REPUTE STEEL ENGINEERING COMPANY | Manufacturer & Exporter in India

Manufacturer Stockist and Exporter of Weld Neck Flanges in India

Weld Neck Flanges (WNRF) are specialized components used in high-pressure systems where reliable sealing and long-term durability are required. Epute Steel & Engineering Company, a leading manufacturer in India, offers Carbon Steel Weld Neck Flanges and Stainless Steel Weld Neck Flanges, ensuring premium quality and precise engineering.

Weld Neck Flanges feature a long tapered hub and are designed for butt-weld connections to piping. Their robust design helps in reducing stress concentration, ensuring excellent flow integrity, and preventing leakage even under extreme conditions. These flanges are particularly preferred for high-temperature and high-pressure applications.

Specification of WNRF Flange

Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175
ASME B16.5 Weld Neck Flange Size Chart	1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Raised Face Weld Neck Flange Standards	ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Reducing Weld Neck Flange Pressure Calculation in DIN	6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 rtj long weld neck flange
JIS	5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Reducing Weld Neck Flange
UNI	6Bar 10Bar 16Bar 25Bar 40Bar Raised Face Weld Neck Flange
WNRF Flange Pressure Rating ANSI	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Flat Face Weld Neck Flange
EN	6Bar 10Bar 16Bar 25Bar 40Bar Welding Neck Flange
Most common types of Carbon Steel Weld Neck Flange	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
Stainless steel long weld neck flange Coating	Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Carbon steel long weld neck flange
Connect Type/ Flange Face Type	Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & 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
Test	Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Heavy barrel long weld neck flange Equipment	Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Manufacturer of	ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. WNRF Flange: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange B.S: BS4504 , BS3293, BS1560, BS10 AS 2129: Table D; Table E; Table H 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 American standard (ANSI) German (DIN) British standard (BS) 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 Welding Neck Flange The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Origin	Indian / West Europe / Japan / USA / Korean
Raised Face Weld Neck Flange Uses & application	Bitumen upgraders. Heavy oil refineries. Nuclear power (mostly seamless). Petrochemicals and acids.
Export to	Indonesia, Ukraine, India, Ireland, Singapore, Saudi Arabia, Spain, Dubai, Peru, Thailand, Korea, Iran, Canada, USA, Brazil, Egypt, Oman, etc

Material of Reducing Weld Neck Flange

Carbon Steel Flat Face Weld Neck Flange	A105 Weld Neck Flange A350 LF2 Reducing Weld Neck Flange
Austenitic Stainless Steel PN16 WNRF Flange	A182 Gr F304 Welding Neck Flange A182 Gr F316 Reducing Weld Neck Flange A182 Gr F321 WNRF Flange A182 Gr F347 Weld Neck Flange A182 Gr F304L Raised Face Weld Neck Flange A182 Gr F316L Flat Face Weld Neck Flange A182 Gr F317 Reducing Weld Neck Flange A182 Gr F317L WNRF Flange A182 Gr F321 Raised Face Weld Neck Flange A182 Gr F310 PN16 WNRF Flange A182 Gr 347 Weld Neck Flange
Alloy Steel High-Temp Reducing Weld Neck Flange	A182 Gr F1 Raised Face Weld Neck Flange A182 Gr F11 WNRF Flange A182 Gr F12 Flat Face Weld Neck Flange A182 Gr F22 Class 300 long weld neck flange A182 Gr F5 PN16 WNRF Flange A182 Gr F9 Reducing Weld Neck Flange
Alloy Steel Low-Temp Welding Neck Flange	A350 Gr LF2 WNRF Flange A350 Gr LF3 Weld Neck Flange
Nickel Alloy WNRF Flange	ASTM B564 PN16 WNRF Flange ASTM B564 UNS N06600 WNRF Flange ASTM B564 UNS N06625 Welding Neck Flange ASTM B564 UNS No4400 Reducing Weld Neck Flange ASTM B564 UNS N08810 WNRF Flange ASTM B564 UNS N08811 Raised Face Weld Neck Flange ASTM B564 UNS N08825 Class 300 long weld neck flange ASTM B564 UNS N04400 Reducing Weld Neck Flange ASTM B564 UNS N10276 Flat Face Weld Neck Flange ASTM B564 UNS N10665 PN16 WNRF Flange
Titanium Welding Neck Flange	ASTM B381 Grade F2 PN16 WNRF Flange ASTM B381 F5 Flat Face Weld Neck Flange ASTM B381 F3 RTJ long weld neck flange ASTM B381 F12 Reducing Weld Neck Flange ASTM B381 F7 WNRF Flange Other grades: ASTM B381 F1, F2, F2H, F3, F4, F5, F6, F7, F7H, F9, F10, F11, F12, F13, F14, F15, F16, F16H, F17, F18, F19, F20, F21, F23, F24, F25, F26 , F26H, F27, F28, F29, F30, F31, F32, F33, F34, F35, F36, F37, F38 Raised Face Weld Neck Flange

