Loose Puddle Flange

Loose Puddle Flange

Waterproofing plays a crucial role in maintaining the integrity of modern infrastructure. When pipes pass through concrete structures, leakage prevention becomes a priority. This is where loose puddle flanges come into play. Designed to create a water-tight barrier between the pipe and surrounding concrete, they are widely used in plumbing and civil engineering projects.

Mesta Inc., a globally recognized brand, specializes in manufacturing and supplying high-performance loose puddle flanges. With a strong footprint across India, Kazakhstan, UAE, Saudi Arabia, and Uzbekistan, Mesta Inc. supports industries with products that meet international standards.

Loose Puddle Flange

Puddle Flange specification

Size Connect Type Production technique
1/2″ to 48″ Flat Face / Raised Face / RTJ Forged / Heat treated / machined
Coating Pressure Rating Equipment
  • Zinc Plated
  • Oil Black Paint
  • Anti-rust Paint
Class 150 to Class 2500
  • Press machine
  • Bending machine
  • Pushing Machine

Stainless steel puddle flange weight chart

O
D
NPS Sch
10
Sch
30
Sch
20
Sth.
Wall
Sch
60
Sch
120
Extra
Strong
Sch
40
Sch
160
Sch
80
Sch
100
Sch
140
Double
Extra
Strong
0.840 1/2” 0.674 0.622 0.546 0.622 0.464 0.546 0.252
1.050 3/4” 0.884 0.824 0.742 0.824 0.612 0.742 0.434
1.315 1” 1.097 1.049 0.957 1.049 0.815 0.957 0.599
1.660 1.1/4” 1.442 1.380 1.278 1.380 1.160 1.278 0.896
1.900 1.1/2” 1.682 1.610 1.500 1.610 1.338 1.500 1.100
2.375 2” 2.157 2.067 1.939 2.067 1.687 1.939 1.503
2.875 2.1/2” 2.635 2.469 2.323 2.469 2.125 2.323 1.771
3.500 3” 3.260 3.068 2.900 3.068 2.624 2.900 2.300
4.000 3-1/2” 3.760 3.548 3.364 3.548 3.364 2.728
4.500 4” 4.260 4.026 3.624 3.826 4.026 3.438 3.826 3.152
5.563 5” 5.295 5.047 4.563 4.813 5.047 4.313 4.813 4.063
6.625 6” 6.357 6.065 5.501 5.761 6.065 5.187 5.761 4.897
8.625 8” 8.329 8.071 8.125 7.981 7.813 7.187 7.625 7.981 6.813 7.625 7.437 7.001 6.875
10.750 10” 10.420 10.136 10.250 10.020 9.750 9.062 9.750 10.020 8.500 9.562 9.312 8.750 8.750
12.750 12” 12.390 12.090 12.250 12.000 11.626 10.750 11.750 11.938 10.126 11.374 11.062 10.500 10.750
42.000 42” 41.250 41.000

Carbon steel puddle flange pressure rating

Temperature (°C)
Class
Class 600 Class 300 Class 150 Class 900 Class 400 Class 2500 Class 1500
-29 - 38 103.4 51.7 19.8 155 68.9 431 259
50 103.4 51.7 19.5 155 68.9 431 259
100 103.0 51.5 17.7 155 68.7 429 258
150 100.3 50.2 15.8 151 66.8 418 251
200 97.2 48.6 13.8 146 64.8 405 243
250 92.7 46.3 12.1 139 61.7 386 232
300 85.7 42.9 10.2 129 57.0 357 214
325 82.6 41.4 9.3 124 55.0 344 207
350 80.0 40.0 8.4 120 53.4 334 200
375 75.7 37.8 7.4 114 50.4 315 189
400 69.4 34.7 6.5 104 46.3 290 174
425 57.5 28.8 5.5 86.3 38.4 240 144
450 46.0 23.0 4.6 69.0 30.7 192 115
475 34.2 17.1 3.7 51.3 22.8 142 85.4
500 23.2 11.6 2.8 34.7 15.4 96.5 57.9
538 11.8 5.9 1.4 17.7 7.9 49.2 29.5

What Is a Loose Puddle Flange?

A loose puddle flange is a circular device made to fit loosely over a pipe. Unlike fixed flanges, it allows flexibility in positioning before being cast in concrete. The flange creates a seal that prevents water ingress through gaps between the pipe and the concrete slab or wall.

Typically made from durable materials like stainless steel, HDPE, or ductile iron, loose puddle flanges are known for their corrosion resistance and adaptability. Their unique design makes them ideal for installation in both underground and above-ground plumbing systems.

Advantages

Contractors and engineers often prefer loose puddle flanges because of their simple yet effective performance. There are several benefits to incorporating them in construction projects:

  • Flexible Installation – The flange can be adjusted before concrete setting, allowing greater accuracy.

