Production Process of Plastic Coated Tubing
5 month ago
Material
Plastic coated tubing is composed of stainless steel inner tubing and an outer plastic layer (commonly PVC, PE, or PP), combining the strength and corrosion resistance of stainless steel with the added protection and insulation of a plastic coating. The inner stainless steel tube is typically made of 304, 316, 316L, 309, or 317 grades—each known for excellent corrosion resistance and mechanical performance. The plastic layer protects the tubing during transportation, installation, and operation in corrosive, humid, or chemically active environments.
Specification
- Base Material: Stainless Steel Grades 304, 316, 316L, 309, 317
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Coating Materials: PVC (Polyvinyl Chloride), PE (Polyethylene), PP (Polypropylene)
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Outer Diameter Range: 6 mm – 25.4 mm (1/4” – 1”)
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Wall Thickness: 0.5 mm – 2.0 mm (customizable)
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Coating Thickness: 0.2 mm – 1.0 mm
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Standard Lengths: Coiled (up to 1000 m) or straight lengths
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Applicable Standards: ASTM A269 / A213 / A312, EN 10216-5, JIS G3459
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Operating Temperature:
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Stainless Steel Core: Up to 800°C (depends on grade)
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Plastic Coating: Up to 60–80°C (coating-specific)
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Key Features
- Double Protection: Stainless steel provides chemical and heat resistance, while the plastic coating enhances impact and abrasion resistance.
- Corrosion-Resistant: Ideal for corrosive and humid environments with frequent chemical contact.
- Flexible Installation: The coiled tubing format reduces the number of joints and speeds installation, especially for long pipe runs.
- Color-Coding Available: Customizable coatings facilitate visual identification and safety marking.
- Safe Operation: The plastic coating reduces the risk of surface damage or sharp edges during installation.
- Environmentally Adaptable: Suitable for indoor, outdoor, buried, or chemically exposed environments.
Chemical Composition
| Grade | C (max) | Mn (max) | Si (max) | Cr (%) | Ni (%) | Mo (%) | N (max) |
|---|---|---|---|---|---|---|---|
| 304 | 0.08 | 2.00 | 0.75 | 18.0 – 20.0 | 8.0 – 10.5 | — | 0.10 |
| 316 | 0.08 | 2.00 | 0.75 | 16.0 – 18.0 | 10.0 – 14.0 | 2.0 – 3.0 | 0.10 |
| 316L | 0.03 | 2.00 | 0.75 | 16.0 – 18.0 | 10.0 – 14.0 | 2.0 – 3.0 | 0.10 |
| 309 | 0.20 | 2.00 | 1.00 | 22.0 – 24.0 | 12.0 – 15.0 | — | — |
| 317 | 0.08 | 2.00 | 0.75 | 18.0 – 20.0 | 11.0 – 15.0 | 3.0 – 4.0 | — |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRB) |
|---|---|---|---|---|
| 304 | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 95 |
| 316 | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 95 |
| 316L | ≥ 485 | ≥ 170 | ≥ 40 | ≤ 95 |
| 309 | ≥ 550 | ≥ 205 | ≥ 40 | ≤ 95 |
| 317 | ≥ 515 | ≥ 205 | ≥ 30 | ≤ 95 |
Steel Grade
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304: Excellent general-purpose stainless steel with good formability and corrosion resistance.
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316: Superior resistance to pitting and chloride corrosion, ideal for marine and chemical processing.
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316L: Low-carbon version of 316 for improved weldability and reduced risk of sensitization.
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309: High chromium and nickel content for better high-temperature oxidation resistance.
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317: Enhanced molybdenum content for improved resistance to chemical attack and corrosion.
Application
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Chemical and Petrochemical Plants: Acid and solvent lines, instrument air tubing
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Water Treatment: Corrosive media transfer, demineralized water systems
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Food & Beverage: Clean process piping with external protection
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HVAC and Refrigeration: Coil tubing for low-pressure transport
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Pharmaceutical and Biotechnology: Sanitary fluid transfer in protected environments
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Underground & Concealed Piping: Extra coating guards against soil or wall corrosion
Possible Alternative Grades
- TP321: High-temperature stability suitable for welding environments
- TP310S: Excellent oxidation resistance at high temperatures
- S31803 (Duplex Steel 2205): High strength and resistance to stress corrosion cracking
- TP304H: Suitable for high-temperature and high-pressure environments
- XM-19 (Nitronic 50): High strength and excellent corrosion resistance
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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Main Product:
Seamless Steel Tubes,
Welded Precision Steel Pipes,
Automotive Steel Tubes,
Carbon steel tubes,
Stainless Steel Tubes,
Special Shaped Steel Tubes