High-pressure pipes

Flexible solutions to connect oil injection equipment

The range of SKF High-pressure Pipes can be used when SKF Oil Injection equipment cannot be connected directly to a pressure joint. They consist of a steel pipe with a steel ball fitted to both ends. Two swivelling connection nipples press these balls against the seating of the connecting hole and thus sealing against oil leakage.
  • Wide range of pipes
  • All pipes are pressure tested during production
  • Special lengths (up to 4 000 mm / 157 in) made on request

Safety note

For safety reasons, these high–pressure pipes have a maximum service life. All SKF High-pressure Pipes are hard–marked with the year in which their service life expires e.g. Do no use after 2021.

High pressure pipes are marked with their maximum working pressure e.g. MAX 400MPa.

The pipe colour also indicates the maximum working pressure. Black pipes can be used up to 300 MPa, whilst grey pipes can be used up to 400 MPa.
Technical specifications
Maximum working pressure
300 MPa (43 500 psi)
Test quantity
100%
Outer pipe diameter
4 mm (0.16 in.)
Inner pipe diameter
1,6 mm (0.06 in.)
Pipe minimum bending radius100 mm (4 in.)
Pipe lengths
between 300 mm (12 in.) and 4 000 mm (118 in.) can be ordered e.g. 227957A/3000 (3 000 mm long)
Technical data (metric)
Designation
Dimensions

G
G1
A
A1



mm
mm
721740 A
G 1/8
G 3/4
11,5
36,9
227957 A*
G 1/4
G 3/4
17,3
36,9
227958 A*
G 3/4
G 3/4
36,9
36,9
1020612 A**
G 1/4
G 1/4
17,3
17,3
728017 A
G 1/4
G 1/4
17,3
17,3
Dw
Dw1
L
Weight
mm
mm
mm
kg
721740 A
7,9415,88
1.000
0,3
227957 A*
11,1115,882.000
0,4
227958 A*
15,8815,882.000
0,6
1020612 A**
11,1111,11
1.000
0,5
728017 A
11,11 7,94300
0,2
* These pipes are also available in a 400 MPa execution. Designations are 227957 A/400MP and 227958 A/400MP. Outer diameter of the pipe is 6 mm (0.24 in.)
** Maximum working pressure 400 MPa (58 000 psi). Outer diameter of the pipe 6 mm (0.24 in.).
High pressure pipe
Technical data (imperial)
Designation
Dimensions

G
G1
A
A1



in
in
721740 A
G 1/8
G 3/4
0.45
1.45
227957 A*
G 1/4
G 3/4
0.68
1.45
227958 A*
G 3/4
G 3/4
1.45
1.45
1020612 A**
G 1/4
G 1/4
0.68
0.68
728017 A
G 1/4
G 1/4
0.68
0.68
Dw
Dw1
L
Weight
in
in
in
lb
721740 A
0.310.6339
0.7
227957 A*
0.440.6378
0.9
227958 A*
0.630.6378
1.3
1020612 A**
0.44
0.44
39
1.1
728017 A
0.440.3112
0.4
* These pipes are also available in a 400 MPa execution. Designations are 227957 A/400MP and 227958 A/400MP. Outer diameter of the pipe is 6 mm (0.24 in.)
** Maximum working pressure 400 MPa (58 000 psi). Outer diameter of the pipe 6 mm (0.24 in.).
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