Tuofeng HGD Series Ring Stiffness Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | HGD |
| Price Range | USD 2,800 – 7,000 |
| Instrument Type | Electromechanical Universal Testing Machine |
| Maximum Test Load | 100 kN |
| Force Measurement Range | 0–100 kN (Full Scale) |
| Force Accuracy | ±0.5% of reading |
| Test Stroke | 1000 mm |
| Displacement Resolution | 0.0001 mm |
Overview
The Tuofeng HGD Series Ring Stiffness Testing Machine is a microcomputer-controlled electromechanical universal testing system engineered specifically for the standardized determination of ring stiffness in thermoplastic pipes and tubular structural components. It operates on the principle of axial compression loading applied to a pipe segment supported on two parallel knife edges, per the deformation-based methodology defined in ISO 13968 and GB/T 9647–2003. The machine delivers high reproducibility in measuring the load-deflection relationship under controlled displacement rates, enabling calculation of ring stiffness (kN/m²) as a critical mechanical performance index for drainage, sewerage, and conduit applications. Its rigid frame architecture, precision-ground ball-screw actuation, and closed-loop servo control ensure minimal compliance error and long-term stability—essential for accredited laboratories conducting routine quality control or third-party certification testing.
Key Features
- High-rigidity dual-column frame with reinforced base and crosshead, optimized for low deflection during 100 kN static loading
- AC servo motor coupled with planetary gear reducer and preloaded precision ball screw (C5 grade), delivering smooth, backlash-free motion across full stroke
- Full-scale force transducer with digital signal conditioning; calibrated traceable to national metrological standards (CNAS-accredited calibration optional)
- Real-time data acquisition at up to 100 Hz sampling rate, synchronized with displacement and time stamps
- Integrated safety interlocks including overload cutoff, emergency stop circuit, and mechanical limit switches
- Modular fixture interface supporting rapid exchange of standard knife-edge supports (per GB/T 9647), flat platens, and custom adapters for non-standard geometries
Sample Compatibility & Compliance
The HGD series accommodates pipe specimens with outer diameters ranging from 110 mm to 2000 mm (with optional extended support fixtures). It complies fully with GB/T 9647–2003, ISO 13968:2016, and ASTM D2412–22 for ring stiffness evaluation. Additional configurations enable conformance with ISO 1133–1 (melt flow rate auxiliary testing), ISO 6892–1 (tensile properties of plastics), and ISO 75–1 (heat deflection temperature), subject to fixture and software module selection. All test procedures support GLP-compliant documentation workflows, including electronic signature capability and audit-trail-enabled parameter logging—aligned with FDA 21 CFR Part 11 requirements when deployed in regulated environments.
Software & Data Management
The embedded Windows-based control and analysis software provides intuitive test setup, real-time curve visualization (load vs. displacement, stress vs. strain), and automated report generation in PDF/Excel formats. Each test record includes metadata such as operator ID, environmental conditions (optional sensor integration), calibration status, and raw time-series data export (CSV). Version-locked firmware ensures deterministic behavior across instrument lifecycles. Data integrity safeguards include write-once storage mode, encrypted database backups, and configurable user access levels (administrator, technician, viewer). Optional LIMS connectivity via TCP/IP or OPC UA enables seamless integration into centralized laboratory informatics platforms.
Applications
This system serves as a core mechanical characterization platform across multiple industrial sectors: municipal infrastructure (HDPE, PVC-U, PP-R pipe certification), building materials (corrugated ducts, culvert liners), automotive (fluid transport tubing), and packaging (rigid plastic containers). Beyond ring stiffness, it supports tensile testing of polymer films, compression testing of foam cores, flexural modulus measurement of composite panels, and peel adhesion assessment of laminated structures—when equipped with appropriate grips and software modules. Its adaptability makes it suitable for both R&D validation and production-line QA/QC in ISO 9001-certified facilities.
FAQ
What standards does the HGD series officially comply with?
It meets GB/T 9647–2003, ISO 13968:2016, and ASTM D2412–22 for ring stiffness testing. Optional firmware upgrades extend support to ISO 6892–1 and ISO 75–1.
Can the system be integrated into an existing LIMS or MES environment?
Yes—via standard TCP/IP communication protocols and optional OPC UA server module for bidirectional data exchange.
Is calibration traceability provided with delivery?
A factory calibration certificate traceable to CNAS-accredited reference standards is included; on-site recalibration services are available globally.
What is the typical lead time for custom fixture development?
Standard knife-edge fixtures ship with the system; bespoke tooling (e.g., large-diameter cradles, multi-point support arrays) typically requires 3–5 weeks after final design approval.
Does the software support multi-language UI and regulatory reporting templates?
English and Chinese UI are standard; additional languages (German, Spanish, French) and preconfigured 21 CFR Part 11 report templates are available as licensed options.
