Stainless Steel Flanges

Neeka Tubes is a prominent manufacturer of Stainless Steel Flanges, catering to industries worldwide. SS flanges connect pipes, valves, pumps and other allied equipment creating safe and leakage free joints. SS flanges are corrosion resistant, hard and strong with high strength and therefore utilized in different applications in industries.

We offer many types of stainless steel flanges such as Weld Neck, Slip-On, Socket Weld, Threaded, Blind, RTJ, Lap Joint, Back-Up, Reducing, and Orifice Flanges. Our flanges come in sizes ranging from ½” to over 36”. They can support different bores, from S/5s to XXH, and pressure ratings of 150, 300, and 600. Each SS flange is designed for optimal strength, reliability and performance.

Table of Content

Most Common Types of Stainless Steel Flanges
Stainless Steel Flanges Specifications
Stainless Steel Flanges Properties
Stainless Steel Flanges Dimensions Chart
Stainless Steel Flanges Weight Chart
Stainless Steel Flanges Packing & Marking
Industrial Application of Stainless Steel Flanges

Check Availability of Stainless Steel Flanges, High-Pressure Stainless Steel Flanges, Best Quality SS Flanges Manufacturer in India, We stock a range of SS Flanges.

Key Features of Stainless Steel Flanges

Corrosion Resistance – Made from premium SS flanges, they resist rust and oxidation.
High Strength & Durability – Engineered to withstand high pressure and extreme conditions.
Leak-Proof Connections – Provides a tight, secure seal for industrial piping systems.
Easy Installation & Maintenance – Designed for simple fitting and long-term use.

Stainless steel flanges are commonly used in oil and gas, chemical processing, power plants, water treatment, food processing and pharmaceuticals. Their strong nature makes them important for piping systems, pressure vessels, and heat exchangers. These flanges help move fluids and gases effectively in industrial areas.

Most Common Types of Stainless Steel Flanges

Stainless Steel Flanges Specifications

Size Chart	1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Standards	API7S-15, API7S-43, API605, ANSI/ASME B16.5, B16.47 Series A & B, B16.48, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, EN1092
Pressure Rating ANSI	600 LBS, 900 LBS, 150 LBS, 2500 LBS, 300 LBS, 1500 LBS
Pressure Calculation in DIN	16Bar 6Bar 25Bar 40Bar 10Bar / PN10 PN16 PN6 PN25 PN64 PN40
JIS	5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
UNI	6Bar 10Bar 16Bar 25Bar 40Bar
EN	6Bar 10Bar 16Bar 25Bar 40Bar
Coating	Anti-rust Paint, Zinc Plated,Oil Black Paint, Cold and Hot Dip Galvanized, Yellow Transparent
Most common types	Forged / Threaded / Screwed / Plate
Test Certificates	EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc
Production technique	Forged, Heat treated and machined
Connect Type/ Flange Face Type	Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Raised Face (RF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Special design	As per your drawing AS, ANSI, BS, DIN and JIS 15 NB (1/2″) to 200 NB (8″) Equal and Reducing Configurations
Testing performed by stainless steel flanges manufacturers in India	Hydrostatic testing machine, X-ray detector, Direct-reading Spectrograph, UI trasonic flaw detector, Magnetic particle detector
Equipment	Bending machine, Pushing Machine,Press machine, electric bevelling machine, Sand-blasting machine etc
Origin	Indian / West Europe / Japan / USA / Korean
Common SS Flange standards	As a stainless steel flanges manufacturers in India we strictly follow the below standards German (DIN) B.S: BS4504 , BS3293, BS1560, BS10 AS 2129: Table D; Table E; Table H ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48 American standard (ANSI) British standard (BS) ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
SS Pipe Flanges applications	High demands in Petrochemical Plants Nuclear power Bitumen upgraders Heavy oil refineries. Oil and Gas sectors

Buy Online Flange SS 304, Widest Size Range in SS Flange price, Check SS Flange Manufacturer in Mumbai.

