized piping components designed specifically to prevent sensitization during the welding process. Manufactured to the strict requirements of ASTM A182 and ASME SA182, these flanges are forged from an extra-low carbon variation of the standard 304 austenitic alloy. By restricting the carbon content, these F304L flanges minimize the precipitation of harmful chromium carbides at the grain boundaries, making them ideally suited for applications that involve severe welding or thermal processing without requiring subsequent post-weld annealing.

Our heavy-duty production line supplies a diverse range of configurations, including ASTM A182 F304L slip-on, weld neck, blind, threaded, and socket weld flanges. Available in multiple pressure classes from Class 150 up to Class 2500 and PN6 to PN64, each component is precision CNC machined to match specific pipeline schedules. Their exceptional resistance to localized intergranular corrosion makes these low-carbon flanges the standard choice for chemical processing networks, brewing industries, industrial manufacturing installations, and high-purity water supply systems.



ASTM A182 Stainless Steel 304L 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 norms
  • » Low Carbon Advantage: Restricts intergranular corrosion and grain-boundary sensitization during welding
  • » Value Added Services: Spiral Serrated Machining, Mirror Polishing, Pickling, and Custom Drilling
  • » Stringent Testing: 100% NDT (Radiography, Ultrasonic, Hydrostatic) and PMI Tested
  • » No Post-Weld Anneal: Ideal for field welding without requiring subsequent heat treatment
  • » Seating Faces: Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ) matching any gasket profile
  • » Full Portfolio: Ready stock of Slip-On, Weld Neck, Blind, and Socket Weld F304L Flanges

ASTM A182 Stainless Steel 304L Flanges Specification

Size Range & Ratings

  • Dimensional Range: 1/2" to 48" (DN15 to DN1200)
  • ASME B16.5: Class 150 to Class 2500
  • ASME B16.47: Series A and B (26" to 60")
  • Pressure PN: PN6, PN10, PN16, PN25, PN40, PN64

Slip-On & Plate Specs

  • SORF Flanges: Low carbon prevents carbide precipitation
  • Plate Flanges: Economical flat-face designs for low pressure
  • Weldability: Excellent weld fusion without post-weld cracking
  • Faces: Raised Face (RF) and Flat Face (FF)

WN & RTJ Specifications

  • Weld Neck (WNRF): Tapered hub for structural stress relief
  • Ring Joint (RTJ): Machined grooves for metallic gasket sealing
  • Application: High pressure and severe thermal fluctuations
  • Precision: Custom ID bores to perfectly match schedule pipe

Blind & Line Isolation

  • Blind Flanges (BLRF): For permanent or temporary pipe closure
  • Spectacle Blinds: Combines solid blind and ring spacer
  • Corrosion: 304L low carbon resists pitting at stagnant ends
  • Standards: ASME B16.48, ASME B16.5

SW & Threaded Details

  • Socket Weld (SWRF): Counterbore socket for smooth internal flow
  • Threaded Flanges: For systems where welding is prohibited
  • Sizes: 1/2" to 4" (DN15 to DN100)
  • Standards: ASME B16.5, NPT / BSPT threads

LJ & Orifice Specifications

  • Lap Joint Flanges (LJ): Mated with 304L stub ends for rotation
  • Orifice Flanges: Precision drilled tapping holes for meters
  • Application: Pipeline cleaning and flow measurement
  • Standard: ASME B16.36 dimensional standard

Customized Flanges

  • Long Weld Neck (LWN): For nozzle extensions on vessels
  • Nipo Flanges: Compact 90° branch connections
  • Reducer Flanges: Economical change in pipeline size
  • Square Flanges: Designed for high-pressure hydraulic lines

Flange Seating & Faces

  • RF (Raised Face): Heightens bolt pressure on gasket
  • FF (Flat Face): Coplanar face to prevent structural stress
  • Finishes: Stock finish (250 AARH), smooth, spiral serrated
  • Custom Faces: Tongue & Groove, Male & Female

Testing & Compliance

  • Grade: ASTM A182 F304L / UNS S30403 / 1.4307
  • Traceability: 100% PMI tested to ensure carbon < 0.030%
  • Testing: Intergranular Corrosion (IGC) test Practice A/E
  • MTC: Complete heat trace traceability via EN 10204 3.1

ASTM A182 Stainless Steel 304L 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 304L Flanges Type, Size Range & Dimensional Standards

Flange Type Dimension Range Standard / Drawing Valid Norm
Stainless Steel 304L Blind Flanges DN15 – DN2500 DIN2527 PN16 DN150 BL 300lb 6"
½" – 24" Standard ANSI / ASME Class 150 to 2500
Stainless Steel 304L Threaded with neck DN15 – DN150 DIN2566 DN32 / 42.4 TH 300lb 1"
Stainless Steel 304L Threaded Flanges ½" – 24" Standard Threaded NPT / BSPT Sizes
Flanges smooth for welding (Plate) DN15 – DN2500 DIN2576 DN150
Stainless Steel 304L 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 304L loose flanges, smooth Bunde DN15 – DN2500 DIN2642 DN150
Stainless Steel 304L loose flanges Stub DN15 – DN2500 DIN2673 DN150
Stainless Steel 304L Welding flanges with neck DN15 – DN2500 DIN86030 DN150
Stainless Steel 304L Slip On Flanges ½" – 24" SO 300lb 6"
Dy10 – Dy2400 GOST Standard Specifications
Stainless Steel 304L Lap Joint Flanges ½" – 24" LJ 300lb 6"
Stainless Steel 304L 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 Stainless Steel 304L Flanges

Stainless Steel 304L Ring Type Joint Flange

Stainless Steel 304L Ring Type Joint Flange

Stainless Steel 304L Lap Joint Flange

Stainless Steel 304L Lap Joint Flange

Stainless Steel 304L Orifice Flange

Stainless Steel 304L Orifice Flange

Stainless Steel 304L Spectacle Blind Flange

Stainless Steel 304L Spectacle Blind Flange

Stainless Steel 304L Ring Flange

Stainless Steel 304L Ring Flange

Stainless Steel 304L Socket Weld Flange

Stainless Steel 304L Socket Weld Flange

Types of Stainless Steel 304L Flanges

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

ASTM A182 Stainless Steel 304L Flange Chemical Composition

Element Value (%)
Carbon (C) 0.030 max
Manganese (Mn) 2.00 max
Silicon (Si) 1.00 max
Chromium (Cr) 18.00 – 20.00
Nickel (Ni) 8.00 – 12.00
Phosphorus (P) 0.045 max
Sulfur (S) 0.030 max
Iron (Fe) Balance

ASTM A182 Stainless Steel 304L Flange Mechanical Properties

Property Value
Tensile Strength (MPa) 485 min
Yield Strength (0.2% Offset, MPa) 170 min
Elongation in 2 in. or 50mm (%) 30 min
Reduction of Area (%) 50 min
Hardness (Brinell HBW) 201 max
Hardness (Rockwell B) 92 max

Stainless Steel 304L Flanges Ready Stock At Golden Steel Material

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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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