问题
单项选择题
管壁比较厚的不锈钢管采用法兰连接时，其连接法兰的形式为（）。
A．平焊法兰
B．对焊法兰
C．翻边活动法兰
D．焊环活动法兰
答案
参考答案：D
解析：
焊环活动法兰多用于管壁比较厚的不锈铜管法兰的连接。法兰的材料为Q235、Q255碳素钢。它的连接方法是将与管子材质相同的焊环直接焊在管端，利用焊环作密封面，其密封面有光滑式和榫槽式2种。
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管壁比较厚的不锈钢管采用法兰连接时，其连接法兰的形式为（）。
A．平焊法兰
B．对焊法兰
C．翻边活动法兰
D．焊环活动法兰
参考答案：D
解析：
焊环活动法兰多用于管壁比较厚的不锈铜管法兰的连接。法兰的材料为Q235、Q255碳素钢。它的连接方法是将与管子材质相同的焊环直接焊在管端，利用焊环作密封面，其密封面有光滑式和榫槽式2种。
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