根据生产现场对大口径直缝焊管管端直径和椭圆度检测的需求，对目前国内外用于大口径直缝焊管管端直径和椭圆度的各种检测技术进行了整理和归纳，包括了接触式直径检测和非接触式直径检测。并通过对各检测方法的分析和技术对比，阐明了未来大口径直缝焊管管端直径和椭圆度检测的发展趋势。
Methods of measurement for Outer Diameter and Ellipticity of Butt-welded Pipe’s End are sorted out and concluded on the basis of practical requirements of field, which include contacting measurements and non-contacting measurements. Through the comparison of those different measurement methods, the development trend of measurement technology for pipe end’s Outer Diameter and Ellipticity.
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