Seamless steel tubes for low-temperature service
Low temperature service seamless pipes are application for low-temperature pressure container piping by the main standard GB/T18984-2003, ASTM/ASME A/SA333 with steel grade 16MnDG, 10MnDG, A333 Gr.1, Gr.3, Gr.6
Sunny Steel offer an extensive range of Seamless steel pipes for low temperature sevice.
GB/T18984-2003 standard suitable for -49 to -148 degrees F cryogenic pressure vessel piping, and low-temperature heat exchanger tubes seamless steel pipe.
ASTM/ASME A/SA-333 Grades allow for cold temperature service to minus 150 degrees F. Material is always provided in the normalized condition at a minimum and Charpy Impact tested to a specific temperature range to assure compliance with the required service temperature.
Low Temperature Steel Pipe Specifications & Grades
- ASTM A333 Low Temperature Pipe
- SA333 & A333 – Grades 1, 3, & 6
- Seamless steel tubes for low-temperature service
- A333-6 low temperature steel pipe welding
- GB/T18984 Low-temperature heat exchanger tubes
- Welding method of low carbon steel at a low temperature
- Low and medium pressure boiler pipe
Chemical Composition(%)
| Grade | C | Si | Mn | P(max) | S | Ni | Mo | V |
| 16MnDG | 0.12-0.20 | 0.20-0.55 | 1.20-1.60 | 0.025 | 0.025 | - | - | - |
| 10MnDG | <=0.13 | 0.17-0.37 | <=1.35 | 0.025 | 0.025 | - | - | <=0.07 |
| A333 Gr.1 | <=0.30 | - | 0.40-1.06 | 0.025 | 0.025 | - | - | - |
| A333 Gr.3 | <=0.19 | 0.18-0.37 | 0.31-0.64 | 0.025 | 0.025 | 3.18-3.82 | - | <=0.12 |
| A333 Gr.6 | <=0.30 | >=0.10 | 0.29-1.06 | 0.025 | 0.025 | - | - | - |
Mechanical Properties
| Grade | Tensile strength | Lower yield strength（Rcl/Mpa） | Elongation | |
| Rm/Mpa | W.T.<=16mm | W.T.>16mm | A/% | |
| 16MnDG | 490-665 | >=325 | >=315 | >=30 |
| 10MnDG | >=400 | >=240 | >=35 | |
| A333 Gr.1 | >=205 | >=380 | >=35 | |
| A333 Gr.3 | >=450 | >=240 | >=30 | |
| A333 Gr.6 | >=455 | >=250 | >=30 | |
Available Sizes:
- O.D.: from 3/4 to 20 inch
- W.T.: 0.102 to 4inch (2.6 to 100 mm)
- Length: max 16000mm
Marking:
- Pipes are supplied with marking according to standard and customer request.
- Marking is paint on the ends of pipes.
- The same data, as well as additional information per customer’s request, is indicated on the bundle’s tags.
Delivery:
- Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
- Weight of bundle – up to 5000 kg upon request of customer.
- Each bundle is furnished with three tags.
