BOGIE PETROL TANK WAGON
INTRODUCTION
The design of this wagon has been developed
by RDSO and the wagons have been put into
service over Indian railways towards the end of
1989.
PURPOSE
BTPN Wagons are used for carrying petroleum
products like Petrol, Nephtha, Diesel,Kerosene,
Black oil and also used for carrying Molasses
and Vegetable oil.
Dimensional Details of BTPN
Sr. No Description
1 Length over head stock 11491 mm
2 Length over couplers 12420 mm
3 Barrel Dia (inside) 2850 mm
4 Barrel Length 11458 mm
5 Thickness of barrel plate 8 mm
6 Thickness of dished end 12 mm
7 Axle Load 20.32 t
8 Tare load 27.0 t
9 Pay load 54.28 t
10 Gross load 81.28 t
11 Cubic Capacity (Cu/m) 70.40 cu/m
12 Working pressure of barrel 1.4 kg/cm2
13 Test pressure of barrel 2.8 kg/cm2
STRUCTURAL DETAILS
UNDERFRAME
The design of the underframe of BTPN wagon is generally
similar to that of other IRS wagons except that a pair of
saddles is provided on the underframe at each end for
mounting the barrel.
Barrel and Saddles
The barrel is cylindrical vessel generally fabricated out of low
carbon structure steel to IS:2062 Fe 410CuW. The barrel is
placed longitudinally on the underframe and secured by
means of rivets to the saddle. The saddle is welded on
underframe at each end.
BARREL FITTING
Different types of barrel fitting are necessary for
filling, measuring and decanting various products.
Safety fittings are also necessary to release any
undue pressure that may be developed during
transportation.
BTPN DOME FITTING OR MASTER VALVE FITTING
SAFETY VALVE
It is spring loaded valve which gets
lifted when the pressure inside the
barrel exceeds certain
predetermined value.
The valve is set at a release
pressure of
1.4 kg/Sq.Cm. One safety Valve has
been provided on the barrel at the
top of the center.
DIP ROD PIPE WITH PLUG
Dip rod pipe with a plug has been provided to gauge, by
the Dip rod, height of the commodity during filling.
MASTER VALVE
It is a gravity discharge valve fitted bottom inside of barrel
with a hand wheel in the dome for manual operation. A
long vertical spindle connects valve with hand wheel. The
hand wheel is operated to discharge the contents of the
barreI by gravity. The lift of the valve is 35mm.
FILLING PIPE
100 mm NB filling pipe has been provided in each dome
for connecting inlet hose required during gravity filling of
product at loading point. The pipe is provided with cap for
closing the pipe after loading.
VAPOUR EXTRACTOR COCK
Function of this cock is to extract vapour from the tank
during filling. One such cock inside each dome have been
provided. Suitable cap has been provided to close the cock
after loading.
BOTTOM DISCHARGE VALVE
This valve is fitted below the barrel under each Master
Valve. This is a tapered lubricated plug valve. The main
function of the valve is to control the flow of the content
during unloading and also to serve as an additional safety
stop in case the Master Valve fails or leaks.
STEAM CLEANING OF TANK BARREL
The barrel requiring steam cleaning should placed as near to the
steam supply line possible and protected against any movement.
After removal of manhole cover and other fittings, the barrel shall
be left exposed to atmosphere for 24 hrs.
Entry of staff in tank barrel should be strictly prohibited before
cleaning and signs with suitable legends displayed at a reasonable
distance away from the barrel to be steam Cleaned.
In order to clean the barrel thoroughly, steam pipe should be
inserted through manhole and steam be injected for 12 hrs.
Remove condensed steam collected in the tank barrel and keep
the barrel exposed to atmosphere for another 24 hours.
PROCEDURE FOR LOADING/UNLOADING
Before loading the wagon must be certified fit for loading by
the TXR. Instructions issued by the Board/Railways from time
to time in this regard should be religiously followed.
The wagons to be loaded/unloaded are placed in position
preferably under shed and hand brake are applied to prevent
any movement.
It should be ensured that points leading to loading/unloading
line on which the wagons are to be loaded/unloaded are set
and pad locked so as to isolate the line on which the
loading/unloading are to be done.
Shunting of wagons are not permitted on the same line when
loading/unloading is done.
Throughout the entire period of transfer operation, the
wagon must be continuously attended to by the operator.
Precaution to be taken at loading points
• Ensure that all tank fittings are in good working condition.
• Ensure that the master valve is fluid tight.
• Ensure that the bottom discharge valve is fully closed and
fitted with a blank flange and gasket before commencement.
• Ensure that the vapour extractor cock and vent plug are
open before commencement of loading.
• Ensure that loading is done through the filling pipe only.
• Ensure that recommended air space as specified for the
particular petroleum product is provided and that payload
does not exceed the permissible limit.
• Provide proper sealing when dome cover eye bolt nuts are
tightened.
• Make sure that the dome cover is closed after loading.
