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Product Description
Hydraulic Tube Steel Pipe
Hydraulic piping systems can be divided into two types: non-welded and welded. The main connectors in non-welded connections are flanges and joints. Flanges are divided into welded and non-welded (HS flange system). The range of joints includes: ferrule joints, HS extruded pipe end forming, JIC37° flared joints, etc. In addition, the range of pipe materials used in hydraulic piping systems is very wide: from carbon steel to stainless steel, from hot-rolled to cold-drawn (seamless) precision steel pipes, etc.
Considering the high requirements of the hydraulic system for cleanliness, quality and reliability within the system, we recommend:
* The entire hydraulic piping system uses welding connection technology
* The steel pipe uses seamless precision carbon steel pipes and (or) austenitic stainless steel pipes.
* The steel pipe with a diameter greater than 42mm adopts a flared flange connection system.
* The steel pipe with a diameter less than 42mm adopts the most advanced HS pipe end extrusion joint connection (select according to the specific application).
This technical information is the general principle in the design of hydraulic piping systems. In the specific piping system design, please choose according to the environment, customer's technical requirements, and local actual conditions.
DIN 2413/I and DIN 2413/III Steel pipe
All working pressures are based on DIN 2413/I and DIN 2413/III for straight tubes and pipes.
The yield point and tensile stress value determine the maximum allowable working pressure and the required wall thickness.
DNV Rules
All working pressures are based on Det Norske Veritas rules for classification of ships, new building part 4, Chapter 1, Section 6 and mobile offshore units drilling plant (drill) Part 6, chapter 5, Section 6 for bent tubes and pipes.
Before delivery, the actual yield point and tensile stress values are confirmed on the material certificate.
Models & Specifications
| Part No | O.D.XW.T | WP.bar | B.P.bar | kg/m | |||||
| DNV | 2 DIN 2413 I | 3 DIN 2413Ⅲ | 4 DIN 2413 I | ||||||
| 4X1 ST37.4NBK 6X1 ST37.4NBK | 4x1.0 6x1.0 | 397 252 | 707 471 | 555 394 | 1755 1170 | 0.05 0.07 | |||
| 6X1.5ST37.4NBK 6X2ST37.4NBK | 6×1.5 6x2.0 | 475 736 | 707 942 | 555 697 | 1755 2340 | 0.17 0.19 | |||
| 8X1 ST37.4NBK 8X1.5ST37.4NBK | 8×1.0 8x1.5 | 184 341 | 353 530 | 305 436 | 878 1316 | 0.17 0.24 | |||
| 8X2ST37.4NBK 8X2.5ST37.4NBK | 8×2.0 8×2.5 | 515 712 | 707 883 | 555 663 | 1755 2194 | 0.30 0.34 | |||
| 10X1 ST37.4NBK 10X1.5ST37.4NBK | 10×1.0 10x1.5 | 145 265 | 283 424 | 249 359 | 702 1053 | 0.22 0.31 | |||
| 10X2ST37.4NBK 10X2.5ST37.4NBK | 10×2.0 10×2.5 | 397 540 | 565 707 | 461 555 | 1404 1755 | 0.40 0.46 | |||
| 12X1.5ST37.4NBK 12X2ST37.4NBK | 12×1.5 12×2.0 | 218 322 | 353 471 | 305 394 | 878 1170 | 0.39 0.49 | |||
