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Stainless Steel 304 Flanges | ASTM A182 F304 | UNS S30400 | DIN 1.4301

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Stainless steel 304 flanges are made using steel, which has 8% nickel and 18% chromium in its chemical composition. In simple language, this steel is known as austenitic stainless steel. The basic composition of these two most important components provides great protection and strength to the instrument that is being made using them.

The composition of nickel and chromium imparts sturdiness and resistance to corrosion and all kinds of chemical reactions. The material strength of this grade is so strong that it can showcase high tensile and yield strength and provide corrosion resistance to most atmospheric conditions.

There are several properties that Stainless steel 304 flanges are enriched with, such as:

Corrosion Resistance: These flanges reinforce outstanding corrosion resistance, because of which they are suitable for applications in corrosive settings such as chemical processing, marine, and coastal locations.

Aesthetic Appeal: Stainless Steel 304 has a bright and appealing appearance, making it ideal for applications requiring aesthetics, such as architectural projects.

Durability: Stainless steel 304 flanges are also more durable than other stainless steel grades. The flanges are very malleable. They are also durable because 304 stainless steel has good mechanical qualities; flanges constructed from it are durable and can endure mechanical stress and pressure.

Low maintenance and economical pricing: 304 stainless steel requires less upkeep, especially in areas where corrosion resistance is critical. This cuts down on downtime and maintenance expenditures. It is also cheaper and more robust than other steel grades. Ss304 is also non reactive to many chemicals and substances.

Easily available: Since stainless steel is universally famous, it is very easy to obtain it. You can easily find these flanges, and they are in high demand in all kinds of industries.

Specification Stainless Steel 304 Flanges

StandardsANSI/ASME B16.5, B16.48, ANSI Flanges, GOST Flanges, DIN Flanges, EN-1092, B16.47 Series A & B, ASME Flanges, EN Flanges, AWWA Flanges, BS Flanges.
JIS Standard 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
DIN FLANGESDIN 2527, 2627, 2631, 2656, 2576, 2673, 2629, 2628, 2566, 2641, 2637, 2655, 2634, 2636, 2632, 2633, 2638, 2642, 2573, 2635.
Pressure RatingClass 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
TypesThreaded, Plate, Screwed, Forged.
Supporting materialGasket, Ring Joint, Flange Bolts
Size range1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Production techniqueForged, machined and Heat treated
Available Flange TypeWeld Neck Flanges, RTJ Flanges, Slip On Flanges, Spectacle Blind Flanges, Flanges Gaskets, Square Flanges, Standard Insert Flanges, High Hub Blinds Flanges, Flat Flanges, forged flanges, Weldo / Nipo Flanges, Jacket Insert Flanges, Tongue groove Flanges, Blind Flanges, Socket Weld Flanges, Large diameter Flanges, Long Weld Neck Flanges, Spacer Blinds, SWRF Flanges, SORF Flanges, Angle Face Rings Flanges, Spades Ring Spacers Flanges, WNRF Flanges, Screwed Flanges, Insert Flanges, flanges bolts, cf flange, Lap Joint Flanges, ASME B16.36 Orifice Flanges, Plate Flange, Expander Flanges, Ring Type Joint Flanges, Loose Flanges, Reducing Flanges, puddle flange, Threaded Flanges, blank flange, vacuum flange.
Connect Type/ Flange Face TypeRing Type Joint (RTJ), Flat Face (FF), Tongue & Groove, Small Male-Female (SMF), Lap-Joint Face (LJF), Raised Face (RF), Large Male-Female (LMF), Small Tongue.
Custom designAs per your drawing
TestDirect-reading Spectrograph, X-ray detector, UItrasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine.
OriginIndian / USA / Korean / West Europe / Japan
Pressure ClassPN 6 TO PN 100
ThicknessNormal Pipe Size ≤ 18
Bore DiameterNormal Pipe ≤ 10
High TemperatureAbove 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low TemperatureAbove -29 Degree C (−20°F)
Coating/Surface Treatment:Zinc Plated, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized.
European/African/Russian Standard FlangesAvailable
Gaskets TypesFull Face, Metallic Ring, Flat Ring Gasket
Marking Standard
Name of Manufacturer
Schedule
Type of Flange Facing
Pressure Class
Nominal Pipe Size, etc
Test Certificates
EN 10204/3.1B, NACE MR0103, NACE MR0175
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc

