RF Welding Center

The science behind the seam

An inflatable boat is only as reliable as its seams. A single weak weld can compromise an entire chamber —?and at sea, a chamber failure is not an inconvenience; it is a safety hazard. At Aquafarer, we have invested in a dedicated Radio-Frequency (RF) Welding Center that combines industrial-grade dielectric welding presses with rigorous process control and post-weld testing. Every seam we produce is documented, traceable, and certified to meet or exceed the requirements of —?the international standard for inflatable craft.

RF welding uses high-frequency electromagnetic energy (typically 27.12 MHz) to excite the polar molecules within PVC or Hypalon-coated fabric, generating heat precisely at the material interface. Unlike hot-air or hot-wedge welding, RF welding creates a true molecular bond —?the two fabric layers fuse into a single homogeneous material at the weld zone, producing a joint that is as strong as the parent material itself.

Welding equipment and process control

Our welding centre is equipped with:

Every RF press is equipped with closed-loop temperature and pressure monitoring. Weld parameters —?power, press time, cooling time, electrode pressure —?are programmed per material type and recorded in our Manufacturing Execution System (MES) for full traceability.

Weld quality tests —?every seam, every boat

Weld integrity is verified through a mandatory four-test protocol:

1. Visual inspection —?100 % of seams are visually inspected for burn-through, misalignment, contamination, or incomplete fusion. Reject rate threshold: 0.5 % of linear metres.
2. Peel test () —?A 25 mm wide strip is cut from a test coupon welded with each production batch. Minimum peel force: 120 N/25 mm for PVC 1100 dtex.
3. Air-retention test —?Every completed chamber is pressurised to 1.5 × working pressure and held for 30 minutes. Pressure drop must not exceed 2 %.
4. Thermal cycling test —?Sample coupons are cycled from -20 °C to +60 °C for 50 cycles, then peel-tested again. Acceptable strength loss: < 10 %.

Professional expertise

Our welding team is led by a senior process engineer with 11 years of experience in dielectric welding of coated textiles. Each operator completes a 6-month in-house certification programme before being allowed to work on production seams. Recertification is required annually, including a practical weld test evaluated against our internal Grade-A standard (peel strength ≥ 160 N/25 mm).

Custom welding solutions for unique requirements

We understand that one welding specification does not fit every application. Our RF Welding Center routinely develops custom seam configurations for clients with special requirements:

• Multi-layer reinforcement patches —?for high-wear areas such as rubbing strakes and bow cones, we develop multi-pass RF welds that integrate a wear-resistant outer layer without compromising flexibility.
• Conductive or RFopaque seams —?for military or surveillance vessels requiring electromagnetic shielding, we weld in conductive mesh layers within the seam stack-up.
• Colourchange panel welding —?dual-colour fabric panels (e.g. orange hull + grey topside) welded with a concealed overlap to maintain brand aesthetics without a visible join line.

Our commitment to you

Every boat we deliver carries our weld-quality guarantee: if any seam fails in normal service within the warranty period, we repair or replace the affected chamber at no cost, and a root-cause investigation is performed to prevent recurrence. This is not simply a warranty —?it is a commitment to continuous improvement driven by real-world operational data.

When you choose Aquafarer, you are choosing seams that are engineered, tested, and documented —?not just welded. That is the difference between a boat that floats and a boat that performs.