Quick Links

Got a question?

Contact us direct on:

+44 (0) 118 989 6000

or use our online Enquiry form it is simple to use and we will reply within 24hrs (business days only).

Enquire »

Quality Assured

We hold independent and customer approvals covering our products and our quality systems.

Find out more »

Induction Tubes

The induction furnace and heating industry requires special grades of copper that may be made into special or standard coils of various characteristics in order to provide an efficient heating path.

Our CHIFF product is available, often immediately from inventory, to suit any induction requirement.

Cole Tubes Limited manufacture & stock a variety of circular, square and rectangular CHIFF for RF induction heating coils & high power transformers CHIFF is manufactured in high grade copper meeting, at least, the requirements of BS 2871 Pt2 C101/C103 CHIFF is supplied in the fully annealed condition for ease of manipulation.

Most sizes are possible in straight lengths or long copper coil tubing.

Rectangular & Square

The table shows common sizes for copper coil tubing.

Metric
MINOR OUTSIDE WALL MAJOR 20x 16x 12x 10x 8x SWG in
20 2.5   *          
2.0   *          
1.5   *          
1.0   *          
0.8   *          
16 2.0   * *        
1.5   * **        
1.0   * *        
0.8   * *        
12 2.0   * * *      
1.5   * * *      
1.0   * * *      
0.8   * * *      
10 2.0   * * * *    
1.0   * * * *    
0.8   * * * *    
8 1.5   * * * * *  
1.0   * * * * *  
0.8         * *  
6 1.5         * * *
1.0         * * *
0.8           * *
*
Usual size and wall thickness combination
**
Popular sizes often available from stock
Imperial
MINOR OUTSIDE WALL MAJOR 3/4 5/8 1/2 3/8 1/4 1/8
(0.75)x (0.625)x (0.5)x (0.375)x (0.25)x (0.125)x
3/4 10 0.128 *          
12 0.104 *          
14 0.080 *          
16 0.064 *          
18 0.048 *          
5/8 10 0.128 * *        
12 0.104 * **        
14 0.080 * *        
16 0.064 * *        
18 0.048 * *        
1/2 10 0.128 * * *      
12 0.104 * * *      
14 0.080 * * *      
16 0.064 * * *      
18 0.048 * * *      
3/8 16 0.064 * * * *    
18 0.048 * * * *    
20 0.036 * * * *    
22 0.028 * * * *    
1/4 16 0.064 * * * * *  
18 0.048 * * * * *  
20 0.036 * * * * *  
22 0.028 * * * * *  
1/8 20 0.036       * * *
22 0.028         * *
*
Usual size and wall thickness combination
**
Popular sizes often available from stock
Custom sizes up to 2 in (50 mm) available on request
Induction tubes - wall diagram