DOM Tubes | ERW Pipe | Tube Products of India

Tube Products of India is the most preferred supplier of precision tubes, Electric Resistance Welded (ERW) and Cold Drawn Welded (CDW), or Drawn over mandrel (DOM) tubes to major automotive companies in India and abroad.

It is the Market leader in Telescopic Front Fork Inner tubes and Cylinder bore tubes for shock absorber and gas spring applications, Propeller shaft tubes for Automotive segment. Other Specialty products include Rear Axle Tubes, Side Impact Beams, Tie Rods, Drag links, Heavy thick steering shafts and Hydraulic Cylinder tubes.

Thiruthani plant manufactures large diameter, high wall cold drawn & welded tubes. It supplies tubes for manufacturing of hydraulic cylinders used in construction equipment and off-highway vehicles. In Automotive segments, it caters to manufacturing of Propshaft & Dummy Axles for high payload trucks, besides general engineering & structural application with ERW tubes.

CR STEEL STRIPS Drawn over mandrel (DOM) tubes

The cold rolled division has a unique application driven approach to manufacturing steel strips. It develops application specific products that meet the precise requirements of the customer. The division adapts manufacturing process to provide customized solutions for each and every esteemed client.

The cold rolled division is guided by strong development team, technical expertise, a keen knowledge of the customer specific requirements and stringent adherence to quality. Propelled by a unique model of manufacturing practices and customer satisfaction, cold rolled steel division is all set to become a leading force in the specialty CRCA steel strips market

Width	10 mm to 980 mm
Thickness	0.25 mm to 7 mm

PRECISION TUBES Drawn over mandrel (DOM) tubes

TPI has been a leading producer of precision steel tubes in India more than 60 years. Its pioneering spirit has made it the undisputed leader with the largest product range of ERW and CDW precision steel tubes.

TPI’s manufacturing process, extensive product range, technical expertise, stringent quality assurance and the pioneering spirit reflects the force behind its leadership in the precision steel tube industry

ERW (Electric resistance welded) Drawn over mandrel (DOM) tubes

OD	15.88 mm to 168.3 mm
Thickness	1 mm to 12.7 mm

CDW (Cold Drawn Welded)

OD	8 mm to 160 mm
Thickness	0.71 mm to 11.5 mm

TUBULAR COMPONENTS D rawn over mandrel (DOM) tubes

SIDE IMPACT BEAM Drawn over mandrel (DOM) tubes

A safety member installed in doors of passenger cars to protect occupant from side impacts during accidents

Design Facts / Limitations:

Door deformation is reduced resulting in space creation for side air bag actuation between the vehicle door and the occupant.
Packaging needs to be considered for locating the side impact beam
Needs to have corrosion resistance property Major share of business for SIBs with Indian OEM’s Maruti, Toyota, Renault Nissan, Hyundai, Mahindra and Tata motors. Leaders in this field more than a decade.

Requirements of SIB:

Absorb energy from impact
Reduce peak force during impact.
Stiffness

Process	UTS	YS	EL
	(MPa)	(MPa)	(%)
Heat treatment	1735	1400	5
	1470	1100	8
	1200	1000	8
	1100	900	10
	500	410	15

DRAGLINK Drawn over mandrel (DOM) tubes

A Draglink converts Rotary motion from Crank to link in a different axis or plane.

Design Facts / Limitations

Packaging needs to considered for locating the Draglink.
Corrosion resistance property.
End condition fitment requirements.
Length of Draglink can affect geometry and thus the steering Ratio.

Requirements of Draglink

To meet End load conditions
Stiffness

Product Strength Manufacturing Range

Description	Range
OD	Ø32 – Ø60 mm
Thickness	4.5 – 6.0 mm
Length	550 – 1990 mm
Strength (UTS)	900 MPa
Strength (YS)	700 MPa

STEERING SHAFT Drawn over mandrel (DOM) tubes

Part of steering system in an automobile, connecting steering wheel to the steering column

Requirements of Steering Shaft

Meet the torque specification.
Energy dissipation management in the event of a frontal collision.

