The welding preparation of city gas pipeline, welding technological requirements and control for factors effecting welding quality are analyzed.

分析了城市燃气管道的焊前准备、焊接工艺要求以及对影响焊接质量诸因素的控制。

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In actual body-welding process, the change of technological methods makes all welding factors meet the technological requirements, and to achieve the result of improving the body-welding quality.

在实际的车身焊接工作中，通过改变工艺方法，保证了各个焊接因素满足工艺要求，从而达到保证和提高车身焊接质量的目的。

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