GJ 70 liquid caustic soda tank wagon is popular wagon to transport liquid caustic soda ( concentratiion of liquid casutic soda is more than 30%).

The main structure consists of tank, underframe, heating device,  end ladder, roof walk board, coupler and draft gear, braking system, and bogie etc. There hang braking machine and platform is assembled too. There is no center sill on wagon.

1. Tank

 The tank is comprised of end dome, tank barrel, human hole, respiration valve and liquid trap. The bottom of tank barrel is slope. The main material is high strength structure steel.

2. Underframe

 The underfarme mainly consists of center sill, body bolster, side sill and end sill etc.

3. End ladder and roof walk board

 There is end ladder on tank and roof walk board l is assembled on top of tank.

4. Coupler and draft gear

At each end of the wagon will be provided with a high performance coupling device (high tensile couplers and high capacity draft gears) suitable for hauling in rake formation of heavy train as mentioned uphill at the maximum gradient.

5.Braking system:

 The GJ70 will be installed with the conventional single pipe gradual release automatic air brake incorporated with slack adjuster and automatic load brake device. Each wagon can be coupled with the air brake train. The application and release operation of the air brake system will be quick and uniform.

6. The  bogie can be operated with safe high speed capability, greater stability in curve, hunting-free performance, wheel/rail wear reduction, improved ride quality and extended life cycle.The bogie and its components will be designed to operate with lower maintenance cost between overhaul periods.