Why Choose Us as Your Stainless Steel Flange Supplier?
Selecting the right supplier for stainless steel flanges is a strategic decision that impacts
the safety, efficiency, and cost-effectiveness of your operations. CEBEX STEEL INDIA stands
out as a preferred partner due to our unwavering commitment to quality, technical expertise,
and customer satisfaction. We are ISO 9001:2015 and PED certified, reflecting our adherence
to global quality management systems.
Our in-house laboratory is equipped to perform a comprehensive range of mechanical, chemical,
and non-destructive tests, ensuring that every batch of flanges meets or exceeds client
specifications. We maintain full traceability from raw material to finished product, and all
shipments are accompanied by detailed mill test certificates (EN 10204 3.1/3.2), NDT reports,
and compliance documentation.
Our export team is experienced in handling complex logistics, documentation, and packing
requirements, making us a reliable partner for buyers in Africa, the Middle East, Southeast
Asia, and beyond.
Product Overview & Key Features
Our stainless steel flanges are manufactured using premium raw materials sourced from approved
mills, and every stage of production is closely monitored for quality assurance. We offer a
comprehensive range of flange types, sizes, and pressure ratings, suitable for a wide variety
of industrial applications.
| Feature |
Specification / Detail |
| Standards |
ASTM, ASME, EN, DIN, BS, JIS, GOST, ISO |
| Grades |
ASTM A182 F304, F304L, F310, F316, F316L, F321, F347 / F347H |
| Equivalent Grade Names |
SS 304, 304L, 310, 316, 316L, 321, 347 Flanges |
| Pressure Ratings |
Class 150, 300, 600, 900, 1500, 2500; PN6–PN400 |
| Size Range |
½" NB to 48" NB (DN15–DN1200) |
| Surface Finish |
Machined, coated, or as per client specification |
Equivalent Grades of Stainless Steel Flanges
Stainless steel flange materials are manufactured in accordance with various international
standards such as ASTM, EN, DIN, and JIS. The table below provides a reference comparison
of equivalent grades for commonly supplied stainless steel flange materials.
| ASTM / ASME |
EN / DIN |
WNR No. |
JIS |
Common Name |
| ASTM A182 F304 |
X5CrNi18-10 |
1.4301 |
SUS 304 |
Stainless Steel 304 |
| ASTM A182 F304L |
X2CrNi18-9 |
1.4307 |
SUS 304L |
Stainless Steel 304L |
| ASTM A182 F310 |
X15CrNi25-20 |
1.4845 |
SUS 310 |
Stainless Steel 310 |
| ASTM A182 F316 |
X5CrNiMo17-12-2 |
1.4401 |
SUS 316 |
Stainless Steel 316 |
| ASTM A182 F316L |
X2CrNiMo17-12-2 |
1.4404 |
SUS 316L |
Stainless Steel 316L |
| ASTM A182 F321 |
X6CrNiTi18-10 |
1.4541 |
SUS 321 |
Stainless Steel 321 |
| ASTM A182 F347 |
X6CrNiNb18-10 |
1.4550 |
SUS 347 |
Stainless Steel 347 |
Types of Stainless Steel Flanges We Manufacture
Our product portfolio covers the full spectrum of stainless steel flanges, each designed for
specific applications and operating conditions. Weld neck flanges are preferred for
high-pressure systems due to their robust design and ability to withstand extreme temperature
fluctuations. Slip-on flanges offer ease of installation and are widely used in lower-pressure
applications. Blind flanges are essential for sealing off piping systems or pressure vessel
openings, while socket weld and threaded flanges provide reliable connections for smaller
diameter pipes.
We also manufacture lap joint, orifice, spectacle blind, long weld neck, and reducing flanges,
as well as custom flanges based on client drawings and specifications.
Grades, Materials & International Standards
Material selection is a critical factor in flange performance, especially in corrosive or
high-temperature environments. We offer stainless steel flanges in a wide range of grades,
each compliant with relevant international standards.
| Stainless Steel Grade |
Typical Applications |
Standards |
| F304 / F304L |
General industry, water supply, food processing, dairy equipment |
ASTM A182, ASME SA182 |
| F316 / F316L |
Chemical processing, petrochemical, marine, pharmaceuticals, offshore |
ASTM A182, ASME SA182 |
| F321 |
High-temperature services, thermal cycling, exhaust systems, refineries |
ASTM A182, ASME SA182 |
| F347 / F347H |
High-temperature pressure vessels, boilers, heat exchangers, power plants |
ASTM A182, ASME SA182 |
| F310 |
Furnace components, heat treatment equipment, high-temperature piping |
ASTM A182, ASME SA182 |
All materials are sourced from reputed mills and are fully traceable, with heat numbers and
batch records maintained for every order.