Flange Type Available

flanges

Lap Joint

Weld Neck

Weld Neck

Male Female

Male Female

Nippo

Nippo

flanges

Orifice

flanges

Plate

flanges

Puddle

Raised Face

Raised Face

Reducing

Reducing

Ring Spacer

Ring Spacer

Ring Type Joint

Ring Type Joint

Slip on

Slip on

SocketWeld

SocketWeld

Spade

Spade

Spectacle Blind

Spectacle Blind

Square

Square

Threaded Screwed

Threaded Screwed

Tongue Groove

Tongue Groove

EWeld Neck

Weld Neck

Environment

Weldo


Equivalent Grade

STANDARD WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
SS 304 1.4301 S30400 SUS 304 304S31 08Х18Н10 Z7CN18‐09 X5CrNi18-10

Chemical Properties

Grade C Mn Si P S Cr Ni
SS 304 0.08 max 2 max 0.75 max 0.045 max 0.030 max 18 – 20 8 – 11

Mechanical Properties

Grade Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
304 / 304L 8.0 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

ANSI B16.5 SS 304 Flanges Dimensions Class-150

Nominal Pipe Size
NPS
(inches)		Class 150
Diameter of
Flange
(inches)		No.
of
Bolts		Diameter of
Bolts
(inches)		Diameter of
Bolt Holes
(inches)		Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-1/241/20.622-3/8
3/43-7/841/20.622-3/4
14-1/441/20.623-1/8
1-1/44-5/841/20.623-1/2
1-1/2541/20.623-7/8
2645/80.754-3/4
2-1/2745/80.755-1/2
37-1/245/80.756
3-1/28-1/285/80.757
4985/80.757-1/2
51083/40.888-1/2
61183/40.889-1/2
813-1/283/40.8811-3/4
1016127/8114-1/4
1219127/8117
14211211.1218-3/4
1623-1/21611.1221-1/4
1825161-1/81.2522-3/4
2027-1/2201-1/81.2525
2432201-1/41.3829-1/2

SASME B16.5 SS Flanges Dimensions Class-600

Nominal Pipe Size
NPS
(inches)		Class 600
Diameter of
Flange
(inches)		No.
of
Bolts		Diameter of
Bolts
(inches)		Diameter of
Bolt Holes
(inches)		Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2987/817-1/4
410-3/487/818-1/2
513811.1210-1/2
6141211.1211-1/2
816-1/2121-1/81.2513-3/4
1020161-1/41.3817
1222201-1/41.3819-1/4
1423-3/4201-3/81.520-3/4
1627201-1/21.6223-3/4
1829-1/4201-5/81.7525-3/4
2032241-5/81.7528-1/2
2437241-7/8233

Pressure Class/ Rating

ASME/ANSI B 16.5
Lap Joint Flange, Ring Type Joint Flange, Threaded Flange, Blind Flange, High Hub Blind Flange, Socket Weld Flange, Slip on Flange, Welding Neck Flange.
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B 16.47Blind Flange [Series A & B], Welding Neck Flange.
PRESSURE CLASS75, 150, 300, 400, 600, 900
ASME/ANSI B 16.36Slip on Flange, Threaded Flange, Welding Neck Flange.
PRESSURE CLASS300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1
Plate Flange, Welding Neck Flange, Hubbed Slip on Flange, Lapped Pipe End Flange, Loose Plate With Weld Neck Flange, Hubbed Threaded Flange, Blank Flange, Loose Plate Flange.
PRESSURE CLASSPN 2.5 TO PN 40
BS 4504[PART 1]Blank Flange, Loose Plate With Weld On Plate Collar, Welding Neck Flange, Plate Flange, Hubbed Slip-On Hubbed Threaded.
PRESSURE CLASSPN 2.5 TO PN 400
BS 1560 BOSSBlind Flange, Screwed Boss Flange, Welding Neck Flange,Slip-On Flange, Lapped Flange, Socket Welding Flange.
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
BS10Screwed Boss Flange, Plate Slip-On Flange, Slip-On Boss Flange, Blind Flange, Welding Neck Flange.
TABLED, E, F, H
DIN FLANGESDIN 2527, 2632, 2635, 2673, 2566, 2655, 2631, 2627, 2634, 2576, 2636, 2629, 2633, 2573, 2656, 2638, 2637, 2642, 2641, 2628
PRESSURE CLASSPN 6 TO PN 100

