Phone:

281-255-4775

877-466-0055 (toll free)

Fax:

281-516-7878

www.vulcanfinnedtubes.com

1.0

SCOPE

1.1

This specification governs materials, fabrication, and tolerances applicable to Aluminum L-Foot finned tubes fabricated by Vulcan Finned Tubes, L.P. (“Vulcan”).

2.0

BARE TUBE REQUIREMENTS

2.1

The base tube may be supplied by the customer or by Vulcan, as agreed between the two parties.

2.2

Mill test reports or other acceptable manufacturer’s certification shall be provided to the customer for all tubes supplied by Vulcan.

2.3

Tubes must be straight and free of any flat spots on the outside diameter. 

2.4

Length tolerance for tubes cut to length by Vulcan shall be as follows:

3.0

FIN MATERIAL REQUIREMENTS

3.1

Fin material shall be either aluminum 1100-0 or 5005, as specified. 

3.2

If requested by customer at time of order, Vulcan shall furnish mill test reports or other acceptable manufacturer’s certification for fin strip materials.

3.3

Fin material thickness before being formed and tension-wound around the tube shall be as specified, within a tolerance of plus or minus 0.001 inch.  After finning, tolerance on fin thickness, as measured at the centerline of the fin height shall be plus or minus 0.002 inch.

3.4

Fin material width before formed and tension wound around tube shall be as specified, within a tolerance of plus or minus 0.005 inch.

4.0

MANUFACTURE

4.1

Tubes are not required to be cleaned prior to finning unless specified.

4.2

The attachment between the fin and the tube will be a L-foot tension wound mechanical bond.  Fin attachment is to be secure over entire length of tube with no loose fins.

4.3

The cup of the fin shall be uniform throughout the entire length of the tube.

4.4

Splices in fins are permissible providing that no splice is within 10 feet of another, and number of tubes with splices do not account for more than 10 percent of the total number of tubes in the order.

4.5

Outside diameter of the fin shall be be equal to the sum of the specified tube diameter and twice the specified fin height, within a tolerance of plus 0 and minus 0.015 inch after finning.

4.6

The number of fins per inch of tube length shall be as specified within a tolerance of plus or minus five percent, as determined over a distance of not less than 12 inches of finned tube length.

4.7

The length of unfinned sections (bare ends) on the finished finned tube shall be as specified within a tolerance of plus or minus 1/4 inch.

5.0

INSPECTION AND TESTS

5.1

Upon arrival at Vulcan’s facility, tubes shall be visually inspected to verify dimensions and proper material identification.  Tubes will also be inspected for any obvious injurious defects.  If tubes are supplier by the customer, any defects found during inspection shall be reported to the customer.

5.2

Upon arrival at Vulcan’s facility, fin material shall be visually inspected to verify dimensions and proper material identification.  Fin material will also be inspected for obvious injurious defects.  Any material found with defects that may affect the integrity of the fin to tube attachment will be replaced.

5.3

All finned tubes shall be visually inspected prior to shipment to purchaser.  Fin tubes shall be free from injurious defects and have a workmanlike finish.

6.0

MARKING AND PACKAGING

6.1

Finned tubes shall be marked or tagged as specified by purchaser.  Where no specifications are provided by purchaser, marking shall be at the discretion of Vulcan.

6.2

Packaging shall be fully enclosed crate as specified by purchaser.  Export quality crating can also be provided upon request.