管道焊接不得使用氧乙炔焰焊接。

Oxyacetylene flame can' be used for welding of pipeline.

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当采用氧乙炔焰或等离子切割时，切割后必须除去影响焊接质量的表面层。

If oxyacetylene flame or plasma is adopted, surface coat that can impact welding quality shall be removed after cutting.

youdao

当采用氧乙炔焰或等离子切割时，切割后必须除去影响焊接质量的表面层。

If oxyacetylene flame or plasma is adopted, surface coat that can impact welding quality shall be removed after cutting.

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