A puddle flange is a simple yet essential fitting used in civil construction to prevent water leakage where pipes pass through concrete structures. In RCC (Reinforced Cement Concrete) slabs, these flanges act as a seal that stops water from migrating along the outer surface of a pipe. Whether you are working on water tanks, basements, lift pits, or underground pipelines, installing a puddle flange correctly ensures waterproofing and structural durability. This step-by-step guide from Udhhyog , a leading supplier of GI, MS, and SS puddle flanges in India, explains how to use a puddle flange during RCC slab construction. 🧰 Step-by-Step Guide ✅ Step 1: Choose the Right Puddle Flange Select a puddle flange based on the pipe size and material (MS, GI, or SS). GI puddle flanges are ideal for general drainage and water pipes. Use stainless steel for corrosive environments or coastal zones. At Udhhyog , we provide puddle flanges in custom sizes with...
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Guide to Puddle Flange Selection for Civil & Industrial Udyog Applications
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Explore the ultimate guide to puddle flange selection for civil and industrial Udyog applications. Learn about MS, GI, SS types, use cases, pricing, and expert tips for leak-proof installations.
Introduction: Importance of the Right Puddle Flange
In civil construction and industrial Udhhyog (उद्योग) projects, ensuring water-tight pipe penetrations through concrete is vital. This is where puddle flanges play a key role. Whether you’re dealing with water tanks, STP plants, pump houses, or drainage lines, choosing the right flange ensures leak-proof joints, longevity, and structural integrity.
What is a Puddle Flange in Udyog Use?
A puddle flange is a sealing device used on pipes that pass through concrete walls or slabs. It prevents water or chemical leakage by anchoring the pipe to the concrete with a wide collar that blocks seepage.
✅ Key Features
Prevents water ingress
Ensures long-term sealing
Anchors pipe inside RCC
Corrosion-resistant (if properly coated or made of SS/GI)
Applications in Civil & Industrial Udyog Sectors
Sector
Use Case
Civil Construction
Basement waterproofing, OHT tank piping, underground drainage
Water Supply Projects
RCC water tanks, municipal pipelines
Industrial Udyog
STP/ETP plants, cooling water lines, pump houses
Power Plants
Fire water lines, oil/water separation chambers
Chemical Industries
Acid-resistant connections through concrete
Types of Puddle Flanges for Udyog Projects
Type
Description
Best For
MS (Mild Steel)
Affordable, must be coated
General civil use
GI (Galvanized Iron)
Zinc-coated, corrosion-resistant
Underground pipes, tanks
SS 304/316
Rust-proof, long-lasting
Chemical, STP, marine environments
PVC/UPVC
Lightweight, non-metallic
Residential, plumbing walls
How to Choose the Right Puddle Flange
1. Define the Application Type
Drainage and STP/ETP Udyog → Go for SS 316
Water tanks and civil RCC structures → Choose GI or coated MS
Chemical or Coastal Industry → Use SS 316L for best protection
2. Consider the Media Flowing Through Pipe
For normal water: GI or MS (coated) is sufficient
For chemicals or sewage: SS is mandatory
3. Corrosion Resistance Requirement
MS needs anti-rust treatment (red oxide, bitumen, epoxy)
GI has built-in zinc protection
SS is ideal for longevity
4. Pipe Diameter & Pressure
Choose puddle flanges that match the pipe OD and can handle system pressure (check wall thickness too).
Civil vs Industrial Puddle Flange Needs – At a Glance
Factor
Civil Projects
Industrial Udyog
Cost Priority
High
Medium
Durability Required
Moderate
High
Corrosion Exposure
Medium
High
Common Choice
GI or MS
SS or GI
Size Range
2" to 12"
4" to 24" or custom
Price Chart – Puddle Flange for Udyog Applications (2025 India)
Size
MS (₹)
GI (₹)
SS 304 (₹)
SS 316 (₹)
2 inch
140–180
180–250
450–600
650–850
4 inch
220–300
300–400
700–1000
950–1200
6 inch
300–450
450–600
1200–1500
1500–2000
8 inch
450–650
650–900
1800–2400
2400–2800
Prices depend on thickness (5mm–12mm), quantity, and coatings.
Top 5 Tips to Select a Flange for Udyog Needs
✅ Use SS flanges for chemical plants and STPs
✅ Prefer ribbed or grooved designs for stronger RCC anchorage
✅ Always match flange to pipe OD and wall thickness
✅ Apply bitumen or epoxy coating to MS puddle flanges
✅ Buy from reliable manufacturers with MTC and ISO certifications
FAQs – Puddle Flanges for Civil & Udyog Use
Q1. What size puddle flange is used in STP industrial plants?
Typically 4” to 12” SS 316 flanges are used in STPs for corrosion resistance.
Q2. Can MS flanges be used underground in civil construction?
Yes, but must be epoxy-coated or bitumen-painted to resist rust.
Q3. Is GI flange good for RCC water tanks?
Yes. GI flanges are ideal for underground and overhead water tank penetrations.
Q4. What is the lifespan of a puddle flange?
MS: 5–10 years (with coating)
GI: 10–15 years
SS 316: 20+ years
Q5. Where can I buy puddle flanges for Udyog use?
Buy from India-based manufacturers in Delhi, Ahmedabad, Mumbai, Coimbatore, or Ludhiana who cater to industrial and government civil projects.
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