Tolerance Chart Of Stainless Steel 304 Slip On Flange

ASME B16.5Tolerance
AOutside Diameter (O.D.)
  • When Outside Diameter (O.D.) is 24" or less: ±1/16" (1.6 mm)
  • When Outside Diameter (O.D.) is over 24": ±1/8" (3.2 mm)
DInside Diameter
  • 10" and smaller: ±1/32" (0.8 millimeter)
  • 12" thru 18": +1/8" (3.2 millimeter)
  • 20" and larger: -1/16" (1.6 millimeter)
BDiameter of contact face
  • 1/16" raised face: ±1/32" (0.8 millimeter)
  • 1/4" Raised Face (RF), Tongue & Groove (T/G), (male & female), (m/f): ±1/64" (0.4 mm)
JDiameter of hub at base
  • When hub base is 24" or smaller: ±1/16" (1.6 millimeter)
  • When hub base is over 24": ±1/8" (3.2 millimeter)
HDiameter of hub at point of welding
  • 5" and smaller: +3/32" (2.4 millimeter), -1/32" (0.8 millimeter)
  • 6" and larger: +5/32" (4.0 millimeter), -1/32 (0.8 millimeter)
PDrilling
  • Bolt circle: ±1/16" (1.6 millimeter)
  • Bolt hole spacing: ±1/32" (0.8 millimeter)
Eccentricity of bolt circle with respect to facing
  • 2 1/2" and smaller ±1/32" (0.8 millimeter) max.
  • 3" and larger ±1/16" (1.6 millimeter) max.
CThickness
  • 18" and smaller: ±1/8" (3.2 millimeter), -0"
  • 20" and larger: ±3/16" (4.8 millimeter), -0"
KLength of hub
  • 10" and smaller: ±1/16" (1.6 millimeter)
  • 12" and larger: ±1/8" (3.2 millimeter)

ANSI B16.5 SS F304 Flange Torque Chart

Size in InchSize in MMNumber of BoltBolt DiameterThread TypeBolt Stress
lb/in2		Torque
lbf.ft.		Torque
Nm
1/2154½”UNC25,0002230
3/4204½”UNC30,0002636
1354½”UNC33,0002939
1 ½404½”UNC50,0004460
25045/8”UNC50,00086117
38045/8”UNC50,00086117
410085/8”UNC40,0006993
61508¾”UNC45,000137185
82008¾”UNC45,000137185
10250127/8”UNC40,000194263
12300127/8”UNC40,000194263
14350121”UN841,000296401
16400161”UN840,000289392
18450161 1/8”UN840,000421571
20500201 1/8”UN840,000421571
24600201 ¼”UN840,000588797

Application

  • Food & Beverage
  • Paper Industry
  • Pharmaceutical
  • Hospital Equipment
  • Textiles
  • Dairy
  • Aircraft
  • Chemicals
  • Others Parts in Machinery
Employee

Testing

  • Hydrostatic Test
  • Macro Test
  • Ultra Sonic Test (UT)
  • Micro Test
  • Hardness Test
  • Radiography Test
  • Pitting Resistance Test
  • PMI Testing
  • Mechanical Testing
  • X-ray detector
MARKET

Packing

  • Wooden Boxes
  • Shrink-Wrappedt
  • Carton Boxes
  • Wooden Crates
  • Wooden Pallets
Employee

Materials

Materials

Quick Fact

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