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Carbon Steel Flanges

Stainless Steel Seamless Pipes
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Carbon Steel Flanges | CS Flanges Manufacturer, Supplier & Exporter in India:

STAINLESS INDIA is a prominent manufacturer, stockist, and global exporter of Carbon Steel Flanges based in India. We focus on providing high-strength, durable, and pressure-resistant CS flanges that are ideal for applications in oil & gas, petrochemical industries, power plants, refineries, boilers, fabrication, and industrial piping systems.

We produce a comprehensive range of Weld Neck, Blind, Slip-On, Socket Weld, Threaded, Lap Joint, and Orifice Carbon Steel Flanges, all manufactured in accordance with ASTM, ASME, API, DIN, BS, and EN international standards.
Our flanges are offered in material grades such as A105, A350 LF2, A694 F42–F70, IS 2062, and ASTM A516 Gr. 60/70.
Our products meet international standards including ASME B16.5, B16.47, DIN, EN 1092-1, and BS 4504, ensuring both compatibility and durability for critical pipeline systems.

Product Range

Types of Carbon Steel Flanges We Manufacture

Weld Neck Flange (WNRF)
Slip-On Flange (SORF)
Blind Flange (BLRF)
Socket Weld Flange (SWRF)
Threaded / Screwed Flange
Lap Joint Flange
Orifice Flange
RTJ / Plate / Flat Flanges
Custom CNC-Machined Flanges
Technical Data

Grades & Specifications

Material Grade Application / Description
ASTM A105 For ambient / high-temp service
ASTM A350 LF2 For low-temperature service (LTCS)
ASTM A694 F42 / F52 / F60 / F65 / F70 – High-strength for oil & gas pipelines
IS 2062 Carbon Steel General engineering applications
Dimensions
  • Size Range: ½” to 72” (15mm to 1800mm)
  • Pressure Class: 150#, 300#, 600#, 900#, 1500#, 2500#
Config
  • Face Type: RF (Raised Face), FF (Flat Face), RTJ
  • Connection: Welded / Threaded / Bolted
Surface & Mfg
  • Coating: Black Paint, Anti-rust Oil, Galvanized, PTFE Coated
  • Mfg: Forged / CNC Machined / Custom-Built
Certifications
  • EN 10204 3.1 / 3.2
  • IBR & ISO Certified
  • PED Compliant

Applications

Oil & Gas Transmission
Petrochemical & Chemical Plants
Power Generation (Thermal, Nuclear)
Marine & Shipbuilding
Fertilizer & Pharmaceutical
Boiler Connections & Heat Exchangers
Construction & Structural Eng.
Water Treatment Plants

Standards & Certifications

  • ASTM Standards A105 / A350 LF2 / A694 F42–F70
  • ASME B16.5 Sizes ½” to 24”
  • ASME B16.47 Sizes 26” to 60” (Series A/B)
  • International Stds EN 1092-1, DIN, BS 4504, JIS
Our Advantage

Why Choose STAINLESS INDIA for CS Flanges?

20+ Years Exp.

Over 20 years of manufacturing experience. ISO 9001:2015 Certified.

CNC Precision

Precision CNC-Machined flanges with perfect bore tolerance.

Rigorous Testing

In-house testing: Hydro, PMI, UT, and Radiography.

Global Export

Exporting to 70+ countries including UAE, USA, Europe, & Asia.

Fully Compliant

Compliant with ANSI, API, DIN, BS, JIS standards.

Custom Solutions

Customized sizes, coatings, and markings available.

Secure Packing

Fumigated wooden box export packaging.

Fast Delivery

Large ready stock, short lead times, and just-in-time delivery.

Frequently Asked Questions – Carbon Steel Flanges

A105 refers to a specification for carbon steel forged flanges utilized in piping systems designed for both ambient and elevated temperature applications in pressure systems.

Indeed. We supply flanges that are certified by IBR, accompanied by Form III C as mandated by the Indian Boiler Regulations.

Certainly. We produce flanges according to specific drawings, dimensions, or pressure ratings provided by our clients.

Yes. We facilitate TPI through reputable agencies such as SGS, BV, TUV, and Lloyds.

Type of Carbon Steel Flanges Available

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Global Export Network

We export to more than 70+ countries:

USA • UK • Germany • Italy • UAE • Saudi Arabia • Qatar • Oman • Kuwait • Singapore • Malaysia • Indonesia • Australia • South Africa • Brazil • Mexico • India

All Shipments Include:
  • Packing List
  • Invoice
  • MTC 3.1 / 3.2
  • Third-Party Inspection (TUV/LR/BV) if required
  • Heat Number Traceability

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