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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GI Seamless Pipe Buyers Guide: S&S, Threaded, and NB Options

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Introduction



Choosing the right GI seamless pipe for industrial or infrastructure (Udhhyog) use can be confusing—especially when comparing Socket & Spigot (S&S), threaded, and various Nominal Bore (NB) options. This guide helps buyers understand specs, use cases, pricing, and sourcing in India.



What Is a GI Seamless Pipe?

A GI Seamless Pipe is a hot-dip galvanized iron pipe without any welding seam. This gives it superior strength and pressure capacity—ideal for industrial piping systems, underground utilities, and heavy-duty infrastructure in the Udhhyog sector.

✅ Leak-proof & corrosion-resistant
✅ Long-lasting zinc coating (120–300 GSM)
✅ Conforms to IS:1239 & IS:3589 standards
✅ Ideal for plumbing, waterworks, and oil/gas flow

Types of GI Seamless Pipes in India

TypeDescriptionBest Use Case
S&S (Socket & Spigot)Pipes with bell/socket & spigot end for joiningUnderground water lines, PHE, Jal Jeevan
Threaded EndPipes with external/internal threadsIndustrial plumbing, steam & compressed air
Plain EndPipes without socket/thread endsCustom welding or flanged installations

Nominal Bore (NB) Sizes & Class Grades

NB Size (mm)OD (mm)Class A (Light)Class B (Medium)Class C (Heavy)
15mm21.32.0 mm2.6 mm3.2 mm
25mm33.72.0 mm2.6 mm3.2 mm
40mm48.32.65 mm3.2 mm4.0 mm
80mm88.93.25 mm4.0 mm5.4 mm
100mm114.33.6 mm4.5 mm5.4 mm

GI Seamless Pipe Prices in India (2025)

SizeEnd TypeAvg. Price (Per Meter)Bulk Rate (10+ Tons)
40mm NBThreaded₹190 – ₹230₹170 – ₹195
80mm NBS&S Seamless₹320 – ₹370₹290 – ₹330
100mm NBPlain End₹390 – ₹440₹360 – ₹400

💡 Prices may vary by zinc coating, class type, and dealer margin.

Which Type of GI Seamless Pipe Should You Choose?

✅ S&S Pipes (Socket & Spigot)

  • Easy to join without welding

  • Suitable for underground & rural pipeline systems

  • Common in Jal Jeevan Mission & Smart City Projects

✅ Threaded Pipes

  • Ideal for fast connections in HVAC, gas lines

  • No welding required

  • Best for frequent disassembly or maintenance

✅ Plain End Seamless Pipes

  • Used in custom-cut applications

  • Ideal for pressure vessels, boilers, welding setups

Industrial (Udhhyog) Use Cases

GI seamless pipes are widely used across Indian Udhhyog sectors due to their durability and leak-proof design.

👷 Common Udyog Applications:

  • Fire protection lines (with threaded fittings)

  • Irrigation pipelines

  • Chemical flow systems

  • Air & gas pressure lines

  • Urban sewage and drainage infrastructure

🏢 Government Projects:

  • Jal Jeevan Mission

  • PHE departments

  • CPWD & Smart City upgrades

  • Water treatment plant piping

Best Dealers & Distributors in India

Dealer/BrandLocationCategoryContact
Jindal India Ltd.Hisar, HaryanaManufacturer✓
Surya RoshniDelhi NCRSeamless GI pipe expert✓
Swastik PipesPan IndiaISI-class pipes✓
Prakash SuryaPunjab, HaryanaIndustrial-grade seamless✓

Where to Buy GI Seamless Pipes Online

✅ TradeIndia – Verified Suppliers
✅ IndiaMART – Price Comparison & Quotes
✅ Justdial – Local Dealers & Stock Availability
✅ Amazon Business – For Bulk Procurement

Google My Business (GMB) Optimization for Dealers

  • Add keywords: “GI Seamless Pipe Supplier in [City]”

  • Upload actual stock images and project photos

  • Collect 5-star reviews from contractors and engineers

  • Use GMB posts to share new inventory or price drops

Strong Backlink Strategy

List your brand on:

  • IndiaMART, Justdial, TradeIndia

  • Sulekha B2B, ExportersIndia, UdyogMart

  • Use blog backlinks from:

    • EPC World

    • TheConstructor

    • ConstructionWeek

💡 Submit guest articles like “How GI Seamless Pipes Improve Pressure Systems” to rank better in Udhhyog sectors.

FAQs

Q1. What is the difference between threaded and S&S GI pipes?
Threaded pipes use screw threads for joining, ideal for removable setups. S&S (Socket & Spigot) pipes join through push-fit or cemented sockets, ideal for underground or water lines.

Q2. Are GI seamless pipes better than ERW?
Yes. Seamless pipes offer better pressure tolerance and are free of weld defects, making them suitable for sensitive Udhhyog and infrastructure projects.

Q3. How much does a 40mm NB GI Seamless Pipe cost in India?
In 2025, the price ranges from ₹190–₹230 per meter depending on the pipe class, end type, and zinc coating.

Q4. Where can I buy GI seamless pipes in bulk?
You can buy from verified suppliers on IndiaMART, TradeIndia, Justdial, or visit major brands like Jindal, Surya Roshni, and Swastik Pipes directly.

Q5. What are Class A, B, and C in GI pipes?
They represent pipe thickness:

  • A = Light

  • B = Medium

  • C = Heavy
    Choose based on pressure requirements and pipe life.

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