Stainless Steel 304 Flanges

 

 

 

Manufacturer Of ASTM A182 F304 SORF Flanges in India, Refer Specification

Since 2000, We produce top Stainless Steel 304 Flanges worldwide. Our inventory features ready-to-ship ASTM A182 F304 SORF Flanges daily. Each SS 304 Flange meets very strict quality standards. Engineers specify our certified SUS 304 BLRF Flanges for critical projects. We deliver precision ASME SA182 SS 304 Flanges to industrial clients. Advanced machinery shapes every SS 304 Raised Face Flange accurately. Clients trust our durable UNS S30400 Plate Flanges for challenging applications. We inspect every 304 Lapped Joint Flange using modern equipment. Our skilled team crafts the DIN 1.4307 Weld Neck Flange safely. Testing confirms each A182 304 Blind Flange resists high pressure.

We stock the reliable 304 Stainless Steel SORF Flange in volume. Each ASME SA182 SS 304 Socket Weld Flange passes hardness checks. Factories install our strong 304 Stainless Steel Threaded Pipe Flange effortlessly. We supply heavy-duty SA 182 Gr F304 Industrial Flanges globally. Our facility produces the 304 Stainless Steel Orifice Flanges with precision. We export premium SS 304 Slip On Flanges worldwide. Our workers inspect 304 Stainless Steel Pipe Flanges thoroughly. You receive top grade SS 304 Forged Flanges quickly.

 

⚙Stainless Steel 304 Flanges Specification

Manufacturing Origin

• India (Manufacturing Base)
• UAE & Saudi Arabia
• Singapore & South Korea
• Europe & Japan

Standards & Equivalents

• ASTM A182 F304
• ASME SA182
• UNS S30400
• Werkstoff Nr. 1.4301

Available Sizes

• 1/2″ – 24″ (DN15 – DN600)
• Custom sizes up to 48″
• Thickness as per B16.5 schedule
• Bore machined to drawing

Pressure Class

• Class 150 to Class 2500
• PN6, PN10, PN16, PN25, PN40
• JIS 5K – 20K on request
• DIN / EN 1092-1 on request

Face & Finish Options

• Raised Face (RF)
• Flat Face (FF)
• Ring Type Joint (RTJ)
• Serrated / Smooth finish

Manufacturing Techniques

• Hot Forged (ASME B16.5/B16.47)
• CNC Turned & Faced
• Solution Annealed
• Pickled & Passivated

Machining & Custom Work

• Bore & Bolt-Hole Drilling to Drawing
• Special Bolt Circles
• Counter-Boring
• Non-Standard Face Detailing

Test Certificates & Quality

• EN 10204 3.1 / 3.2 MTC
• Positive Material Identification (PMI)
• Hydrostatic Test Report
• Third-Party Inspection Report

Documentation & Traceability

• Heat-Wise Material Traceability
• Quality Assurance Plan (QAP)
• Fumigation Certificates
• Batch-Wise Dispatch Records

 

Mumbai-based Supplier of DIN 1.4307 Blind Flanges And 304 Stainless Steel Threaded Pipe Flange in Custom Sizes

📏Dimensions of DIN 1.4307 Blind Flanges

Reliable Stainless Steel 304 Flanges Stockist in India offering precise dimensions with rapid delivery.

NPS (in.)	Dia. of Flange (in.)	Dia. of Bolts (in.)	No. of Bolts	Bolt Circle (in.)	Dia. of Bolt Holes (in.)
1/2	3-1/2	1/2	4	2-3/8	0.62
1	4-1/4	1/2	4	3-1/8	0.62
1/4	3-3/8	1/2	4	2-1/4	0.62
2	6	5/8	4	4-3/4	0.75
2-1/2	7	5/8	4	5-1/2	0.75
3	7-1/2	5/8	4	6	0.75
20	27-1/2	1-1/8	20	25	1.25
4	9	5/8	8	7-1/2	0.75
1-1/2	5	1/2	4	3-7/8	0.62
5	10	3/4	8	8-1/2	0.88
3/4	3-7/8	1/2	4	2-3/4	0.62
6	11	3/4	8	9-1/2	0.88
10	16	7/8	12	14-1/4	1
24	32	1-1/4	20	29-1/2	1.38
12	19	7/8	12	17	1
3-1/2	8-1/2	5/8	8	7	0.75
14	21	1	12	18-3/4	1.12
18	25	1-1/8	16	22-3/4	1.25

 

