①. 均速管(guan)(guan)(guan)流量計（例如阿牛巴(ba)(ba)、威力(li)巴(ba)(ba)等(deng)）、畢托(tuo)(tuo)管(guan)(guan)(guan)流量計及其變形產品如V形畢托(tuo)(tuo)管(guan)(guan)(guan)流量計和畢托(tuo)(tuo)式(shi)文(wen)丘(qiu)里管(guan)(guan)(guan)，宜安裝在水平(ping)管(guan)(guan)(guan)道上(shang)，當測(ce)量氣體或蒸汽(qi)時，也(ye)可(ke)安裝在垂(chui)直管(guan)(guan)(guan)道上(shang)。

 ②. 均速(su)管流(liu)量計不可用于測量兩(liang)相流(liu)及工作溫(wen)(wen)度(du)低(di)于飽和(he)溫(wen)(wen)度(du)的(de)蒸(zheng)汽(qi)流(liu)量的(de)測量。

 ③. 均(jun)速管(guan)流量計應(ying)安裝在被(bei)測介質(zhi)完全充滿的(de)管(guan)道上。

 ④. 均(jun)(jun)速(su)管(guan)流(liu)量(liang)計在(zai)工藝管(guan)道(dao)上截面(mian)(mian)上的(de)(de)插(cha)入方位(wei)應滿足(zu)下(xia)列(lie)要求：在(zai)水(shui)平(ping)管(guan)道(dao)上安裝、測(ce)量(liang)氣體(ti)時，應在(zai)水(shui)平(ping)線(xian)(xian)(xian)(xian)以上且與(yu)水(shui)平(ping)線(xian)(xian)(xian)(xian)夾角30°～150°的(de)(de)范圍(wei)內；在(zai)水(shui)平(ping)管(guan)道(dao)上安裝、測(ce)量(liang)液體(ti)和(he)蒸汽時，應在(zai)水(shui)平(ping)線(xian)(xian)(xian)(xian)以下(xia)且與(yu)水(shui)平(ping)線(xian)(xian)(xian)(xian)夾角-50°～-130°的(de)(de)范圍(wei)內；在(zai)垂(chui)直(zhi)管(guan)道(dao)上安裝時，可(ke)在(zai)與(yu)管(guan)道(dao)中(zhong)(zhong)(zhong)心(xin)(xin)線(xian)(xian)(xian)(xian)垂(chui)直(zhi)的(de)(de)平(ping)面(mian)(mian)內的(de)(de)任意(yi)位(wei)置；均(jun)(jun)速(su)管(guan)流(liu)量(liang)計測(ce)壓孔(kong)開(kai)孔(kong)中(zhong)(zhong)(zhong)心(xin)(xin)線(xian)(xian)(xian)(xian)與(yu)管(guan)道(dao)中(zhong)(zhong)(zhong)心(xin)(xin)線(xian)(xian)(xian)(xian)的(de)(de)偏(pian)(pian)差(cha)應小(xiao)(xiao)于3°，均(jun)(jun)速(su)管(guan)流(liu)量(liang)計中(zhong)(zhong)(zhong)心(xin)(xin)線(xian)(xian)(xian)(xian)與(yu)管(guan)線(xian)(xian)(xian)(xian)垂(chui)直(zhi)度偏(pian)(pian)差(cha)應小(xiao)(xiao)于5°，與(yu)管(guan)道(dao)中(zhong)(zhong)(zhong)心(xin)(xin)線(xian)(xian)(xian)(xian)的(de)(de)偏(pian)(pian)差(cha)應小(xiao)(xiao)于3°。

 ⑤. 測(ce)量(liang)(liang)精(jing)度(du)(du)要求(qiu)為±1％時，均速管流量(liang)(liang)計上(shang)、下(xia)游(you)側直(zhi)管段(duan)長度(du)(du)應符(fu)合表2.46的(de)要求(qiu)。測(ce)量(liang)(liang)精(jing)度(du)(du)要求(qiu)為士3％時，至少應有(you)上(shang)游(you)側3DN、下(xia)游(you)側2DN的(de)直(zhi)管段(duan)長度(du)(du)。