国外阀门材料常用技术标准 低温用合金钢与不锈钢栓接材料、毛坯零件所推荐的试验温度
| 牌号 | 试验温度 | |
| ° F | ° C | |
| L7M、L70、L71、L72、L73 | -100 | -73 |
| L7、L7A、L7B、L7C | -150 | -101 |
| L43 | -150 | -101 |
| L1 | -100 | -73 |
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