| 12X2.5ST37.4NBK 14X1.5ST37.4NBK | 12x2.5 14×1.5 | 435 184 | 589 303 | 477 266 | 1463 752 | 0.59 0.46 | |||
| 14X2ST37.4NBK 15X1.5ST37.4NBK | 14×2.0 15x1.5 | 271 171 | 404 283 | 344 249 | 1003 702 | 0.59 0.50 | |||
| 15X2ST37.4NBK 16X1.5ST37.4NBK | 15×2.0 16×1.5 | 252 160 | 377 265 | 324 235 | 936 658 | 0.64 0.54 | |||
| 16X2ST37.4NBK 16X2.5ST37.4NBK | 16×2.0 16×2.5 | 234 313 | 353 442 | 305 372 | 878 1097 | 0.69 0.83 | |||
| 16X3ST37.4NBK i8X1.5ST37.4NBK | 16×3.0 18x1.5 | 397 141 | 530 236 | 436 211 | 1316 585 | 0.96 0.61 | |||
| 18X2ST37.4NBK 20X2ST37.4NBK | 18×2.0 20x2.0 | 206 184 | 314 283 | 275 249 | 780 702 | 0.79 0.89 | |||
| 20X2.5ST37.4NBK 20X3ST37.4NBK | 20×2.5 20×3.0 | 245 308 | 353 424 | 305 359 | 878 1052 | 1.08 1.26 | |||
| 20X4ST37.4NBK 22X1.5ST37.4NBK | 20x4.0 22×1.5 | 443 114 | 565 193 | 461 175 | 1404 479 | 1.58 0.76 | |||
| 22X2ST37.4NBK 22X2.5ST37.4NBK | 22x2.0 22×2.5 | 166 221 | 257 321 | 228 280 | 638 798 | 0.99 1.09 | |||
| 25X2ST37.4NBK 25X2.5ST37.4NBK | 25×2.0 25×2.5 | 145 192 | 226 283 | 203 249 | 562 702 | 1.13 1.39 | |||
| 25X3ST37.4NBK 25X4ST37.4NBK | 25×3.0 25×4.0 | 241 343 | 339 452 | 294 380 | 842 1123 | 1.63 | |||
| 28X2ST37.4NBK 28X2.5ST37.4NBK | 28x2.0 28×2.5 | 129 170 | 202 252 | 182 225 | 501 627 | 1.28 1.57 | ||
| 28X3ST37.4NBK 30X2ST37.4NBK | 28x3.0 30×2.0 | 213 120 | 303 188 | 266 171 | 752 468 | 1.85 1.38 | ||
| 30X3ST37.4NBK 30X4ST37.4NBK | 30x3.0 30x4.0 | 197 279 | 283 377 | 249 324 | 702 936 | 2.00 2.56 | ||
| 35X2ST37.4NBK 35X3ST37.4NBK | 35x2.0 35x3.0 | 102 167 | 161 242 | 148 216 | 401 602 | 1.63 2.37 | ||
| 38X2.5ST37.4NBK 38X3ST37.4NBK | 38x2.5 38×3.0 | 123 153 | 186 223 | 169 200 | 462 554 | 2.19 2.59 | ||
| 38X4ST37.4NBK 38X5ST37.4NBK | 38×4.0 38x5.0 | 216 281 | 297 372 | 261 320 | 739 924 | 3.35 4.07 | ||
| 38X6ST37.4NBK 42X2ST37.4NBK | 38x6.0 42×2.0 | 349 85 | 446 135 | 376 124 | 1108 334 | 4.74 1.97 | ||
| 42X3ST37.4NBK 42X4ST37.4NBK | 42x3.0 42×4.0 | 138 194 | 202 269 | 182 238 | 501 669 | 2.89 3.75 | ||
| 50X3ST37.4NBK 60X3ST37.4NBK | 50×3.0 60x3.0 | 115 95 | 170 141 | 155 130 | 421 351 | 3.48 4.22 | ||
| 75X3ST37.4NBK 90X3.5ST37.4NBK | 75x3.0 90×3.5 | 76 75 | 113 110 | 105 102 | 281 273 | 5.32 7.47 | ||
| 100X4ST37.4NBK 115X4ST37.4NBK | 100×4.0 115x4.0 | 78 68 | 113 98 | 105 92 | 281 244 | 9.47 10.98 | ||
| 140X4.5ST37.4NBK 165X5ST37.4NBK | 140×4.5 165x5.0 | 63 60 | 91 86 | 85 80 | 226 213 | 15.04 19.73 | ||
| 220X6ST37.4NBK 273X6ST37.4NBK | 220×6.0 273x6.0 | 54 44 | 77 62 | 72 59 | 191 154 | 31.66 39.41 | ||
1 DNV: Bended pipe including manufacturing and corrosion tolerances.
2 DIN 2413 I static straight pipe including manufacturing tolerance.
3 DIN 2413III dynamic straight pipe including manufacturing tolerance.
4 Burst pressure according to DIN 2413 I including manufacturing tolerance.