Chemical Composition & Mechanical Properties
Every stainless steel flange is supplied with comprehensive test certificates, including
chemical composition and mechanical property reports. Our in-house laboratory conducts
spectrographic analysis, tensile testing, hardness testing, and non-destructive examinations
such as ultrasonic and radiographic testing.
| Grade |
Tensile Strength (MPa) Min |
Yield Strength (MPa) Min |
Elongation (%) Min |
Hardness (HB) Max |
| F304 |
515 |
205 |
30 |
201 |
| F304L |
485 |
170 |
30 |
201 |
| F310 |
515 |
205 |
30 |
217 |
| F316 |
515 |
205 |
30 |
217 |
| F316L |
485 |
170 |
30 |
217 |
| F321 |
515 |
205 |
30 |
217 |
| F347 |
515 |
205 |
30 |
217 |
All test results are documented and provided with each shipment, ensuring transparency
and traceability.
Dimensions, Sizes & Weight Chart
We manufacture stainless steel flanges in a wide range of dimensions, from ½" NB
to 48" NB, with pressure ratings from Class 150 to Class 2500 and PN6 to PN400. Our
production is fully compliant with ASME B16.5, B16.47, EN 1092-1, DIN, and other
international standards. The following table illustrates typical dimensions for weld neck
flanges as per ASME B16.5.
| Size (NB) |
OD (mm) |
Thickness (mm) |
Bolt Circle (mm) |
No. of Bolts |
| ½" |
89 |
11.2 |
60.3 |
4 |
| ¾" |
98 |
12.7 |
69.9 |
4 |
| 1" |
108 |
14.2 |
79.4 |
4 |
| 1½" |
127 |
15.7 |
98.6 |
4 |
| 2" |
152 |
17.5 |
120.7 |
4 |
Custom dimensions and special machining are available upon request.
Applications & Industries Served
Our stainless steel flanges are trusted by leading companies and EPC contractors in a diverse
range of industries. In the oil and gas sector, our products are used in upstream, midstream,
and downstream applications, including pipeline construction, refinery upgrades, and offshore
platforms. Power generation clients rely on our flanges for thermal, nuclear, and renewable
energy projects, where safety and reliability are paramount.
Shipbuilding and marine engineering firms specify our flanges for their corrosion resistance
and mechanical strength, while chemical and petrochemical plants value our ability to supply
exotic alloy flanges for aggressive process environments. We also serve the cement,
construction, water treatment, mining, and food processing industries.
Exporting Stainless Steel Flanges to Africa
As a leading Stainless Steel Flanges Manufacturer in India, we have built a strong reputation
for supplying high-quality flanges to major projects across Africa. Our export team
understands the unique requirements of African industries and ensures smooth, timely
deliveries with complete documentation and compliance. From oil and gas to power and
infrastructure, our flanges are trusted by clients in Nigeria, Egypt, Kenya, South Africa,
Ethiopia and beyond. To learn more about our specialized solutions for the continent, visit our
Africa Stainless Steel Flanges Exporter page.
Related Alloy Flanges – Duplex, Super Duplex, Inconel, Monel, Hastelloy, Titanium, Copper Nickel, Alloy Steel
In addition to Stainless Steel Flanges, we also manufacture and export
Duplex Flanges,
Super Duplex Flanges,
Inconel Flanges,
Hastelloy Flanges, and
Monel Flanges. These high-performance
alloy flanges are engineered for demanding industrial environments requiring superior
corrosion resistance, high mechanical strength, and reliable performance under extreme
temperature and pressure conditions.
Our technical team ensures precise material selection and full compliance with international
standards to meet your project requirements.
Browse our full range:
Why Choose CEBEX STEEL INDIA?
Our clients choose CEBEX STEEL INDIA for our technical expertise, commitment to quality, and
responsive service. We offer direct-from-manufacturer pricing, flexible order quantities,
and comprehensive after-sales support. Our engineering team is available to assist with
material selection, specification review, and custom design.
