SPECIAL TYPE OF WAGON A BG Bogie open wagon BOXN – HA : It has been designed for carrying increased payload for bulk movement of Coal and Iron Ore over Indian Railways. The length and width of the wagon are same as those of existing BOXN wagon except the height, which is 3450 mm from rail level. There by 225 mm higher than the BOXN. The Salient Features of BOXN – HA wagon are given below: i. Length over coupler face - 10713mm. ii. Overall width - 3200mm. iii. Overall Height - 3450mm iv. Tare Weight - 23.17 tonnes. v. Axle Load - 22.1 tonnes. vi. Gross Load - 88.40 tonnes. BOGIE LOW PLATFROM CONTAINER FLATS (BLC ): Bogie container flat wagons have been designed for transportation of 2896mm high series –I, ISO containers for a gross payload of 61t at an operating speed of 100kmph. These containers, when loaded on the earlier flat wagon caused infringement to the X – class MMD, resulting in constraints in their free movement. In order to ensure that the wagons loaded with 2896mm containers lie within the X – class MMD, a low platform height of 1009mm has been achieved with the use of hybrid design of bogie frame and bolster and with the use of smaller diameter wheels (840mm and the condemning size is 780mm). The wagons have welded construction and are mounted on two steel bogies. The flats are formed into units of five wagons, each unit having two - A car at ends and three intermediate B cars. One end of A car is fitted with CBC to ensure proper coupling with the locomotive while the other end has slack less drawbar to couple with B cars empty the barrel and repeat the process till the barrel is free from ammonia. (b) CHLORINE TANK WAGONS:
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SPECIAL TYPE OF WAGON A BG Bogie open wagon BOXN – HA: It has been designed for carrying increased payload for bulk movement of Coal and Iron Ore over Indian Railways. The length and width of the wagon are same as those of existing BOXN wagon except the height, which is 3450 mm from rail level. There by 225 mm higher than the BOXN.
The Salient Features of BOXN – HA wagon are given below:i. Length over coupler face - 10713mm.ii. Overall width - 3200mm.iii. Overall Height - 3450mmiv. Tare Weight - 23.17 tonnes.v. Axle Load - 22.1 tonnes.vi. Gross Load - 88.40 tonnes.
BOGIE LOW PLATFROM CONTAINER FLATS (BLC):
Bogie container flat wagons have been designed for transportation of 2896mm high series –I, ISO containers for a gross payload of 61t at an operating speed of 100kmph. These containers, when loaded on the earlier flat wagon caused infringement to the X – class MMD, resulting in constraints in their free movement.
In order to ensure that the wagons loaded with 2896mm containers lie within the X – class MMD, a low platform height of 1009mm has been achieved with the use of hybrid design of bogie frame and bolster and with the use of smaller diameter wheels (840mm and the condemning size is 780mm).The wagons have welded construction and are mounted on two steel bogies. The flats are formed into units of five wagons, each unit having two - A car at ends and three intermediate B cars. One end of A car is fitted with CBC to ensure proper coupling with the locomotive while the other end has slack less drawbar to couple with B carsempty the barrel and repeat the process till the barrel is free from ammonia.
(b) CHLORINE TANK WAGONS: Fill the tank barrel with water and take a specimen of the same in a clean glass bottle since Chlorine is readily soluble in water. The specimen of water should be tested for any traces of Chlorine. Any traces of Chlorine in water would have bleaching effect on colored litmus paper. If Chlorine is detected, empty the barrel and repeat the process till the barrel is free from Chlorine.
(c) LPG TANK WAGONS:A clean bottle filled with water is lowered through the manhole. A string is attached
to the bottom of the bottle before lowering. Tilt the bottle at the bottom of the tank to allow the water to flow out and gas in the tank to take its place. The bottle should be left in this position for 5 minutes and withdrawn away from the tank. A lighted match stick should then be brought near the bottle or applied to the air or gas inside. If their is no flame the tank is free from injurious gas. In case it gives out flame, the tank should again be steam cleaned.
