Proven Coating Consistency — Every roll of 650gsm PVC Coated Tarpaulin ships with a weight verification record matched to the batch you approved, eliminating the gap between quoted specification and delivered material.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | PVC Coated Tarpaulin Roll |
| Base Fabric | 1000D × 1300D Polyester |
| Mesh Count | 20 × 20 |
| Weight | 650 GSM |
| Total Thickness | 0.46 mm |
| Tensile Strength (Warp) | 2550 N |
| Tensile Strength (Weft) | 2250 N |
| Coating Material | PVC on Polyester Base |
| Surface | Double-sided PVC coating |
| Key Features | Water Resistant, Waterproof, Anti-UV (test basis not stated), Flame Retardant (grade not stated) |
| Repairability | Hot air weldable |
| Additional Grades Available | 350 / 400 / 420 / 500 / 600 / 750 / 900 GSM |
| Certification | ISO, CE |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Mining ventilation duct | Continuous airflow, fire-retardant and anti-static compliance, abrasive dust contact |
| Tunnelling air supply duct | Confined space safety standards, flame retardant certification, longitudinal tensile load |
| Membrane structure fabric | Wind loading, UV exposure, structural tension at attachment points |
| Inflatable structure envelope | Internal pressure stress, repeated inflation cycles, weather exposure |
| Aviation hangar ventilation | Fire safety compliance, large-format fabric continuity, duct flexing |
| Construction site extraction duct | Particulate-laden airflow, mechanical impact risk, temporary installation handling |
When Fire-Retardant Claims Fail the Site Inspection
PVC Coated Tarpaulin 650 gsm fire retardant certified material must arrive with documentation that matches the specification your site safety officer requires — not just a line item on the commercial invoice.
A fire-retardant claim without a grade is a compliance gap waiting to be found at inspection.
Ventilation ducts in mining and tunnelling operate under strict fire safety regulations. When the fabric arrives without a test report tied to a recognised standard, the entire duct run can be rejected before it is ever hung. The cost is not just replacement material — it is the downtime on a face that cannot advance until compliant ventilation is in place. [NEED_CITE: fire classification standards for underground ventilation ductwork] I have seen contractors forced to strip newly installed duct sections because the supplier could not produce a batch-specific flame retardant certificate. The procurement conversation needs to happen before the order is placed, not after the delivery arrives on site.
Ventilation Duct Construction Demands More Than Weight
Mining and tunnelling ventilation ducts require fabric that holds its form under negative and positive pressure cycles while meeting fire safety standards specific to underground environments. The 1000D × 1300D polyester base at 20 × 20 mesh count provides the dimensional stability needed for long duct runs that must resist collapse under suction. PVC Coated Tarpaulin 650 gsm fire retardant certified grade availability means the fabric can be specified to match the fire classification your jurisdiction mandates, but the exact grade must be confirmed at inquiry stage to ensure the test report aligns with your site requirements.
Matching Flame Retardant Grades to Market Requirements
Different markets reference different flame retardant standards — M2 in France, B1 under DIN 4102 in Germany, NFPA 701 in North America. A single PVC coated tarpaulin product family can be formulated to meet various grades, but the treatment chemistry differs between them. Ordering without specifying which standard applies at your installation site risks receiving material certified to a grade your local inspector does not recognise. [NEED_CITE: international flame retardant classification systems for coated textiles] Always provide your target compliance standard when requesting a quotation so the correct formulation is produced and documented.
How Base Fabric Density Governs Real-World Tensile Performance
The 650 GSM weight tells you how much material is present per square metre, but tensile strength comes from the base fabric architecture. At 1000D × 1300D with a 20 × 20 mesh count, the warp yarns carry a higher denier than the weft, which is reflected in the differential tensile values of 2550 N warp and 2250 N weft. This directional strength profile matters when fabricating ducts that experience longitudinal tension from hanging cables and lateral stress from internal pressure. The 0.46 mm total thickness at this GSM indicates a coating weight that encapsulates the base fabric fully, which is necessary for weld seam integrity — a thin coating leaves yarns exposed at the heat-weld interface and creates failure points where duct sections join. Coating adhesion to the polyester base determines whether the weld holds to the coating or whether the layers delaminate under flex load.