Stainless Steel Flanges Chemical Composition

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N	Ti	Fe
304	min.						18.0		8.0
304	max.	0.08	2.0	0.75	0.045	0.030	20.0		10.5	0.10
304L	min.						18.0		8.0
304L	max.	0.030	2.0	0.75	0.045	0.030	20.0		12.0	0.10
304H	min.	0.04					18.0		8.0
304H	max.	0.010	2.0	0.75	0.045	0.030	20.0		10.5
SS 310		0.015 max	2 max	0.015 max	0.020 max	0.015 max	24.00 26.00	0.10 max	19.00 21.00	54.7 min
SS 310S		0.08 max	2 max	1.00 max	0.045 max	0.030 max	24.00 26.00	0.75 max	19.00 21.00	53.095 min
SS 310H		0.04 0.10	2 max	1.00 max	0.045 max	0.030 max	24.00 26.00		19.00 21.00	53.885 min
316	min.						16.0	2.03.0	10.0
316	max.	0.035	2.0	0.75	0.045	0.030	18.0	2.03.0	14.0
316L	min.						16.0	2.03.0	10.0
316L	max.	0.035	2.0	0.75	0.045	0.030	18.0	2.03.0	14.0
316TI		0.08 max	10.00 14.00	2.0 max	0.045 max	0.030 max	16.00 18.00	0.75 max	2.00 3.00
317		0.08 max	2 max	1 max	0.045 max	0.030 max	18.00 20.00	3.00 4.00				57.845 min
SS 317L		0.035 max	2.0 max	1.0 max	0.045 max	0.030 max	18.00 20.00	3.00 4.00	11.00 15.00			57.89 min
SS 321		0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	17.00 19.00		9.00 12.00	0.10 max	5(C+N) 0.70 max
SS 321H		0.04 0.10	2.0 max	1.0 max	0.045 max	0.030 max	17.00 19.00		9.00 12.00	0.10 max	4(C+N) 0.70 max
347/ 347H		0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	17.00 20.00		9.0013.00
410	min.						11.5
410	max.	0.15	1.0	1.00	0.040	0.030	13.5		0.75
446	min.						23.0			0.10
446	max.	0.2	1.5	0.75	0.040	0.030	30.0		0.50	0.25
904L	min.						19.0	4.00	23.00	0.10
904L	max.	0.20	2.00	1.00	0.045	0.035	23.0	5.00	28.00	0.25

Mechanical Properties of Stainless Steel Flanges

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 %
304H	8.0 g/cm3	1400 °C (2550 °F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	40 %
310 / 310S / 310H	7.9 g/cm3	1402 °C (2555 °F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	40 %
306/ 316H	8.0 g/cm3	1400 °C (2550 °F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	35 %
316L	8.0 g/cm3	1399 °C (2550 °F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	35 %
317	7.9 g/cm3	1400 °C (2550 °F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	35 %
321	8.0 g/cm3	1457 °C (2650 °F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	35 %
347	8.0 g/cm3	1454 °C (2650 °F)	Psi 75000 , MPa 515	Psi 30000 , MPa 205	35 %
904L	7.95 g/cm3	1350 °C (2460 °F)	Psi 71000 , MPa 490	Psi 32000 , MPa 220	35 %

Equivalent Grades For Stainless Steel Flanges

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
SS 304	1.4301	S30400	SUS 304	304S31	08Х18Н10	Z7CN18‐09	X5CrNi18-10
SS 304L	1.4306 / 1.4307	S30403	SUS 304L	3304S11	03Х18Н11	Z3CN18‐10	X2CrNi18-9 / X2CrNi19-11
SS 304H	1.4301	S30409	–	–	–	–	–
SS 310	1.4841	S31000	SUS 310	310S24	20Ch25N20S2	–	X15CrNi25-20
SS 310S	1.4845	S31008	SUS 310S	310S16	20Ch23N18	–	X8CrNi25-21
SS 310H	–	S31009	–	–	–	–	–
SS 316	1.4401 / 1.4436	S31600	SUS 316	316S31 / 316S33	–	Z7CND17‐11‐02	X5CrNiMo17-12-2 / X3CrNiMo17-13-3
SS 316L	1.4404 / 1.4435	S31603	SUS 316L	316S11 / 316S13	03Ch17N14M3 / 03Ch17N14M2	Z3CND17‐11‐02 / Z3CND18‐14‐03	X2CrNiMo17-12-2 / X2CrNiMo18-14-3
SS 316H	1.4401	S31609	–	–	–	–	–
SS 316Ti	1.4571	S31635	SUS 316Ti	320S31	08Ch17N13M2T	Z6CNDT17‐123	X6CrNiMoTi17-12-2
SS 317	1.4449	S31700	SUS 317	–	–	–	–
SS 317L	1.4438	S31703	SUS 317L	–	–	–	X2CrNiMo18-15-4
SS 321	1.4541	S32100	SUS 321	–	–	–	X6CrNiTi18-10
SS 321H	1.4878	S32109	SUS 321H	–	–	–	X12CrNiTi18-9
SS 347	1.4550	S34700	SUS 347	–	08Ch18N12B	–	X6CrNiNb18-10
SS 347H	1.4961	S34709	SUS 347H	–	–	–	X6CrNiNb18-12
SS 904L	1.4539	N08904	SUS 904L	904S13	STS 317J5L	Z2 NCDU 25-20	X1NiCrMoCu25-20-5