⇄SS 304 Flanges vs SS 316 Flanges

SS 304 Flanges

• ✓ No molybdenum in composition
• ✓ Good corrosion resistance in mild/general service
• ✓ Lower cost than 316
• ✓ Preferred for food, dairy & general process lines

VS

SS 316 Flanges

• ✓ Contains 2–3% Molybdenum
• ✓ Superior resistance to chlorides & marine atmosphere
• ✓ Better performance in acidic/chemical service
• ✓ Preferred for offshore, pharma & chemical plants

 

🏭Manufacturing Process of SUS 304 BLRF Flanges

1

Billet Cutting

➤

2

Hot Forging

➤

3

Solution Annealing

➤

4

CNC Machining

➤

5

Pickling & Passivation

➤

6

Testing & Dispatch

 

₹Price List of 304 Stainless Steel Threaded Pipe Flange

Types	Size	Class	SCH	USA Price/Piece
Stainless Steel Blind Flange	3/4"	150	40	$ 1.44
	1"			$ 1.71
	1 1/2"			$ 2.80
	2"			$ 4.54
	3"			$ 6.41
	4"			$ 10.20
Stainless Steel Slip On Flange	2"			$ 2.24
	3"			$ 4.16
	8"	300	80	$ 14.37
	10"			$ 20.04
Stainless Steel Weld Neck Flange	2"	150	STD	$ 3.71
	4"	300		$ 7.78
	6"		80	$ 11.82
	8"			$ 17.51

 

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ASTM A182 F304 SORF Flanges Manufacturer in Mumbai - Request a Free Quote

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Get SA 182 Gr F304 Industrial Flanges & 304 Stainless Steel Orifice Flanges in Various Types As Per ASME B16.5

Distinct Types of Stainless Steel 304 Flanges

ASTM A182 304 Flanges

SS 304 Raised Face Flange

ASTM A182 F304 SORF Flanges

A182 F304 Weld Neck Flange

SS 304 WNRF Flange

ASME SA182 SS 304 Socket Weld Flange

DIN 1.4301 SWRF Flange

UNS S30400 Slip On Flange

304 stainless steel SORF Flange

SUS 304 BLRF Flange

WNR 1.4301 Lapped Joint Flange

DIN 1.4307 Blind Flanges

BS 304S31 Orifice Flange

EN X5CrNi18-10 Spectacle Blind Flange

SS 304 Nipoflange Flange

DIN 1.4301 Reducing Flange

UNS S30400 Ring Joint Flange

ASME SA182 SS 304 Long Weld Neck Flange

304 SS Expander Flange

SUS 304 Screwed Flange

WNR 1.4301 Threaded Flange

 

Surface Finish of SA 182 Gr F304 Industrial Flanges

◻

Mill / Black Finish As-forged surface, general duty

◼

Pickled & Passivated Removes scale, restores corrosion resistance

◯

Machined / Polished Face Smooth sealing surface for gasket contact

◉

Serrated Concentric / Spiral Standard raised-face groove finish

 

Pressure Ratings of UNS S30400 Plate Flanges

Geniune Stainless Steel 304 Flanges Supplier in India offering precise pressure ratings.

Temp. °F	Class 150	Class 300	Class 600
200	230	600	1,200
700	110	420	845
500	170	465	930
600	140	440	885
-20~100	275	720	1,440
650	125	430	865
300	205	540	1,075
750	95	415	825
400	190	495	995
800	80	405	810

 

✔ Features of A182 304 Blind Flange

⚡

High Strength Handles high pressure loads

🔧

Versatility Fits multiple industries

🛡

Long Service Life Resists wear & corrosion

₹

Cost Effective Better value over service life

 

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ASTM A182 F304 SORF Flanges Exporter in India - Worldwide Delivery Support

Provide your requirements and get precision-engineered rods with reliable quality, MTC support, and efficient delivery.

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Stockist of ASTM A182 Stainless 304 Socket Weld Flange in Mumbai, View Chemical Composition

⚖Chemical Composition of DIN 1.4307 Weld Neck Flange

Element	C	Mn	Si	P	S	Cr	Ni	N	Fe
SS 304 (max %)	0.08	2.00	1.00	0.045	0.030	18.0–20.0	8.0–11.0	0.10	Balance

 

💪Mechanical Properties of ASME SA182 SS 304 Flanges

515 MPa min Tensile Strength

205 MPa min Yield Strength

217 HB max Hardness

35 % min Elongation

 

⇄304 Stainless Steel Orifice Flanges Equivalent Grades

ASTMA182 F304

DIN1.4301

UNSS30400

JISSUS304

BS304S31

 

