Alloy Steel F91 Weld Neck Flange

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About Alloy Steel F91 Weld Neck Flange

Experience elite engineering with our Alloy Steel F91 Weld Neck Flange, now with exclusive last chance markdowns for discerning customers. Precision-crafted by Indias leading exporter, manufacturer, supplier, and trader, this lavish, high-quality flange stands out with a flawless galvanized surface, dominant corrosion resistance, and robust stainless steel construction. Available in various sizes and multiple grades, its hot-rolled technics ensure consistent industrial performance. Elevate your operations with a component purpose-built for reliability and durability where quality meets exceptional value.

Elite Application & Competitive Advantages

The Alloy Steel F91 Weld Neck Flange is installed through precision welding, ensuring a secure and leak-proof connection in demanding industrial environments. This dominant component is favored for its superior corrosion resistance, flawless design, and ability to withstand extreme pressures. Leading manufacturers, EPC contractors, and industrial operators rely on its strength and versatility for critical pipelines, petrochemical systems, and power generation projects, choosing it for its lasting reliability and premium quality advantages.

Seamless Delivery, Certifications & Secure Packaging

Alloy Steel F91 Weld Neck Flange orders are delivered promptly and safely, adhering to international packaging standards to protect their flawless finish. Our team provides quotations after careful valuation of your specifications and order volume. Certified to global quality standards, including ISO and other industry requirements, each shipment is accompanied by full documentation, ensuring authenticity and compliance. Payment terms are tailored to client needs, supporting a transparent and efficient procurement process for every valued client.

SS Flanges Specification

Standards	ASTM A182 / ASME SA182
Dimensions	ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Size	1/2" (15 NB) to 48" (1200NB)
Class	150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standard	ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Flange Face Types	Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

SS Flange Dimensions

NPS (in.)	Stainless Steel Flange Dimensions
NPS (in.)	Dia. of Flange (in.)	No. of Bolts	Dia. of Bolts (in.)	Dia. of Bolt Holes (in.)	Bolt Circle (in.)
1/4	3-3/8	4	1/2	0.62	2-1/4
1/2	3-1/2	4	1/2	0.62	2-3/8
3/4	3-7/8	4	1/2	0.62	2-3/4
1	4-1/4	4	1/2	0.62	3-1/8
1-1/4	4-5/8	4	1/2	0.62	3-1/2
1-1/2	5	4	1/2	0.62	3-7/8
2	6	4	5/8	0.75	4-3/4
2-1/2	7	4	5/8	0.75	5-1/2
3	7-1/2	4	5/8	0.75	6
3-1/2	8-1/2	8	5/8	0.75	7
4	9	8	5/8	0.75	7-1/2
5	10	8	3/4	0.88	8-1/2
6	11	8	3/4	0.88	9-1/2
8	13-1/2	8	3/4	0.88	11-3/4
10	16	12	7/8	1	14-1/4
12	19	12	7/8	1	17
14	21	12	1	1.12	18-3/4
16	23-1/2	16	1	1.12	21-1/4
18	25	16	1-1/8	1.25	22-3/4
20	27-1/2	20	1-1/8	1.25	25
24	32	20	1-1/4	1.38	29-1/2

