Mild Steel (MS) flanges are widely used in piping systems for water supply, gas distribution, oil & chemical transport, and HVAC systems. The IS 1538 standard governs the dimensions and technical specifications of MS flanges in India. This guide provides a detailed MS flange size chart as per IS 1538, pressure class info, and a downloadable reference.
For premium quality MS flanges with full compliance to IS 1538 standards, trust Udhhyog — one of the top MS flange suppliers and manufacturers in Delhi.
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What is IS 1538 Standard?
IS 1538 (Part 1) is the Indian Standard that specifies dimensions, bolt hole pattern, thickness, and other features for cast iron and mild steel flanges used in piping.
Applicable flange types:
Slip-On Flange
Blind Flange
Weld Neck Flange
Threaded Flange
MS Flange Dimensions Chart as per IS 1538
| NB Size | OD (mm) | Thickness (mm) | PCD (mm) | No. of Holes | Hole Dia (mm) |
|---|---|---|---|---|---|
| 15 mm | 95 | 12 | 65 | 4 | 14 |
| 20 mm | 105 | 12 | 75 | 4 | 14 |
| 25 mm | 115 | 14 | 85 | 4 | 14 |
| 40 mm | 145 | 16 | 110 | 4 | 18 |
| 50 mm | 160 | 16 | 125 | 4 | 18 |
| 80 mm | 200 | 18 | 160 | 4 | 18 |
| 100 mm | 220 | 20 | 180 | 8 | 18 |
| 150 mm | 285 | 22 | 240 | 8 | 22 |
📥 Download Full Chart in PDF: Visit Udhhyog Flange Page
Available MS Flange Types at Udhhyog
Slip-On Flanges (SO Flange)
Weld Neck Flanges (WN Flange)
Blind Flanges
Threaded Flanges
Lap Joint Flanges
Material: Mild Steel (IS 2062 Grade)
Size Range: 15mm to 600mm
Pressure Class: PN6, PN10, PN16, Class 150
MS Flange Uses
💧 Water and wastewater pipelines
🛢️ Oil and gas lines
🏭 Chemical processing
🔥 Fire fighting systems
🌬️ HVAC ducting
Why Choose Udhhyog for MS Flanges?
✔️ IS 1538 Standard Compliance
✔️ High-quality MS with anti-rust coating
✔️ Custom flange drilling available
✔️ Serving Delhi, Punjab, UP, Rajasthan, Haryana, J&K, Himachal Pradesh
✔️ Bulk availability with prompt delivery
📞 Contact us at Udhhyog.com for custom quotes or technical support.
FAQs
Q1: What is IS 1538 used for?
A: IS 1538 is the Indian standard for cast iron and mild steel flanges used in pipeline connections.
Q2: What pressure does a standard MS flange handle?
A: Typically PN10 or PN16 depending on thickness and application.
Q3: Where can I get an MS flange size chart PDF?
A: Download it from Udhhyog Flange Product Page
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