1) Dip Hatch （LYK）
The Dip Hatch is Pedaled and installed on top of oil tank to measure the height and temperature of oil in tanks, and for sampling. Standard for Manufacture and testing：SY/T0525.5-93
2) Headpiece Breather Pipe (TQG)
Headpiece Breather Pipe installs on the top of tanks for heavy oil to assist respiration. Standard for Manufacture and testing：SY/T0525.4-93
3）、Wall Breather Pipe（TQK）
Wall Breather Pipe is generally installed on the upper side wall of top covered floating roof tank to assist respiration. Norms:700×400。
Standard for Manufacture and Testing: SY/T0525.4-93
4）、Tank Manhole（GRK）
The device is installed on the bottom of tanks and people can walk in and out through the hole. There is no strength plate when delivery. And if Manhole of other standards or off-gauge are in need , just offer us standards or drawing sheet, we can manufacture as you want. Standard for Manufacture and Testing: SY/T0525.4-93
5）、Clean-out Hatch（QWZ）
The device is installed on the bottom of tanks and wastewater can be released through the hole while cleaning. Standard for Manufacture and Testing: SY/T0525.4-93
6）、 Drain Hole with Blow-off Pipe（PWK）
The device is installed on the bottom of tanks for light oil, and sludge can be released through the hole while cleaning. Daily wastewater can also be released from the hole. Standard for Manufacture and Testing: SY/T0525.4-93
7) Loophole（TGK）
The device is installed on the top of tanks for Ventilation and lighting. Standard for Manufacture and Testing: SY/T0525.4-93