Welding Neck Flange Types

Weld neck flange en 1092 1

ASME B16.47 Series b Weld Neck Ring Joint Flange

WNRF Class 150 Flanges

AWWA C207 Class d Reducing Flange

Weld Neck Flange Class 300

ASTM A694 F42 Welding Neck Flange En 1092-1

Weld neck flange pn16

MSS SP-44 groove weld neck flange

Titanium WNRF Reducing Flange

ASME B16.5 WNRF Flange

ASME B16.47 Series a WNRF Pipe Flange

ANSI B16.5 Weld Neck Pipe Flange

Stainless Steel Weld Neck Flange

ANSI B16 5 Long Weld Neck Flange

ASME B16.5 Weld Neck Flange

Forged Weld Neck Reducing Flange

Welding Neck Flange Dimensions

Size in Inch	Size in mm	Outer Diameter	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	Bore	RF Diameter	RF Height	PCD	Weld Face
		A	B	C	D	E	F	G	H	I	J
1/2	15	90	9.6	30	21.3	46	Refer Note	34.9	2	60.3	1.6
3/4	20	100	11.2	38	26.7	51		42.9	2	69.9	1.6
1	25	110	12.7	49	33.4	54		50.8	2	79.4	1.6
1 1/4	32	115	14.3	59	42.2	56		63.5	2	88.9	1.6
1 1/2	40	125	15.9	65	48.3	60		73	2	98.4	1.6
2	50	150	17.5	78	60.3	62		92.1	2	120.7	1.6
2 1/2	65	180	20.7	90	73	68		104.8	2	139.7	1.6
3	80	190	22.3	108	88.9	68		127	2	152.4	1.6
3 1/2	90	215	22.3	122	101.6	70		139.7	2	177.8	1.6
4	100	230	22.3	135	114.3	75		157.2	2	190.5	1.6
5	125	255	22.3	164	141.3	87		185.7	2	215.9	1.6
6	150	280	23.9	192	168.3	87		215.9	2	241.3	1.6
8	200	345	27	246	219.1	100		269.9	2	298.5	1.6
10	250	405	28.6	305	273	100		323.8	2	362	1.6
12	300	485	30.2	365	323.8	113		381	2	431.8	1.6
14	350	535	33.4	400	355.6	125		412.8	2	476.3	1.6
16	400	595	35	457	406.4	125		469.9	2	539.8	1.6
18	450	635	38.1	505	457.2	138		533.4	2	577.9	1.6
20	500	700	41.3	559	508	143		584.2	2	635	1.6
24	600	815	46.1	663	610	151		692.2	2	749.3	1.6

