Nominal pressure | 1.0 | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 |
Nominal diameter | DN40～DN700 | |||||
Working pressure (MPa) | ≤1.0 | ≤1.6 | ≤2.5 | ≤4.0 | ≤6.4 | ≤10.0 |
Strength test (MPa) | 2.0 | 2.4 | 3.75 | 6.0 | 9.6 | 15.0 |
Sealing test (MPa) | 1.1 | 1.76 | 2.75 | 4.4 | 7.1 | 11.0 |
Working medium | Water, oil, natural gas, etc | |||||
Operating temperature | -29～121℃ 250℃ 425℃ | |||||
For oil and natural gas transmission pipelines, single or double ram flat gate valves shall be selected. If it is necessary to clean the pipeline, single or double ram rising stem flat gate valves with diversion holes shall be selected. The transmission pipeline and storage equipment for product oil shall be flat gate valves with single or double gates without diversion holes. "For wellhead devices for oil and natural gas production, single or double ram flat gate valves with non rising stem floating valve seats and diversion holes are selected, most of which comply with the API 16A standard and have pressure ratings of API 2000, API 3000, API 5000, API 10000, API 15000, and API 20000.". For pipes with suspended particle media, knife type flat gate valves are selected. 5. For urban gas transmission pipelines, single or double gate soft sealing rising stem flat gate valves shall be selected. 6. For urban water works, single or double gate open stem flat gate valves without diversion holes are selected.
Nominal pressure | 1.0 | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 |
Nominal diameter | DN40～DN700 | |||||
Working pressure (MPa) | ≤1.0 | ≤1.6 | ≤2.5 | ≤4.0 | ≤6.4 | ≤10.0 |
Strength test (MPa) | 2.0 | 2.4 | 3.75 | 6.0 | 9.6 | 15.0 |
Sealing test (MPa) | 1.1 | 1.76 | 2.75 | 4.4 | 7.1 | 11.0 |
Working medium | Water, oil, natural gas, etc | |||||
Operating temperature | -29～121℃ 250℃ 425℃ | |||||
For oil and natural gas transmission pipelines, single or double ram flat gate valves shall be selected. If it is necessary to clean the pipeline, single or double ram rising stem flat gate valves with diversion holes shall be selected. The transmission pipeline and storage equipment for product oil shall be flat gate valves with single or double gates without diversion holes. "For wellhead devices for oil and natural gas production, single or double ram flat gate valves with non rising stem floating valve seats and diversion holes are selected, most of which comply with the API 16A standard and have pressure ratings of API 2000, API 3000, API 5000, API 10000, API 15000, and API 20000.". For pipes with suspended particle media, knife type flat gate valves are selected. 5. For urban gas transmission pipelines, single or double gate soft sealing rising stem flat gate valves shall be selected. 6. For urban water works, single or double gate open stem flat gate valves without diversion holes are selected.