Contact Neeka tubes today for a best offer & competitive quotation Of Stainless Steel Flanges

Please Call on +91 7700067892 or drop an E-Mail : sales@neekatubes.net

Stainless Steel Flanges Dimensions Chart

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS4087	PN14	95	67	4	M12	14
AS 2129 Flange	Table C	95	67	4	13	14
	Table D	95	67	4	13	14
	Table E	95	67	4	13	14
	Table F	95	67	4	13	14
	Table H	114	83	4	16	17
	Table J	114	83	4	16	17
ANSI B16.5	ANSI 150	89	60	4	13	16
	ANSI 300	95	67	4	13	16
	ANSI 600	95	67	4	13	16
	ANSI 900	121	83	4	19	22
	ANSI 1500	121	83	4	19	22
ISO 7005 (DIN) Flange	PN6	80	55	4	M10	11
	PN10	95	65	4	M12	14
	PN16	95	65	4	M12	14
	PN20	90	60.5	4	M14	16
	PN25	95	65	4	M12	14
	PN40	95	65	4	M12	14

Stainless Steel Flanges Weight Chart

CLASS	Nominal Pipe Size	SS Slip On Flange	SS Threaded Flange	SS Socket Weld Flange	SS Lap Joint Flange	SS Blind Flange	SS Weld Neck Flange
150 lb	½	1	1	2	1	2	2
	¾	2	2	2	2	2	2
	1	2	2	2	2	2	3
	1¼	3	3	3	3	3	3
	1½	3	3	3	3	4	4
	2	5	5	5	5	5	6
	2½	8	8	8	8	7	10
	3	9	9	9	9	9	11.5
	3½	11	12	11	11	13	12
	4	13	13	13	13	17	16.5
	5	15	15	15	15	20	21
	6	19	19	19	19	27	26
	8	30	30	30	30	47	42
	10	43	43	43	43	70	54
	12	64	64	64	64	123	88
	14	90	90	90	105	140	114
	16	106	98	98	140	180	140
	18	130	130	130	160	220	165
	20	165	165	165	195	285	197
	22	185	185	185	245	355	225
	24	220	220	220	275	430	268
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
300 lb	½	2	2	3	2	2	2
	¾	3	3	3	3	3	3
	1	3	3	3	3	4	4
	1¼	4.5	4.5	4	4.5	6	5
	1½	6.5	6.5	6	6.5	7	7
	2	7	7	7	7	8	9
	2½	10	10	10	10	12	12
	3	13	14	13	14.5	16	18
	3½	17	17	17	17	21	20
	4	23.5	24	22	24	28	26.5
	5	29	31	28	28	37	36
	6	39	39	39	39	50	45
	8	58	58	58	58	81	69
	10	81	81	81	91	124	100
	12	115	115	115	140	185	142
	14	165	165	165	190	250	206
	16	210	220	190	234	315	250
	18	253	280	250	305	414	320
	20	315	325	315	375	515	400
	22	370	370	370	435	640	465
	24	490	490	475	550	800	580
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
400 lb	½	2	2	2	2	2	3
	¾	3	3	3	3	3	3.5
	1	3.5	3.5	3.5	3.5	4	4
	1¼	4.5	4.5	4.5	4.5	6	4.5
	1½	6.5	6.5	6.5	6.5	8	8
	2	8	8	8	8	10	10
	2½	12	12	12	11	15	14
	3	15	15	15	14	20	18
	3½	21	21	21	20	29	26
	4	26	26	26	25	33	35
	5	31	31	31	29	44	43
	6	44	44	44	42	61	57
	8	67	67	67	64	100	89
	10	91	91	91	110	155	125
	12	130	130	130	152	226	175
	14	191	191	191	210	310	233
	16	253	253	253	280	398	295
	18	310	310	310	345	502	360
	20	378	378	378	420	621	445
	22	405	405	405	455	720	505
	24	539	539	539	615	936	640
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
600 lb	½	2	2	2	2	3	3
	¾	3	3	3	3	4	4
	1	4	4	4	4	4	4
	1¼	5	5	5	5	6	6
	1½	7	7	7	7	8	8
	2	9	9	9	9	10	12
	2½	13	13	13	12	15	18
	3	16	16	16	15	20	23
	3½	21	21	21	20	29	26
	4	37	37	37	36	41	42
	5	63	63	63	63	68	68
	6	80	80	80	78	86	81
	8	115	15	15	112	140	120
	10	177	177	177	195	231	190
	12	215	215	215	240	295	226
	14	259	259	259	290	378	347
	16	366	366	366	400	527	481
	18	476	476	476	469	665	555
	20	612	612	612	604	855	690
	22	590	590	590	670	1000	720
	24	876	876	876	866	1250	977
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
900 lb	½	6	6	6	6	4	7
	¾	6	6	6	6	6	7
	1	7.5	7.5	7.5	7.5	9	8.5
	1¼	10	10	10	10	10	10
	1½	14	14	14	14	14	14
	2	22	22	22	21	25	24
	2½	31	31	31	25	32	31
	3	36	36	36	29	35	36
	4	53	53	53	51	54	53
	5	83	83	83	81	87	86
	6	110	110	110	105	115	110
	8	172	172	172	190	200	187
	10	245	245	245	277	290	268
	12	326	326	326	371	415	372
	14	400	400	400	415	520	562
	16	459	459	459	488	619	685
	18	647	647	647	670	880	924
	20	792	792	792	868	1107	1164
	24	1480	1480	1480	1659	2099	2107
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
1500 lb	½	6	6	6	6	4	7
	¾	6	6	6	6	6	7
	1	8	8	8	8	9	9
	1¼	10	10	10	10	10	10
	1½	14	14	14	14	14	14
	2	25	25	25	25	25	25
	2½	36	36	36	35	35	36
	3	48	48	48	47	48	48
	4	73	73	73	75	73	73
	5	132	132	132	140	140	132
	6	165	165	165	170	160	165
	8	260	260	260	286	302	275
	10	436	436	436	485	510	455
	12	667	667	667	749	775	690
	14	940	940	940	890	975	940
	16	1250	1250	1250	1250	1300	1250
	18	1625	1625	1625	1475	1750	1625
	20	2050	2050	2050	1775	2225	2050
	24	2825	2825	2825	2825	3625	3325
CLASS	Nominal Pipe Size	Slip On	Threaded	Socket Weld	Lap Joint	Blind	Weld Neck
2500 lb	½	….	7	….	7	7	8
	¾	….	9	….	8	10	9
	1	….	12	….	12	12	13
	1¼	….	18	….	17	18	20
	1½	….	25	….	24	25	28
	2	….	38	….	37	39	42
	2½	….	55	….	53	56	52
	3	….	83	….	80	86	94
	4	….	127	….	122	133	146
	5	….	210	….	204	223	244
	6	….	323	….	314	345	378
	8	….	485	….	471	533	576
	10	….	925	….	897	1025	1068
	12	….	1300	….	1262	1464	1608

