LANGLI PVC Request a Catalog LANGLI PVC Request a Catalog Precision-molded, fire-retardant uPVC cable trunking, conduit fittings, and modular junction accessories engineered for rapid installation and long-term durability.
Modern electrical infrastructure requires wire routing systems that balance mechanical rigidity, flame resistance, dielectric strength, and environmental durability. Unplasticized Polyvinyl Chloride (uPVC), engineered specifically for wholesale electrical containment, has established itself as the global standard across commercial, industrial, and residential installations. Unlike plasticized PVC compounds that utilize phthalate esters for flexibility, uPVC exhibits superior tensile modulus, dimensional stability, and intrinsic self-extinguishing flame retardancy.
When selecting wholesale PVC ducting and conduit systems, engineering procurement officers must evaluate key material metrics that directly impact life safety and installation productivity. Flame propagation ratings such as UL 94 V-0 and Limiting Oxygen Index (LOI) values exceeding 32% ensure that in the event of an electrical fault, the ducting material will not sustain combustion or produce flaming droplets. Furthermore, continuous operational temperatures ranging from -15°C to +60°C demand precise compounding formulations containing heat stabilizers, titanium dioxide UV inhibitors, and high-impact modifiers.
Formulated with ultra-high volume resistivity (>1015 Ω·cm), shielding high-voltage power lines and sensitive telemetry cabling against electrostatic interference and short circuits.
Inherent flame resistance engineered to satisfy UL 94 V-0 standards. Stops burning within 10 seconds after ignition source removal, suppressing flame spread across cable pathways.
Impervious to aggressive industrial acids, alkalis, saline coastal air, and subterranean soil moisture, preventing oxidation that typically degrades traditional metal raceways.
Located in Foshan, Guangdong—the core global cluster for advanced polymer processing—our manufacturing footprint exemplifies Industry 4.0 transformation. Operating over 32 automated high-precision injection moulding units and continuous twin-screw extrusion profiles, the facility processes tens of thousands of metric tons of electrical grade rigid PVC resin annually.
By establishing strict vertical integration, our plant manages every stage of production internally: from micro-metered raw material compounding and color masterbatch blending to high-speed extrusion, automated length cutting, optical dimension inspection, and robotic carton packaging. This closed-loop ecosystem yields exceptional operational efficiencies that directly benefit global wholesale buyers:
Polyvinyl Chloride ducting and trunking systems serve as the mechanical backbone for wire and cable containment in diverse physical environments. Below is our engineered application deployment matrix:
Utilizing high-capacity, partitioned anti-static PVC wiring ducts under raised floors and overhead ladder racks. Separates fiber optics from heavy copper power conductors, preventing signaling crosstalk.
Surface-mounted slotted and solid-wall mini-trunking profiles for fast interior fit-outs. Snap-on lids allow swift cable drops and circuit additions without altering structural drywall finishes.
Heavy-gauge rigid uPVC conduits designed for processing plants where aggressive fumes, solvents, or moisture quickly disintegrate painted or galvanized steel wiring raceways.
Low-Smoke Halogen-Free (LSZH) customized PVC ducting alloys deployed in underground railway networks, ensuring human safety by eliminating toxic halogen gas emissions during thermal events.
High-UV resistant, heavy-duty rigid underground ducting protecting high-voltage DC string cables against soil shifting, moisture ingress, rodent chew, and prolonged solar UV radiation.
Self-adhesive tape-backed mini ducting profiles (10x10mm up to 39x19mm) engineered for seamless home automation, broadband optical fiber drops, and television cabling runs.
Below is a typical performance profile for our industrial uPVC electrical trunking and conduit compounds. All parameters are verified in-factory and independently audited by accredited international laboratories.
| Physical / Mechanical Property | Test Standard / Method | Unit Values | Engineering Significance |
|---|---|---|---|
| Material Base Compound | ISO 1163-1 / ASTM D1784 | Rigid uPVC (Unplasticized) | Eliminates migration plasticizers, maintaining long-term structural shape. |
| Density / Specific Gravity | ISO 1183 / ASTM D792 | 1.42 – 1.48 g/cm³ | Optimal material compaction ensuring high impact resistance and weight ratio. |
| Tensile Yield Strength | ISO 527 / ASTM D638 | ≥ 42 MPa (N/mm²) | Prevents stretching or sagging under high cable bundle weights over extended spans. |
| Vicat Softening Temperature | ISO 306 / ASTM D1525 | ≥ 81 °C (50 N load) | Ensures profile integrity inside hot electrical risers or industrial ambient environments. |
| Flammability Rating | UL 94 Specification | V-0 Rating | Self-extinguishing within 10 seconds; no flaming drips during thermal breakdown. |
| Limiting Oxygen Index (LOI) | ISO 4589-2 / ASTM D2863 | ≥ 32% | Material requires 32%+ atmospheric oxygen to support flame (ambient air is ~21%). |
| Dielectric Breakdown Strength | IEC 60243-1 / ASTM D149 | ≥ 25 kV/mm | Prevents high-voltage electrical arc-through across structural installation walls. |
| Cold Impact Resistance | BS EN 61386-1 (-15°C) | Heavy Duty (Class 4 / 2.0J) | Resists cracking or shattering when installed or struck in cold climate conditions. |
| Ingress Protection Potential | IEC 60529 (With Fittings) | IP40 to IP65 Capable | Protects internal wiring against dust penetration and pressurized water jets. |
As electrical safety standards evolve and the world shifts toward sustainable building practices, the manufacturing of PVC cable ducting is undergoing significant technology transitions. Our research and development center focuses on three key advancements:
Integrating bio-attributed PVC resins derived from tall oil and agricultural waste feedstocks, reducing embodied carbon footprints by up to 40% while preserving identical physical and thermal performance metrics.
