Jiubin JB-300F Single-Wire Vertical Flame Propagation Tester

Overview

The Jiubin JB-300F Single-Wire Vertical Flame Propagation Tester is a precision-engineered apparatus designed to evaluate the flame resistance and self-extinguishing behavior of single insulated wires and cables under controlled vertical orientation. It operates in strict accordance with the fundamental principles of flame propagation testing defined in GB/T 18380.1–2001 and its internationally harmonized counterpart, IEC 60332-1-2. The test method subjects a vertically suspended specimen to a defined propane flame for a specified duration; subsequent observation records whether flame propagation ceases within prescribed time limits and whether flaming particles or droplets fall beyond designated boundaries. This deterministic pass/fail assessment forms a critical component of fire safety certification for low-voltage power, communication, and control cables used in building infrastructure, rail transit, and industrial control systems.

Key Features

• Structurally rigid combustion chamber (300 × 1200 × 450 mm) constructed from non-combustible, heat-resistant materials to maintain dimensional stability and thermal integrity during repeated exposure to open flame.
• Dual-mass-flow meter system enabling independent, calibrated regulation of propane and air supply—ensuring reproducible flame geometry, temperature profile, and impingement angle per IEC 60332-1-2 Annex A requirements.
• Integrated high-voltage piezoelectric igniter and solenoid valve assembly for reliable, repeatable ignition sequence initiation and precise flame-on timing control.
• Manual/auto mode selector switch allows operator flexibility: manual mode supports stepwise procedural verification during method development or training; auto mode executes pre-set timing sequences (flame application duration, post-ignition observation period) with electronic countdown and automatic termination.
• Non-ventilated test environment enclosure minimizes convective interference, preserving laminar flame structure and ensuring compliance with standardized thermal boundary conditions.
• Modular subsystem architecture—including control cabinet, burner assembly, gas delivery manifold, and signal interlock wiring—facilitates field serviceability, calibration traceability, and long-term operational reliability.

Sample Compatibility & Compliance

The JB-300F accommodates cylindrical specimens with outer diameters ranging from 1 mm to 30 mm and fixed lengths of 600 ± 25 mm—covering common conductor cross-sections from 0.5 mm² up to 300 mm² (e.g., PVC-insulated PVC-sheathed, LSZH, PE, and cross-linked polyethylene cables). All mechanical fixtures, clamping mechanisms, and specimen supports are dimensionally referenced to Clause 8 of IEC 60332-1-2 to prevent unintended thermal conduction paths or mechanical stress-induced failure modes. The system meets essential performance criteria for laboratory accreditation under ISO/IEC 17025:2017, including documented uncertainty budgets for flame application timing (±0.5 s), gas flow rate (±2% FS), and specimen positioning tolerance (±1 mm). It supports full audit readiness for GLP-compliant fire testing laboratories and aligns with regulatory expectations for cable qualification under China Compulsory Certification (CCC), UL 1581, and EN 50399 frameworks.

Software & Data Management

While the JB-300F operates via hardwired electro-mechanical controls without embedded firmware, it is fully compatible with external data acquisition systems via TTL-level trigger outputs and relay status signals (flame-on, flame-off, test-complete). Laboratories may integrate the unit into centralized LIMS or ELN platforms using standard RS-232 or 0–10 V analog interfaces (optional add-on module). All timing events—including ignition activation, flame duration, and self-extinguishment detection—are logged with millisecond resolution when paired with compliant digital timers meeting ASTM E178 Class II accuracy specifications. Calibration records, operator IDs, environmental ambient logs (temperature/humidity), and raw observational notes are retained per FDA 21 CFR Part 11-aligned documentation practices where required.

Applications

• Qualification testing of insulated conductors for residential, commercial, and industrial wiring systems prior to CCC or CE marking.
• Comparative flame-retardant formulation screening for polymer compounders developing halogen-free flame-retardant (HFFR) insulation materials.
• Production line quality assurance checks for cable manufacturers verifying batch-to-batch consistency in flame propagation resistance.
• Technical due diligence assessments for procurement engineers evaluating supplier-submitted fire-test reports against contractual flame-performance clauses.
• Educational demonstration of vertical flame propagation physics in university-level polymer science and fire safety engineering curricula.

FAQ

Does the JB-300F support automated data export to Excel or CSV formats?

No—the base configuration uses discrete hardware timers and manual observation. Optional DAQ integration enables structured digital logging.
Is calibration certification included with shipment?

A factory-issued calibration report (traceable to NIM, China) is provided; on-site metrological verification must be performed annually by an ISO/IEC 17025-accredited lab.
Can the unit be configured for methane instead of propane?

Not without modification: burner nozzle geometry, pressure regulators, and flow meter calibration are optimized specifically for propane/LPG per IEC 60332-1-2 Annex A.
What electrical supply requirements apply?

220 V AC ±10%, 50 Hz, 16 A dedicated circuit with earth leakage protection (RCD ≥30 mA) is mandatory.
Is the test chamber exhaust system included?

No—exhaust ducting, fume hood integration, and post-combustion scrubbing must be implemented locally per national occupational health and safety regulations (e.g., OSHA 1910.1200).