Inhouse Manufacturing

RAHUL GROUP is having dedicated facility for manufacturing Stainless Steel Welded Tubes using High Speed 3 Torch TIG Welded Mill.

The manufacturing facility is equipped with the state of art Coil Slitting Line, which plays an important role for manufacturing welded tubes. RAHUL GROUP is having the latest generation Tube Mills using On-Line Bright Annealing, On-Line Eddy Current Testing, Two Axis Dimension check including ovality resulting into closer dimensional control.

RAHUL GROUP is also having facility of High Speed Draw Benches for manufacturing Welded and Cold Drawn Tubes in Austenitic and Duplex Stainless Steels in longer length, Off-Line Bright Annealin , Off-Line Eddy Current Testing,Off-Line Ultrasonic Testing etc.

RAHUL GROUP manufactures Austenitic, Super Austenitic ,Ferritic , Super Ferritic, Lean Duplex, Duplex and Super Duplex, Stainless Steel Welded Tubes.

Common Features :

Good Surface Finish like Outside Polished and Bright Annealing

Good Corrosion Resistance

In-house “U” bending facility and “U” bend stress relieving

Ability to produce tubes with stringent NDT requirements of the Client

Ability to handle various Grades of Stainless Steel

Stabilization Heat Treatment facility for Stabilized Stainless Steel Grades

Salient Features:

Power Plants

Stainless Steel Welded Condenser Tubes

Capabilities to manufacture tubes having wall thickness from 0.60 mm to 2.00 mm.

Straight Length upto 25 meters

Stainless Steel Seamless LP and HP Heater Tubes

Capabilities to supply tubes with Very Low Residual Stress Values leading to longer service life

Capabilities to manufacture tubes having wall thickness from 0.60 mm to 2.00 mm

Closer dimensional tolerances

Dedicated facility for manufacturing Tubes in U bend Solution Annealed condition upto developed length of 36 meters

Capabilities to supply Ferritic Stainless Steel tubes for Nuclear Power Plant

Stainless Steel Welded HP Heater Tubes

Capabilities to supply tubes with Very Low Residual Stress Values leading to longer service life

Fully recrystallized microstructure in weld, improving corrosion resistance of Heater Tubes

Closer dimensional tolerances due to Cold drawn tube

Dedicated facility for manufacturing Tubes in U bend Solution Annealed condition upto developed length of 36 meters

Capabilities to supply Ferritic Stainless Steel tubes for Nuclear Power Plant

Capability to supply tubes with Special Chemistry

General Industries

Manufacturing capabilities to supply Ferritic Stainless Steel tubes for Desalination Plant

Manufacturing capabilities to supply Duplex Welded and Cold Drawn Tubes for Oil and Gas Sector

Manufacturing capabilities to supply Lean Duplex tubes for Process Industries

RAHUL GROUP is one of the major manufacturers of Stainless Steel Seamless Pipes for application in Power generation-Nuclear, Thermal and Solar , Refinery and Petrochemical,Oil and Gas, Chemical and Fertilizer and Process Industries.

We manufactures Austenitic, Super Austenitic, Duplex and Super Duplex Seamless Stainless Steel pipes.

Salient Features:

Seamless Pipes manufacturing using Cold Rolling facility up to 12″NB

Cold Draw bench facility up to 8″ NB

Solution Annealing Heat Treatment facility up to 12″ NB

Various grades offered : Austenitic , Super Austenitic ,Duplex ,Super Duplex Stainless Steels

Stabilization Heat Treatment Facility for Stabilized Grades

RAHUL GROUP is one of the major manufacturers of Welded Stainless Steel Pipes for application in Power generation – Nuclear, Thermal and Solar, Refinery and Petrochemical, Oil and Gas, Chemical and Fertilizer and Process Industries etc.

