Stainless steel tube coils|Seamless stainless steel tube coil
What are Stainless Steel Tube Coils?
Stainless steel tube coils are elongated cylindrical structures made from stainless steel, typically used in various industrial applications for heat exchange and fluid transportation. These coils are formed by winding stainless steel tubing into a spiral shape, creating a continuous coil with a uniform diameter.Stainless steel coils are used in various industrial sectors such as chemical, mechanical, electronic, electrical, medical equipment, aerospace, aviation, communication, and petroleum.
Stainless steel coils typically come in coiled or mosquito-repellent bent tubes with diameters ranging from 0.5cm to 20mm and thicknesses from 0.1cm to 2.0mm. These coils can withstand pressures of 60-100MPa and find extensive applications in industries such as chemical, mechanical, electronic, electrical, textile, rubber, food, medical equipment, aerospace, aviation, communication, and petroleum.
Stainless Steel Tube Coil Catalog:
1. Features
2. Applications
3. Specifications
Features of Stainless Steel Tube Coils:
Stainless steel industrial tubes, ultra-long coils, U-shaped tubes, pressure tubes, heat exchange tubes, fluid tubes, and spiral coils exhibit the following characteristics:
- High temperature steam resistance
- Corrosion resistance to impact
- Ammonia corrosion resistance
- Scale resistance
- Easy to clean, resistant to oxidation corrosion
- Long service life, reduced maintenance time and costs
- Good tube installation process, can be directly replaced, safe and reliable
- Uniform tube wall, 50-70% thinner than copper tubes, overall thermal conductivity superior to copper tubes
- Ideal heat exchange product for retrofitting old units and manufacturing new equipment in industries such as petrochemicals, power, nuclear industry, pharmaceuticals, and food. Stainless steel coils are widely used in industries such as petrochemicals, power, nuclear industry, pharmaceuticals, food, and more.
Applications of Stainless Steel Tube Coils:
1. Industrial
stainless steel tube coils: Used in heat exchangers, boilers, petroleum, chemical, fertilizers, synthetic fibers, pharmaceuticals, nuclear power, etc.
2. Fluid stainless steel coils: Used in beverages, beer, milk, water supply systems, medical equipment, etc.
3. Mechanical structure stainless steel coils: Used in printing, dyeing, printing machinery, medical instruments, kitchen equipment, automotive and ship accessories, construction, and decoration, etc.
4. Bright stainless steel coils: Formed by welding stainless steel strips and reducing the wall thickness. The process ensures uniform thickness, smoothness, and a seamless appearance. The reduction in wall thickness is accompanied by bright annealing, preventing the formation of oxide layers on both the inner and outer walls, resulting in a shiny and aesthetically pleasing finish, ideal for medical products.
Specifications of Stainless Steel Tube Coils:
- 3/8" * 0.049 * (1-2000m)
- 1/8" * 0.035 * (1-3500m)
- 1/4" * (0.035”-0.049) * (1-1800m)
- 1/2" * 0.049 * (1-1000m)
- Φ3 * 0.9 * (1-3500m)
- Φ4 * 0.9 * (1-2500m)
- Φ6 * 0.9 * (1-1700m)
- Φ8 * 1 * (1-1000m)
- Φ10 * 1 * (1-8000m)
- Φ(10-26)★(1-2) length (1-800m), diameter size according to customer requirements
Stainless Steel Tube Coil Standards and Materials:
Standards
1. ASTM A213-2022:
- Title: Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
- Scope: This standard covers seamless ferritic and austenitic steel tubes for high-temperature service, including heat exchangers and superheaters.
2. ASTM A269-2022:
- Title: Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service.
- Scope: This standard specifies the requirements for seamless and welded austenitic stainless steel tubing intended for general service and industrial applications.
3. JIS G4305:
- Title: Cold-rolled stainless steel plate, sheet, and strip.
- Scope: This standard covers cold-rolled stainless steel plate, sheet, and strip for general purposes.
4. GB/T 12770-2022:
- Title: Stainless Steel Tubes for Mechanical and Structural Purposes.
- Scope: This Chinese standard specifies the requirements for stainless steel tubes used for mechanical and structural purposes.
5. GB/T 12771-2022:
- Title: Welded Stainless Steel Tubes for Liquid Delivery.
- Scope: This standard covers welded stainless steel tubes intended for the delivery of liquids under pressure.
Materials
The materials listed are various grades of stainless steel, each with specific properties suitable for different applications:
1. 201:
- Low-cost austenitic stainless steel with low nickel content.
- Good corrosion resistance, particularly in mild environments.
2. 202:
- Similar to 201, with slightly higher manganese and nitrogen content.
- Better mechanical properties than 201 but still relatively low-cost.
3. 304:
- One of the most widely used austenitic stainless steels.
- Excellent corrosion resistance and formability.
- Used in a wide range of applications including kitchen equipment, chemical processing, and more.
4. 304L:
- A low-carbon version of 304.
- Enhanced resistance to intergranular corrosion after welding or stress relieving.
5. 316L:
- An austenitic stainless steel with added molybdenum.
- Improved corrosion resistance, especially against chlorides and other industrial solvents.
- Used in marine environments, chemical processing, and medical implants.
6. 317L:
- Higher molybdenum content than 316L, providing even greater corrosion resistance.
- Suitable for highly corrosive environments.
7. 321:
- Titanium-stabilized austenitic stainless steel.
- Excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range.
How to coil stainless steel tube?
Step-by-Step Guide:
1. Select the Right Tubing:
- Ensure the stainless steel tubing is suitable for coiling, typically softer grades like 304 or 316.
- Check the tubing specifications for diameter and wall thickness.
2. Prepare the Tubing:
- Clean the tubing to remove any debris or oil.
- Measure and mark the length of tubing you need for the coil.
3. Set Up the Bender or Coiling Machine:
- Choose the appropriate size bender or coiling machine for your tubing diameter.
- Adjust the machine settings according to the desired coil diameter and pitch.
4. Heating (Optional):
- For tight bends or smaller diameter coils, heating the tubing might be necessary.
- Use a heat gun or torch to evenly heat the section of the tube to be coiled. Be cautious not to overheat, which can weaken the material.
5. Start Coiling:
- Secure one end of the tubing in the machine or a fixed position.
- Slowly begin to bend or coil the tubing, applying steady pressure.
- For manual coiling, wrap the tubing around a form or mandrel of the desired diameter, ensuring even spacing between coils.
- For machine-assisted coiling, follow the machine’s instructions for feeding and coiling the tubing.
6. Ensure Even Coils:
- Maintain consistent tension to avoid kinks or flattening of the tubing.
- Use guides or clamps if necessary to keep the coils evenly spaced.
7. Finish and Inspect:
- Once coiling is complete, carefully remove the tubing from the machine or mandrel.
- Inspect the coil for uniformity and any signs of damage or deformation.
- Trim any excess tubing if needed using a tube cutter.
8. Final Adjustments:
- Make any minor adjustments to the coil shape by hand, ensuring it meets the required specifications.
Customization
- Dimensions: Custom lengths, diameters, and wall thicknesses.
- Surface Finishes: Polished, annealed, pickled, etc.
- Specific Mechanical Properties: Tailored to meet unique stress, strain, and load conditions.
- Compliance: Meeting additional standards or regulations as required by the end-users application.

Stainless steel coils|Seamless stainless steel Coil