SS Flanges Weight Chart

Pipe Normal Diameter (inch)		Outer diameter Flange	Thicjness Of Flange Minimum	Diameter of Hub	Diameter of Raised Face	Length Hub.Y	Thread Length	Diameter of Bolt Circle	Diameter of Bolt Holes	Number of Bolts	Diameter of Bolts (inch)	KG	LB
1/2"	15	89.00	11.20	30.20	35.10	15.70	15.70	60.50	15.80	4	1/2"	0.4	0.9
3/4"	20	98.50	12.70	38.10	42.90	15.70	15.70	69.90	15.80	4	1/2"	0.7	1.5
1"	25	108.00	14.20	49.30	50.80	17.50	17.50	79.30	15.80	4	1/2"	0.8	1.8
1-1/4"	32	117.50	15.70	58.70	63.50	20.60	20.60	88.90	15.80	4	1/2"	1.2	2.6
1-1/2"	40	127.00	17.50	65.00	73.20	22.40	22.40	98.60	15.80	4	1/2"	1.5	3.3
2"	50	152.50	19.10	77.70	91.90	25.40	25.40	120.70	19.10	4	5/8"	2.3	5.1
2-1/2"	65	178.00	22.40	90.40	104.60	28.40	28.40	139.70	19.10	4	5/8"	3.7	8.1
3"	80	190.50	23.90	108.00	127.00	30.20	30.20	152.40	19.10	4	5/8"	4.1	9
3-1/2"	90	216.00	23.90	122.20	139.70	31.80	31.80	177.80	19.10	8	5/8"	5.1	11.2
4"	100	228.50	23.90	134.90	157.20	33.30	33.30	190.50	19.10	8	5/8"	5.9	13
5"	125	254.00	23.90	163.60	185.70	36.60	36.60	215.90	22.40	8	3/4"	7	15.4
6"	150	279.50	25.40	192.00	215.90	39.60	39.60	241.30	22.40	8	3/4"	8.4	18.5
8"	200	343.00	28.40	246.10	269.70	44.50	44.50	298.50	22.40	8	3/4"	13	28.6
10"	250	406.50	30.20	304.80	323.90	49.30	49.30	362.00	25.40	12	7/8"	18	39.5
12"	300	482.50	31.80	365.30	381.00	55.60	55.60	431.80	25.40	12	7/8"	29	64
14"	350	533.50	35.10	400.10	412.80	57.20	57.20	476.30	28.50	12	1"	39	86
16"	400	597.00	36.60	457.20	469.90	63.50	63.50	539.80	28.50	16	1"	47	103
18"	450	635.00	39.60	505.00	533.40	68.30	68.30	577.90	31.80	16	1 1/8"	57	126
20"	500	698.50	42.90	558.80	584.20	73.20	73.20	635.00	31.80	20	1 1/8"	76	167
24"	600	813.00	47.80	663.40	692.20	82.60	82.60	749.30	35.10	20	1 1/4"	97	214

Stainless Steel Flange Pressure Rating Chart

ASME	Pressure Temperature Ratings For Stainless Steel Flanges
Temperature °F	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
-20 to 100	275	720	960	1440	2160	3600	6000
200	230	600	800	1200	1800	3000	5000
300	205	540	720	1080	1620	2700	4500
400	190	495	660	995	1490	2485	4140
500	170	465	620	930	1395	2330	3880
600	140	435	580	875	1310	2185	3640
650	125	430	575	860	1290	2150	3580
700	110	425	565	850	1275	2125	3540
750	95	415	555	830	1245	2075	3460
800	80	405	540	805	1210	2015	3360
850	65	395	530	790	1190	1980	3300
900	50	390	520	780	1165	1945	3240
950	35	380	510	765	1145	1910	3180
1000	20	320	430	640	965	1605	2675
1050	20	310	410	615	925	1545	2570
1100	20	255	345	515	770	1285	2145
1150	20	200	265	400	595	995	1655
1200	20	155	205	310	465	770	1285
1250	20	115	150	225	340	565	945
1300	20	85	115	170	255	430	715
1350	20	60	80	125	185	310	515
1400	20	50	65	95	145	240	400
1450	15	35	45	70	105	170	285
1500	10	25	35	55	80	135	230

FAQs of Alloy Steel F91 Weld Neck Flange:

Q: How is the Alloy Steel F91 Weld Neck Flange typically used in industrial settings?

A: The Alloy Steel F91 Weld Neck Flange is commonly used to connect pipes, valves, and other equipment in industries where high pressure and temperature resistance are critical, such as oil and gas, petrochemicals, and power generation.

Q: What makes this flange dominant compared to other materials?

A: Its flawless, galvanized stainless steel build offers superior corrosion resistance, while hot-rolled technics provide exceptional durability. The product is also available in multiple grades and sizes, making it suitable for a variety of demanding applications.

Q: When should industries choose a weld neck flange over other flange types?

A: Weld neck flanges are ideal when leak-proof, secure connections are needed for high-pressure or high-temperature pipelines, as their design allows the flange to handle mechanical stress more efficiently than other types.

Q: Where does Alloy Steel F91 Weld Neck Flange excel in performance?

A: It excels in applications that require corrosion resistance, high strength, and endurance under extreme pressures and temperatures especially in process plants, power facilities, and chemical refineries.

Q: What is the process for ordering and receiving a quotation?

A: You can submit your requirements and specifications to receive a detailed quotation after proper valuation. Our support team ensures the entire process is seamless, including clarification on payment terms and delivery schedules.

Q: What are the benefits of sourcing from a leading exporter and supplier in India?

A: Working with an elite Indian supplier means access to certified, high-quality products, competitive pricing, timely deliveries, and compliance with international standards for industrial flanges.

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