1 Manhole

　Manhole is located at the bottom of tank; person can pass in and out through it. This product don’t have strength plate when delivery factory, if you want non-standard manhole, please provide dimension or diagram for our manufacturing.

DN	L	H
500	645	320
600	755	340
750	980	345

2 Cleaning Hole

DN	L	H
50	51	135
80	81	150
100	100	160
500×700

3 Sewage hole with drain pipe

DN	L	H
50	60	160
80	75	195
100	85	215
150	95	280

4 Light hole
Light hole shall be set on tank roof for airing and lighting.

5 Vent hole　

Vent hole shall be set on the top side wall of tank for airing, size is 700×400.

6 Roof vent pipe

The roof vent pipe shall be set on top of tank for airing

DN	L	H
50	200	186
100	300	220
150	450	283
200	550	324
250	600	378
300	660	365

7 Foam generator
Air foam generator is installed on the tank for firefighting. Our company only provide generator assembly, others do not supply. 

Size	L	H
PC-4 25L	216	170
PC-8 50L	228	190
PC-12 100L	230	210
PC-24 150L	234	230

8 Gauge hatch (LYL)

Gauge hatch series, which are pedal type and set on the tank roof for measuring the oil lever & temperature and also for sampling of the oil in the tank.