高温单头式电热管在制作上需极为精细。
High temperature single type electric heating tube in the production need to be very fine.
从外型看，拉手有管形、条形、球形及各种几何外形，还有单头式、双头式、外露式、封闭式等区别。
Look from exterior, shake handshandle has a canal form, form, globose reach all sorts of geometry figure, still have only head type, double head type, appear type, enclosed wait for distinction.
设计单管程浮头式换热器时，为避免较大的温差应力，在壳程设计压力较大的状况下，常采用内置膨胀节的形式。
Internal expansion joint shall be adopted to single tube side float head heat exchanger for avoiding from large temperature difference stress, when design pressure on shell side is larger.
设计单管程浮头式换热器时，为避免较大的温差应力，在壳程设计压力较大的状况下，常采用内置膨胀节的形式。
Internal expansion joint shall be adopted to single tube side float head heat exchanger for avoiding from large temperature difference stress, when design pressure on shell side is larger.
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