Rahee Turnouts & Track Devices 170720
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Rahee Track Technologies specializes in designing and
manufacturing Turnout Systems, Rail Expansion Joints, complete
layouts and turnout components like crossing and switch
devices for railway tracks, for high-speed, heavy haul, urban and
commuting railways, for required rail profiles and gauges as per
international standards.
Rahee is one of the leading supplier of Turnouts and special Track
devices to the Indian Railways. Rahee’s Turnouts and Track devices
have been successfully serving the Indian Railways for last 30
years. Rail Expansion Joints developed and patented by Rahee
have been adopted for mass usage across the Indian Railway
network and is in use for almost 20 years.
Rahee has been exporting Turnouts and special Track devices to
various countries for 20 years and has an excellent export track
record with overseas customers. Rahee’s products are in use in
Bangladesh Railways, Malaysian Railways, Srilankan Railways and
several other railways around the world.
Through modern engineering, exceptional quality and latest
technology, Rahee guarantees efficient and competitive designs
for a wide range of railway system, along with a sustainable
reduction in the cost incurred for superstructure maintenance and
increased turnout availability.
private sector Rail End
Forging facility in India
Machining capability
for rails upto
in length
First
18 m
OVERVIEW
TURNOUT SYSTEMS
The benefit of RTT’s Turnout Systems is
based on minimized life cycle costs by
~ high lifetime
~ low maintenance
~ high reliability
~ tailor made, specification-
confirming to designs
Primary considerations that Engineers at Rahee take
into account for designing are:
~ non-compensated horizontal
acceleration
~ cant deficiency variation
~ jerk
~ lateral load
~ axle load
~ speed
Points & Crossings suitable for various layouts
including Diamond Crossings with or without single
or double slips, Symmetrical switches, Turnouts
taking off from curve, Dual Gauge turnout, Single
Cross-over, Scissors cross-over etc. can be supplied.
SWITCHES
CROSSINGS
Curved and Trap
Switches
Rahee produces Curved Switches
as per the client needs. Curved
switch tongue rails are curved
according to the curvature of
the turnout from the toe to heel
of the switch. Curved tongue
rail allows for smooth turning
of trains, and are used for the
specific curvature for which they
are designed.
Trap switch is used to protect
main railway lines from
unauthorized vehicles moving
onto them from sidings or
branch lines. A single tongue trap
consists of only one tongue rail
assembled with one stock rail and
one single stock rail.
Thick Web Switches
These Switches are made from
specific asymmetrical Tongue
Rail sections, forged at the end
to match standard rail sections.
The transition from one section
to the other lies mostly in the
clamped area at the end of the
switch. Thus welding is not
required in the flexible area.
The length of the forging can
be adjusted to the specific
requirement such as welding,
insulated fishplating or
emergency fishplating. In order
to reduce setting forces and to
influence the elastic strength
of the switch, the base of the
switch rail is milled in the
flexible area.
Heat Treated Welded Crossing (HTW)
Rahee’s HTW crossing is a monolithic structure, where the
Vee is formed from two separate pieces of rails, with a steel
plate sandwiched in between. The plate is Electro-slag
welded and machined to form a solid nose. The weld metal
hardness, at the top of the rail head and in the weld cross
section, ranges from 330 to 360 BHN.
The Wing Rails are head hardened through induction
hardening method with subsequently controlled cooling,
to obtain fine pearlite grain structure. The Wing Rails and
the Vee are bolted together by high tensile bolts, to form
a complete HTW crossing. These crossings can withstand
axle loads as high as 25 tones under varying traffic
conditions and can be welded to the adjoining rails.
HTW crossing can be designed and manufactured as per
the client’s specific requirements. Rahee has supplied
various types of HTW crossings such as Acute, Obtuse,
Diamond, Curved, Extended Nose Type, and Crossings with
clothoidal entry.
Rail End Forging
Facility
Rahee’s rail end forging facility is
one of the most modern facility
with capacities to forge over
8000 rails annually. Rahee has
the ability to forge rails in various
lengths and rail sections including
60E1A1, 54E1A1 and many more
as per the client requirement.
Head Hardening
Facility
Rahee’s continuous inductive
hardening process hardens rails
up to 360 BHN and increases rail
strength from 900 kg/mm 2 to
1080 kg/mm
Rahee’s state-of-the-art facilities design and manufacture switches as per client’s requirements.
Rahee designs and manufactures Crossings as per Railway requirement.
Cast Manganese Steel
Crossings (CMS)
Rahee can design and supply Turnouts with
Cast Manganese Steel Crossings (CMS). CMS
Crossing has longer life, higher strength and
offers more resistance to wear. They can be
supplied with conventional fish plated joints
and in weldable joint format, as per client
preference.
In Weldable CMS, the crossing is welded
with the adjacent rails to run the continuous
welded rail (CWR) through Turnouts.
