Stainless Steel Flanges Manufacturer & Exporter in India

ASTM A182 Weld Neck Flange |SS Flange & Forged Stainless Steel Flanges | Ferritic Stainless Steel Flanges Manufacturers in India.

Solitaire Overseas, located in Mumbai, India, is a renowned manufacturer specializing in the forging and machining of stainless steel flanges. Our product range includes both small and large diameter flanges, catering to a variety of pressure classes and material grades. We are dedicated to delivering high-quality solutions that meet diverse industrial needs.

Our 304 and 316 stainless steel forged flanges are known for their durability and excellent resistance to corrosion. Backed by advanced technology and a skilled team of researchers, we ensure all products meet stringent global quality standards. Our duplex forged flanges are highly sought after for their reliability and competitive pricing, with quick delivery to meet tight project deadlines.

As a leading manufacturer and exporter in India, Solitaire Overseas is committed to offering customized flanges tailored to client specifications. With a focus on quality, innovation, and customer satisfaction, we have built a reputation as a dependable partner for industries worldwide.

Solitaire Overseas is a trusted stockist of 304 and 316 forged flanges, known for their exceptional durability and corrosion resistance. We adhere to international quality standards, leveraging advanced machinery and a team of experienced research analysts to meet diverse client requirements. Our commitment to quality assurance and rigorous testing has helped us build a strong reputation in the stainless steel flange manufacturing industry.

Based in Mumbai, India, Solitaire Overseas is recognized as one of the top manufacturers, exporters, and suppliers of stainless steel flanges. We produce duplex flanges in sizes ranging from 1/2 NPS to 40 NPS (15 NB to 1000 NB), catering to industries such as pipelines, marine, power, wastewater, and food processing. Our flanges are manufactured to comply with international standards, including ASME/ANSI, EN, DIN, JIS, and more, and can be customized to meet specific client needs.

Our stainless flanges are designed to deliver outstanding mechanical performance. Using tube billets as raw material, the forging process eliminates defects like segregation and ensures superior quality. These flanges are commonly welded to pipes or threaded to pipe ends, providing a secure and reliable connection. Each product undergoes meticulous inspection and testing by our skilled workforce to ensure it meets the highest standards.

Solitaire Overseas is proud to be a leading exporter of high-quality stainless steel flanges, supplying to more than 70 countries worldwide. Certified to EN 10204/3.1 and EN 10204/3.2 standards, our flanges are also available with third-party inspection for added assurance. With a dedicated team and advanced facilities, we continue to serve global markets with reliable, precision-engineered products.

Stainless Steel Flanges Specifications

Size Range	1/2 NPS to 40 NPS (15 NB to 1000 NB)
Class	150#, 300#, 400#, 600#, 900#, 1500#, 2500#, PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100
Grades	F-304, 304L, 304H, 304N, 304LN, 316, 316L, 316H, 316Ti, 316N, 316LN, 310, 317, 317L, 321, 321H, 347, 347H, 904L F-51, 53, 55, 60, 68
Specifications	ASTM, ASME, DIN EN
Type	SO, WN, SW, BL, THRD, Lap Joint, Orifice Type, Reducing Flanges, Spectacle Blind
Face	RF, FF, RTJ, T&G
Applications	Pipeline engineering Marine industry Power industry Oil & gas industry Waste water management Aerospace Plant engineering Chemical industry Food processing

