CEN/TR 14920 Moving Jet Test Nozzle | Drain and Sewer Pipe Jetting Resistance

CEN/TR 14920 Figure 1 Moving Jet Test Ceramic Nozzle for Testing Jetting Resistance Of Drain And Sewer Pipes

The CEN/TR 14920 Moving Jet Test Nozzle is specifically developed to perform the moving jet test for assessing the jetting resistance of drain and sewer pipes, fittings, and joints. The nozzle moves along the test specimen while ejecting high-pressure water at a controlled pressure, flow rate, and angle, simulating real-world high-pressure cleaning conditions.

This CEN/TR 14920 Moving Jet Test Nozzle enables manufacturers and testing laboratories to evaluate how well drainage and sewerage system components withstand repeated high-pressure water jetting. It is widely used in product development, quality control, and compliance verification for pipes used in municipal drainage, sewage networks, and pipeline rehabilitation projects.

Technical Parameters

Professional Construction & Technical Precision

The CEN/TR 14920 Moving Jet Test Nozzle is manufactured using high-precision ceramic for the orifice and stainless steel for structural components. The ceramic material offers excellent wear resistance under continuous high-pressure water jetting, while the stainless steel parts provide structural stability and corrosion resistance.

The nozzle orifice is machined to a tight tolerance of Φ2.8 mm ± 0.02 mm, which is essential for maintaining consistent jet characteristics. Combined with the specified jet angle (30° ± 1°) and moving speed, this precision construction enables repeatable and reliable evaluation of pipe jetting resistance in accordance with CEN/TR 14920.

Testing Principle

The moving jet test directs a high-pressure water jet from the CEN/TR 14920 Moving Jet Test Nozzle onto the inner surface of a drain or sewer pipe while the nozzle moves at a constant speed. This process simulates the actual conditions that drain and sewer pipes are exposed to during high-pressure cleaning operations in real-world applications.

By precisely controlling pressure (12 MPa), flow rate (46 L/min), jet angle (30°), and moving speed (1 m/min), the CEN/TR 14920 Moving Jet Test Nozzle enables accurate assessment of the pipe’s resistance to surface erosion, damage, and structural degradation caused by repeated high-pressure jetting. This test method provides a standardized approach to evaluate the durability of drain and sewer pipes, fittings, and joints under simulated cleaning conditions.

Common Error Mitigation

To obtain accurate and consistent test results when using the CEN/TR 14920 Moving Jet Test Nozzle, the following practices are recommended:

• Keep the ceramic nozzle orifice clean and free from blockage or wear before each test, as any obstruction can affect the jet characteristics and compromise test accuracy.
• Maintain stable water pressure and flow rate within the specified tolerance throughout the test to ensure the jetting conditions remain consistent with CEN/TR 14920 requirements.
• Verify the correct jet angle and moving speed of the CEN/TR 14920 Moving Jet Test Nozzle as defined in the standard, since deviations may lead to inconsistent or unreliable test outcomes.
• Properly prepare and secure the test pipe specimen to prevent movement during testing, ensuring that the nozzle travels consistently along the intended path.
• Regularly inspect the ceramic nozzle for damage, as even minor wear can affect jet performance and test accuracy over time.

Applications & Use Cases

The CEN/TR 14920 Moving Jet Test Nozzle is used by drain and sewer pipe manufacturers, testing laboratories, certification bodies, and research institutions to evaluate the jetting resistance of drainage and sewerage system components. It supports product development, quality control, and compliance verification for pipes, fittings, and joints used in municipal drainage and sewage networks.

This nozzle helps manufacturers assess the durability of both new pipes and renovation/replacement components under simulated high-pressure cleaning conditions, contributing to improved product reliability and longer service life in real-world applications.