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How to make Seamless hydraulic tube
The tubes surface finishing is NBK, where the tubes are phosphate and normalized which provides corrosion resistance. It is oiled inside and outside. Normalize process creates tougher metal product. During normalizing, metals will be heated at a high temperature, and it allowed to naturally cool back down to room temperature by exposure after heating. Metals that have been through this process are more formable, harder and ductile.
Seamless hydraulic tube (ST37.4 NBK) Working Pressure Table:
No. | Description | Working Pressure (Bar) | Burst Pressure (Bar) | IMPA CODE |
1 | 4MM OD x 1.0MM THK x 6 MTR | 707 | 1755 | 710701 |
2 | 5MM OD x 1.0MM THK x 6 MTR | 565 | 1404 | - |
3 | 6MM OD x 1.0MM THK x 6 MTR | 471 | 1170 | 710702 |
4 | 6MM OD x 1.5MM THK x 6 MTR | 707 | 1755 | 710703 |
5 | 8MM OD x 1.0MM THK x 6 MTR | 353 | 878 | 710704 |
6 | 8MM OD x 1.5MM THK x 6 MTR | 530 | 1316 | 710705 |
7 | 8MM OD x 2.0MM THK x 6 MTR | 707 | 1755 | 710706 |
8 | 8MM OD x 2.5MM THK x 6 MTR | 883 | 2194 | - |
9 | 10MM OD x 1.0MM THK x 6 MTR | 283 | 702 | 710707 |
10 | 10MM OD x 1.2MM THK x 6 MTR | 339 | 845 | 710708 |
11 | 10MM OD x 1.5MM THK x 6 MTR | 424 | 1053 | 710709 |
12 | 10MM OD x 2.0MM THK x 6 MTR | 565 | 1404 | 710710 |
13 | 10MM OD x 2.5MM THK x 6 MTR | 707 | 1755 | - |
14 | 12MM OD x 1.0MM THK x 6 MTR | 236 | 585 | 710711 |
15 | 12MM OD x 1.2MM THK x 6 MTR | 283 | 702 | 710712 |
16 | 12MM OD x 1.5MM THK x 6 MTR | 353 | 878 | 710713 |
17 | 12MM OD x 2.0MM THK x 6 MTR | 471 | 1170 | 710714 |
18 | 12MM OD x 2.5MM THK x 6 MTR | 589 | 1463 | - |
19 | 12MM OD x 3.0MM THK x 6 MTR | 707 | 1755 | - |
20 | 14MM OD x 1.5MM THK x 6 MTR | 303 | 752 | - |
21 | 14MM OD x 2.0MM THK x 6 MTR | 404 | 1003 | - |
22 | 14MM OD x 2.5MM THK x 6 MTR | 505 | 1254 | - |
23 | 14MM OD x 3.0MM THK x 6 MTR | 606 | 1504 | - |
24 | 14MM OD x 4.0MM THK x 6 MTR | 807 | 2006 | - |
25 | 15MM OD x 1.0MM THK x 6 MTR | 188 | 468 | - |
26 | 15MM OD x 1.2MM THK x 6 MTR | 226 | 562 | 710715 |
27 | 15MM OD x 1.5MM THK x 6 MTR | 283 | 702 | 710716 |
28 | 15MM OD x 2.0MM THK x 6 MTR | 377 | 936 | 710717 |
29 | 15MM OD x 2.5MM THK x 6 MTR | 471 | 1170 | 710718 |
30 | 15MM OD x 3.0MM THK x 6 MTR | 565 | 1404 | - |
31 | 16MM OD x 1.5MM THK x 6 MTR | 265 | 658 | 710719 |
32 | 16MM OD x 2.0MM THK x 6 MTR | 353 | 878 | 710720 |
33 | 16MM OD x 3.0MM THK x 6 MTR | 530 | 1316 | - |
34 | 18MM OD x 1.5MM THK x 6 MTR | 236 | 585 | 710721 |
35 | 18MM OD x 2.0MM THK x 6 MTR | 314 | 780 | 710722 |
36 | 18MM OD x 2.5MM THK x 6 MTR | 393 | 975 | 710723 |
37 | 18MM OD x 3.0MM THK x 6 MTR | 471 | 1170 | - |
38 | 20MM OD x 2.0MM THK x 6 MTR | 283 | 702 | 710724 |
39 | 20MM OD x 2.5MM THK x 6 MTR | 353 | 878 | 710725 |
40 | 20MM OD x 3.0MM THK x 6 MTR | 424 | 1053 | 710726 |
41 | 20MM OD x 3.5MM THK x 6 MTR | 495 | 1229 | - |
42 | 20MM OD x 4.0MM THK x 6 MTR | 565 | 1404 | - |
No. | Description | Working Pressure (Bar) | Burst Pressure (Bar) | IMPA CODE |
43 | 20MM OD x 4.5MM THK x 6 MTR | 636 | 1580 | - |
44 | 20MM OD x 5.0MM THK x 6 MTR | 707 | 1755 | - |
