How to Use a Puddle Flange in RCC Slab Construction – Step-by-Step Guide

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  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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SS vs GI Puddle Flanges – Which One is Better for Your Project?

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 Introduction: Choosing the Right Puddle Flange Material

Puddle flanges are crucial in ensuring leak-proof pipe penetrations through RCC walls, tanks, or slabs. But when it comes to selecting the right material — SS (Stainless Steel) or GI (Galvanized Iron) — many engineers, contractors, and industrial buyers find themselves unsure.

This guide compares SS vs GI puddle flanges, their strength, durability, corrosion resistance, and ideal applications.

🧱 What Are Puddle Flanges?

A puddle flange is a ring-like device installed around pipes as they pass through concrete to prevent leakage. It's embedded into the RCC structure and forms a seal that blocks water or fluid ingress.

Common Materials:

  • SS (Stainless Steel) – Known for corrosion resistance and durability.

  • GI (Galvanized Iron) – Steel coated with zinc to resist rust at a lower cost.

⚙️ SS vs GI Puddle Flanges – Quick Comparison Table

FeatureSS Puddle FlangeGI Puddle Flange
MaterialStainless Steel (usually SS 304/316)Mild Steel with Zinc Galvanizing
Corrosion ResistanceExcellent (ideal for chemicals/water)Moderate (not suitable for acids)
DurabilityHigh (long-term, 20+ years)Medium (7–10 years approx.)
StrengthHigh mechanical strengthModerate
CostHigherEconomical
WeightLighter (for same strength)Heavier
Best ForChemical plants, STPs, heavy industriesPlumbing, basements, drainage
MaintenanceLow (rust-free)Requires regular inspection
AestheticShiny, smooth finishDull, coated metal look

πŸ”© Detailed Breakdown of Key Differences

✅ 1. Corrosion Resistance

  • SS Flanges resist corrosion from water, chemicals, and air exposure. Ideal for industrial Udyog, chemical plants, and marine areas.

  • GI Flanges are protected by a zinc coating. Effective in non-aggressive environments, but not suitable for chemical applications.

✅ 2. Life Span

  • SS puddle flanges can last 20+ years with minimal maintenance.

  • GI puddle flanges generally last 7–10 years depending on exposure.

✅ 3. Applications by Sector

Application AreaRecommended Material
Chemical PlantsSS Puddle Flange
Underground DrainageGI Puddle Flange
STP / ETP PlantsSS Puddle Flange
Residential BasementsGI Puddle Flange
RCC Tanks in Industrial UdyogSS Puddle Flange
Parking DrainageGI Puddle Flange

✅ 4. Cost Factor

  • SS puddle flanges cost more but deliver longer service and lower lifecycle cost.

  • GI puddle flanges are affordable upfront, suitable for budget projects.

πŸ’° For cost-sensitive civil projects, GI is sufficient. For industrial and long-term setups, SS is the smart investment.

πŸ’Ό When to Choose SS vs GI?

✅ Choose SS Puddle Flange if:

  • Working in chemical, marine, or aggressive environments

  • Long-term, high-performance sealing is required

  • You need low maintenance systems

  • Installed in sewage/wastewater systems

✅ Choose GI Puddle Flange if:

  • It's a residential or small commercial project

  • Budget is a key factor

  • Environment is non-corrosive

  • Installed in temporary or low-pressure RCC systems

πŸ“¦ SS vs GI Puddle Flange Price in India (2025)

Size (inches)SS Puddle Flange PriceGI Puddle Flange Price
2”₹480 – ₹650₹200 – ₹300
4”₹850 – ₹1,100₹350 – ₹500
6”₹1,400 – ₹1,900₹600 – ₹800
8”₹2,500 – ₹3,200₹950 – ₹1,300

πŸ“Œ Prices vary based on flange thickness, pressure class, and region.

πŸ€” FAQs – SS vs GI Puddle Flanges

Q1. Which puddle flange is rust-proof?
πŸ‘‰ Stainless Steel (SS) is rust-proof and ideal for long-term use in corrosive settings.

Q2. Can I use GI puddle flange in STP tanks?
❌ Not recommended. SS flanges are better for STPs and ETPs due to chemical exposure.

Q3. Is GI a good option for residential drainage?
✅ Yes, GI puddle flanges are sufficient for non-aggressive residential environments.

Q4. What type of flange is best for Udyog pipe systems?
πŸ‘‰ SS puddle flanges offer strength and chemical resistance ideal for industrial use.

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