Advantages with TPI:

Engineering of tubular shafts to replace solid shaft resulting in light weighting.
Meets international specification & developed as import substitute.
Achieved mechanical properties through combination of cold working and/or heat treatment

Description	Range
OD	Ø19 – Ø25.4 mm
Thickness	1.8 – 3.0 mm
Length	180 – 320 mm
Strength (UTS)	480 MPa

ROPS Drawn over mandrel (DOM) tubes

ROPS refers to operator compartment structures (usually cabs or frames) intended to protect equipment operators from injuries caused by vehicle rollover.Found in tractors, earthmoving machines, and ATVs used in construction, mining & agriculture.

Found in tractors, earthmoving machines and ATVs used in construction, mining & agriculture.

Advantage with TPI :

High strength tubes meeting energy absorption & impact load requirements.
Cold drawn to profile shapes and formed to final profile using CNC bending machine.
Ready to weld condition for cabin manufacturers

COLLAPSIBLE SPACER

Safety component requiring control of material and mechanical properties.

Design Facts / Limitations

A thin walled steel tubular member used between pairs of spaced bearings or shafts to keep them preloaded with the limiting axial stiffness.
Self collapsing member at excess load, to prevent the bearing failure.
Used in axle assembly of commercial

Advantage with TPI

Engineering of tubular spacers to replace cast/forged components.
Meets international specification & developed as import substitute.
Achieved narrow band mechanical properties through combination of cold working and/or heat treatment.

Manufacturing Size Range

OD (mm)	Ø18 – Ø42
Thickness (mm)	1.60 – 2.50
Length (mm)	18 – 45

WHEEL HUB SPACER

A safety member installed in the wheel hub axles of commercial vehicles to prevent from bearing failure.

Design of Tubular Spacer

Conventionally manufactured by casting.
Tubular Wheel Hub Spacer – formed through press route and machined to final profile.

Requirements of Spacer

High compressive strength.
Smooth surface finish.
Closer tolerance for fitment purpose.

Product Manufacturing Range Drawn over mandrel (DOM) tubes

Description	Range
OD	Ø65 – Ø108 mm
ID	Ø56 – Ø96 mm
Length	60 – 120 mm
Strength (UTS)	480 min MPa

REAR AXLE TWIST BEAM

The twist beam rear suspension unit is a type of automobile suspension where the cross beam holds the two trailing arm together and provides the roll stiffness of the suspension by twisting as the two trailing arms move vertically relative to each other.

Design Facts / Limitations

Fewer bushings than multi-link suspension that is less stressed and prone to wear
Fairly light in weight
No need for a separate anti rolls bar the axle itself performs that function

Performance Testing:

Eddy Current Testing, Ultra Sonic Testing, Cone Testing, Flattening Test, Micro Testing, UTS & YS testing.
Cold forming followed by torsional fatigue testing of REAR AXLE TWIST BEAM

Manufacturing Size Range

Description	Range
OD(mm)	Ø 80 – Ø108.6
Thickness(mm)	2 – 3.5
Length(mm)	1000 – 2000

TIE ROD

It is a part of steering mechanism which transmits force from the steering center link or the rack gear to steering knuckle.

Design Facts / Limitations

Higher strength compared to the conventional rod result in smaller diameter with same load bearing capacity
Supplied under ready to install condition

Performance Testing:

Eddy Current Testing, Ultra Sonic Testing, Cone Testing, Flattening Test, Micro Testing, UTS & YS testing

Manufacturing Size Range

Description	Range
OD(mm)	Ø25 – Ø60
Thickness(mm)	3 – 6
Length(mm)	500 – 3000

PROPELLER SHAFT

The propeller shaft connects the transmission shaft to the pinion shaft at the wheel axle. The propeller shaft is also called driveline shaft or drive Shaft

Design Facts / Limitations

It transmits rotary motion of the gearbox output shaft to the differential and then to the wheels through the axle shafts.
It transmits motion at an angle which is varying frequently.
It accommodates changes in length between gear box and rear axle.

Performance Testing: