The optimum design of shell surface structure is often used in pressure vessel manufacture to reduce the cost.

在压力容器设计中，为求得最低制造成本，常常对容器壳体进行优化设计。

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The crimped head design, prevents solids from dislodging the seal face, allows the seal to withstand higher pressure and rotational speed and eliminates the metal shell from contacting the seal ring.

波纹式头部设计，防止固体颗粒从密封面上撞出，使得密封能够抵抗更高的压力和旋转速度，避免金属壳接触到密封环。

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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。

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