Mild Steel (MS) flanges are essential in industrial piping systems, offering strength, durability, and reliability. They are widely used in oil & gas, water treatment, power plants, and construction for connecting pipes, valves, and other equipment.
This guide covers:
MS flange dimensions and standard sizes
Types of MS flanges and their applications
MS flange price list for 2", 3", 4", 6", and 150mm sizes
MS flange specification as per IS 1538 and Class 150
MS flange weight chart and standard table
MS Flange Dimensions & Size Chart
MS flanges are manufactured following IS 1538, ANSI, and PN16 standards. Below is a standard size chart.
| Nominal Pipe Size (NPS) | Flange Diameter (mm) | Bolt Hole Diameter (mm) | Number of Bolts |
|---|---|---|---|
| 2" | 150 | 19 | 4 |
| 3" | 175 | 19 | 4 |
| 4" | 230 | 19 | 8 |
| 6" | 280 | 22 | 8 |
| 100mm | 210 | 19 | 8 |
| 150mm | 280 | 22 | 8 |
Types of MS Flanges
MS flanges are categorized based on design, pressure rating, and function.
1. Weld Neck Flange (WN)
High-strength welding connection for high-pressure pipelines.
Used in oil & gas, power plants, and heavy industries.
2. Slip-On Flange (SOF)
Easier to install by slipping over the pipe and welding.
Ideal for low to medium-pressure applications.
3. Blind Flange (BL)
Seals pipe ends for maintenance and pressure testing.
Common in pipeline shutdowns and repairs.
4. Threaded Flange (THF)
Screws onto pipes without welding, suitable for low-pressure applications.
Used in plumbing and small industrial setups.
5. Lap Joint Flange (LJF)
Allows easy alignment and rotation, used with stub ends.
Suitable for systems requiring frequent dismantling.
6. MS Puddle Flange
Used in underground and water-sealing applications.
Prevents water leakage in pipe penetrations.
MS Flange Class 150 & PN16 Specifications
Class 150 Flanges: Designed for 150 PSI pressure rating, used in low-pressure industrial pipelines.
PN16 Flanges: Rated for 16 bar (1600 kPa) pressure, commonly used in water distribution networks.
MS Flange Price List (Approximate Rates in INR)
Prices vary based on size, material quality, and manufacturer. Below is a general pricing guide.
| Flange Size | Class | Price (INR/Piece) |
| 2-inch MS Flange | Class 150 | ₹250 – ₹400 |
| 3-inch MS Flange | Class 150 | ₹400 – ₹600 |
| 4-inch MS Flange | Class 150 | ₹600 – ₹900 |
| 6-inch MS Flange | Class 150 | ₹1,000 – ₹1,500 |
| 100mm MS Flange | PN16 | ₹800 – ₹1,200 |
| 150mm MS Flange | PN16 | ₹1,200 – ₹1,800 |
For bulk orders, Udhhyog provides discounted rates.
MS Flange Weight Chart (Approximate in KG)
Weight varies based on size, thickness, and material.
| Flange Size | Weight (kg) |
| 2-inch | 1.5 – 2.5 kg |
| 3-inch | 2.5 – 4.0 kg |
| 4-inch | 3.5 – 5.5 kg |
| 6-inch | 5.5 – 8.0 kg |
| 100mm | 6.0 – 9.0 kg |
| 150mm | 9.0 – 12.0 kg |
MS Flange Standard Table & Chart
MS flanges conform to IS 1538, ASME B16.5, and ANSI standards. Standard tables provide size, bolt hole spacing, and pressure ratings. Download the MS Flange Table Chart PDF from Udhhyog for detailed technical specifications.
Why Choose Udhhyog for MS Flanges?
✅ High-Quality Industrial Flanges – Available in various sizes and pressure ratings.
✅ Custom Fabrication – Flanges tailored to industrial needs.
✅ Competitive Pricing – Affordable rates for bulk and custom orders.
✅ Trusted by Professionals – Serving Delhi, Haryana, UP, and J&K.
For premium MS flanges, trust Udhhyog – your reliable supplier for industrial piping solutions.
Conclusion
MS flanges play a critical role in industrial piping systems, plumbing, and structural applications. Understanding the right dimensions, types, and price points ensures the best selection for durability and efficiency. Udhhyog provides high-quality MS flanges, from 2-inch to 150mm sizes, Class 150, and PN16 standards.
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