We manufactures Austenitic, Super Austenitic, Duplex and Super Duplex welded stainless steel pipes both from coil and plate. The weld procedures used are TIG, Combination of Plasma and TIG , TIG with filler , TIG and SAW , SAW depending up on the wall thickness of input raw material for Pipe manufacturing.

RAHUL GROUPhave number of tube mills for manufacturing Stainless Steel Welded Pipe from Stainless Steel coils upto 18″ NB in double random length. The welding process is controlled by laser seam tracking equipment to optimize the quality of weld seam. Stainless Steel Welded Pipes above 40″ NB & up to 72″ NB can be manufactured with a combination of longitudinal / circumferential joints.

A complete range of testing facility in-house contributes to consistent quality control. With good investment in modern forming & welding techniques, Ratnamani is able to meet the most stringent market demands in terms of quality and delivery.

Salient Features:

Radiography/Radioscopy to ensure Welding quality

Solution Annealing Heat treatment facility upto 12” NB

Hydro Test

Ultrasonic and Eddy Current Test can be done as per Client requirement

In-house testing facility to meet International Standard

Various Sizes and Grades of Austenitic , Super Austenitic ,Duplex and Super Duplex Stainless Steel

RAHUL GROUP have dedicated facility for manufacturing Stainless Steel Seamless Instrumentation & Heat Exchanger & General Purpose Tubes.

The Hot Extruded Mother Hollows are used for manufacturing Stainless Steel Seamless Instrumentation Tubes using Cold Pilger Mills, modern Draw Benches and Off-Line Bright Annealing furnaces. Our facility to supply tubes with lower residual stress values, which plays an important role in service life of Seamless Heat Exchanger Tubes.

Tubes are used to connect various pressure gauges, pressure switches, valves and flow monitors on industrial piping and ventilation systems. Various type of fluids , gases pass through these tubes at high pressure. Considering above factors the application for Instrumentation Tubes is considered as ‘very critical’.

RAHUL GROUP is one of the major manufacturers of Stainless Steel RAHUL GROUP is having dedicated facility for manufacturing Tubes in U bend Solution Annealed condition upto developed length of 36 meters.

Salient Features:

Mother Hollows are used to manufacture tubes for producing finished tubes

Ability to produce tubes with

– Closer Dimensional Tolerances

– Closer hardness values

– Special chemistry as per customer requirements

– Stringent NDT Testing including Ultrasonic Testing, Eddy Current Testing etc.

Good surface finish , Bright Annealing & Polished Surface

Good Corrosion resistance

In-house “U” bending facility and “U” bend Stress relieving

Ability to produce tubes with stringent NDT requirements of the Client

Ability to handle various Grades of Stainless Steel

Power Plants

Stainless Steel Seamless Condenser Tubes

Capabilities to manufacture tubes having wall thickness 0.70 mm

Straight Length upto 25 meters

Stainless Steel Seamless LP and HP Heater Tubes

Capabilities to supply tubes with Very Low Residual Stress Values leading to longer service life

Dedicated facility for manufacturing Tubes in “U” bend Solution Annealed condition upto developed length of 36 meters

Ability to supply tubes with Special Chemistry

Capability to supply tubes of special grades for Nuclear Power Plants

Oil and Gas Sector

Ability to produce tubes with stringent NDT requirements of the client

Stabilization Heat Treatment facility for Stabilized Stainless Steel Grades

Fertilizer Plant

Capability to supply Urea Grade Tubes 316L UG and UNS S31050

Any other special grade can be developed on request

Instrumentation

Seamless Instrumentation Tubes for applications in Power generation i.e Nuclear, Thermal and Solar Power Plants , Refinery and Petrochemical, Oil and Gas, Chemical and Fertilizer, Process Industries , Defense , Atomic Energy, Aerospace ,Automobile , Pulp and Paper Industries etc.

