| Q1: What standard applies to seamless pipes for low and medium-pressure boilers? | GB 3087 specifies requirements for seamless carbon steel pipes used in low and medium-pressure boilers -3. |
| | Q2: What is the key Chinese standard for high-pressure boiler tubes? | GB 5310 is the standard for seamless tubes used in high-pressure and above-pressure water-tube boilers. It covers carbon, alloy, and stainless heat-resistant steel grades -3-4. |
| | Q3: What does the ASTM A333 standard specify? | ASTM A333/A333M covers seamless and welded steel pipe for low-temperature service. It includes several grades of ferritic steel that require specific notch toughness (impact resistance) at low temperatures -7. |
| | Q4: What is the scope of the GB/T 5312 standard? | GB/T 5312 specifies requirements for seamless steel tubes and pipes for ships, used in pressure piping systems, boilers, and superheaters. It covers carbon, carbon-manganese, alloy, and stainless steels. The latest edition is GB/T 5312-2025 -1-8. |
| | Q5: What standard is for petroleum cracking pipes? | GB 9948 is for seamless pipes used in petroleum refining facilities for furnace tubes, heat exchangers, and pipelines -3. |