Weldable CMS crossings as compared to the
conventional crossing, offers higher service
life and better riding qualities.
Rahee Rail Expansion Joint design
is based on proven design of thick-
web switches which allows reciprocal
movement of both tongue rail and stock
rail up to 100 mm at each end along the
length.
Switch type expansion joint design is
proposed to eliminate the gap which
causes severe impact during the
movement of rolling stock. The basic
concept of this design is to provide a
curved guided path to uncut stock rail
by precise machining of tongue rail.
RAIL EXPANSION
JOINTS
Salient features of design:
~ Gapless & Boltless
~ No use of brackets
~ No machining of Stock
Rail
~ Use of thick web tongue
end forged rail
~ Use of standard
fastenings
In this design both thick web tongue
rails and stock rails are elastic fastened
through the entire length using
Canted chair.
Use of inner fastening for holding
stock rail on both sides minimizes the
possibility of dynamic gauge widening.
The tip of tongue rail is housed in the
recess under the head of stock rail
which is formed by machining of the
stock rail head. This reduces impact at
entry and wear at switch tip.
Glued insulated joints are used in tracks that meet certain requirements
regarding stability, good tamping and sleeper quality. It consists of glass
fibre cloth insulated fishplates, a corresponding number of insulated
high-tensile bolts and end post made of insulating material.
They can be assembled in-situ or at works. It meets International
standards for insulation resistance, pull load, deflection test, wet
insulation test etc. Every fabricated/ assembled joint is checked for
vertical and lateral alignment. Joints are subjected to insulation
resistance test in dry condition. Pull out test is also carried out at works
as a prototype test. The prototype test also includes insulation test in dry
condition and test in wet condition.
GLUED INSULATED
JOINTS
Advantages
~ Reduced wear in wheel
overrunning area
~ Reduced maintenance
costs
~ Reduced noise
~ Greater riding comfort
Types of sleepers
: Wood and concrete
Rail sections
: All common rail sections
Heat treatment of joints
: Hardened or preferably made from
head hardened rails
Bonding
: With appropriate bonding and
hardening agents
Manufacturing locations
: In the factory
Technical characteristics:
Ideal conditions regarding cleanliness,
temperature and manufacturing procedure
because rail ends and surface of steel parts to
be bonded must be spotlessly clean.
At site
As per client’s instructions.
~ Ease of installation
~ Lower noise and
maintenance
~ Excellent design for
Heavy Haul and other
applications
~ Low product life cycle
cost
RAHEE INFRATECH LIMITED
Registered Office :
Kemwell Manor, 5th Floor, 10/D/2 Ho Chi Minh Sarani,
Kolkata - 700 071, West Bengal, India
Phone : +91-33-2283 4042 Phone : +91-33-2668 3533/34
Fax: +91-33-2668 3737 Email: info@rahee.com
Branch Office :
408, Surya Kiran Building, 19 Kasturba Gandhi Marg
New Delhi - 110001, India
Works Unit-I
107, Lakhinarayan Talla Road, Shalimar,
Howrah - 711103, West Bengal, India
Works Unit-II & Unit-III
Village - Panchpara, P.O -Radhadsai, P.S- Sankarail,
Howrah - 711317, West Bengal, India
Works Unit-IV
N.H.6, P.O. Argori, Jangalpur Howrah - 711302,
West Bengal, India
Works Unit-V
NH-6, Opposite Ambuja Cement, Near Dhulagarh Truck Terminal,
Dhulagarh, Howrah, West Bengal, 711302
Works Unit-VI
PS – Dhenkanal Sadar, Vill – Padmanavpur PO – Saptasajya,
Dhenkanal -759013, Odisha, India
RAHEE TRACK TECHNOLOGIES PVT. LTD.
Registered Office & Works Unit - I
National Highway - 6, Post Office - Argori, Jangalpur,
Howrah - 711302, West Bengal, India.
Works Unit - II
Plot No. 173/A3 & B1, Survey No. 172 , IDA Bollaram, Jinnaram Mandal,
Sangareddy District, Hyderabad, Telengana – 502325, India
PANDROL RAHEE TECHNOLOGIES PVT. LTD.
Registered Office :
Kenwell Manor, 5th Floor, 10/D/2, Ho Chi Minh Sarani
Kolkata-700071, West Bengal, India
Phone: +91-33-2283 4042, Email: info@pandrolrahee.com
Corporate & Works
Plot No. 173/A3 & B1, Survey No. 172, IDA Bollaram
Jinnaram Mandal, Sangareddy District, Hyderabad
Telangana – 502325, India
Works
Master plot 3-A, Phase-III, WBIDC Plasto Steel Park
Barjora, Bankura – 722168, West Bengal, India
Phone: +91-83369 63718
www.rahee.com
design@innomedia.in
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