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. ๐งฐ 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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Industrial GI ERW Pipes for Plumbing & Construction – Trusted Udyog Suppliers
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Industrial GI ERW pipes are galvanized electric resistance welded steel pipes used extensively in plumbing and construction due to their corrosion resistance, high strength, and affordability. Trusted Udhhyog (industry) suppliers in India offer these pipes in various sizes, pressure ratings, and zinc coatings for long-lasting performance.
๐️ What Are GI ERW Pipes?
GI ERW Pipes are made by welding mild steel strips using electric resistance welding and then hot-dip galvanized to prevent corrosion. These pipes are widely used in both residential and industrial infrastructure projects, especially where water exposure is frequent.
✅ Key Characteristics:
Material: Mild Steel (MS)
Coating: Hot-Dip Galvanized (Zinc)
Weld Type: Longitudinal Electric Resistance Welded
Usage: Water supply, drainage, structural supports
๐ Standard Size Range & Specifications
Property
Specification
Outer Diameter (OD)
½” to 12”
Thickness
1.2 mm to 6 mm
Length
6 meters (standard) or custom-cut
Zinc Coating
40–120 gsm (can vary)
Standard Compliance
IS 1239 (Part 1), IS 3589, ASTM A53, BS 1387
Ends
Plain End, Beveled End, Threaded with Couplings
๐ง Applications in Plumbing & Construction
๐ฟ Plumbing:
Water distribution systems
Drainage lines
Rainwater harvesting pipelines
Underground and overhead piping
๐ข Construction:
Scaffolding and temporary structures
Structural bracing and framing
Fencing poles and railings
Cable conduit piping
๐ญ Udyog & Industrial Use Cases
Sector
Use of GI ERW Pipes
Manufacturing
Coolant pipelines, compressed air lines
Chemical Plants
Galvanized piping for non-reactive liquid flows
Oil & Gas
Low-pressure distribution lines, casing applications
Power Plants
Support structures, earthing systems
Public Utilities
Urban water supply, sewage discharge systems
๐ธ Price Range in India (2025)
Pipe Size (Inch)
Approx. Price per Meter (INR)
Type
½ inch
₹80 – ₹120
GI ERW Light Class
1 inch
₹120 – ₹180
GI ERW Medium Class
2 inch
₹200 – ₹300
GI ERW Heavy Class
4 inch
₹350 – ₹500
GI ERW Structural
Note: Prices vary by thickness, zinc coating, and quantity.
๐ข Top Trusted GI ERW Pipe Suppliers in India
Supplier Name
Location
Specialty
Jindal Pipes Ltd.
Delhi NCR
Premium GI ERW pipes for construction
Tata Pipes
Pan India
Hot-dip galvanized plumbing pipes
APL Apollo Tubes Ltd.
Ghaziabad, UP
Heavy-duty structural GI ERW pipes
Surya Roshni Ltd.
Haryana
Industrial GI ERW & coated pipes
Zenith Steel
Maharashtra
Export-quality GI ERW plumbing pipes
๐ Backlink Strategy
To improve SEO and lead generation for GI ERW pipe businesses:
Internal Links
Link to “Types of ERW Pipes” or “GI Pipes for Drainage Systems”.
Post case studies on plumbing contractor blogs or Udyog (industrial) directories.
Google My Business Optimization
Add product categories like “GI ERW Plumbing Pipes” with pricing and availability.
FAQs
Q1. Are GI ERW pipes suitable for drinking water lines? Yes, if they comply with IS 1239 and have high-quality galvanizing, they're safe for potable water.
Q2. What is the difference between light, medium, and heavy GI pipes? The classification depends on wall thickness, which affects pressure resistance and weight.
Q3. How long do GI ERW pipes last in outdoor installations? Typically 20–50 years, depending on zinc thickness and environmental exposure.
Q4. Can GI ERW pipes be welded on-site? Yes, but it's recommended to re-coat the weld joints with zinc spray to maintain corrosion resistance.
Introduction GI pipes (Galvanized Iron pipes) are a core component in plumbing, structural, and industrial systems across India. Their zinc coating provides excellent corrosion resistance, making them ideal for water supply lines, irrigation, borewells, fencing, and fabrication. But to ensure proper installation and compatibility, it's crucial to understand the standard GI pipe size chart in mm and inches , as defined by ISI standards (IS:1239 Part 1 and Part 2). This guide provides a comprehensive GI pipe size chart with nominal bore (NB), outside diameter (OD), wall thickness , and equivalent inch-mm conversions , helping buyers, engineers, and plumbers make informed choices. ๐ What is a GI Pipe? A GI pipe is a mild steel pipe that has been galvanized with a layer of zinc. The galvanization process helps prevent rust, thereby extending the pipe's lifespan. These pipes are widely used in: ๐ง Water supply and plumbing ๐ Agricultural irrigation ๐️ Structura...
Looking for the latest GI pipe prices in India for 2025? Whether you're a contractor, builder, or industrial buyer, this guide provides the full GI pipe price list by size (½ inch to 50mm) , covering B Class and C Class pipes from top manufacturers like Jindal and Tata. GI pipe prices in 2025 vary from ₹75 to ₹1,450 per meter, depending on pipe size , class (B/C) , and brand . B Class is commonly used for general water lines, while C Class suits high-pressure applications. ๐งฑ What is a GI Pipe? GI (Galvanized Iron) pipes are mild steel pipes coated with zinc to prevent corrosion. They're widely used in water supply, plumbing, fire-fighting, construction, and industrial Udyog (เคเคฆ्เคฏोเค) sectors. IS Standard: Most GI pipes follow IS:1239 (Part-1) specifications. ๐ GI Pipe Price List by Size (2025) Size (NB) Outer Dia (mm) B Class Price/Mtr (₹) C Class Price/Mtr (₹) ½” (15mm) 21.3 mm ₹75 – ₹90 ₹105 – ₹120 ¾” (20mm) 26.9 mm ₹95 – ₹110 ₹130 – ₹145 1” (25mm) 33.7 mm ₹1...
Galvanized Pipe Price List 2025 – Compare GI Pipe Rates for Construction & Industrial Udhhyog Looking for the latest 2025 galvanized pipe prices in India? This guide lists updated GI pipe rates ideal for construction and Udhhyog (industrial) applications. Explore sizes, weights, and current market rates to make an informed purchase from top dealers and manufacturers. Key Benefits of Galvanized Pipes Rust-Resistant and Durable Long life in harsh environments Cost-effective for water and gas lines Available in various diameters and thicknesses Suitable for Udhhyog, residential, and commercial use Top Applications in 2025 Construction projects (buildings, drainage, scaffolding) Udhhyog use (factories, process plants, warehouses) Plumbing & water supply networks Electrical conduit and fencing Agriculture and irrigation pipelines Galvanized Pipe Price List (2025) Pipe Size (Inch) Nominal Bore (mm) T...
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