  • Durability – Resistant to chemicals and groundwater, making them perfect for harsh environments like Saudi Arabia and Uzbekistan.

  • Leak Prevention – Effective sealing reduces water damage risk in both dry and humid climates.

  • Cost-Effective Maintenance – Once installed, they rarely require repair or replacement.

Additionally, Mesta Inc. provides customized flange options tailored for extreme weather conditions in Kazakhstan and UAE.

Applications Across Diverse Sectors

From commercial high-rises to residential basements, loose puddle flanges are widely adopted. These are commonly used in:

  • Drainage and sewer systems

  • Water treatment plants

  • Tunnels and metro projects

  • Firefighting pipeline systems

  • Utility corridors passing through concrete walls

In regions like India and the UAE, where monsoons and groundwater levels pose challenges, the use of Mesta Inc.’s loose puddle flanges has proven to enhance long-term structural reliability.

How to Select the Right Loose Puddle Flange

Choosing the appropriate flange depends on multiple factors. Mesta Inc. provides detailed specifications and expert assistance to help clients pick the best fit. Consider the following:

  • Pipe Material Compatibility – Match the flange to the pipe (PVC, HDPE, GI, etc.)

  • Pipe Diameter and Pressure – Select a size based on fluid type and flow pressure

  • Environmental Conditions – Saltwater, chemical exposure, or extreme heat can influence material choice

  • Installation Method – Some projects may require adjustable or reinforced variants

This customized selection approach is particularly useful for infrastructure developments in Uzbekistan and India.

Installation Guidelines 

Though installation is relatively straightforward, following best practices ensures long-term performance. Mesta Inc. emphasizes the importance of precision and planning:

  1. Clean the Pipe Surface – Ensure it’s dust-free for optimal flange placement.

  2. Slide and Position the Flange – As the flange is loose, it can be easily moved to the desired spot.

  3. Secure with Sealant if Needed – For high-pressure areas, additional bonding may be applied.

  4. Concrete Casting – Carefully pour concrete around the flange. Ensure even distribution.

  5. Inspection – Check for alignment, seal integrity, and material exposure.

With guidance from Mesta Inc.’s experts, contractors in Saudi Arabia, Kazakhstan, and UAE report increased efficiency and fewer installation errors.

Maintenance and Lifespan

One of the reasons engineers trust Mesta Inc. is the long-lasting nature of its products. Loose puddle flanges require minimal maintenance if installed correctly. Nonetheless, a few routine checks are encouraged:

  • Inspect for surface corrosion annually

  • Monitor areas with heavy groundwater pressure

  • Replace sealant if degradation occurs

Mesta Inc. offers post-installation support and product replacement warranties across India, UAE, and Kazakhstan, ensuring peace of mind for clients.

Why Mesta Inc. Leads in Loose Puddle Flange Solutions

With years of innovation and manufacturing excellence, Mesta Inc. has become a leader in pipe penetration waterproofing. Their loose puddle flanges are used by top-tier contractors and engineering firms across Saudi Arabia, Uzbekistan, and India.

Key advantages of choosing Mesta Inc. include:

  • ISO-certified products

  • Custom fabrication options

  • Competitive pricing with no compromise on quality

  • Responsive customer support across global markets

The company’s advanced production facilities and research-backed designs help projects meet local and international safety regulations.

Challenges Solved by Loose Puddle Flange Technology

Water seepage through wall or slab penetrations has long plagued builders. Loose puddle flange technology solves several real-world issues:

  • In flood-prone areas, it prevents sudden water intrusion.

  • In arid regions, it handles soil movement and thermal expansion.

  • In industrial settings, it withstands chemical spills and pressurized liquids.

Mesta Inc.’s focus on innovation ensures that clients in UAE and Kazakhstan stay ahead of the curve, addressing these challenges efficiently.

A small yet significant component, the loose puddle flange plays a major role in safeguarding building longevity. Especially in countries like India and Uzbekistan, where varied environmental factors challenge infrastructure, these flanges act as silent protectors.

Thanks to the dedication of Mesta Inc., reliable waterproofing solutions are accessible across continents. By combining product excellence with expert guidance, the company empowers engineers to deliver leak-proof, future-ready structures. Whether it’s a high-rise in UAE, an industrial plant in Kazakhstan, or a metro tunnel in Saudi Arabia, Mesta Inc.’s loose puddle flanges remain a cornerstone of waterproof design.

Get in Touch

Phone Number

+91 22 2386 0222 / +91 22 2386 0223
+91 22 67492118 / +91 22 6636 2118
+919820007728
+919867899897
+919819546861

Email

sales@mestainc.com
nms@mestainc.com
export@mestainc.net

Registered office

Ground Floor, Shop No.2, Rangawala bldg., 58 Islampura Street, Near Alankar Cinema, Mumbai-400 004, India

Factory address

Plot No L 85, MIDC Taloja Industrial Area, Dist.Raigad, Navi Mumbai-410 208, India

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