1. Manufacturing Process
(1) Raw Material Selection
High-quality austenitic stainless steel is typically used, such as:
- 304 / 304L
- 316 / 316L (preferred for higher corrosion resistance in hygienic applications)
(2) Forming Process
(A) Welded Tube Process (most common)
- Stainless steel strip → tube forming → automatic welding (usually TIG welding)
- Internal weld bead is removed and smoothed to ensure hygienic quality
(B) Seamless Tube Process (high-end application)
- Hot piercing → cold rolling / cold drawing → sizing
- Higher cost, but better structural integrity and purity
(3) Finishing Treatment (Critical Step)
This is the key to sanitary-grade tubes:
- Internal & external polishing (mechanical or electro-polishing)
- Surface roughness typically: Ra ≤ 0.8 μm or better
- Pickling & passivation to remove oxide layer and improve corrosion resistance
- Degreasing & cleaning to ensure oil-free and contamination-free surface
(4) Inspection & Quality Control
- Chemical composition analysis (spectrographic testing)
- Surface roughness measurement
- Non-destructive testing (eddy current / ultrasonic testing)
- Hydrostatic or pneumatic pressure testing
2. Applications
Food & Beverage Industry
- Dairy processing (milk, yogurt production lines)
- Beverage, beer, and juice transfer systems
👉 Requires hygienic, contamination-free piping
Pharmaceutical Industry
- Drug liquid transfer systems
- Purified water systems (PW / WFI)
👉 Extremely high cleanliness requirements
Biotechnology Industry
- Fermentation systems
- Sterile fluid handling systems
Cosmetics Industry
- Lotion, cream, and liquid product transfer
👉 Prevents contamination and ensures product purity
Semiconductor & High-Tech Industry
- Ultra-pure gas and liquid delivery systems
👉 Requires ultra-high internal surface finish
3. Key Features Summary
- Smooth internal surface prevents bacterial growth
- Excellent corrosion resistance (especially 316L)
- Easy to clean and compatible with CIP/SIP systems
- High purity and hygienic performance suitable for critical industries
If you want to get more information, please contact me!
Cherry
Website: www.jinyoumetal.com
Email: Cherry@jinyoumetal.com
WhatsApp/WeChat: +86 13373795593
