| 1 | What standard applies to SAW pipe for oil and gas? | API Specification 5L and GB/T 9711 are primary standards-3. |
| 2 | What is the purpose of the pipe end expansion process? | It improves the roundness of the pipe ends, ensuring better fit-up for field welding-3. |
These pipes are designed to maintain toughness in cold environments.
| No. | Question | Answer (with Key Grades/Standards) |
|---|---|---|
| 3 | Which standard covers welded steel pipe for low-temperature service? | ASTM A333/A333M covers seamless and welded steel pipe for low-temperature service requiring notch toughness-4. |
| 4 | What is a critical property for low-temperature pipe? | Notch toughness (impact energy absorption) at the designated minimum service temperature to prevent brittle fracture-4. |
| 5 | Are all wall thicknesses available for low-temperature grades? | No. Heavier wall thicknesses can adversely impact properties, so availability may be limited for some grades and sizes-4. |
