If you can't unscrew the drain flange from the T-connector, use a reciprocating saw with a metal-cutting blade and cut the drain assembly away just above the T-connector.
如果你不能从T型三通处拆掉法兰，可用金属锯片将T型三通上方的部分锯掉。
DO NOT use thin rope, cord, or wire, as these will cut and damage the flange.
不要采用细小的绳索或电线，以免切割或损坏法兰。
Flange is in the majority as the accessory usage on the gas pipeline links. Flange interface repair need cut off a tube, change the flange, not only cost is high, but also influence on common gas.
燃气管道上安装的配件用法兰连接的居多，在修复法兰接口时却需要停气断管、调换法兰，不仅费用高，且影响正常用气。
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