The Consequence of Undocumented Flame Retardant Treatment
When flame retardant treatment is claimed but not backed by a batch-specific test report, the fabric may pass initial visual inspection but fail when a safety auditor requests documentation weeks later. This is not a material defect — the fabric may perform identically to certified stock — but without the paper trail, it cannot be used on regulated sites. [NEED_CITE: documentation requirements for fire-rated materials in mining ventilation] The rework involves removing installed duct, sourcing compliant replacement, and managing the schedule delay that follows. Specifying the required grade and demanding the test report ship with the rolls eliminates this exposure entirely.
Why Technical Buyers Source This Grade Here
Three full production lines run PVC coating under controlled conditions, so coating weight and adhesion stay within tolerance across every roll in your order. The 10-person R&D team handles formulation adjustments when your project requires a specific flame retardant grade or anti-static surface resistance range. Dedicated QA and QC at every production stage means GSM, thickness, and tensile values are checked in-process — not just sampled from the first roll off the line. 100% pre-shipment inspection catches colour variation and coating defects before the material leaves the facility. [NEED_CITE: in-process quality control methods for PVC coated fabric production] Sample development within days allows you to verify weld parameters and colour match before committing to production volume.
Documentation & Verification
- Material specification sheet confirming 650 GSM, 1000D × 1300D base, and 0.46 mm thickness per roll
- Flame retardant test report issued against the specific batch when grade is confirmed at order
- UV treatment documentation provided where anti-UV grade is specified for outdoor duct exposure
- ISO and CE certificates included in the dispatch documentation package
- Pre-shipment inspection record verifying weight, thickness, and colour against your approved specification
Fabrication, Handling & Storage
- Hot air welding at temperatures matched to 0.46 mm PVC coating thickness for reliable seam fusion
- Store 650 GSM rolls upright on pallets to prevent flat-spot deformation of the polyester base
- Allow cold-stored rolls to reach ambient temperature before unrolling to avoid coating crack at low flex
- Overlap weld seams by a width appropriate to 0.46 mm total thickness for duct section joining
- Clean PVC surface with mild detergent only — solvents degrade the coating layer on this grade
What to Include in Your Inquiry
Provide the ventilation duct diameter, run length, and whether the installation is underground or surface-level so we can confirm the fabric meets your structural and compliance requirements. Specify the flame retardant standard your jurisdiction references — M2, B1, NFPA 701, or another — along with any anti-static surface resistance range required. Indicate whether you need rolls at standard width for your own fabrication or pre-cut panels with welded seams.
Frequently Asked Questions
Q: Which flame retardant standards are available for this 650 GSM grade?
A: The fabric can be formulated to meet several flame retardant classifications including M2, B1 per DIN 4102, and NFPA 701. The specific grade must be confirmed at inquiry stage so the correct treatment chemistry is applied and the matching test report ships with your order.
Q: Is anti-static treatment available for mining duct applications?
A: Anti-static treatment with measurable surface resistance data is available for underground ventilation duct requirements. Provide your target resistance range or the regulation you must comply with so the formulation can be verified before production.
Q: How is the 650 GSM weight verified before shipment?
A: Each roll undergoes weight verification during 100% pre-shipment inspection. The inspection record confirming actual GSM against the stated specification is included in your dispatch documentation package.
Q: What welding parameters suit this 0.46 mm PVC coated fabric?
A: Hot air welding is the recommended joining method. Temperature and speed settings depend on your specific welding equipment, so we recommend requesting a sample to establish parameters on your machines before committing to full production.
Q: Can I order a sample to test flame retardant compliance before placing a bulk order?
A: Sample development is available within days for custom requirements including specific flame retardant grades. Submit your target standard and any additional treatment needs so the sample reflects the exact formulation you will receive in production.
