1、 Spiral duct connection requirements:

1）單壁螺旋風管直徑≤600mm采用芯管插接加自攻螺絲連接方式，直徑＞600mm采用角鋼法蘭連接。

1) Single wall spiral air duct with diameter less than or equal to 600mm shall be connected by core pipe plug-in and self tapping screw, and the diameter greater than 600mm shall be connected by angle steel flange.

2）雙壁螺旋風管直徑＜650mm采用機械法蘭連接，直徑≥650mm采用角鋼法蘭連接。

2) Double wall spiral air duct with diameter less than 650mm is connected with mechanical flange, and diameter ≥ 650mm is connected with angle steel flange.

二、雙壁螺旋風管加工一般規定:

2、 General requirements for processing double wall spiral air duct:

1）外層螺旋風管鍍鋅板為熱鍍鋅，其外層鍍鋅板厚度同單壁螺旋風管要求。

1) The galvanized sheet of outer spiral air duct is hot-dip galvanized, and its thickness is the same as that of single wall spiral cyclone tube.

2）內層板為0.55mm厚的穿孔鍍鋅板，穿孔率應在30％以上。

2) The inner layer is 0.55mm thick perforated galvanized sheet, and the perforation rate should be more than 30%.

3）中間保溫層采用厚度為25mm、密度為32kg／m3的玻璃棉做保溫吸聲，外貼碳化無紡布。

3) Glass wool with thickness of 25 mm and density of 32 kg / m3 is used as insulation and sound absorption layer, and carbonized non-woven fabric is pasted outside.

三、單壁螺旋風管加工:

3、 Single wall spiral air duct processing:

鋼帶架上裝好成卷的薄鋼帶，薄鋼帶通過切斷與焊接機構進入壓制成型工作部分，成型工作頭（專用模具）使通風管道按規定的管徑鎖縫成形。成型螺旋管沿成品架不斷加工，向前延長，移動鋸根據所需尺寸截取卷好的圓形螺旋通風管。然后從成品架上卸下放成品區，按系統編好號。

The thin steel strip in coils is installed on the steel belt rack, and the thin steel strip enters the pressing forming part through the cutting and welding mechanism, and the forming working head (special mold) makes the ventilation pipe seam forming according to the specified pipe diameter. The forming spiral pipe is continuously processed along the finished product rack and extended forward. The circular spiral ventilation pipe is cut off by moving saw according to the required size. Then it is unloaded from the finished product rack to the finished product area and numbered according to the system.

A、濟南風管加工廠家生產的螺旋風管上的消聲器制做與安裝操作要點

A. Manufacturing and installation operation points of muffler on spiral air duct produced by Jinan air duct processing factory

1．消聲器和消聲彎管應單獨設支架，其重量不得由風管承受。

1. Mufflers and silencing elbows shall be provided with separate supports, and their weight shall not be borne by the air duct.

2．消聲材料的選用應符合設計的防水、防腐、防潮要求。

2. The selection of anechoic materials should meet the design requirements of waterproof, anti-corrosion and moisture-proof.

3. 消聲片單體安裝、固定端不得松動，片距應均勻。

3. The installation and fixed end of the anechoic sheet shall not be loose, and the spacing between the sheets shall be uniform.

4．消聲器的穿孔板應平整，孔眼排列應均勻，不得有毛刺，其穿孔率應符合設計的要求。

4. The perforated plate of muffler shall be flat, the hole arrangement shall be uniform, without burr, and the perforation rate shall meet the design requirements.

B、硬聚氯乙烯螺旋風管的部件制做操作要點

B. Key points of manufacturing and operation of UPVC spiral air duct

1. 防火閥安裝方向位置應正確，易熔件應在系統安裝后裝入。

1. The installation direction and position of fire damper shall be correct, and the fusible parts shall be installed after system installation.

2. 螺旋風管水平安裝，水平度的允許偏差每m不應大于3mm，總偏差不應大于20mm。螺旋風管垂直安裝；垂直度的允許偏差每m不度大于2mm，總偏差不應大于20mm

2. For horizontal installation of spiral air duct, the allowable deviation of levelness shall not be greater than 3mm per m, and the total deviation shall not be greater than 20mm. Spiral air duct shall be installed vertically; the allowable deviation of perpendicularity shall not be greater than 2mm per m, and the total deviation shall not be greater than 20mm

3. 各類風口的安裝應平整、位置應正確、轉動部分靈活，與螺旋風管的連接應牢固。

3. The installation of all kinds of tuyere should be flat, the position should be correct, the rotating part should be flexible, and the connection with spiral air duct should be firm.

4. 支吊、托架不應設置在風口，閥門檢視口處，吊架不得直接甩在法蘭上。

4. Supports and brackets shall not be set at the air outlet and valve inspection port, and the hanger shall not be directly thrown on the flange.