The main reason which causes the breakdown of marine boiler superheater is its inner corrosion, which is taken to be developed from the parts of tube top to entire top, and this leads to leakage.
鉴于某型舰用锅炉过热器破损的主因在于其内部腐蚀，而破损的主要方式是由管头的溃烂开始直至整个管头烂掉为止，导致管子的胀接松动而漏泄。
Therefore the service life of superheater is mainly dependent on the corrosion speed of tube top.
因此，过热器的使用年限全取决于管头的腐蚀速度。
The furnace, U-beam separator, and superheater enclosures are constructed entirely of top-supported, gas-tight, all-welded membraned tube walls which do not require hot expansion joints.
炉膛、U型钢分离器，以及过热器的外壳由顶部支撑、气密、全焊接的膜式管墙构成，因此不需要膨胀节。
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