空调水禁忌手册

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1、通风与空调工程禁忌手册禁忌1：钢塑复合管采用螺纹连接时，其旋入深度及紧固力矩等不符合要求.根据国家标准GB/T9124－2000《钢制管法兰技术条件》的要求，对于平面和凸面的平焊钢制管法兰的材质应采用Q235A碳素结构钢，平面平焊法兰使用范围为：公称压力PN2.5MPa，最高温度300℃；常用的凸面板式平焊钢制管法兰有关参数，如图1-1及表1-1～表1-3所示。图1-1凸面板式平焊钢制管法兰表1-1PN0.25MPa、PN0.6MPa凸面板式平焊钢制管法兰（mm）公称通径DN管子外径A法兰外径D螺栓孔中心圆直径

2、K螺栓孔径L螺栓密封面法兰厚度C法兰内径B法兰理论重量/kg数量n螺纹df10152017.221.326.97580905055654411444M10M10M1033384822212121418．022．027．50．310．350．5325324033.742.448.31001201307590100111414444M10M12M1258697833314161634．543．549．50．600．991．1750658060.376.188.9140160190110130150141418444

3、M12M12M168810812433316161861．577．590．51．281．612．60100125150114.3139.7168.3210240265170200225181818488M16M16M16144174199333182020116．0141．5170．52．853．864．23200250300219.1273.0323.932037544028033539518182281212M16M16M20254309363334222424221．5276．5327．56．238．15

4、10．53350400450355.6406.4457.0490540595445495550222222121616M20M20M20413463518444262830359．5411．0462．015．2618．1222．64500600508.0610.064575560070522262020M20M24568667453236513．5616．526．5835．70表1-2PN1.0MPa凸面板式平焊钢制管法兰（mm）公称通径DN管子外径A法兰外径D螺栓孔中心圆直径K螺栓孔径L螺栓密封面法兰厚度C法

5、兰内径B法兰理论重量/kg数量n螺纹df10152017.221.326.99095105606575141414444M12M12M1241465622214141618．022．027．50．530．590．8525324033.742.448.311514015085100110141818444M12M16M1665768433316181834．543．549．50．961．591．8250658060.376.188.9165185200125145160181818448M16M16M169911

6、813233320202061．577．590．52．433．483．95100125150114.3139.7168.3220250285180210240181822888M16M16M20156184211333222224116．0141．5170．54．524．936．53200250300219.1273.0323.934039544529535040022222281212M20M20M20266319370334242628221．5276．5327．58．5110．9213．303504004

7、50355.6406.4457.0505565615460515565222626161620M20M24M24429480530444303235359．5411．0462．020．2629．3230．56500600508.0610.067078062072526302020M24M27582682453842513．5616．537．8250．17表1-3PN1.6MPa凸面板式平焊钢制管法兰（mm）公称通径DN管子外径A法兰外径D螺栓孔中心圆直径K螺栓孔径L螺栓密封面法兰厚度C法兰内径B法兰理论重量/k

8、g数量n螺纹df10152017.221.326.99095105606575141414444M12M12M1241465622214141618．022．027．50．530．590．8525324033.742.448.311514015085100110141818444M12M16M1665768433316181834．543．549．50．961．591．82506580