Cross Bend 20mm EG PPRc

Description

Cross Bend 20mm 

 

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What is Cross Bend 20mm EG PPRc ?

 

The Cross Bend 20mm EG PPRc PN 25 is a specialized high-pressure plumbing fitting used primarily to allow one pipeline to cross over another without increasing the depth of the installation. In many regions, the “EG” designation often refers to Euro-Green or a similar high-standard grade of Polypropylene Random Copolymer (PPRc).

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1. Description and Purpose

A Cross Bend (also known as a Bridge Bend or Crossover) is an offset fitting. In a typical PPRc installation—where pipes are heat-fused and rigid—you cannot simply “bend” one pipe over another when their paths intersect.

• The “Cross” Factor: It provides a pre-molded “bridge” so that a vertical pipe can pass over a horizontal pipe (or vice versa) while keeping both lines flush against the wall or within a narrow trench.

• EG (Euro-Green): This indicates the material grade and color, following European standards for high-density, food-grade polypropylene.

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2. Technical Specifications

The PN 25 rating is the most critical part of this specification, as it indicates a much higher pressure tolerance than standard domestic fittings (usually PN 16 or PN 20).

Feature	Specification
Material	Polypropylene Random Copolymer (PPRc)
Diameter	20mm (Standard for branch lines)
Pressure Rating	PN 25 (Capable of withstanding 25 Bar or approx. 362 PSI)
Standard	DIN 8077 / 8078 (German Industrial Standards)
Temperature	Suitable for -20°C to +95°C
Joint Type	Socket Fusion (Heat Welding)

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3. Usage & Applications

Due to its high PN 25 rating, this fitting is not just for basic home plumbing; it is designed for demanding environments:

• HVAC Systems: Used in chilled water lines and boiler loops where pressure surges and temperature fluctuations are common.

• Hot & Cold Water Supply: Ideal for high-rise buildings where the static water pressure is high.

• Industrial Fluids: Used in compressed air systems or chemical transport due to its corrosion resistance.

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4. Installation Steps

PPRc fittings are joined through Socket Fusion, which creates a homogenous plastic bond that is stronger than the pipe itself.

1. Preparation: Cut the 20mm pipe squarely and ensure the ends are clean and dry.

2. Heating: Use a PPRc welding machine with 20mm dies. Set the temperature to 260°C.

3. Fusing: Push both the pipe and the Cross Bend onto the heating dies simultaneously.

   • Heating Time: For 20mm, hold for approximately 5 seconds.

4. Joining: Pull them off the machine and push the pipe into the fitting socket immediately without twisting.

5. Cooling: Hold the joint steady for about 4-6 seconds to let the plastic set. Do not pressure test for at least 30 minutes.

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5. Key Advantages

• Space Saving: Eliminates the need for multiple 90-degree elbows to create a manual bridge, which saves space and reduces friction loss.

• Leak-Proof: Fewer joints mean fewer potential leak points.

• Chemical Resistance: It will not rust or scale, ensuring the water remains clean for decades.