Weld Neck Flange Class 300 Dimensions

Size in Inch	Size in mm	Outer Diameter	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	Bore	RF Diameter	RF Height	PCD	Weld Face
		A	B	C	D	E	F	G	H	I	J
1/2	15	95	12.7	38	21.3	51	Refer Note	34.9	2	66.7	1.6
3/4	20	115	14.3	48	26.7	56		42.9	2	82.6	1.6
1	25	125	15.9	54	33.4	60		50.8	2	88.9	1.6
1 1/4	32	135	17.5	64	42.2	64		63.5	2	98.4	1.6
1 1/2	40	155	19.1	70	48.3	67		73	2	114.3	1.6
2	50	165	20.7	84	60.3	68		92.1	2	127	1.6
2 1/2	65	190	23.9	100	73	75		104.8	2	149.2	1.6
3	80	210	27	117	88.9	78		127	2	168.3	1.6
3 1/2	90	230	28.6	133	101.6	79		139.7	2	184.2	1.6
4	100	255	30.2	146	114.3	84		157.2	2	200	1.6
5	125	280	33.4	178	141.3	97		185.7	2	235	1.6
6	150	320	35	206	168.3	97		215.9	2	269.9	1.6
8	200	380	39.7	260	219.1	110		269.9	2	330.2	1.6
10	250	445	46.1	321	273	116		323.8	2	387.4	1.6
12	300	520	49.3	375	323.8	129		381	2	450.8	1.6
14	350	585	52.4	425	355.6	141		412.8	2	514.4	1.6
16	400	650	55.6	483	406.4	144		469.9	2	571.5	1.6
18	450	710	58.8	533	457	157		533.4	2	628.6	1.6
20	500	775	62	587	508	160		584.2	2	685.8	1.6
24	600	915	68.3	702	610	167		692.2	2	812.8	1.6

Weld Neck Flanges Class 400 Dimensions

Size in Inch	Size in mm	Outer Diameter	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	Bore	RF Diameter	RF Height	PCD	Weld Face
		A	B	C	D	E	F	G	H	I	J
1/2	15	95	14.3	38	21.3	52	Refer Note	34.9	7	66.7	1.6
3/4	20	115	15.9	48	26.7	57		42.9	7	82.6	1.6
1	25	125	17.5	54	33.4	62		50.8	7	88.9	1.6
1 1/4	32	135	20.7	64	42.2	67		63.5	7	98.4	1.6
1 1/2	40	155	22.3	70	48.3	70		73	7	114.3	1.6
2	50	165	25.4	84	60.3	73		92.1	7	127	1.6
2 1/2	65	190	28.6	100	73	79		104.8	7	149.2	1.6
3	80	210	31.8	117	88.9	83		127	7	168.3	1.6
3 1/2	90	230	35	133	101.6	86		139.7	7	184.2	1.6
4	100	255	35	146	114.3	89		157.2	7	200	1.6
5	125	280	38.1	178	141.3	102		185.7	7	235	1.6
6	150	320	41.3	206	168.3	103		215.9	7	269.9	1.6
8	200	380	47.7	260	219.1	117		269.9	7	330	1.6
10	250	445	54	321	273	124		323.8	7	387.4	1.6
12	300	520	57.2	375	323.8	137		381	7	450.8	1.6
14	350	585	60.4	425	355.6	149		412.8	7	514.4	1.6
16	400	650	63.5	483	406.4	152		469.9	7	571.5	1.6
18	450	710	66.7	533	457	165		533.4	7	628.6	1.6
20	500	775	69.9	587	508	168		584.2	7	685.8	1.6
24	600	915	76.2	702	610	175		692.2	7	812.8	1.6

