使用条件 |
连接形式 |
螺纹连接 |
法兰连接 |
焊接 |
管螺纹 |
活接头 |
全面座 |
平面座 |
凹凸法兰 |
榫槽连接 |
梯形槽连接 |
承插悍 |
对接焊 |
焊 |
大 |
小 |
温度、压力 |
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高温高压 |
× |
× |
× |
× |
△ |
○ |
● |
● |
● |
● |
× |
中温中压 |
△ |
○ |
× |
○ |
● |
● |
● |
○ |
○ |
○ |
○ |
常温高压 |
● |
● |
× |
△ |
○ |
● |
○ |
○ |
○ |
× |
× |
低压 |
● |
● |
● |
● |
● |
△ |
○ |
× |
○ |
× |
○ |
低温 |
△ |
× |
× |
● |
● |
○ |
○ |
× |
○ |
○ |
○ |
温度、压力变动 |
× |
× |
× |
× |
△ |
○ |
○ |
● |
● |
● |
○ |
气体 |
○ |
○ |
○ |
○ |
● |
● |
● |
● |
○ |
● |
○ |
爆炸性 |
△ |
△ |
× |
× |
× |
○ |
● |
● |
● |
● |
○ |
液体 |
● |
● |
● |
● |
● |
○ |
○ |
● |
○ |
○ |
● |
浸没性 |
△ |
△ |
× |
× |
△ |
○ |
● |
● |
● |
● |
● |
其他 |
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放射性 |
× |
× |
× |
× |
× |
× |
× |
× |
● |
● |
× |
口径 |
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<25mm |
● |
● |
○ |
○ |
○ |
× |
× |
× |
● |
× |
● |
<50mm |
● |
○ |
● |
● |
● |
△ |
△ |
○ |
● |
○ |
● |
<100mm |
● |
× |
● |
● |
● |
○ |
○ |
● |
△ |
● |
× |
>100mm |
× |
× |
● |
● |
● |
● |
● |
● |
× |
● |
× |
与管路连接的难易性 |
× |
● |
● |
● |
● |
○ |
△ |
○ |
× |
× |
× |
经济性 |
● |
△ |
● |
● |
● |
○ |
○ |
△ |
○ |
○ |
○ |