NEW WAGONSS.No. Stock Description1. BLC/BLCB Low platform container wagons, light weight, all welded
skeleton design under frame for an optimum tare to payload ratio, 840mm wheel dia, A&B cars and with AAR CBC on raised ends of A cars and use of slack less drawbar system on the inner ends of A cars and on all B cars, tare weight A cars 19.1 t B cars 18.01 t, pay load 61t. fit to run at 100 km/hr.
2. BOXNHA Higher Axle load wagon of 22.1t for coal loading. Payload per rake shall increase to 3783t as against 3411t. in the existing BOXN wagon Fit for 100 Km/hr. Payload = 23.17t.
3. BOXN Use of carton steel in place of mild steel for manufacturing of BOXN wagon, in order to reduce the problem of corrosion substantially.
4. BFKN Air Brake CASNUB bogie container flat wagon owned by container corporation.
5. BFNS Special wagons for transportation of HR coil, Suitable for accommodation of various sizes of coils. Adjustable stoppers have been provided for suitable placement of coil in the groove and preventing longitudinal shifting of coils. Fit for 100Kmph.
6. BCCN Double Decker Bogie covered wagon for transportation of automobile cars, Low platform, 840mm wheel dia. Fit for 100Kmph. Axle load = 10.5t,payload = 10t, gross load = 42t, 18 wagons per rack.
7. BCW IT is privately owned by M/s. Bulk Cement Corporation India Ltd. Fitted with Air Brake.
BTPGLN Bogie liquefied petroleum gas tank wagon, fitted with Air Brake.
26. TANK WAGON
Classification of tank wagons
Tank wagons form a special class of non-pooled rolling stock. They are classified according to the product carried by the tank and its design as follows:
a. Tanks as pressure vesselsb. Tanks for corrosive liquidsc. Tanks for petrol and other highly inflammable productsd. Tanks for middle distillates of petroleum and others products.
The Feature of under frame.
The design of the under frame of 4 wheeled and 8 wheeled wagons is generally similar to that of other IRS wagons except that a pair saddles is provided on the under frame at each end for mounting the barrel.
The barrel and saddles
The barrel is cylindrical vessel generally fabricated out of low carbon structure steel to IS 2062 Fe 410 CuW. The barrel is placed longitudinally on the under frame and secured by means of rivets to the saddle. The saddle is welded on under frame at each end.
The Codes used for different types of tank wagons as follows:
SL. No. Type of Wagon Code for the Wagon
1 Ammonia tank TAL, BTAL, BTALN2 Chlorine tank LCT3 Liquefied petroleum gas tank TLGL, BTPGL, BTPGLN4 Sulphuric acid tank TSA & MBTSA5 Petrol tank TPR/A, MBTPX & MBTPZ6 Oil tank TORX7. Heavy oil tank TORX8. Bitumen tank TBT9. Coal tar tank TR10. Petrol tank TR & MBTP11. Oil tank TO12. Oil tank MBTOX13. Caustic soda tank TCS, BTCS14. Hydrochloric acid tank THA15. Molasses tank TM & MBTM
Various types of barrel mountings and safety fittings and their functions are given below:
SL. No. Mounting/Fittings Functions
1 Safety valve The safety valve is provided to prevent building up of excess pressure inside the barrel. It is fitted on the barrel either on the diaphragm plate inside the dome or on a separate opening on the barrel. This is provided on highly inflammable liquids such as petrol, aviation sprit etc.
2 Relief valve It is a spring-loaded valve fitted on the barrel of tanks for corrosive liquids. Its main function is to release built up pressure, if it exceeds the working pressure limit.
3 Safety vent This consists of frangible disc (lead or any approved Material not affected by lading), which ruptures at specified pressure. It is an additional safety fitting to safeguard against the failure of the relief valve. When the built up pressure exceeds the working pressure of the relief valve and the latter fails to function for any reason the frangible disc of this safety vent ruptures to release the pressure.
4 Compressed air valve It is provided on tank from which the contents are
unloaded by compressed air. Its main function is to control the rate of discharge by controlling the rate of air admission.
