1、材料要求

1, material requirements

①、板材表面应平整，厚度应均匀，无凹凸明显的压伤现象，并且不得有裂缝、砂眼、结疤、刺边和锈蚀等情况。

1. The surface of the sheet should be smooth and the thickness should be uniform. There is no bump and obvious compression injury, and there must be no cracks, sand holes, scarring, prickling and rusting.

②、选用材料的厚度应符合规范规定：（mm）

The thickness of the material should conform to the regulation: (mm)

③、型钢应该注意等型，均匀，不应有裂缝，气泡、窝穴及其它影响质量的缺陷，特别注意现有角钢有不等边的情况。

3. Type steel should pay attention to the same type, uniform, no cracks, bubbles, nest points and other defects affecting the quality, special attention is paid to the condition of unequal edges of the existing angle steel.

2、风管制作作业条件

2. Conditions for the production of wind pipe

①、图纸已经熟悉，并且经过图纸会审。对建筑、结构和电气、暖卫施工图中的管路走向、坐标、标高与通风管道之间跨越交叉在图纸上出现的问题已经有解决方案。

The drawings have been familiar with and have been examined through drawings. There is a solution to the problems of the pipeline direction, coordinates and elevation of the construction, the structure and the electrical and thermal construction drawings, and the problems appearing on the drawings between the crossing and the crossing of the ventilation pipe.

②、材料表面油污应全部清除干净，以免铁锈或氧化物落于材料表面产生局部腐蚀。

Second, the oil on the surface of the material should be cleaned up to avoid rust or oxide falling on the surface of the material to cause localized corrosion.

③、必须有一个单独的加工场地，为了不破坏镀锌钢板外的保护膜，工作场地最好铺设木板或者橡胶板，保持场地清洁。

3. There must be a separate processing site. In order not to destroy the protective film outside the galvanized steel plate, the best work site is to lay the wood board or rubber plate to keep the site clean.

④、已进行了施工技术交底，对风管制作的尺寸，采用的技术标准、接口及法兰连接方法已经明确。并且已经做好施工交底记录。

4. Construction technology has been carried out, and the technical standard, interface and flange connection method of the size of the wind pipe are clear. And the construction records have been done well.