Stainless Steel 310/310S Flanges Manufacturer
Midland Alloys Inc. is one of the leading and trusted suppliers of Stainless Steel 310/310S flanges in India. These flanges are made from high-temperature stainless steel grades known for their excellent strength and resistance to oxidation at elevated temperatures. Grade 310S is the low-carbon version of 310, offering better weldability and a lower risk of carbide buildup during welding. Both grades work well in high-heat environments like furnaces and heat treatment setups. It performs under pressure, has great weldability, and is resistant to thermal shock. These flanges, such as ANSI B16.5 Stainless Steel 310 Blind Flanges are available in various sizes, thicknesses, and pressure ratings. Widely used in chemical plants, thermal equipment, and industrial systems, 310S stainless steel flanges deliver reliability where it matters. We provide high-quality flanges, competitive pricing and timely delivery. Contact us today to receive the best stainless steel 310 price for your project.
Stainless Steel 310/310S Flanges Overview
Stainless Steel 310/310S flanges are strong, heat-resistant components made to connect piping systems with a leak-proof, secure seal. These flanges are built for high-temperature and corrosive environments, making them a dependable choice for industries that need strength, safety and long service life. SS 310 and 310S are high-alloy austenitic stainless steels. The main difference is carbon content such as , 310S has less carbon content than 310. This makes 310S better for welding and reduces the risk of carbide precipitation, especially in high-heat setups.
Our flanges maintain tight, high-strength joints that can handle pressure and temperature changes without losing performance. We offer a full range of types, including weld neck, slip-on, blind, socket weld, threaded, lap joint, and Alloy 310S socket weld flanges, available in standard or custom sizes to match different pressure classes and system needs.
We use high-quality materials for A182 F310/F310S flanges that meet international standards. These flanges perform well in aggressive media and elevated temperatures. They don’t crack or lose strength when pressure or heat changes suddenly. Each flange is made to fit securely and seal tightly, reducing maintenance and boosting system safety. As trusted 310 SS flanges suppliers, we deliver quality at competitive prices with a reliable turnaround. These flanges require minimum maintenance, have a long lifespan and perform well in harsh environments such as chemical, thermal, or mechanical.
Benefits of Stainless Steel 310/310S Flanges
SS 310/310S flanges are widely used for their excellent durability, corrosion resistance, and reliability in demanding environments. ANSI B16.5 Stainless Steel 310S Flanges are made of high-quality stainless steel and provide secure connections, and long-lasting performance in a variety of fields.
- Superior Heat & Oxidation Resistance: Performs reliably at high temperatures up to 1150°C, resisting scaling and thermal damage.
- High Strength and Durability: Made from high-quality stainless steel to ensure the structure stays strong even under pressure.
- Built for Demanding Environments: Withstands extreme heat, pressure, and corrosion—ideal for chemical plants and power systems.
- Standard & Custom Sizes Available: Available in a variety of diameters and pressure ratings to meet unique project requirements.
- Leak-Proof and Secure Fit: Designed with precision to make sure that high-performance piping systems have tight, reliable connections.
- Easy to Weld, Shape & Install: DIN 1.4845 SS 310S flanges offer smooth weldability, and simple fabrication with low maintenance.
- Long-Term Mechanical Stability: Retains strength and sealing ability under continuous use and harsh operating conditions.
- Competitive Pricing & Global Reach: We offer affordable prices and on-time delivery to customers in both local and worldwide markets.
ASTM A182 Stainless Steel 310 / 310S Flange Specification
The key technical specifications of ASTM A182 SS 310/310S flanges include size range, pressure ratings, and available types.
1/2" (15 NB) to 48" (1200NB)
ASTM A182 / ASME SA182
ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Threaded / Screwed / Forged / Plate
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Forging, Rolling, Casting
FNPT, NPT, BSPT, MNPT, BSPP
Types of Stainless Steel 310/310S Flanges
Stainless Steel 310/310S flanges come in various types, each designed to suit different connection styles and piping setups. Below are the most common flange types, with a short explanation of their structure and function.
Manufacturing Types
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SORF (Slip-On Raised Face)Slides over the pipe and gets welded for easy installation in low-pressure systems.
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BLRF (Blind Raised Face)Closes off pipe ends; used for testing or sealing flow in a system.
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SWRF (Socket Weld Raised Face)Pipe fits into a recessed area and is welded around the edge. Ideal for small-bore, high-pressure lines.
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WNRF (Weld Neck Raised Face)Has a long, tapered hub and welds to the pipe for strong, leak-proof joints under high pressure.
Face Forms
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Raised Face (RF)The most common type has a raised surface that improves gasket sealing in medium to high pressure.
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Ring Type Joint (RTJ)Uses a metal ring for sealing and works well in high-pressure, high-temperature services.
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Flat Face (FF)Flat surface flange used with cast iron or low-pressure piping where full face gasket is needed.
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Lap-Joint Face (LJF)Used with stub ends and are easy to align and install. Good for systems that need frequent dismantling.
Contact us today to discuss how Stainless Steel 310/310S Flanges can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
The international equivalent grades of SS 310/310S make it easy to match specifications across different global standards such as UNS, WERKSTOFF, and EN.
