1. Product Overview

The Hydrogen Peroxide (H₂O₂) Transfer Needle is a key fluid delivery component developed by our company for medical sterilization and precision chemical systems. It is specifically designed for the safe transfer and injection of liquid or vapor-phase hydrogen peroxide.

Although compact in structure, the H₂O₂ transfer needle demands exceptional precision in geometry, sealing performance, and material compatibility. Given hydrogen peroxide’s strong oxidizing nature, even microscopic defects—such as welding pores or machining residues—can compromise stability and safety.

Therefore, throughout research, development, and production, we uphold three core principles: structural reliability, precision manufacturing, and long-term stability. Each manufacturing stage is meticulously controlled to ensure product consistency and safety.

2. Structural Features and Design Concept

Each H₂O₂ Transfer Needle consists of three key sections: the needle tube, base, and tail tube.

The needle tube is made from a thin-walled stainless steel capillary. Its front end is precisely formed and tapered into a sealed conical tip to prevent direct forward ejection of hydrogen peroxide. A laser-drilled lateral through-hole located just below the needle tip is the core feature of the entire structure—it enables hydrogen peroxide to be released evenly from the side, ensuring smooth and controlled delivery.

The base section adopts a hexagonal threaded design, allowing easy installation and stable mechanical support during operation. An internal channel within the base matches the diameter of the needle tube and connects to a short rear extension tube of the same material, forming a seamless transition to the equipment interface.

The entire assembly is welded into one integrated structure, enhancing both mechanical strength and sealing performance. We use medical-grade 316L stainless steel, which provides outstanding corrosion and oxidation resistance—even under prolonged exposure to high-concentration hydrogen peroxide, the surface remains free from pitting or ion leaching. Every design detail—from the taper angle of the needle tip to the threading geometry of the base—has been optimized for precision and reliability.

3. Production and Manufacturing Process

Manufacturing an H₂O₂ Transfer Needle requires a combination of precision machining, laser fabrication, and advanced surface treatment technologies. The entire process includes the following stages:

1. Raw Material Preparation:

Medical-grade 316L stainless steel is selected according to medical device standards. Each batch is tested for purity, hardness, and chemical composition to eliminate impurities or internal stress defects before processing.

2. CNC Precision Machining of the Base:

The hexagonal threaded base is produced from stainless steel rod using multi-axis CNC turning and milling. The machining process ensures precise threading, symmetric geometry, and perfect coaxial alignment between the inner bore and the needle tube. Each piece undergoes fine deburring and surface smoothing to prevent micro-defects that could affect later welding or sealing.

3. Needle Tube Forming:

The needle tube represents the most technically demanding part of the product. Using a tapered reduction mold, the thin capillary tube is gradually pressed to form a sealed conical tip. The surface is then micro-polished and electrolytically treated to achieve mirror-like smoothness without microcracks. This sealed design prevents H₂O₂ leakage from the front and maintains internal pressure stability.

4. Laser Perforation:

The lateral through-hole below the needle tip is precisely machined using high-power laser drilling. Compared with mechanical drilling, laser processing ensures minimal heat-affected zones and zero burr formation. Hole position accuracy directly determines fluid direction and flow angle, so this step requires micron-level precision. Each needle is inspected under a microscope to verify surface smoothness and dimensional accuracy.

5. Welding and Assembly:

The needle tube and base are joined by circumferential laser welding, a process that requires no filler metal or flux. The welds are ultra-clean and free from contamination, ensuring long-term sealing performance. After welding, every sample undergoes micrographic inspection to verify uniform penetration and pore-free weld seams. This welding method significantly enhances corrosion resistance and leak prevention, making it ideal for peroxide-handling components.

6. Surface Treatment and Cleaning:

All welded parts undergo electropolishing and passivation to improve smoothness and create a dense protective oxide layer. Then, multi-stage ultrasonic cleaning with deionized water and medical-grade detergents removes all residues or particles. Before drying, each component is tested for surface cleanliness to meet medical-grade hygiene standards.

7. Quality Inspection and Validation:

 Finished products are subjected to rigorous testing, including appearance, dimensional accuracy, pressure sealing, and weld integrity checks. Pressure tests ensure zero leakage under high-pressure conditions. Material compatibility tests verify that the needle maintains stability—no discoloration or corrosion—even after prolonged exposure to high-concentration H₂O₂.

8. Packaging and Shipment:

Products passing all inspections are packaged in a cleanroom environment. Optional sterile packaging, with ethylene oxide or hydrogen peroxide vapor sterilization, can be provided upon request. Each batch carries a unique serial number for full traceability and quality tracking.

4. Quality Management and Compliance

All production processes strictly comply with the ISO 13485 Medical Device Quality Management System. Every stage—from material sourcing and in-process verification to final inspection—is fully documented and auditable. Regular process validations (IQ/OQ/PQ) are conducted to ensure equipment stability and product consistency. This systematic approach guarantees that every H₂O₂ Transfer Needle is traceable, verifiable, and reproducibly manufactured to the same high standard.

5. Product Advantages and Application Fields

Key Advantages:

- Excellent Corrosion Resistance: Medical-grade 316L stainless steel and advanced passivation guarantee long-term chemical stability.
- Superior Sealing Performance: Circumferential laser welding prevents micro-leakage and ensures durability under pressure.
- Precise Fluid Control: The closed conical tip and side-hole discharge design ensure consistent flow and atomization.
- Easy Installation: The hexagonal threaded base offers secure mounting and compatibility with standard sterilization equipment.
- High Cleanliness: Electropolishing and ultrasonic cleaning provide a contamination-free surface meeting medical hygiene standards.

Typical Applications:

- Medical low-temperature plasma sterilizers
- Hydrogen peroxide diffusion and injection systems
- Laboratory sterilization and pharmaceutical equipment
- Medical device assembly and chemical delivery systems

6. Conclusion

Although small in size, the H₂O₂ Transfer Needle plays a crucial role in hydrogen peroxide sterilization and chemical delivery systems. Each precisely machined and inspected component ensures zero leakage and maximum operational safety.

At Manners Medical, we believe that true quality lies in precision and respect for every detail. We will continue to refine our manufacturing processes to deliver H₂O₂ transfer needles that are safer, more durable, and more reliable, serving as trusted components for global medical and industrial applications.