Elbow 25mm 45* RAKtherm PPRc

Description

Elbow 25mm 45*

 

RAKtherm imported PPRc, Food graded third generation Poly propylene Random with Co-polymer
materials. contact 0322-3540656

 

 

What is Elbow 25mm 45* RAKtherm PPRc ?

 

The 25mm 45° RAKtherm PPRc Elbow PN 25 is a polypropylene random copolymer (PPR/PPRc) pipe fitting used to change the direction of a 25mm PPRc pipeline by 45 degrees. It is particularly useful in hot- and cold-water plumbing, HVAC water piping, and other pressurized fluid-distribution systems. A UAE building-material supplier specifically lists the 25mm 45° RAKtherm elbow as a RAKtherm product.

RAKtherm itself describes its PPR piping systems as suitable for high-pressure warm/cold-water transfer in residential, commercial and industrial applications.

1. Product identification Elbow 25mm 45* RAKtherm PPRc

The 25mm size is the outside diameter of the compatible PPR pipe, rather than a 25mm internal-flow diameter. RAKtherm’s product range includes 45° elbows in multiple diameters.

2. What does PN 25 mean?

PN 25 is the nominal pressure classification of the piping/fitting system. It indicates a nominal pressure class of 25 bar under the applicable rating conditions.

However, 25 bar should not be interpreted as the allowable working pressure at every water temperature. PPR systems are temperature-dependent, so the manufacturer’s pressure/temperature derating and the particular pipe’s SDR/class must be checked for hot-water and HVAC applications.

For example, the fact that a fitting is PN25 does not automatically mean a complete installation can continuously operate at 25 bar at elevated temperature.

3. Why use a 45° elbow?

A 45° elbow changes the pipeline direction more gradually than a 90° elbow.

Typical uses include:

• Changing a pipe route by 45°
• Avoiding structural beams or other services
• Routing hot-water supply and return lines
• HVAC chilled/heating-water pipework
• Connecting pipe runs around corners
• Creating smoother routing with fewer abrupt changes in direction
• Improving hydraulic routing compared with unnecessarily tight bends

For example:

Straight pipe → 45° elbow → straight pipe

This creates a 45° directional change without requiring a sharp 90° turn.

4. Main advantages

PPRc construction

• Corrosion-free compared with conventional metallic pipework
• Resistant to scaling and many chemicals
• Lightweight
• Suitable for concealed installations
• Thermally insulating compared with many metal piping materials
• Heat-fusion joints eliminate conventional threaded joints at the PPR connections

45° configuration

• Provides a smooth directional change
• Useful where space or routing requires an intermediate angle
• Can help avoid excessive directional losses compared with multiple abrupt fittings

RAKtherm identifies its PPR systems for potable-water installations, high-pressure water systems, heating/cooling-related applications and industrial fluid networks.

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5. Installation procedure

Step 1 — Prepare the pipe

Cut the 25mm PPRc pipe squarely using a suitable PPR pipe cutter.

The pipe end should be:

• Straight
• Clean
• Free from dirt
• Free from burrs or damaged material

Step 2 — Check the elbow

Inspect the 45° elbow before welding.

Check:

• Correct size: 25mm
• Correct angle: 45°
• Correct pressure class
• Clean socket
• No cracks or deformation

Step 3 — Mark insertion depth

Mark the required insertion depth on the pipe according to the RAKtherm manufacturer’s installation instructions/tooling specifications.

Do not insert the pipe excessively deep, because this can reduce the effective internal passage.

Step 4 — Heat fusion

Use a suitable PPR socket-fusion/polyfusion welding machine with the correct 25mm heating tools.

The exact heating time, insertion depth and cooling time should follow the RAKtherm installation table for the pipe/fitting combination. Do not rely on a generic heating time if the manufacturer’s instructions specify otherwise.

Step 5 — Heat pipe and fitting

Heat the pipe end and the elbow socket simultaneously using the properly sized fusion dies.

The objective is to soften the PPRc surfaces sufficiently to create a homogeneous fusion joint.

Step 6 — Join

After heating:

1. Remove the pipe and elbow from the heating tool.
2. Immediately push the pipe straight into the elbow socket.
3. Align the elbow at the required 45° orientation.
4. Avoid twisting the joint during insertion.

Step 7 — Cooling

Hold the joint stationary while it cools naturally.

Do not:

• Twist the fitting
• Pull the pipe
• Apply excessive mechanical stress
• Rapidly cool the joint with water unless specifically permitted by the manufacturer’s procedure

Step 8 — Inspect the joint

A properly fused joint should have a continuous fusion bead around the connection without obvious gaps, cracks or misalignment.

Step 9 — Pressure test

After completing the piping system, perform the applicable hydrostatic pressure/leak test according to the project specification, local plumbing requirements and RAKtherm installation instructions.

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6. HVAC application

The 25mm 45° elbow can be useful in HVAC hydronic water circuits, particularly where smaller branch pipes are required.

Typical applications include:

Chilled-water system

• AHU/FCU branch connections
• Small chilled-water branches
• Condenser-water-related piping where the material/system specification permits

Heating-water system

• Radiator circuits
• Heating-water branches
• Hot-water circulation

Building services

• Domestic hot-water distribution
• Cold-water distribution
• Mechanical-room pipe routing

RAKtherm states that its PPR piping systems are intended for warm/cold water and other fluid-transfer applications across residential, commercial and industrial installations.

Important: For HVAC applications, verify that the project’s specified fluid temperature, pressure, glycol/chemical concentration and operating conditions are compatible with the particular RAKtherm PPR system.

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7. Hot- and cold-water plumbing usage

Cold water

The fitting can be used for:

• Main cold-water distribution
• Tank-to-building supply
• Bathroom supply
• Kitchen supply
• Branch lines
• Commercial building water distribution

Hot water

It can be used for:

• Domestic hot-water distribution
• Hot-water branches
• Hot-water return/circulation systems

For hot-water service, the allowable pressure must be derated according to temperature and the manufacturer’s technical data.

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8. Example installation

A typical arrangement could be:

25mm PPRc Pipe → 25mm 45° Elbow → 25mm PPRc Pipe

The elbow redirects the pipe by 45° while maintaining a fully fused PPRc connection.

For a more complicated route:

25mm Pipe → 45° Elbow → Pipe → 45° Elbow → Pipe

Two 45° elbows can therefore create a gradual change in routing rather than using a single sharp 90° turn.

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9. Technical advantages vs. conventional metal elbow

10. Standards and documentation

For procurement or project submittal, don’t rely solely on a generic online description. Ask the supplier/manufacturer for the current RAKtherm technical catalogue, product datasheet and pressure-temperature ratings for the exact PN25 fitting. RAKtherm provides catalogues and technical documentation through its official site.