ASTM A333 Seamless Pipe Production Process
1. Preparation and inspection of tube billet: select the tube billet that meets the standard, and conduct a comprehensive quality inspection. Factories need to ensure that their chemical composition, physical properties, and appearance quality meet ASTM A333 seamless pipe manufacturing requirements.
2. Tube heating: the tube heating to the appropriate temperature to improve its plasticity and deformation capacity.
3. Perforation: Use the perforator to thread the heated tube billet into a capillary tube.
4. Tube rolling: through the rolling process, the tube is rolled into the required specifications of seamless steel pipe.
5. Heat treatment: Heat treatment of the rolled seamless steel pipe to control its microstructure and improve its mechanical properties and corrosion resistance. The heat treatment process usually includes normalizing, tempering and other processes.
6. Finishing and inspection: the seamless steel pipe after heat treatment is finished, including straightening, grinding and other processes to improve its surface quality and dimensional accuracy. At the same time, carry out comprehensive quality inspection, including non-destructive testing, physical and chemical inspection, etc., to ensure that product quality meets the standard requirements.
Performance Advantage
Low temperature toughness: ASTM A333 seamless tubing performs well in the low temperature range from -45 ° C to -195 ° C. It has good impact resistance and toughness to ensure that it can still work stably in extreme environments. Different grades of A333 seamless tubes have different minimum impact test temperatures. If Grade 1 is -45 ° C, Grade 3 and Grade 4 are -100 ° C, and Grade 8 can reach -195 ° C.
Corrosion resistance: made of corrosion-resistant materials, it can effectively resist the erosion of a variety of corrosive media. This can extend the service life of the pipeline and ensure the safety and reliability of the conveying system.
High strength and fracture toughness: After strict production process control, it has high strength and good fracture toughness. Therefore, this steel pipe can withstand greater pressure and mechanical load. Its tensile strength is usually not less than 380MPa, yield strength is not less than 205MPa.
Surface quality: Smooth surface reduces pressure loss inside the pipe. This improves delivery efficiency and is easy to clean and maintain.
Specifications of ASTM A333 Seamless Pipe
Standard: ASTM A333, ASME SA333
Size: 1/2’’ to 24’’, * size above 24’’ NPS can be arranged on request
Schedule: SCH 10, SCH 40, SCH 80, SCH 160 TO SCH XXS
as per ANSI B36.10/ ASME B36.10
Type: Seamless
Grade: Grade 1, Grade 3 And Grade 6
Chemical Requirements:
| Composition, % | |||
| Element | Grade 1 | Grade 3 | Grade 6 |
| Carbon, max | 0.30 | 0.19 | 0.30 |
| Manganese | 0.40 – 1.06 | 0.31 – 0.64 | 0.29 – 1.06 |
| Phosphorous, max | 0.025 | 0.025 | 0.025 |
| Sulfur, max | 0.025 | 0.025 | 0.025 |
| Silicon | 0.18 -0.37 | 0.10 min | |
| Nickel | 3.18 – 3.82 | ||
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