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的区别就是焊�~��Ş式，与ERW的区别是焊接工艺的区别，埋弧焊（SAW�Q�是要添加介质的�Q�焊丝、焊剂）�Q�ERW不需要，ERW是通过中频加热熔融的。钢��按生��Ҏ��可分��Z��大类�Q�无�~�钢��和焊接钢管。无�~�钢��按生��Ҏ��可分为：热蝾无缝��、冷拔管、精密钢��、热扩管、冷旋压��和挤压��等。无�~�钢��用优质��素钢或合金钢制成，有热轧、冷轧（拔）之分�?/p> <p>直缝焊管生��工艺��单，生��效率高，成本低，发展较快。螺旋焊��的强度一般比直缝焊管高，能用较窄的坯料生产管径较大的焊管�Q�还可以用同样宽度的坯料生�񔽎�径不同的焊��。但是与相同长度的直�~�管相比�Q�焊�~�长度增�?0~100%�Q�而且生��速度较低。因此，较小口径的焊��大都采用直�~�焊�Q�大口径焊管则大多采用螺旋焊�?/p></div> <div style="text-align:left; width:100%; height:40px; line-height:40px; background:#f00; display:block; margin:0 auto; margin-top:30px;">上一��：<a href='/news/113.html'>重新认识螺旋钢管焊缝较长的问�?/a></div> <div style="text-align:left; width:100%; height:40px; line-height:40px; background:#f00; display:block; margin:0 auto; margin-top:30px;">下一��：<a href='/news/115.html'>螺旋钢管厂钢板凸度定义解�?/a></div> </div> </div> </div> </div> </div> <footer class="wow fadeInUp"> <div class="wrap"> <div class="link hidden-xs"> <ul class="list-unstyled no-margin"> <li><a href="/" target="_blank">�|�站首页</a></li> <li>|<a href="/about.html" 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