通用阀门材料 美标阀门用螺栓、螺母材料配对
螺栓 | 螺母 | 适用范围 | ||
标准 | 牌号 | 标准 | 牌号 | |
ASTM A 193 | B7 | ASTM A 194 | 2H | -29~425℃ |
B7M | 2HM | -29~425℃执行NACE标准的抗硫阀 | ||
B16 | 7 | -29~593℃ | ||
B8 | 8 | -196~700℃ | ||
B8M | 8M | |||
ASTM A 320 | L7 | 4 | -46~101℃低温阀 |
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