Stainless Steel Flanges Packing & Marking

Packaging & Marking

Every SS flange is securely packed in wooden cases, cartons and bubble wraps to prevent damage. Traceability is ensured with size, batch number and material grade. Efficient and trustworthy delivery services ensure timely dispatches all around the world.

Quality Testing

We ensure top-notch quality through advanced testing methods. PMI testing (emission & X-ray) verifies material composition, while ultrasonic and impact testing assess strength and integrity. Tensile, hardness and roughness tests verify durability and microscopic examination with dye penetration tests detect surface faults. Also, our IGC test labs test corrosion resistance, providing reliable and durable stainless steel flanges for industrial uses.

Searching for ready stock of Stainless Steel Flanges in Mumbai?

Industrial Application of Stainless Steel Flanges

Product Category

Request For Quotation

Do Not Hesitate to Get in Touch With Us. Within Two Business Days, We Will Respond to You. Or Give Us a Call Right Now.

Quick Contact

+91 7700067892

About Neeka Tubes

Neeka tubes is a notable vendor, provider, and exporter of raw materials like springs, tubes, plates, wires,hose clamps and many more.We offer our clients five-star dependable products and administrations with the most extensive level of specialized expertise and business administration during the creation and after deals.

Quick Contact

9, Moti Mansion Building, Ground Floor, 5th Khetwadi Lane,
Mumbai - 400004

sales@neekatubes.net

+91 7700067892

Find Us

Stainless Steel Flanges

Check Availability of Stainless Steel Flanges, High-Pressure Stainless Steel Flanges, Best Quality SS Flanges Manufacturer in India, We stock a range of SS Flanges.

Most Common Types of Stainless Steel Flanges

SS Blind Flange

SS Socket weld Flange

SS Slip on Flange

SS Weld Neck Flange

SS Threaded Flange

SS Spectacle Blind Flange

SS Ring Type Joint Flange

SS Lap Joint Flanges

SS Forged Flanges

SS Plate Flanges

SS Orifice Flanges