一、制(zhi)作(zuo)方法：

　　接(jie)直徑大小、節(jie)數、曲率半徑這些數據(ju)進行每節(jie)展開，然后腹(fu)板相(xiang)對再焊起來

　　二、通風管的簡單(dan)介(jie)紹:

　　通(tong)(tong)(tong)風(feng)(feng)管(guan)(guan)是中空的(de)用(yong)于(yu)通(tong)(tong)(tong)風(feng)(feng)的(de)管(guan)(guan)材(cai)(cai)風(feng)(feng)管(guan)(guan)彎頭，多為(wei)圓形(xing)(xing)或方形(xing)(xing)。通(tong)(tong)(tong)風(feng)(feng)管(guan)(guan)制作與安裝(zhuang)所用(yong)板材(cai)(cai)、型材(cai)(cai)以及其它主要(yao)成品材(cai)(cai)料(liao)，應(ying)符合設計及相關(guan)產品國(guo)家現行標準的(de)規(gui)定，并應(ying)用(yong)出(chu)廠檢驗合格證明，材(cai)(cai)料(liao)進場時應(ying)按國(guo)家現行有關(guan)標準進行驗收(shou)。通(tong)(tong)(tong)風(feng)(feng)管(guan)(guan)一般有：船用(yong)通(tong)(tong)(tong)風(feng)(feng)管(guan)(guan)有正壓(ya)通(tong)(tong)(tong)風(feng)(feng)管(guan)(guan)和負壓(ya)通(tong)(tong)(tong)風(feng)(feng)管(guan)(guan)及PE薄膜通(tong)(tong)(tong)風(feng)(feng)管(guan)(guan)。

　　環保通風工程通風管、鍍鋅板（白鐵）風管、不銹鋼通風管、玻璃鋼通風管、塑料通風管、復合材料通風管、彩鋼夾心保溫板通風管、涂膠布通風管（如礦用風筒）、礦用塑料通風管等；伸縮通風管，阻燃風管， 鋁箔復合保溫管；中央空調保溫軟管。