橢圓快開人孔已有成型產品，直徑通常為600mm。人孔中心距地板一般為750mm。便于工作人員在安裝、清洗、維護時進出油罐和通風。
非金屬油罐的人孔設在罐頂上，金屬油罐的人孔設在罐壁最下圈板上。大都為直徑600mm的圓孔，其中心距底板750mm，為油罐清洗或維修人員進出油罐用，又稱作道門。檢修清理油罐時刻利用人孔進行采光和通風。當只設一個人孔時，應將其置于罐頂透光孔的對面；當設2個人孔時，其中一個設在透光孔的對面，另一個應至少與{dy}個人孔相隔90°。

Elliptic quick open manhole for molding products, the diameter is usually 600mm. Manhole center from the floor general for 750mm. Facilitate staff in the installation, cleaning, maintenance and out of oil tanks and ventilation.
The man with a non metal oil tank is arranged on the top of the tank, and the man in the metal tank is arranged on the bottom of the tank wall. Mostly for a 600 mm diameter hole, the heart from the base plate 750mm, tank cleaning or maintenance personnel in and out of the tank, also known as the door. Maintenance cleaning tank moment daylighting and ventilated manhole. When a person is only a hole, it should be placed in the top of the hole of the top of the tank is opposite; when the 2 individual holes, one is located in the opposite side of the transparent hole, the other should be at least 90 with the first person Kong Xiangge.