HGD-3000C Ring Stiffness Tester

 

 

This instrument is designed for the determination of the ring stiffness of thermoplastic pipes with a circular cross-section. It is also suitable for conducting flattening tests, ring flexibility tests, weld tensile tests, and similar procedures. Compliant with the testing standards for PE double-wall corrugated pipes, spiral-wound pipes, and various other plastic piping materials, it serves as an essential testing instrument for research institutes, quality inspection departments, and pipe manufacturers.

The PC-based control software enables the real-time on-screen display of test force, peak force, crosshead displacement, test deformation, and test curves, offering intuitive and user-friendly operation. The system features overload, overcurrent, and overvoltage protection functions, and is equipped with an internal diameter measurement system capable of accurately measuring changes in the internal diameter of pipe specimens. The transmission system utilizes a distributed control architecture—comprising a PC and a microcontroller—to control a fully digital AC servo motor; this motor drives the moving crosshead vertically at speeds prescribed by relevant testing standards, thereby applying compressive force to the pipe specimen via a compression plate. The force measurement module employs a piecewise linear correction method to ensure the machine's high precision and exceptional stability. This series of ring stiffness testing machines has successfully obtained EU CE product certification.。

 

 

As stipulated in the standard *Determination of Ring Stiffness of Thermoplastic Pipes*, ring stiffness is determined based on the force values ​​and deformation measured while the pipe undergoes deformation at a constant rate. The pipe specimen is positioned horizontally; the compression speed of the parallel plates is determined according to the pipe's diameter, and pressure is applied to the specimen in a vertical direction by two mutually parallel plates. A reaction force is generated during deformation; the ring stiffness is calculated using the force measured when the deformation in the diametral direction of the pipe specimen's cross-section reaches 0.03 *di* (where *di* represents the inner diameter of the pipe specimen).

 

 

 

Complies with the requirements of standards such as GB/T 9647, ISO 9969, and ASTM D2122.

 

Working Conditions:

1. Ambient temperature: within the range of 10°C to 40°C;          

2. Ambient relative humidity: within the range of 30% to 80%;

3. Environment free from vibration and corrosive media;       

4. Correctly installed on a stable foundation and leveled;

5. Free from strong magnetic field interference during operation, and free from strong air convection in the surrounding environment.

 

Ring Stiffness Tester
Max. Test Force	50 kN
Test Force Accuracy	±1% of Indicated Value
Test Force Measurement Range	0 – 50 kN
Test Force Indication Error	Within ±1.0% of Indicated Value
Test Force Resolution	5/10,000 of Maximum Test Force
Relative Displacement Error	±1% of Indicated Value
Crosshead Displacement Resolution	0.001
Crosshead Speed ​​Range	0.1 mm/min – 500 mm/min
Effective Compression Space	3000 mm
Inner Diameter Measurement Range	Φ200 mm – Φ3000 mm
Ring Stiffness Test Width	1100 mm
Power Supply	220 V ±10%, 50 Hz
Mechanical Structure	Gantry Type
Overall Dimensions	1300 (L) × 850 (W) × 3650 (H) mm
Lead Screw	Ball Screw

 

Name	Origin	Qty
Ring Stiffness Fixture	ZNYQ	1set
Pipe Inner Diameter Measurement System	ZNYQ	1set
Servo Speed ​​Control System	Imported	1set
Low-Noise Reducer	Imported	1pc
Ball Screw	Imported	2pcs
Microcomputer and Printer	Lenovo	each1
Testing Software	ZNYQ	1set

 

          HGD-3000C Ring Stiffness Tester  This instrument is designed for the determination of the ring stiffness of thermoplastic pipes with a circular cross-section. It is also suitable for conducting flattening tests, ring flexibility tests, weld tensile tests, and similar procedures. Compliant with the testing standards for PE double-wall corrugated pipes, spiral-wound pipes, and various other plastic piping materials, it serves as an essential testing instrument for research institutes, quality inspection departments, and pipe manufacturers.The PC-based control software enables the real-time on-screen display of test force, peak force, crosshead displacement, test deformation, and test curves, offering intuitive and user-friendly operation. The system features overload, overcurrent, and overvoltage protection functions, and is equipped with an internal diameter measurement system capable of accurately measuring changes in the internal diameter of pipe specimens. The transmission system utilizes a distributed control architecture—comprising a PC and a microcontroller—to control a fully digital AC servo motor; this motor drives the moving crosshead vertically at speeds prescribed by relevant testing standards, thereby applying compressive force to the pipe specimen via a compression plate. The force measurement module employs a piecewise linear correction method to ensure the machine's high precision and exceptional stability. This series of ring stiffness testing machines has successfully obtained EU CE product certification.。  As stipulated in the standard *Determination of Ring Stiffness of Thermoplastic Pipes*, ring stiffness is determined based on the force values ​​and deformation measured while the pipe undergoes deformation at a constant rate. The pipe specimen is positioned horizontally; the compression speed of the parallel plates is determined according to the pipe's diameter, and pressure is applied to the specimen in a vertical direction by two mutually parallel plates. A reaction force is generated during deformation; the ring stiffness is calculated using the force measured when the deformation in the diametral direction of the pipe specimen's cross-section reaches 0.03 *di* (where *di* represents the inner diameter of the pipe specimen).   Complies with the requirements of standards such as GB/T 9647, ISO 9969, and ASTM D2122. Working Conditions:Ambient temperature: within the range of 10°C to 40°C;          2. Ambient relative humidity: within the range of 30% to 80%;3. Environment free from vibration and corrosive media;       4. Correctly installed on a stable foundation and leveled;5. Free from strong magnetic field interference during operation, and free from strong air convection in the surrounding environment. Ring Stiffness TesterMax. Test Force50 kNTest Force Accuracy±1% of Indicated ValueTest Force Measurement Range0 – 50 kNTest Force Indication ErrorWithin ±1.0% of Indicated ValueTest Force Resolution5/10,000 of Maximum Test ForceRelative Displacement Error±1% of Indicated ValueCrosshead Displacement Resolution0.001Crosshead Speed ​​Range0.1 mm/min – 500 mm/minEffective Compression Space3000 mmInner Diameter Measurement RangeΦ200 mm – Φ3000 mmRing Stiffness Test Width1100 mmPower Supply220 V ±10%, 50 HzMechanical StructureGantry TypeOverall Dimensions1300 (L) × 850 (W) × 3650 (H) mmLead ScrewBall Screw NameOriginQtyRing Stiffness FixtureZNYQ1setPipe Inner Diameter Measurement SystemZNYQ1setServo Speed ​​Control SystemImported1setLow-Noise ReducerImported1pcBall ScrewImported2pcsMicrocomputer and PrinterLenovoeach1Testing SoftwareZNYQ1set