罐壁人孔裝于油罐下部，人可以由此進出。本產(chǎn)品出廠時不帶加強板，

Shell manhole series shall be set on lower tank shell course for people and going out or the tank.the reinforcing plate of manhole is out of scope of supply.

罐壁人孔“尺寸表” Dimendion table：

罐壁人孔“訂貨須知” Order Construction：

訂貨時請注明標(biāo)準(zhǔn)號、壓力及規(guī)格。

Please give clear indication of Standard，pressure and size.
備注 Remarks：
人孔分為 Manhole into：
1. 緊急泄壓人孔 Emergency relief manhole；
2. 防爆阻火呼吸人孔 Type breather manholes；
3. 罐頂人孔 The top of the tank manhole；
4. 罐壁人孔 The manhole of the tank wall；
5. 帶芯人孔 The belt core manhole
罐壁人孔只是人孔的一個分支，他的主要作用為 The manhole of the tank wall is a branch of manhole, his main role：
1. 方便安裝與維修的人進出；
Easy to install and repair people in and out;
2. 方便維護人員清理雜質(zhì)。
Convenient maintenance personnel to clean impurities。