Weld Neck Flange Class 600 Dimensions

Size in Inch	Size in mm	Outer Diameter	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	Bore	RF Diameter	RF Height	PCD	Weld Face
		A	B	C	D	E	F	G	H	I	J
1/2	15	95	14.3	38	21.3	52	Refer Note	34.9	7	66.7	1.6
3/4	20	115	15.9	48	26.7	57		42.9	7	82.6	1.6
1	25	125	17.5	54	33.4	62		50.8	7	88.9	1.6
1 1/4	32	135	20.7	64	42.2	67		63.5	7	98.4	1.6
1 1/2	40	155	22.3	70	48.3	70		73	7	114.3	1.6
2	50	165	25.4	84	60.3	73		92.1	7	127	1.6
2 1/2	65	190	28.6	100	73	79		104.8	7	149.2	1.6
3	80	210	31.8	117	88.9	83		127	7	168.3	1.6
3 1/2	90	230	35	133	101.6	86		139.7	7	184.2	1.6
4	100	275	38.1	152	114.3	102		157.2	7	215.9	1.6
5	125	330	44.5	189	141.3	114		185.7	7	266.7	1.6
6	150	355	47.7	222	168.3	117		215.9	7	292.1	1.6
8	200	420	55.6	273	219.1	133		269.9	7	349.2	1.6
10	250	510	63.5	343	273	152		323.8	7	431.8	1.6
12	300	560	66.7	400	323.8	156		381	7	489	1.6
14	350	605	69.9	432	355.6	165		412.8	7	527	1.6
16	400	685	76.2	495	406.4	178		469.9	7	603.2	1.6
18	450	745	82.6	546	457	184		533.4	7	654	1.6
20	500	815	88.9	610	508	190		584.2	7	723.9	1.6
24	600	940	101.6	718	610	203		692.2	7	838.2	1.6

Welding Neck Flanges 900 LBS Dimensions

Size in Inch	Size in mm	Outer Diameter	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	Bore	RF Diameter	RF Height	PCD	Weld Face
		A	B	C	D	E	F	G	H	I	J
1/2	15	120	22.3	38	21.3	60	Refer Note	34.9	7	82.6	1.6
3/4	20	130	25.4	44	26.7	70		42.9	7	88.9	1.6
1	25	150	28.6	52	33.4	73		50.8	7	101.6	1.6
1 1/4	32	160	28.6	64	42.2	73		63.5	7	111.1	1.6
1 1/2	40	180	31.8	70	48.3	83		73	7	123.8	1.6
2	50	215	38.1	105	60.3	102		92.1	7	165.1	1.6
2 1/2	65	245	41.3	124	73	105		104.8	7	190.5	1.6
3	80	240	38.1	127	88.9	102		127	7	190.5	1.6
4	100	290	44.5	159	114.3	114		157.2	7	235	1.6
5	125	350	50.8	190	141.3	127		185.7	7	279.4	1.6
6	150	380	55.6	235	168.3	140		215.9	7	317.5	1.6
8	200	470	63.5	298	219.1	162		269.9	7	393.7	1.6
10	250	545	69.9	368	273	184		323.8	7	469.9	1.6
12	300	610	79.4	419	323.8	200		381	7	533.4	1.6
14	350	640	85.8	451	355.6	213		412.8	7	558.8	1.6
16	400	705	88.9	508	406.4	216		469.9	7	616	1.6
18	450	785	101.6	565	457	229		533.4	7	685.8	1.6
20	500	855	108	622	508	248		584.2	7	749.3	1.6
24	600	1040	139.7	749	610	292		692.2	7	901.7	1.6

Weld Neck Flange Tolerances

Dimension	Flange	Tolerance
A	Outside Diameter	When O.D. is 24" or less: ±1/16" (1.6mm) When O.D. is over 24": ±1/8" (3.2mm)
D	Inside Diameter	10" and smaller: ±1/32" (0.8mm) 12" thru 18": +1/8" (3.2mm) 20" and larger: -1/16" (1.6mm)
B	Diameter of contact face	1/16" raised face: ±1/32" (0.8mm) 1/4" Raised Face, Tongue & Groove (male & female): ±1/64" (0.4mm)
J	Diameter of hub at base	When hub base is 24" or smaller: ±1/16" (1.6mm) When hub base is over 24": ±1/8" (3.2mm)
H	Diameter of hub at point of welding	5" and smaller: +3/32" (2.4mm), -1/32" (0.8mm) 6" and larger: +5/32" (4.0mm), -1/32 (0.8mm)
P	Drilling	Bolt circle: ±1/16" (1.6mm) Bolt hole spacing: ±1/32" (0.8mm)
	Eccentricity of bolt circle with respect to facing	2 1/2" and smaller ±1/32" (0.8mm) max. 3" and larger ±1/16" (1.6mm) max.
C	Thickness	18" and smaller: ±1/8" (3.2mm), -0" 20" and larger: ±3/16" (4.8mm), -0"
K	Length of hub	10" and smaller: ±1/16" (1.6mm) 12" and larger: ±1/8" (3.2mm)

