DERFLEX manufactures PVC tarpaulin water tanks from reinforced PVC coated polyester for irrigation, construction, emergency supply, temporary water storage and project-based industrial applications. Capacity, tank shape, fabric construction, thickness, valve layout, color and OEM packaging can be customized around the real operating conditions of the project.
The woven polyester reinforcement carries mechanical load, while PVC coating on both sides provides the waterproof, weldable barrier. Panels are joined by a controlled welding process and fitted with inlets, outlets and vents. The finished tank may be a closed pillow / bladder tank, a self-supporting onion tank, a rectangular flexible tank or a coated-fabric liner supported by a frame.
Steel and molded plastic tanks can be effective for permanent installations, but their transport volume and fixed geometry can make them inefficient for temporary, remote, seasonal or rapidly changing projects. A flexible PVC tarpaulin tank packs down when empty and can be transported closer to the point of use.
The tank form should be selected before finalizing GSM or thickness, because tank geometry changes load paths, filled height, accessibility and connection requirements.
A closed flexible tank that rises as it fills. It is a strong choice for portable water storage, irrigation, construction and applications where enclosed storage is preferred.
A quick-deploy open-top or covered tank that becomes self-supporting during filling. Useful where rapid field access and filling are more important than fully enclosed storage.
A custom flexible configuration for sites with restricted footprint, transport limitations or defined installation zones. Final dimensions must be reviewed against filled height and material stress.
A reinforced PVC liner supported by a steel or tubular frame. This direction is useful for aquaculture, temporary process water and open-tank applications that require stable geometry.
Flexible bladder designs can be developed for vehicle platforms or remote water transport. Load movement, restraint, baffles and local transport requirements must be evaluated separately.
For distributors, tank fabricators and project buyers, DERFLEX can discuss custom fabric construction, capacity, marking, accessories and packaging rather than forcing every order into one stock specification.
Use these values as sourcing directions rather than universal finished-tank limits. Final tank construction should be approved against capacity, geometry, liquid, operating temperature, site conditions and required documentation.
| Specification | DERFLEX Project Direction | Procurement Note |
|---|---|---|
| Base Material | High-tenacity polyester reinforcement with PVC coating on both sides | Mechanical strength comes from the complete coated textile—not PVC thickness alone. |
| Reinforcement | 1000D-class polyester constructions available; an existing DERFLEX tank reference uses 1000D × 1000D, 20 × 20 | Yarn denier and thread density should be selected according to filled load and geometry. |
| Fabric Weight | Project-specific; an existing DERFLEX heavy water-tank reference uses 1200 gsm | Do not compare suppliers only by GSM. Check tensile, tear, coating adhesion and weld performance. |
| Thickness | Existing DERFLEX water-tank material direction: approximately 0.7–1.5 mm | Higher thickness may improve some durability aspects but also changes folding and welding behavior. |
| Capacity | Existing DERFLEX material / flexible-tank references: approximately 100–500,000 L | Very large tanks require review of filled dimensions, ground load, seam stress and drainage. |
| Welding | HF / RF welding and other compatible thermal welding routes depending on coated fabric and geometry | Representative weld samples should be validated for important OEM programs. |
| Tank Shapes | Pillow / bladder, onion, rectangular, frame-supported liner and custom fabrication | Tank style should be selected from operating method, access and site footprint. |
| Connections | Inlet, outlet, air vent, flange, threaded fitting and custom valve positions | Fittings concentrate stress and need dedicated reinforcement around attachment zones. |
| Ground Protection | Optional groundsheet / protective layer | Recommended on rough concrete, gravel or sites where puncture and abrasion are possible. |
| Temperature Direction | Selected DERFLEX water-tank materials are specified around -30°C to +70°C | Finished-tank suitability must be confirmed for actual liquid and operating conditions. |
| Color / Branding | Blue, grey, green, black and other project colors; custom marking available | Confirm print area, folding pattern and seam locations before bulk production. |
Specification note: published DERFLEX legacy pages include multiple tank and material constructions. The correct final specification should be confirmed on the quotation / technical sheet for the specific order.
A PVC tarpaulin tank is a pressure-loaded textile structure. The most useful buying question is not “Which tank has the highest GSM?” but “Which material-and-weld system is designed for my filled dimensions and service conditions?”
Instead of requesting only “900 gsm” or “1200 gsm,” send:
This gives the manufacturer enough information to recommend a more defensible construction.
Existing DERFLEX images show both closed flexible bladders and large open / supported containment systems fabricated from coated technical textiles.
| Capacity Direction | Typical Uses | Important Selection Questions |
|---|---|---|
| 100–1,000 L | Compact field storage, mobile supply, small equipment / temporary jobs | Handling, connection size, folded dimensions and transport method. |
| 1,000–5,000 L | Farm water, small irrigation, construction service water, backup storage | Groundsheet, filling rate, outlet position and deployment frequency. |
| 5,000–20,000 L | Agricultural irrigation, site supply, temporary municipal / emergency storage | Tank footprint, fabric construction, seam layout and hose support. |
| 20,000–50,000 L | Bulk temporary water, infrastructure, remote projects and emergency reserve | Ground loading, reinforced fittings, safe access and controlled drainage. |
| 50,000–500,000 L | Large engineered water-storage projects | Project drawing, filled height, site preparation, seam stress, valve flow and deployment method. |
Flexible water storage for fields, orchards, greenhouses, livestock and seasonal irrigation where rigid tank transport is inconvenient.
