根据FWEC管式空气预热器技术规范对管子—管板胀接的要求，对有缝电阻焊管胀接进行工艺试验。
In this paper, to meet the expending requirements of technical specification for FWEC Tubular Air Heaters, the expending procedure test for the ERW tube was performed.
为满足市场对复合管的需求，对于我国直缝焊管机组改造有借鉴作用。
Furthermore, to meet the needs from market, it is helpful to reconstruct the existing longitudinally welded tubing mill in our country.
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