⚡ Physical Properties of WNR 1.4301 Lapped Joint Flange

8.0 g/cm³ Density

1400–1450°C Melting Point

193 GPa Modulus of Elasticity

17.2 µm/m·°C Thermal Expansion

 

⚖Torque Chart of EN X5CrNi18-10 Spectacle Blind Flange

Size in Inches	Size in mm	Number of Bolts	Bolt Diameter	Torque lbf.feet	Bolt Stress lbs/inch	Torque Nm
1	35	4	½"	29	33,000	39
1 ½	40			44	50,000	60
2	50		5/8"	86		117
3	80			86		117
4	100	8		69	40,000	93
6	150		¾"	137	45,000	185
8	200		¾"	137	45,000	185
10	250	12	7/8"	194	40,000	263
12	300		7/8"	194	40,000	263
14	350		1"	296	41,000	401
16	400	16	1"	289	40,000	392
18	450	16	1 1/8"	421		571
20	500	20	1 1/8"	421		571
24	600	20	1 ¼"	588		797

 

🛡Coating Types of SS 304 Nipo Flange

◆

Passivation Coat

Restores natural chromium oxide layer

◆

Anti-Rust Oil Coat

Standard export transit protection

◆

VCI Wrapping

Vapor corrosion inhibitor for long transit

◆

Poly-Wrap / Capping

Bore & face protection till installation

 

Find NDT Tested SA 182 Gr F304 Industrial Flanges with RF, FF, RTJ Faces

🔍 Testing Methods of ASME SA182 SS 304 Socket Weld Flange

Reliable Stainless Steel 304 Flanges Stockist in Mumbai offering verified testing methods.

01

Chemical Analysis

Confirms chemical composition

Verified

02

Mechanical Test

Checks strength, hardness, and properties

Verified

03

Ultrasonic Test (UT)

Detects internal defects and flaws

Verified

04

Intergranular Test

Checks corrosion resistance

Verified

05

Dimensional Inspection

Ensures size and dimensional accuracy

Verified

 

◉Flange Face Types of 304 Stainless Steel SORF Flange

Type 01

Raised Face (RF)

Serrated raised ring grips the gasket, standard facing for most seawater flange joints.

Type 02

Flat Face (FF)

Fully flat mating surface, used with full-face gaskets on low-pressure lines.

Type 03

Ring Type Joint (RTJ)

Machined ring groove for a metal-to-metal seal on high-pressure offshore risers.

Type 04

Lap Joint Face

Smooth stub-end facing that rotates freely, simplifying bolt alignment during repair.

Type 05

Tongue & Groove (T&G)

Interlocking tongue and groove faces confine the gasket for a leak-tight, self-aligning joint.

Type 06

Male & Female (M&F)

Recessed female face nests a raised male face, giving precise centering under bolt-up.

 

🏭Applications of SS 304 Raised Face Flange

🥛

Food & Dairy

Processing & handling equipment

🏭

Architecture

Railings, fixtures & facades

🧪

Chemical Processing

Reactors, valves & fasteners

⚙

General Engineering

Shafts, fasteners & machined parts

⛽

Oil & Gas Industry

Valve stems & instrumentation parts

🚗

Automotive Industry

Exhaust trims & fastener components

🧵

Textile Machinery

Spindles, shafts & machine parts

⚓

Marine & Shipbuilding

Propeller shafts & deck fitting components

💉

Medical & Surgical

Instrument pins & surgical components

💧

Water Treatment

Treatment plant shafts & instrumentation fittings

 

🌐Export Solutions Worldwide

★ UAE / Dubai ★ Saudi Arabia ★ Oman ★ Qatar ★ Kuwait ★ Bahrain

 

❓SS 304 Flanges FAQs

What is the difference between SS 304 SORF and WNRF flanges?

SORF slides over the pipe and is fillet welded top and bottom, while WNRF has a tapered hub that is butt welded — WNRF suits higher pressure and cyclic load service.

What is the HSN code and GST rate for SS 304 Flanges in India?

SS 304 forged flanges fall under HSN 7307 21 00 and attract 18% GST.

What is the minimum order quantity for 304 Lapped Joint Flange?

Our MOQ starts from 1 piece, with ex-stock sizes dispatched within 2–4 working days from Mumbai.

Do you export ASTM A182 F304 SORF Flanges to the Middle East?

Yes, we ship weekly consolidated loads to UAE, Saudi Arabia, Oman, Qatar, Kuwait and Bahrain with complete documentation.

 

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ASTM A182 F304 SORF Flanges Supplier in South Korea - Export Quality Supply

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