Testing machine standards: Electronic Universal Testing Machine GB/T 16491-1996;

Compliant test method standards:

GB/T9647-2003 "Determination of Torsional Rigidity for Thermoplastic Plastic Pipe Materials"

GB/T19472.1-2004 "Buried Polyethylene (PE) Structural Wall Pipeline Systems Part 1: Polyethylene Double-wall Corrugated Pipe Materials"

GB/T19472.2-2004 "Buried Polyethylene (PE) Structural Wall Pipeline Systems Part 2: Polyethylene Double-wall Corrugated Pipe Materials"

GB/T16800-1997 "Drainage Core Foamed Hard Polyvinyl Chloride (PVC-U) Pipe Materials"

GB/T18477-2001 "Buried Drainage Hard Polyvinyl Chloride (PVC-U) Double-wall Corrugated Pipe Materials"

GB/T21238-2008 "Glass Fiber Reinforced Plastics (FRP) Sand-wrapped Pipes"

GB/T 165-2002 "High-Density Polyethylene (HDPE) Winding Wall Structural Pipe Materials"

GB/T 838-1998 "Glass Fiber Winding Reinforced Thermosetting Resin Sand-wrapped Pressure Pipes"

Standards such as GB/T16491, GB/T5836, etc.

The Torsional Rigidity Testing Machine is a device specifically used to determine the torsional rigidity of thermoplastic plastic pipes and fiber-reinforced plastic (FRP) pipes with a circular cross-section. It is widely used for testing the torsional rigidity, torsional flexibility, flattening, bending, and seam tensile tests of pipe materials such as PE double-wall corrugated pipes and spiral wound pipes. The Torsional Rigidity Testing Machine has various functions, such as key-controlled speed adjustment, digital display of test force and displacement, peak value holding, automatic stop upon failure, and automatic protection against overload and overcurrent.

The principle of the Torsional Rigidity Testing Machine is to determine the torsional rigidity by measuring the force value and deformation value of the pipe material during constant speed deformation. Its technical parameters include maximum load, measurement accuracy, and speed range. For example, the maximum load can reach 50kN, the measurement accuracy is ±1%, and the speed range is between 1mm/min and 500mm/min.

The basic configuration of the Torsional Rigidity Testing Machine typically includes the main unit, motor and servo system, synchronous circular gear reduction system, testing machine measurement and control system, computer, printer, and professional testing software, etc. In addition, the Torsional Rigidity Testing Machine also has all the functions of an electronic universal testing machine and can be equipped with various fixtures for tensile, compression, bending, and shear tests of various materials.

When selecting a Torsional Rigidity Testing Machine, consider its high rigidity frame, servo system, sensor, internal diameter measurement system, software functionality, and safety protection features. For example, it may use a gantry-type high rigidity frame structure, closed-loop AC servo maintenance-free control system, multiple force value sensor bridging structure, self-developed pull-line internal diameter measurement system, and PC control software to ensure the accuracy and stability of the test.