Incorporating nano-clay and halloysite nanotube (HNT) reinforcement to reduce smoke density and eliminate toxic heavy-metal heat stabilizers (100% Lead-Free & REACH Compliant).
Developing co-extruded trunking equipped with RFID-chipped identification strips and color-coded interior separation channels, assisting facilities managers in automated cable asset mapping.
For international electrical distributors, building material wholesalers, and engineering EPC contractors, securing a dependable OEM/ODM supply partner is critical to project profitability and compliance. Our export division is specifically structured to handle high-volume procurement programs with maximum efficiency:
Our in-house toolroom engineers custom extrusion dies and injection molds within 30 to 45 days. Whether you require specific snap-lid retaining grooves, unusual cross-sectional geometry, or localized box knockouts, our CAD/CAM precision CNC machining delivers exact prototyping.
We provide comprehensive private-labeling options. Laser-etched or ink-jet logo printing directly on duct covers and fitting bodies ensures continuous brand visibility. Master shipping cartons are fully customized with your company barcodes, part numbers, and multi-lingual technical specs.
In addition to industrial standard Pure White, Electric Gray, Charcoal Black, and Ivory, our automated color compounding lines precisely match custom corporate Pantone references or architectural RAL shades for decorative open-ceiling installations.
Lower holding costs by combining up to 50 distinct SKUs—including rigid conduits, flexible corrugated tubing, mini-trunking, inspection elbows, tees, couplers, and 4-way junction boxes—into a single optimized container order.
Navigating cross-border electrical codes requires rigid documentation and verified testing compliance. Every batch of PVC ducting and conduit departing our Foshan plant undergoes stringent quality assurance protocols to guarantee seamless customs clearance and jobsite inspection approval.
Fully compliant with European Union safety Directives. Verified non-hazardous substance content guarantees zero lead, mercury, cadmium, or PBB/PBDE flame retardants.
Precision-moulded to match British Standard dimensions, wall thickness tolerances, thread pitches, and socket engagement depths required throughout the UK, Middle East, and Southeast Asia.
Supplied with formal Quality Inspection Reports covering low-temperature drop-weight impact testing, continuous heat deflection testing, and socket pull-off mechanical retention forces.
Explore our extended factory catalogue of high-demand PVC cable raceways, decorative wireways, and heavy-duty electrical fittings.
Comprehensive engineering and commercial responses to common buyer inquiries regarding PVC ducting, trunking manufacturing, and international export logistics.
Our factory manufactures rigid PVC conduits and electrical cable trunking in full accordance with international standards. Our tooling covers BS EN 61386-1 / BS 4607 (20mm, 25mm, 32mm, 40mm, 50mm metric series), European DIN specifications (16mm to 50mm), and American imperial series (1/2" to 2" NEMA/ASTM conduit). Trunking profiles range from 10x10mm mini-trunking up to 200x100mm heavy industrial cable ducting. Complete CE certificates and RoHS chemical test reports are kept on file for instant customs verification.
Unplasticized PVC (uPVC) contains zero plasticizing agents, resulting in significantly higher mechanical rigidity, greater tensile strength, and lower flammability. Our fireproof uPVC trunking is enhanced with specialized heat stabilizers and flame retardants achieving a UL 94 V-0 flammability classification and a Limiting Oxygen Index (LOI) > 32%. This ensures that the material will self-extinguish within 10 seconds of ignition source removal and will not produce flaming drops.
For standard catalog items in white or gray, our MOQ starts at 20 cartons per SKU, or a combined minimum of one mixed 20ft full container load (FCL). For OEM custom colors (Pantone matching), custom brand laser printing, or specific private-label packaging, the MOQ is typically 1,000 meters per size profile. Production lead time for standard items is 15 to 25 calendar days post-deposit, while initial OEM orders requiring custom mold tooling take 30 to 45 days.
Quality control operates under a multi-tier testing procedure. First, raw resin batches undergo melt flow index (MFI) and density screening. Second, online extrusion lines utilize continuous ultrasonic wall-thickness gauges and optical laser diameter sensors to prevent dimensional drift. Finally, finished profiles undergo laboratory drop-weight impact testing at -15°C, 960°C glow-wire flame tests, and socket fitment testing against gauge plugs before cartoning.
Yes. We offer continuous inline application of high-tack, double-sided foam tape on mini-trunking profiles (sizes 10x10mm up to 39x19mm). The adhesive is formulated for high initial tack and long-term shear strength on plaster, painted brick, wood, and metal surfaces, greatly accelerating installer productivity during indoor electrical retrofits.
Our logistics team utilizes specialized 3D container cubing software. Smaller fittings, junction boxes, circular conduit elbows, and couplers are packed inside heavy-duty cartons designed to nest inside or alongside long 2.9m / 3.0m conduit bundles and trunking lengths. This eliminates empty volumetric space (CBM air space), substantially lowering per-unit ocean freight costs for overseas distributors.