Pipe Tube For Ship
Marine pipes are used in the manufacture of seamless steel pipes for marine boilers and superheaters and grade I and II pressure piping systems.
Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of pipe tube for ship in China, also supports customized service with low price. Welcome to wholesale discount pipe tube for ship for sale here from our factory. Contact us for free sample.
The full name of marine pipe is ship pipe. Its main purpose is for shipbuilding. Compared with other seamless steel pipes (such as 20# seamless steel pipe, 45# seamless steel pipe), the performance of ship pipe is quite high in corrosion resistance. performance, high pressure resistance and high temperature resistance. The main materials of ship pipes are 410, 490 and 440. The implementation standard is: GB/T5312-1999 (hot rolling, extrusion, pipe expansion). The common specification range is: 14-426*1.5-60.
Ship Pipe Dimensional Tolerance
|
Type |
O.D. |
Steel Pipe Wall Thickness (S) |
- |
|
| Cold Drawn Tube | Steel Pipe Outer Diameter (mm) | Allowed Deviation (mm) | Steel Pipe Wall Thickness (mm) | Allowed Deviation (mm) |
|
>30～50 |
±0.3 |
≤30 |
±10% |
- |
|
>50～219 |
±0.8% |
- |
||
| Hot Rolled Pipe |
>219 |
±1.0% |
>20 |
±10% |
Marine Seamless Steel Pipe Mechanical Properties
| standard | Steel grade | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
|
GB/T5312 |
320 |
320～410 |
≥195 |
≥25 |
|
360 |
360～480 |
≥215 |
≥24 |
- |
|
410 |
410～530 |
≥235 |
≥22 |
|
|
460 |
460～580 |
≥265 |
≥21 |
|
|
490 |
490～610 |
≥285 |
≥21 |
Seamless steel tube and pipe for ship building usage and Chemical compisition(%)
| Society | Standard or usage | Steel grade | C | Si | Mn | P | S | Cr | Ni | Cu | Al | Mo | V | P+S |
| GLR | Non alloly | GL-R 410 | ≤0.21 | ≤0.35 | ≤1.4 | ≤0.025 | ≤0.02 | - | - | - | ≥0.020 | - | - | - |
| GB 18248 | 37Mn | 0.34~0.40 | 0.1~0.30 | 1.35~1.65 | ≤0.03 | ≤0.03 | ≤0.3 | ≤0.3 | ≤0.2 | - | - | - | ≤0.055 | |
| EN 10297 | 34CrMo4 | 0.3~0.37 | ≤0.4 | 0.6~0.90 | ≤0.035 | ≤0.035 | 0.9~1.20 | - | - | - | 0.15~0.30 | - | - | |
| DNV | for pressure ASTM A53/A53M | A53B | ≤0.3 | - | ≤1.2 | ≤0.05 | ≤0.045 | ≤0.4 | ≤0.4 | ≤0.4 | - | ≤ | ≤ | - |
| 0.15 | 0.08 | |||||||||||||
| ABS | for pressure | Grade 3 | ≤0.3 | - | ≤1.2 | ≤0.05 | ≤0.045 | ≤0.4 | ≤0.4 | ≤0.4 | - | ≤0.15 | ≤0.08 | - |
| BV | for pressure | 410HB | ≤0.21 | ≤0.35 | 0.4~1.20 | ≤0.04 | ≤0.04 | - | - | - | - | - | - | - |
| LR | for pressure | 410 | ≤0.21 | ≤0.35 | 0.4~1.20 | ≤0.045 | ≤0.045 | ≤0.25 | ≤0.3 | ≤0.3 | - | ≤ | - | - |
| KR | for pressure | RST138 | ≤0.25 | ≤0.35 | 0.3~0.90 | ≤0.04 | ≤0.04 | - | - | - | - | - | - | - |
| RST142 | ≤0.3 | 0.3~1.00 | ≤0.04 | ≤0.04 | - | - | - | - | - | - | - | |||
| RST238 | ≤0.25 | 0.1~0.35 | 0.3~1.10 | ≤0.035 | ≤0.035 | - | - | - | - | - | - | - | ||
| RST242 | ≤0.3 | 0.3~1.40 | - | - | - | - | - | - | - | |||||
| RST249 | ≤0.33 | 0.3~1.50 | - | - | - | - | - | - | - | |||||
| RST338 | ≤0.25 | 0.3~0.90 | - | - | - | - | - | - | - | |||||
| RST342 | ≤0.3 | 0.3~1.00 | - | - | - | - | - | - | - | |||||
| NK | for pressure | grade 1 No3/ KSTPG 42 | ≤0.3 | ≤0.35 | 0.3~1.00 | ≤0.04 | ≤0.04 | - | - | - | - | - | - | - |
| CCS | for pressure | 360 | ≤0.17 | ≤0.35 | 0.4~0.80 | ≤0.04 | ≤0.04 | ≤0.25 | ≤0.3 | ≤0.3 | ≤0.10 | |||
| 410 | ≤0.21 | ≤0.35 | 0.4~1.20 | ≤0.04 | ≤0.04 | ≤0.25 | ≤0.3 | ≤0.3 | ≤0.10 | |||||
| 460 | ≤0.22 | ≤0.35 | 0.8~1.40 | ≤0.04 | ≤0.04 | ≤0.25 | ≤0.3 | ≤0.3 | ≤0.10 | |||||
| 490 | ≤0.23 | ≤0.35 | 0.8~1.50 | ≤0.04 | ≤0.04 | ≤0.25 | ≤0.3 | ≤0.3 | ≤0.1 |
GNEE Seamless Pipe for Ships
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