Puddle Flange Dimensions, Types & IS Standards – Detailed Chart by Udhhyog

 

When it comes to constructing leak-proof concrete structures, puddle flanges are a must-have component—especially where pipes pass through RCC walls, slabs, and tanks. At Udhhyog, we provide a complete range of puddle flanges that meet Indian Standards (IS 1538) and are suitable for a wide array of industrial, municipal, and residential applications.

Whether you need flanges for sewage systems, stormwater drains, manholes, or basement waterproofing, this guide will help you understand the dimensions, types, and material options available.

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🛠️ What Is a Puddle Flange?

A puddle flange is a circular plate or ring welded or fitted around a pipe that penetrates a concrete structure. It is embedded into the concrete to prevent water seepage along the pipe’s surface.

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🔍 Types of Puddle Flanges Offered by Udhhyog

Type	Material	Best Use Case
Plain Puddle Flange	MS / GI / SS	Basic RCC structures and sumps
Puddle Flange with Collar	MS / GI / SS	Higher grip in concrete, high-pressure areas
Slotted/Grooved Flange	SS / GI	Chemical tanks, stormwater drains
Custom-Profile Flange	As per design	Special utility tunnels or ducts

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📐 Standard Puddle Flange Dimensions (IS 1538 Reference)

Below is a chart of commonly used sizes available at Udhhyog. Custom sizes can also be manufactured on request.

Pipe Size (NB)	Outer Diameter (OD)	Flange Thickness (mm)	Number of Bolt Holes	Bolt Hole Diameter	Collar Height (optional)
50 mm	165 mm	10 mm	4	16 mm	25 mm
80 mm	200 mm	12 mm	4	18 mm	30 mm
100 mm	220 mm	12 mm	4	18 mm	35 mm
150 mm	285 mm	14 mm	8	19 mm	40 mm
200 mm	340 mm	16 mm	8	19 mm	40 mm
250 mm	395 mm	18 mm	12	22 mm	50 mm
300 mm	445 mm	20 mm	12	22 mm	50 mm
400 mm	565 mm	22 mm	16	25 mm	60 mm
500 mm	670 mm	25 mm	20	26 mm	65 mm
600 mm	780 mm	28 mm	20	26 mm	70 mm

🛠️ Note: Dimensions can be adjusted as per customer drawings or project specifications.

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🔒 Udhhyog Quality Commitment

• ✅ Manufactured as per IS 1538 and client-specific standards

• ✅ Materials: MS, GI, SS 304, SS 316

• ✅ Zinc-coated, epoxy painted, or bare finish available

• ✅ CNC-cut and hole-drilled for dimensional accuracy

• ✅ Available with collar, grooved face, or gasket seats

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📦 Where Are Udhhyog Puddle Flanges Used?

• Sewage Treatment Plants (STPs)

• Rainwater & Stormwater Drainage

• RCC Water Tanks & Underground Sumps

• Basements & Utility Conduits

• Inspection Pits & Manholes

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❓ FAQs – Puddle Flange Dimensions & Selection

Q1: How do I choose the right puddle flange size?
A: Match your pipe’s NB (Nominal Bore) to the flange size in the chart. Also consider pressure rating, installation depth, and corrosion exposure.

Q2: Are your flanges suitable for HDPE or PVC pipes?
A: Yes. Udhhyog flanges are designed to accommodate metal and plastic pipes with custom-fitting options.

Q3: Do you supply project-specific flange drawings?
A: Absolutely. We offer 2D CAD drawings and technical support for civil consultants and contractors.

Q4: How do I install a puddle flange properly?
A: Weld the flange to the pipe, ensure proper alignment, embed it during concreting, and conduct a leak test after curing.