Stainless steel needle - high-precision thin-walled capillary needle
Purpose: The main component of a sterile single-use injection needle is a stainless steel tube, which, together with the needle base and protective cap, forms the finished injection needle product.
Specification: The nominal outer diameter of the tube of a sterile disposable injection needle ranges from 0.18 mm to 1.2 mm.
| Nominal outer diameter (mm) | Caliber (G) | Standard Length Range (mm) | Main purpose |
| 0.18–0.3 | 33G–31G | 1.5–13 | Intradermal injections (eg skin testing), insulin injections, precision cosmetic injections |
| 0.33–0.36 | 29G–28G | 10–25 | Subcutaneous injections (eg, vaccines, insulin) |
| 0.4–0.5 | 27G–25G | 16–40 | Subcutaneous/intramuscular injections (standard medicinal solutions) |
| 0.55–0.7 | 24G–22G | 25–40 | Intravenous injections/blood draws (standard infusions, blood draws) |
| 0.8–1.2 | 21G–18G | 30–50+ | Rapid infusion/blood transfusion/contrast administration (if high flow rate required) |
Needle length: Common length sizes: 10 mm, 13 mm, 16 mm, 20 mm, 25 mm, 30 mm, 38 mm, 40 mm, 50 mm and others. The choice is made depending on the required injection depth.
Material: Medical grade 304 stainless steel, which has good strength, corrosion resistance and biocompatibility.
Medical equipment:
1.Application scenarios: Surgical instruments (staplers, ultrasonic scalpels), diagnostic equipment (endoscopes), interventional therapy (catheters) and other key medical supplies and equipment.
2.Standards and requirements: It is necessary to simultaneously satisfy the requirements of biocompatibility, micron processing precision, high cleanliness of the production environment, as well as corrosion resistance to the effects of physiological body fluids.
3.Key advantages and solutions of Xinliang: Based on many years of experience in deep long-term cooperation with renowned medical enterprises, we deeply understand clinical needs and offer highly reliable customized production solutions that comply with the GMP standard.
Chemical composition of stainless steel
| Steel grade | C | Si | Mn | P | S | Cr | Ni | Mo | Ti |
| SUS304 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0-20.0 | 8.0-10.5 | - | - |
| SUS304L | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0-20.0 | 8.0-12.00 | - | - - |
| 316L | ≤0.03 | ≤0.075 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | - |
| 321 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 17.0-19.0 | 9.0-12.0 | - | ≥5×C |
Product range
We can produce various types of stainless steel tubes with outer diameter from 0.4mm to 16.0mm and wall thickness from 0.05mm to 1.2mm. We have a significant advantage in the production of small diameter tubes and thin-walled tubes, which allows us to fully meet the stringent requirements of the precision manufacturing industry.
| Outer diameter OD (mm) | Wall thickness WT (mm) | 0.05-0.1 | 0.1-0.12 | 0.12-0.15 | 0.15-0.18 | 0.18-0.2 | 0.2-0.25 | 0.25-0.6 | 0.6-0.8 | 0.8-1.2 |
| 0.4 | V | V | V | |||||||
| 0.5 / 0.6 | V | V | V | V | ||||||
| 0.7 | V | V | V | V | ||||||
| 0.8 / 0.8-1.0 | V | V | ||||||||
| 1.0-2.0 | V | V | V | V | V | |||||
| 2.0-2.5 | V | V | V | V | V | |||||
| 2.5-3.0 | V | V | V | V | V | V | ||||
| 3.0-5.0 | V | V | V | V | V | |||||
| 5.0-7.0 | V | V | V | |||||||
| 7.0-10.0 | V | V | V | |||||||
| 10.0-16.0 | V | V |
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