5 Vapour extractor Its function is to extract vapour from the tank while Cock filling.
6 Master valve It is a gravity discharge valve fitted with a hand wheel in The dome for manual operation.
7 Bottom discharge BG 4-Wheeler bottom discharge valve are provided Valve with single bottom discharge valve situated underneath
the master valve while on BG/MG eight wheeler stock two bottom discharge valves are fitted, one on either side and connected with the master valve through a “T” pipe. The main function of the valve is to control the flow of the contents and also to serve as an additional safety stop in case the master valve fails or breads. The bottom discharge valve openings are also provided with blank flanges to be used with 2mm compressed asbestos fiber jointing material to serve as further check on accidental leakage of contents.
The periodicity of POH & ROH of tank wagons as follows:
SL.No. Type of wagons For 1 st POH For subsequent POH
1 4 wheeler tank wagons 4 years 3-1/2 yearsExcept those listed below
2 Tanks for liquid chlorine 2 years 2 yearsAnd hydro chloric acid
3 Tanks for liquid 2-1/6 years 2-1/6 yearsAmmonia
4 Tanks for petroleum gas 4 years 4 years5 BPTN 6 years 6 years.
Codal life of tank wagons is 45 years.
BOGIE CONTAINER FLAT WAGON TYPE BLCA & BLCB
BASIC CHARACTERISTICS AND DIMENSIONS
The Bogie Container Flat Wagons have the following basic characteristics/leading dimensions.
S.No.Description ‘A’ Car ‘B’ Car
1. Track Gauge 1676 mm 1676 mm2. Estimated Tara Weight 19.10 t 18.00 t3. Payload 61.00 t 61.00 t4. Gross Weight 80.10 t 79.00 t5. Length over Headstock 13625 mm 12212 mm6. Width over sole bar at centre line of
wagon2100 mm 2100 mm
7. Distance between Bogie Centres 9675 mm 8812 mm8. Floor height 1009 mm 1009 mm9. Height of Centre Buffer Coupler
from Rail Level1105 mm -
10. Height of drawbar system from Rail Level
845 mm 845 mm
11. Wheel base 2000 mm 2000 mm12. Diameter f Wheel (New)/(Fully
Wom)840/780
mm840/780
mm
Salient features at a glance.
Bogie: High speed three piece cast steel bogie.
Floor Height: 1009 mm which is 266 mm less than IRS wagon height.
Axle Load: 20.32 tonne.
Carrying Capacity: 61.0 tonne (two 20’-O” or one 40’O” ISO container
on each wagon).
Maximum operating speed: 100 kmph.
Unit:.Each unit consists of 5 wagons, two “A” Cars at the ends and three “B’ Cars in the middle.
Rake: Rake consists of 45 wagons in the form of 9units. Length of each unit — 69 meters approximately.
Coupling: Outer ends of TMA Cars are fitted with standard Centre Buffer Couplers (CBC) inner end of A Car and both ends of B• car are fitted with slack less drawbar.
Brake Beam: Bogie is fitted with sliding type brake beam and brakehead is the integral part of brake beam. Compositionbrake blocks are fitted.
Wheel: Forged wheels and axles are used. Wheel dia New-840mm. Worn out-780 mm.
Air Brake System: It consists of
Single pipe graduated release Distributor valve fitted with empty load function Automatic slack adjuster Automatic load sensing device Brake cylinder pressure under tare 2.2 kg/cm2 and under loaded 3.8
kg/cm2 Control reservoir charged to 5 kg/cm2 Auxiliary reservoir charged to 5 kg/cm2 Initial charging of brake pipe at 5 kg/cm2.
Automatic Load Sensing Device (LSD): Two stage empty/ load braking is controlled by two nos. of change over valves type VTA fitted on each bogie bolster.
Automatic Twist Locks: Automatic twist locks are provided on the
wagon for securing containers for quick loading and unloading.
Bolster Suspension: Each group of helical spring consists of 7 outer springs, 6 inner springs and 2 snubber springs.
Spring Loaded Side Bearer Arrangements: It consists of two helical springs on each side bearer which bear 90% tare load.
SL No.