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 310 | 1.4841 | S31000 | SUS 310 | 310S24 | 20Ch25N20S2 | – | X15CrNi25-20 |
| SS 310S | 1.4845 | S31008 | SUS 310S | 310S16 | 20Ch23N18 | – | X8CrNi25-21 |
This table provides the detailed chemical composition of stainless steel 310 and 310S flanges, showcasing the percentages of elements like chromium, nickel, and carbon that contribute to their high-temperature strength and corrosion resistance.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 310 | 0.015 max | 2.0 max | 0.15 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 | 2.0 max | 1.00 max | 0.045 max | 0.030 max | 24.00 – 26.00 | 0.75 max | 19.00 – 21.00 | 53.095 min |
The mechanical properties such as tensile strength, yield strength, and elongation. These values help assess the flange’s performance under pressure and temperature conditions.
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.9 g/cm3 | 1402 °C (2555 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
The standard size ranges and key dimensions for Stainless Steel 310/310S flanges, including inner and outer diameters, bolt circle diameter, and thickness. These measurements help ensure the flange fits correctly with pipes and other components.
| NPS (in.) | 310 Stainless Steel Flange Dimensions | ||||
|---|---|---|---|---|---|
| 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 |
The material and technical standards applicable to SS 310/310S flanges. It includes specifications like ASTM A182 and UNS numbers.
| ASME Flanges | ANSI Flanges | ASTM Flanges | AWWA Flanges |
| MSS Flanges | DIN Flanges | EN Flanges | ISO Flanges |
| JIS Flanges | GOST Flanges | UNI Flanges | API Flanges |
This defines the pressure classes (like Class 150, 300, 600, etc.) that the flanges can handle under specific temperature ranges.
| ASME | Pressure Temperature Ratings For Stainless Steel 310 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 |
Stainless Steel Flanges Grades We Offer
Manufacturing Process of Stainless Steel 310/310S Flanges
Midland Alloys Inc. is one of the leading manufacturers of Stainless Steel 310/310L Flanges, offering custom sizes and competitive pricing. To ensure that every flange meets international quality requirements, we use advanced procedures. We start by selecting high-grade, stainless steel with the right chemical composition. The material is precisely cut using CNC equipment, and automated saws. Next, it is heated to the proper temperature for formation. Depending on the kind, we shape the flange through forging, rolling, or machining. If welding is needed, we use clean, controlled methods to avoid defects. Heat treatment is followed to improve strength and grain structure. Surface finishing removes scale and gives a smooth, clean look. Throughout the process, our team checks quality at every stage using in-process gauges and visual checks. Final inspection includes size checks, pressure tests, and verifying markings. Each flange leaves our facility only after it passes all testing standards.
Plate
Shear
Press
Inspection
Lathe
Drilling
Cleaning
Flange
Inspection
Analytic
Marking
Packing & Shipping
Stainless Steel 310/310S Flanges Application
Because of their excellent resistance to heat and corrosion, stainless steel 310 and 310S flanges are used in a variety of industries. In the pharmaceutical industry, they help keep systems clean and safe during sterile processing. Oil and gas plants rely on them for handling high-pressure steam and harsh chemicals. Power stations and heat exchanger setups use these flanges because they stay strong under high temperatures. In chemical and petrochemical plants, they hold up against acids, solvents, and other corrosive fluids. The food and beverage industry uses it for sanitary piping that’s easy to clean and resists rust. HVAC units and industrial plumbing systems use 310/310S flanges to manage hot air, water, and steam without leaks or failures. Their strength, weldability and long service life make them a solid choice wherever durability and safety matter.
Our Packing Standards
We pack Stainless Steel 310/310S flanges using strong, export-grade materials to keep them safe during handling and transit. We use techniques including shrink wrap, HDPE wrapping, and end cap packaging. We secure them in strong wooden crates for heavier loads. We follow customer instructions or meet international standards like GCC or European norms. Every package includes clear labels with grade, size, standards, and heat numbers for easy tracking. We manage both local deliveries by road or rail and global shipments by air or sea. We handle everything with ease, whether it’s a project-based supply, an urgent delivery, or a large bulk order. Custom orders have lead times, but in-stock items are shipped the same day. You’ll get all the needed documents such as invoice, packing list, test certificates, and export papers, ready with your shipment.
Why Choose Midland Alloys Inc.
As a top manufacturer and supplier, we understand what quality is and how to deliver it. We offer Stainless Steel 310/310S flanges in custom sizes and specs to fit your needsOur prices are affordable, and our service stays strong, no matter the location. With a global supply network and fast delivery, we reach projects across industries without delay. Our advanced manufacturing units follow strict quality checks and meet international standards. We offer every order with certifications like ISO 9001 and test reports you can trust. From one piece to bulk supply, we treat every order with care.
FAQ
Yes, because of their austenitic structure, and lower carbon content SS 310 and 310S flanges provide outstanding weldability and are appropriate for fabrication procedures like forming and machining.
The carbon content is the primary difference because it contains less carbon than SS 310, SS 310S is more resistant to sensitization and is therefore more suitable for high-temperature welding applications.
The ASME standard commonly used for stainless steel flanges is ASME B16.5, which covers flanges from NPS ½” to 24” for pressure-temperature ratings, dimensions, tolerances, and materials.