45 | 22MM OD x 2.0MM THK x 6 MTR | 257 | 638 | 710727 |
46 | 22MM OD x 2.5MM THK x 6 MTR | 321 | 798 | - |
47 | 22MM OD x 3.0MM THK x 6 MTR | 385 | 957 | 710728 |
48 | 22MM OD x 4.0MM THK x 6 MTR | 514 | 1276 | - |
49 | 25MM OD x 2.0MM THK x 6 MTR | 226 | 562 | 710729 |
50 | 25MM OD x 2.5MM THK x 6 MTR | 283 | 702 | 710730 |
51 | 25MM OD x 3.0MM THK x 6 MTR | 339 | 842 | 710731 |
52 | 25MM OD x 3.5MM THK x 6 MTR | 396 | 983 | - |
53 | 25MM OD x 4.0MM THK x 6 MTR | 452 | 1123 | - |
54 | 25MM OD x 5.0MM THK x 6 MTR | 565 | 1404 | - |
55 | 28MM OD x 2.0MM THK x 6 MTR | 202 | 501 | - |
56 | 28MM OD x 2.5MM THK x 6 MTR | 252 | 627 | 710732 |
57 | 28MM OD x 3.0MM THK x 6 MTR | 303 | 752 | - |
58 | 28MM OD x 4.0MM THK x 3 MTR | 404 | 1003 | - |
59 | 28MM OD x 5.0MM THK x 6 MTR | 505 | 1254 | - |
60 | 30MM OD x 2.0MM THK x 6 MTR | 188 | 468 | - |
61 | 30MM OD x 2.5MM THK x 6 MTR | 236 | 585 | 710733 |
62 | 30MM OD x 3.0MM THK x 6 MTR | 283 | 702 | - |
63 | 30MM OD x 4.0MM THK x 6 MTR | 377 | 936 | - |
64 | 30MM OD x 5.0MM THK x 6 MTR | 471 | 1170 | - |
65 | 35MM OD x 2.0MM THK x 6 MTR | 161 | 401 | - |
66 | 35MM OD x 2.5MM THK x 6 MTR | 202 | 501 | 710734 |
67 | 35MM OD x 3.0MM THK x 6 MTR | 242 | 602 | - |
68 | 35MM OD x 4.0MM THK x 6 MTR | 323 | 802 | 710735 |
69 | 35MM OD x 5.0MM THK x 6 MTR | 404 | 1003 | - |
70 | 38MM OD x 3.0MM THK x 6 MTR | 223 | 554 | - |
71 | 38MM OD x 4.0MM THK x 6 MTR | 297 | 739 | - |
72 | 38MM OD x 5.0MM THK x 6 MTR | 372 | 924 | - |
73 | 42MM OD x 2.0MM THK x 6 MTR | 135 | 334 | - |
74 | 42MM OD x 3.0MM THK x 6 MTR | 202 | 501 | - |
75 | 42MM OD x 4.0MM THK x 6 MTR | 269 | 669 | 710736 |
76 | 42MM OD x 5.0MM THK x 6 MTR | 336 | 836 | - |
77 | 50MM OD x 3.0MM THK x 6 MTR | 170 | 421 | - |
78 | 50MM OD x 5.0MM THK x 6 MTR | 283 | 702 | - |
79 | 60MM OD x 3.0MM THK x 6 MTR | 141 | 351 | - |
80 | 60MM OD x 5.0MM THK x 6 MTR | 236 | 585 | - |
81 | 65MM OD x 6.0MM THK x 6 MTR | 261 | 648 | - |
82 | 75MM OD x 3.0MM THK x 6 MTR | 113 | 281 | - |
83 | 1/8"NB x 2.41MM THK x 6 MTR | 649 | 1611 | - |
84 | 1/4"NB x 3.02MM THK x 6 MTR | 618 | 1536 | - |
No. | Description | Working Pressure (Bar) | Burst Pressure (Bar) | IMPA CODE |
85 | 3/8"NB x 3.2MM THK x 6 MTR | 523 | 1298 | - |
86 | 1/2"NB x 3.0MM THK x 6 MTR | 391 | 971 | - |
87 | 3/4"NB x 3.0MM THK x 6 MTR | 312 | 774 | - |
88 | 1"NB x 3.5MM THK x 6 MTR | 291 | 723 | - |
89 | 1"NB x 4.55MM THK x 6 MTR | 378 | 939 | - |
90 | 1 1/4"NB x 4.85MM THK x 6 MTR | 321 | 797 | - |
91 | 1 1/2"NB x 5.08MM THK x 6 MTR | 295 | 734 | - |
92 | 2 1/2"NB x 6.3MM THK x 6 MTR | NIL | 580 | - |
93 | 1/4"OD x 1.2MM THK x 6 MTR | 534 | 1327 | - |
94 | 1/4"OD x 1.5MM THK x 6 MTR | 668 | 1658 | - |
95 | 3/8"OD x 1.22MM THK x 6 MTR | 362 | 899 | - |
96 | 3/8"OD x 1.5MM THK x 6 MTR | 445 | 1105 | - |
97 | 1/2"OD x 1.5MM THK x 6 MTR | 334 | 829 | - |
98 | 3/4"OD x 2.0MM THK x 6 MTR | 297 | 737 | - |
99 | 3/4"OD x 2.64MM THK x 6 MTR | 392 | 973 | - |
100 | 1"OD x 3.0MM THK x 6 MTR | 334 | 829 | - |
101 | 1 1/4"OD x 3.0MM THK x 6 MTR | 267 | 663 | - |
102 | 1 1/4"OD x 3.25MM THK x 6 MTR | 289 | 719 | - |
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