Temporary service water, dust suppression, cleaning, remote jobsite supply and project water staging.
Rapid-deployment reserve for disaster response, temporary camps and disrupted infrastructure. Required water-contact standards should be specified in advance.
Temporary or seasonal storage paired with filtration / collection systems where a collapsible tank is useful.
Frame-supported or custom tanks for fish farming, quarantine, RAS and temporary water management.
Process water, wash water, wastewater and selected liquid-storage projects can be reviewed. Compatibility must be confirmed against the actual medium before approval.
DERFLEX's value is not only the finished tank. The company also produces PVC coated tarpaulin material used in flexible containment, allowing material and fabrication discussions to be connected.
Confirm capacity, liquid, tank type, site footprint, climate, deployment cycle and connection requirements.
Match reinforcement, PVC coating, weight, thickness and surface requirements to the operating conditions.
Panel geometry and seam locations are planned around the final tank shape and load path.
Compatible PVC coated fabric can be joined using high-frequency welding, with weld parameters matched to the selected material.
Inlets, outlets and vents are high-stress zones and require suitable attachment and reinforcement design.
Check dimensions, seams, fittings, workmanship and accessories before the tank is folded and protected for shipment.
A generic PVC tank should not automatically be described as suitable for every liquid. The correct formulation and finished-tank documentation depend on the actual storage medium and market requirements.
PVC coated polyester is a practical solution for many flexible water-storage programs because it combines reinforcement, waterproofing, weldability and cost control. TPU coated fabric may be considered for selected projects where repeated folding, low-temperature flexibility, abrasion behavior or a specific contact requirement points to a different coating system.
The correct choice should be made from project conditions, not from the assumption that one polymer is universally better.
Compare Flexible Water Tank MaterialEven a reinforced PVC tarpaulin tank can be damaged by an unsuitable deployment surface. As the tank fills, thousands of kilograms of water can press the membrane continuously against the ground.
The fastest route to a useful quotation is to define the operating conditions before asking for a GSM or price.
DERFLEX manufactures PVC coated tarpaulin material and also fabricates flexible containment products, so coated-textile selection and finished-tank production can be discussed together.
Rather than relying on one generic water-tank construction, capacity, thickness, reinforcement and fitting layout can be reviewed against the actual job.
Custom color, logo, packing, valve arrangement, accessories and repeat-order specifications can be discussed for distributors and project procurement teams.
It is typically fabricated from woven high-tenacity polyester reinforced with PVC coating on both sides. The polyester provides tensile and tear strength, while the PVC coating provides the waterproof and weldable surface needed for flexible tank fabrication.
There is no universal best GSM. DERFLEX has existing tank references that include heavy 1200 gsm construction, but the correct specification also depends on tank capacity, filled height, yarn denier, thread density, tensile and tear performance, coating adhesion, seam design and fitting reinforcement.
1000D-class polyester reinforcement is used in heavy coated-fabric constructions, including existing DERFLEX water-tank references. However, “1000D” alone does not define suitability. The complete fabric construction, coating, weld behavior and finished tank geometry should be reviewed.
Existing DERFLEX water-tank material references cover approximately 100 L to 500,000 L. Large-volume tanks should be treated as engineered projects because footprint, filled height, ground loading, seam stress, connection size and safe drainage become more important as capacity increases.
A pillow tank is a closed flexible bladder that expands into a low-profile shape during filling. An onion tank is a self-supporting field tank that provides easier top access and rapid deployment. The preferred structure depends on contamination control, access and operating method.
PVC coated polyester is designed as a waterproof technical textile and can be thermally welded into sealed tank panels. Finished-tank leak performance also depends on weld quality, seam design, fitting attachment, material condition and correct deployment.
Only when the selected PVC formulation, seams, fittings and finished system meet the required potable-water or food-contact standard for the destination market and project. Potable-water suitability should be confirmed specifically rather than assumed from the word “PVC.”
Compatibility must be checked case by case. Provide the exact chemical or liquid, concentration, pH, temperature and contact duration. A standard PVC water tank should not be assumed suitable for every fuel, solvent or chemical.
Compatible PVC coated fabrics can be joined by high-frequency / RF welding and other controlled thermal welding processes. Welding parameters, seam width and reinforcement should be matched to the selected fabric and tank design.
Yes. OEM projects can discuss tank capacity, finished dimensions, inlet / outlet sizes, vent position, valve type, color, logo, packing, groundsheet and accessories. Provide a drawing or complete RFQ for the fastest evaluation.
Send your required capacity, tank type, stored water / liquid, available footprint, operating temperature, valve details, quantity and destination. DERFLEX can review the PVC coated fabric construction, thickness, fittings, OEM requirements and finished-tank direction before quotation.