Firetube Boiler Flaring Tube Expanders

KRAIS Tube Expanders

Key Features

Three expansion rolls and three flare rolls, self feeding tube expanders with adjustable thrust collar for friction free operation and long tool life, as well as allow to adjust the flare length. This expander will simultaneously expand and flare the tube. Adjustable collar allows consistent flare length. An excel- lent expander for re-rolling a leaky tubes and for new constructions of Water Tube Boilers, Fire Tube Boilers, Economizers, Air Heaters. Expanders with 6 rolling rolls and 3 flare rolls are available on request.

Our K70‘s right-angle rolling motors are recommended to be used with this expanders.
Refer to page AK50 Automatic Rolling Motor

Parameters

Tube OD: 2 inch (50,8 mm)

TUBE GAUGE TOOL NO. MIN. EXP. OF TOOL MAX. EXP. OF TOOL ROOLS SET NO. MANDREL NO. MANDREL SQUARE SHORT MANDREL SET
[bwg] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm]
10 0,134 3,40 FTKS-508 1,653 41,99 1,889 47,98 RR23RK11 TF-42 3/4 19 TFKK-42
12 0,109 2,77 FTKS-508 1,653 41,99 1,889 47,98 RR23RK11 TF-42 3/4 19 TFKK-42
14 0,083 2,11 FTKS-508 1,653 41,99 1,889 47,98 RR23RK11 TF-42 3/4 19 TFKK-42

Tube OD: 2-1/2 inch (63,5 mm)

TUBE GAUGE TOOL NO. MIN. EXP. OF TOOL MAX. EXP. OF TOOL ROOLS SET NO. MANDREL NO. MANDREL SQUARE SHORT MANDREL SET
[bwg] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm]
10 0,134 3,40 FTKS-635 2,125 53,98 2,440 61,98 RR25RK14 TF-54 3/4 19 TFKK-54
12 0,109 2,77 FTKS-635 2,125 53,98 2,440 61,98 RR25RK14 TF-54 3/4 19 TFKK-54
14 0,083 2,11 FTKS-635 2,125 53,98 2,440 61,98 RR25RK14 TF-54 3/4 19 TFKK-54

Tube OD: 3 inch (76,2 mm)

TUBE GAUGE TOOL NO. MIN. EXP. OF TOOL MAX. EXP. OF TOOL ROOLS SET NO. MANDREL NO. MANDREL SQUARE SHORT MANDREL SET
[bwg] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm]
10 0,134 3,40 FTKS-762 2,559 65,00 2,952 74,98 RR29RK17 TF-65 3/4 19 TFKK-65
12 0,109 2,77 FTKS-762 2,559 65,00 2,952 74,98 RR29RK17 TF-65 3/4 19 TFKK-65
14 0,083 2,11 FTKS-762 2,559 65,00 2,952 74,98 RR29RK17 TF-65 3/4 19 TFKK-65

Other sizes and other roll length available on request.