Stainless Steel Flanges Chemical Composition

Type	C	Mn	P	S	Si	Cr	Ni	Mb
302	0.15	2.00	0.045	0.030	1.00	17.00/19.00	8.00/10.00	–
304	0.08	2.00	0.045	0.030	1.00	18.00/20.00	8.00/10.50	–
304L	0.03	2.00	0.045	0.030	1.00	18.00/20.00	8.00/12.00	–
309	0.20	2.00	0.045	0.030	1.00	22.00/24.00	12.00/15.00	–
309S	0.08	2.00	0.045	–	1.00	22.00/24.00	–	–
310	0.25	2.00	0.045	0.030	1.5	24.00/26.00	19.00/22.00	–
310S	0.08	2.00	0.045	0.030	1.5	24.00/26.00	19.00/22.00	–
316	0.08	2.00	0.045	0.030	1.00	16.00/18.00	10.00/14.00	2.00/3.00
316L	0.03	2.00	0.045	0.030	1.00	16.00/18.00	10.00/14.00	2.00/3.00
317	0.08	2.00	0.045	0.030	1.00/1.00	18.00/20.00	11.00/15.00	3.00/4.00
317L	0.03	2.00	0.045	0.030	0.75	18.00/20.00	11.00/15.00	3.00/4.00
321	0.08	2.00	0.040	0.030	1.00	17.00/19.00	9.00/12.00	0.75/0.75
347	0.08	2.00	0.040	0.030	0.5/1.00	17.00/19.00	9.00/12.00	0.5/0.75

Stainless Steel Pipe Flanges Mechanical Properties

Type	UNS	Tensile (ksi) min	Yield (ksi) min	Elongation min	Hardness (Brinell) max	Hardness (Rockwell B) max
302	S30200	75	30	40% in 2″	183	88
304	S30400	75	30	40% in 2″	183	88
304L	S30403	70	30	40% in 2″	183	88
309	S30900	75	30	40% in 2″	217	95
309S	S30908	75	30	40% in 2″	217	95
310	S31000	75	30	40% in 2″	217	95
310S	S31008	75	30	40% in 2″	217	95
316	S31600	75	30	40% in 2″	217	95
316L	S31603	70	25	35% in 2″	217	95
317	S31700	75	30	35% in 2″	217	95
317L	S31703	75	30	35% in 2″	217	95
321	S32100	75	30	40% in 2″	183	88
347	S34700	75	30	40% in 2″	183	88

SS slip on Flange Equivalent Grade

Standard	Werkstoff Nr.	AFNOR	UNS	BS	JIS	GOST	EN
SS 304	1.4301	Z7CN18-09	S30400	304S31	SUS	08X18H10	X5CrNi18-10
SS 304L	1.4306/1.4307	Z3CN18-10	S30403	304S11	SUS 304L	03X18H11	X2CrNi18-9/X2CrNi19-11
SS 316	1.4401/1.4436	Z7CND17-11-02	S31600	316S31/316S33	–	–	X5CrNiMo17-12-2/X3CrNiMo17-13-3
SS 316L	1.4404/1.4435	Z3CND17-11-02/Z3CND18-14-03	S31603	316S11/316S13	316L	03X17H14M3/03X17H14M2	X2CrNiMo17-12-2/X2CrNiMo18-14-3

Stainless Steel Flange Applications

Chrome Moly Tubes in various Application Industries

Oil & Gas Industry
Stainless steel flanges are vital in the oil and gas industry for their strength and corrosion resistance. They withstand extreme pressures and temperatures in pipelines and drilling operations, ensuring safe and reliable transport of oil, gas, and petroleum products. Their resistance to harsh chemicals makes them indispensable for critical connections.

Chemical Processing
In chemical plants, stainless steel flanges connect pipes and equipment handling corrosive substances. Grades like 316 stainless steel, enriched with molybdenum, offer superior corrosion resistance. This ensures long-lasting, safe operation in environments exposed to aggressive chemicals.

Food & Beverage Industry
Stainless steel flanges are ideal for hygienic applications in the food and beverage sector. Their smooth, non-porous surface prevents bacterial growth and meets strict health standards. They are widely used in sanitary piping and equipment for food-grade processing.

Power Generation
In power plants, these flanges connect components like boilers, turbines, and heat exchangers in high-temperature environments. Their excellent strength and heat resistance ensure reliability under extreme stress, supporting safe and efficient power generation.

FAQS

Stainless steel flanges connect pipelines in industries like oil and gas, chemicals, and water treatment, allowing for easier assembly, disassembly, maintenance, and repairs of pipe sections.

Types of Flanges 1. Welding Neck Flange 2. Slip on Flange 3. Socket Welding Flange 4.

Stainless steel flanges are typically made from grades like ASTM A182 F304/F304L and F316/F316L, offering excellent corrosion resistance. They suit pressure ratings from Class 150 to 2500.