MS Puddle Flange Specification – Thickness, Coating & IS Code
MS Puddle Flange Specification – Thickness, Coating & IS Code
MS puddle flanges are fabricated steel rings welded around pipes to prevent water leakage through RCC walls or tanks. Understanding their technical specification is essential for engineers, architects, and project planners involved in drainage, fire safety, and water tank installations.
Key Specifications of MS Puddle Flanges
- Material: Mild Steel (IS 2062 E250 / E350 Grade)
- Outer Diameter (OD): As per project (typically 2x pipe OD)
- Thickness: 5 mm to 20 mm depending on size/class
- Inner Bore: Matches pipe NB or OD
- Welding Type: Butt welded / Fillet welded
- Surface Prep: Shot blasted or ground smooth
- Coating: Bitumen, GI, or Epoxy
Thickness Guidelines by Size
| Nominal Bore (NB) | Outer Diameter (mm) | Recommended Thickness (mm) |
|---|---|---|
| 100 NB | 220 | 8 |
| 150 NB | 285 | 10 |
| 200 NB | 340 | 12 |
| 250 NB | 395 | 12 |
| 300 NB | 445 | 15 |
| 450 NB | 615 | 18 |
| 600 NB | 770 | 20 |
Coating Types & Use Cases
- Bitumen Coating: Suitable for rainwater, underground, or exposed RCC tanks
- GI Coating: Galvanized for moderate corrosion environments
- Epoxy Coating: Recommended for fire tanks, STP/ETP, and aggressive zones
IS Standards Applicable
- IS 2062: Mild Steel Plate Specification
- IS 1239: Steel Tubes and Fittings
- IS 6392: Flange Dimensions (general)
Installation Notes
- Flange should be embedded 100% inside RCC
- Use anti-corrosive primer or waterproof paint before installation
- Ensure proper alignment with pipe sleeve or penetration
- Centering spacers can be used for accuracy during concrete pour
Buy MS Puddle Flanges with Specified Standards
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FAQ – MS Puddle Flange Specification
Q1. What is the standard thickness for a 200 NB MS puddle flange?
Usually 12 mm, but can vary based on structural design and load conditions.
Q2. Is GI coating mandatory?
No, but it's recommended if used in semi-wet or exposed environments.
Q3. Which IS standard defines puddle flanges?
There is no single IS for puddle flanges, but IS 2062 and IS 6392 are commonly followed.
Q4. Can I get a puddle flange with test certificate?
Yes, Udhhyog provides MTC, QA reports, and coating adherence proof on request.
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