Countries we have exported our products to

manufacturer stockist and exporter of Weld Neck Flanges in mumbai,manufacturer stockist and exporter of Weld Neck Flanges in India,manufacturer stockist and exporter of Weld Neck Flanges in United Arab Emirates,manufacturer stockist and exporter of Weld Neck Flanges in Saudi Arabia,manufacturer stockist and exporter of Weld Neck Flanges in Kuwait,manufacturer stockist and exporter of Weld Neck Flanges in Bahrain Qatar,manufacturer stockist and exporter of Weld Neck Flanges in Oman, manufacturer stockist and exporter of Weld Neck Flanges in USATurkey, Thailand, Bulgaria, Serbia, Mexico, Estonia, Trinidad & Tobago,Tunisia, New Zealand, Indonesia, Puerto Rico, Ireland, India, Morocco, Brazil, Lebanon, Hong Kong, Jordan, Ukraine, Switzerland, Czech Republic, Lithuania, Sri Lanka, Greece, Taiwan, Zimbabwe, Algeria, Romania, Mexico, Ghana, Italy, Philippines, Spain, United Kingdom, Finland, Azerbaijan, Japan, Macau, Israel, Saudi Arabia, Kenya, Bhutan, Poland, Poland, Costa Rica, Kuwait, Singapore, Pakistan, France, Colombia, Tibet, Bolivia, Portugal, Iraq, Australia, Kazakhstan, Nepal, Mongolia, Gambia, Malaysia, Chile, Germany, Slovakia, China, Bahrain, Denmark, Angola, Afghanistan, Peru, Austria, Ecuador, Gabon, Croatia, South Africa, Sweden, Chile, Hungary, United Arab Emirates, Argentina, Bangladesh, Oman, Egypt, United States, Belgium, Canada, Namibia, Norway, Qatar, Belarus, Netherlands.

Cities we have exported our products to

Bengaluru, Vung Tau, Nashik, Jaipur, Navi Mumbai, La Victoria, Al Jubail, Noida, Granada, Doha, Dammam, Ernakulam, Chandigarh, Santiago, Melbourne, Surat, Nagpur, Ranchi, Kanpur, Jakarta, Ahvaz, Indore, Jamshedpur, Muscat, Rajkot, Lahore, Chiyoda, Milan, Hong Kong, Riyadh, Houston, Busan, Calgary, Madrid, Visakhapatnam, Atyrau, Bhopal, Algiers, Colombo, Kolkata, Petaling Jaya, Dallas, London, Cairo, Thiruvananthapuram, Caracas, Howrah, Moscow, Port-of-Spain, Baroda, Mexico City, Gurgaon, Singapore, Aberdeen, Coimbatore, Kuala Lumpur, Perth, Ahmedabad, New York, New Delhi, Manama, Abu Dhabi, Montreal, Jeddah, Pune, Vadodara, Kuwait City, Chennai, Geoje-si, Tehran, Mumbai, Hanoi, Karachi, Pimpri-Chinchwad, Thane, Haryana, Ulsan, Seoul, Dubai, Ho Chi Minh City, Toronto, Hyderabad, Los Angeles, Faridabad, Lagos, Sydney, Courbevoie, Bangkok, Bogota, Rio de Janeiro, Ankara, Al Khobar, Ludhiana, Istanbul, Gimhae-si, Brisbane, Edmonton, Sharjah, Secunderabad, Gujrat manufacturer stockist and exporter of Weld Neck Flanges in Bengaluru,manufacturer stockist and exporter of Weld Neck Flanges in Chennai,manufacturer stockist and exporter of Weld Neck Flanges in Hyderabad,manufacturer stockist and exporter of Weld Neck Flanges in Gujarat,manufacturer stockist and exporter of Weld Neck Flanges in Pune

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