Features BLC BFKN BOXK/BOXKH
01 Wagon Unit Consist of wagon 2 nos. A-Car = 3 nos.
B-Car
Single wagon Single wagon
02 Platform hight from R.L.
1009 mm 1269 mm 1275 mm
03 Wagon length over head stock
A-Car 13625 mm
B-Car 12212 mm
13716 mm 12800 mm
04 Tare A-Car 19.10 tB-Car 18.10 t
20.5 t
19.5 t
05 Payload 61 t 61 t 48/60 t06 Wheel Dia 840 mm 1000 mm 1000 mm07 Type of bearing Tapered two row
15 Brake system Air brake Air brake Vaccum brake16 Brake cylinder
pressure3.8 kg/cm.sq loaded
2.2 kg/cm.sq empty
-
Comparison of CASNUB-22-NLB and Container Bogie Type LCCF2O(C) with
respect to similar and dissimilar features.
S.N. Description CASNUB-22-NLB
Container Bogle Type LCCF-20(C)
- 96
1 Centre Pivot Height from rail level 932 mm 715mm
2
Maximum height of side frame fromrail level
851 mm 786mm
3 Bottom of side frame from rail level 165mm 149mm
4 Height of side bearer top from rail level 921 mm 772mm
5 Wheel dia 1000-925 mm 401780 mm
6 Side frame design Cast steel design suitable for narrow jaw adapter
Cast steel design suitable for wide jaw adapter
7 Bolster Design Cast steel design- separate type centre pivot straight bottom.
Cast steel design integral fiat
type centre pivot
8 Design of centre pivots Separate pivots. IRS spherical type, assembled by rivets
Bottom pivot integral with bolster, flat type top pivot separate bolted to underframe.
9 Centre pivot liner No liner is provided
Manganese steel liners conforming to1RS-R-65-78 are provided at bottom and vertical
10 Side bearer Rubber type in a cast steel housing.
Friction type with coil springs in a cast steel housing.
11 Load bearing coil 12 outer and 8 springs inner Material IS:3195 60 Si7
l4outer and 12 inner springs. Material IS:3195 Gr.60S17
12 Snubber springs 4 Snubber springs Material lS:3195 Gr. 60 S17
4 Snubber spring Material 15:31 95 Gr50 CrMoV4
13 Brake shoe Conventional brake shoe Material cast Iron.
Non-metallic brake shoe.
14 Adapters Narrow adapter. Jaw Wide
jaw adapter.
SIMILARITY
Wheel base : 2000 mm Journal centres : 2260 mm Spring plank : Pressed plate design from 12 mm
plate Centre pivot bolt : Similar design. Wedge design.: Similar Cartridge bearing : Standard AAR Cartridge bearing
tyoperoller bearing Class-E.
Side frame key : Similar design. Bogie brake gear : Similar design in case of bogies
with CBC end but anextra equalizing lever has been provided in U-shape toconnect under frame bracket with 2 nos. Of end pull rods.
Elastomeric pads : Similar.
. BOGIE LOW PLATFORM CONTAINER FLATS (BLC)Bogie container flat wagons have been designed for transportation of 2896 mmhigh Series-I, ISO containers for a gross payload of 61t at an operating speed of 100km/h. These containers, when loaded on the earlier flat wagon caused infringement tothe X-class MMD, resulting in constraints in their free movement.In order to ensure that the wagons loaded with 2896 mm containers lie withinthe X- class MMD, a low platform height of 1009 mm has been achieved with the useof hybrid design of bogie frame and bolster and with the use of smaller diameterwheels (840mm).The wagons have all welded construction and are mounted on two cast steelbogies. The flats are formed into units of five wagons, each unit having two “A” car atends and three intermediate “B” cars. One end of “A” car is fitted with centre bufferWAGON MAINTENANCE MANUALCHAPTER 11 – SPECIAL TYPE OF WAGONS Ver. 2.0
Page 9 of 10couplers to ensure proper coupling with the locomotive while the other end hasslackless draw bar to couple with “B” cars. “B” cars are coupled together and to “A”cars by slackless drawbars.The length of A car is 1362 mm while the length of B car is 12212 mm. Thecoupler of A car for attaching to loco or other stock is at 1105mm. The coupler in theB car at both ends is at 845 mm from rail level. The wagons are equipped with AirBrake. The diameter of new wheel is 840 mm and the condemning size is 780 mm.
Fig 11.1TABLE 11.3 NEW WAGONSS.No. Stock Description1. BLCA/BLCB
