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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Fire Safe Valves for Hazardous Environments

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Fire safe valves are critical in industries where flammable fluids and gases are present. These valves are designed to maintain integrity and prevent leakage even in case of fire, ensuring system safety and environmental protection in hazardous zones.



Fire safe valves are specialized industrial valves that prevent leakage during and after exposure to fire. Used in hazardous areas like oil, gas, and chemical plants, they comply with API 607/6FA standards and help protect equipment, workers, and the environment from fire-related accidents.


🔧 Features of Fire Safe Valves

  • 🔒 Secondary metal-to-metal sealing for post-fire protection

  • 🔥 Withstand extreme temperatures up to 750°C

  • ✅ API 607 / API 6FA fire-tested

  • 🧯 Prevent leakage of flammable materials

  • 🏭 Used in high-risk industries

🏭 Industries That Need Fire Safe Valves

  1. Oil & Gas Refineries

  2. Chemical Processing Plants

  3. Petrochemical Units

  4. LPG and LNG Storage Facilities

  5. Power Plants (Thermal/Nuclear)

  6. Paint and Coating Manufacturing

🆚 Fire Safe Valve vs Standard Valve

FeatureFire Safe ValveStandard Valve
Fire ResistanceYes (API certified)No
Post-Fire SealingSecondary metal sealPrimary seal only
Suitable for Hazardous?YesNot recommended
CostHigher due to certificationCheaper
ApplicationHigh-risk zonesGeneral industrial use

🔩 Common Types of Fire Safe Valves

  • 🔘 Fire Safe Ball Valves

  • 🔄 Fire Safe Butterfly Valves

  • 🚪 Fire Safe Gate Valves

  • 🛑 Fire Safe Globe Valves

  • 💡 Double Block & Bleed Fire Safe Valves

📍 Fire Safe Valve Standards You Must Know

StandardDescription
API 607Fire test for soft-seated quarter-turn valves
API 6FAFire test for flanged/end connection valves
ISO 10497Fire testing of valves (global standard)

❓ FAQ: People Also Ask

Q1. What is a fire safe valve?

A fire safe valve maintains seal integrity even after fire exposure, preventing flammable fluid leaks in critical systems.

Q2. Where are fire safe valves used?

Used in hazardous environments such as refineries, chemical plants, gas terminals, and LPG filling stations.

Q3. What makes a valve fire safe?

It includes a secondary metal-to-metal seal, so even if soft seats melt during fire, it prevents leakage.

Q4. Are fire safe valves mandatory?

Yes, in many high-risk industries, fire-safe valves are required by law or industry regulations (API 607/6FA).


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