High-Quality Flexible PVC Clear Hose from China: Compatibility, Sizing and Documentation FAQ

When procurement teams and distributors evaluate a high-quality flexible PVC clear hose from China, they typically need clear answers on construction, sizing, temperature performance, chemical compatibility, and what documentation a supplier provides. The following FAQ addresses those questions for the 3 Layer Flexible PVC High Pressure AIR HOSE supplied by Hebei Kebing Import and Export Trade Co., LTD.

Q1 — What is the 3 Layer Flexible PVC High Pressure AIR HOSE made of, and what does each layer do?

The hose is constructed from three functional layers:

• Inner and outer wall layers — made from virgin soft PVC and synthetic rubber. Using 100 % brand-new (not recycled) materials prevents premature cracking and supports a maximum service life of five to six years.
• Reinforcement layer — two layers of precision-braided high-strength polyester fibers are knitted together between the wall layers. This double-braided polyester construction provides pressure resistance and tensile strength.

The result is a tube that is non-toxic, flexible, corrosion-resistant, acid- and alkali-resistant, and tensile-resistant, with a bright, vivid appearance.

Q2 — What sizes are available, and how do I read the specification table?

Sizes run from 1/4" (6 mm I.D.) up to 2" (50 mm I.D.). Each size row in the specification table lists five columns:

For example, a 3/8" hose has an I.D. of 9–10 mm, an O.D. of 15–16 mm, a working pressure of 20 bar, and a burst pressure of 60 bar. Larger sizes (1" and above) carry a reduced working pressure of 15 bar. Always match the I.D. to your fitting and confirm the working-pressure column against your system's operating pressure before ordering.

Q3 — What is the operating temperature range, and will it stay flexible in cold weather?

The hose is rated for −10 °C (+14 °F) to +65 °C (+150 °F). A dedicated four-season soft formula is incorporated into the compound to maintain regular elasticity down to −10 °C. Standard hoses made from recycled or lower-grade PVC typically stiffen around 0 °C after one to two years of service; this product is specifically formulated to remain pliable at sub-zero temperatures throughout its service life.

Q4 — Which equipment and applications is this hose compatible with?

The confirmed application list includes:

• Air compressors
• Rock drills
• Automated airlines and air-supply systems
• Pneumatic tools and pneumatic devices
• Gas flushing equipment
• Cleaning equipment
• Construction and civil engineering equipment
• Mechanical maintenance and engine components
• Windpipes and air pipes

The smooth, clear inner layer supports unobstructed airflow. The hose is described as suitable for mechanical maintenance, compressors, engine components, windpipes, air pipes, gas flushing equipment, pneumatic devices, and civil engineering equipment.

Q5 — Can the hose be supplied in different colors? Is clear the only option?

The inner tube material can be clear or black PVC compound. For the outer appearance, the product literature confirms the hose can be manufactured in clear, red, green, blue, purple, yellow, and other vibrant colors. Color-coding is particularly useful on job sites to prevent trips and to distinguish different gas or pressure lines at a glance. Color options should be confirmed with Hebei Kebing Import and Export Trade Co., LTD at the time of ordering.

Q6 — How does the 3-layer version compare to a 5-layer PVC air hose?

Both product lines share the same core PVC-and-polyester construction principle but differ in reinforcement intensity and working-pressure ratings:

Choose the 3-layer product when your system pressure falls within 15–20 bar and you require a five-to-six-year service life from virgin materials. The 5-layer product is designed for higher-demand applications requiring greater burst-pressure margins.

Q7 — What documentation or quality checks should I ask for when sourcing this hose from China?

• Material inspection — strict multi-stage inspection of virgin PVC and polyester braiding to meet global pressure standards.
• Burst-pressure testing — production batches are verified against the published burst-pressure values in the specification table.
• Zero-leakage shipping standard — the manufacturer states that hoses are checked for zero leakages before shipment.
• Custom specification capability — the supplier can adjust wall thickness and I.D. to client requirements, and provide tailored lengths and colors.
• After-sales technical support — expert guidance on choosing the correct hose I.D./O.D. for specific working pressures and chemical exposures is available.
• Inventory and logistics — large stock of standard sizes is maintained for immediate dispatch; optimized shipping channels are used for bulk orders.

Buyers should request product data sheets, pressure test certificates, and material compliance documents directly from Hebei Kebing Import and Export Trade Co., LTD to confirm they meet the import standards of their target market (US, Middle East, Europe, or Southeast Asia).

For detailed specifications, size availability, and ordering information, contact Hebei Kebing Import and Export Trade Co., LTD directly.