现在有很多焊接无缝异型管的地方，花费也会高一些，那么，如果是自己焊接异型钢管的话，应该注意哪些东西？下面重点说出六点来，详细说出无缝异型管焊接所需要的六点注意事项。希望能够帮助到大家（一）检查水、电、气是否接通，并按要求全部连接好，不能松动。水、电、气都是无缝异型管焊接过程中的危险因素，所以在焊前一定要检查好。
Now there are many places to weld seamless special-shaped pipes, and the cost will be higher. So, if you weld special-shaped pipes yourself, what should you pay attention to? The following six points are highlighted, and the six points for attention in seamless special-shaped pipe welding are stated in detail. Hope to be able to help you (1) check whether water, electricity and gas are connected, and according to the requirements of all the connections, can not be loosened. Water, electricity and gas are all risk factors in the welding process of seamless special-shaped pipe, so it must be checked before welding.
（二）使用相关工具清洁母材表面，即用刷子或砂纸彻底清除母材表面水、油、氧化物等杂质，以保证焊接质量。
(2) Use relevant tools to clean the surface of base metal, i.e. use brush or sandpaper to completely remove impurities such as water, oil and oxide on the surface of base metal, so as to ensure the welding quality.
（三）要注意无缝异型管焊接工作场所的清理，不能有易燃、易爆物,采取避风措施等。
(3) Attention should be paid to the cleaning of welded workplaces for seamless special-shaped pipes. No flammable or explosive substances should be allowed and wind-proof measures should be taken.
（四）认真检查焊机的接线是否符合要求，电线质量问题是最容易引发事故的因素，所以一定不能掉以轻心。
(4) Carefully check whether the wiring of the welder meets the requirements. Wire quality is the most likely factor to cause accidents, so we must not take it lightly.
（五）对无缝异型管母材进行焊前检查，因为这直接关系着焊接效果，所以是很在必要的。
(5) It is necessary to inspect the base metal of seamless special-shaped pipe before welding because it is directly related to the welding effect. （六）重要焊接结构要采用化学清洗法进行清洁。可简单地采用丙酮或烧碱硫酸等清洗其表面的水、油、高熔点氧化膜、氧化物等污染物。
(6) Chemical cleaning should be used to clean important welded structures. Contaminants such as water, oil, high melting point oxide film and oxide can be simply cleaned by acetone or caustic soda sulfuric acid.
