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4300 Catalog
General Technical
U21
Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
Dimensions and pressures for reference only, subject to change.
Metric Tube Pressure Ratings
Table U16 — Metric Tube Pressure Ratings
Metric Tubes
Tube
O.D.
(mm)
Wall
Thick.
(mm)
Tube
I.D.
(mm)
Static Design Pressure
(Bar)
Steel
Low-Carbon
St. 37-4
Stainless
Steel
1.4571
4
0.5
3.0
313
4
0.75 2.5
409
4
1.0
2.0
522
600
5
1.0
3.0
432
6
0.75 4.5
333
6
1.0
4.0
389
426
6
1.5
3.0
549
600
6
2.0
2.0
692
6
2.25 1.5
757
8
1.0
6.0
333
368
8
1.5
5.0
431
472
8
2.0
4.0
549
8
2.5
3.0
658
10
1.0
8.0
282
294
10
1.5
7.0
373
389
10
2.0
6.0
478
498
10
2.5
5.0
576
10
3.0
4.0
666
12
1.0 10.0
235
245
12
1.5
9.0
353
368
12
2.0
8.0
409
426
12
2.5
7.0
495
12
3.0
6.0
576
12
3.5
5.0
651
14
1.5 11.0
302
315
14
2.0 10.0
357
420
14
2.5
9.0
434
452
14
3.0
8.0
507
14
3.5
7.0
576
14
4.0
6.0
641
15
1.0 13.0
188
196
15
1.5 12.0
282
294
15
2.0 11.0
336
392
15
3.0
9.0
478
16
1.5 13.0
264
276
16
2.0 12.0
353
368
16
2.5 11.0
386
403
16
3.0 10.0
452
472
18
1.0 16.0
157
18
1.5 15.0
235
245
18
2.0 14.0
313
327
18
2.5 13.0
392
18
3.0 12.0
409
20
1.5 17.0
212
20
2.0 16.0
282
294
20
2.5 15.0
353
368
20
3.0 14.0
373
389
20
3.5 13.0
426
20
4.0 12.0
478
22
1.5 19.0
192
200
22
2.0 18.0
256
267
22
2.5 17.0
320
22
3.0 16.0
343
25
2.0 21.0
226
25
2.5 20.0
282
294
25
3.0 19.0
338
353
Metric Tubes
Tube
O.D.
(mm)
Wall
Thick.
(mm)
Tube
I.D.
(mm)
Static Design Pressure
(Bar)
Steel
Low-Carbon
St. 37-4
Stainless
Steel
1.4571
25
4.0 17.0
394
25
4.5 16.0
437
25
5.0 15.0
478
28
1.5 25.0
151
158
28
2.0 24.0
201
210
28
2.5 23.0
252
28
3.0 22.0
302
30
2.0 26.0
188
30
2.5 25.0
235
245
30
3.0 24.0
282
294
30
4.0 22.0
336
392
30
5.0 20.0
409
35
2.0 31.0
161
168
35
2.5 30.0
201
35
3.0 29.0
242
35
4.0 27.0
322
38
2.5 33.0
186
38
3.0 32.0
223
38
4.0 30.0
297
309
38
5.0 28.0
332
38
6.0 26.0
390
38
7.0 24.0
446
42
2.0 38.0
134
140
42
3.0 36.0
201
210
42
4.0 34.0
269
50
6.0 38.0
338
50
9.0 32.0
437
65
8.0 49.0
347