就螺纹锁紧环式换热器设备的制造，从材料复验、加工、筒节成形、焊接、探伤及返修等方面作了简单地介绍，重点讲述了螺纹锁紧环式换热器制造中的难点及要注意的问题。
This article describe manufacture process from material reexamine, layout, welding, NDT to do poorly done work over again about steel, especially describe the difficulty and notice item about it.
责任师对材料的质量证明书、复验结果进行确认，合格后编材料入厂编号，并在质量证明书盖章。
The responsibility engineers will confirm the quality certificates, and the re-inspection result of the materials. Identified by the inspectors, the conforming materials will be coded.
责任师对材料的质量证明书、复验结果进行确认，合格后编材料入厂编号，并在质量证明书盖章。
The responsibility engineers will confirm the quality certificates, and the re-inspection result of the materials. Identified by the inspectors, the conforming materials will be coded.
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