 General Industries

Capabilities to supply Lean Duplex tubes for Process Industries

Carbon Steel Cold Finished Seamless Straight Tubes / Pipes

 SIZE RANGE

Outer Diameter 6 mm – 114.3 mm

Thickness 0.7 mm – 10 mm

Length MAX 25 mtr.

Carbon Steel Cold Finished Seamless u TUBES :

 SIZE RANGE

Outer Diameter 12.70 mm – 60.30 mm

Thickness 1.24 mm – 5 mm

Radius 1.5D to 1 Mtr

Carbon steel cold drawn seamless U-tubes as per

  TEMA CODE (‘U’ Tube used in Heat Exchangers)

  ASTM A 556 / SA 556 (‘U’ Tube used in Tubular Feed Water Heaters)

RAHUL GROUP is one of the major manufacturers of Stainless Steel Seamless Pipes for application in Power generation-Nuclear, Thermal and Solar , Refinery and Petrochemical,Oil and Gas, Chemical and Fertilizer and Process Industries.

We manufactures Austenitic, Super Austenitic, Duplex and Super Duplex Seamless Stainless Steel pipes.

Salient Features:

Seamless Pipes manufacturing using Cold Rolling facility up to 12″NB

Cold Draw bench facility up to 8″ NB

Solution Annealing Heat Treatment facility up to 12″ NB

Various grades offered : Austenitic , Super Austenitic ,Duplex ,Super Duplex Stainless Steels

Stabilization Heat Treatment Facility for Stabilized Grades

RAHUL GROUP have number of tube mills for manufacturing Stainless Steel Welded Pipe from Stainless Steel coils upto 18″ NB in double random length. The welding process is controlled by laser seam tracking equipment to optimize the quality of weld seam. Stainless Steel Welded Pipes above 40″ NB & up to 72″ NB can be manufactured with a combination of longitudinal / circumferential joints.

A complete range of testing facility in-house contributes to consistent quality control. With good investment in modern forming & welding techniques, Ratnamani is able to meet the most stringent market demands in terms of quality and delivery.

Salient Features:

> Radiography/Radioscopy to ensure Welding quality

> Solution Annealing Heat treatment facility upto 12” NB

> Hydro Test

> Ultrasonic and Eddy Current Test can be done as per Client requirement

> In-house testing facility to meet International Standard

> Various Sizes and Grades of Austenitic , Super Austenitic ,Duplex and Super Duplex Stainless Steel

Background of Titanium

In 1791, an England minister William Gregor found a new metal in magnetite. A German Chemist M.H.Klaproth found this metal in 1795 while researching TiO2, and named it Titans. In the year of 1910, an American scientist first made pure titanium by commenting TiCI using Natrium. A Luxembourg scientist W.J.Kroll made Pure titanium by using magnesium in 1940. Since then, magnesium commenting and natrium commenting become the ways of manufacturing titanium sponge in industry. America manufactured 2 tons of titanium sponge by magnesium commenting in 1948. And then England, Japan China started manufacturing in large quantity.

Titanium is a new metal, and is widely used because of its superior property, including aero space, chemical processing, petroleum, light industry, metallurgy, power generation and other industries. It is strong, and tensile strength of pure titanium can be 180kg/mm2. Titanium alloy have good thermal stability and low temperature toughness, so it is applied in plane engine, rocket and missile. In petroleum industry, it is mainly used as containers, reactors, heat exchangers, vaporizers, pipes and valves. Titanium is also used as electrode and radiator and pollution control apparatus. In medical industry, it can be made as bones and some other apparatus. Titanium pigment is superior material of pigment and paint.

Basic information of titanium

It lasts more than one hundred years from discovering titanium to making pure titanim products. Actual application of titanium starts from last 40′s. 0.6% of the 10 kms’ stratum is titanium which is 61 times of copper. A titanium mine of more than 10 mt is not uncommon. On the beaches there are billions tons of sands, and titanium and zirconium is mixed in the sands. With the washing and pushing by the sea for millions of years, titanium and zirconium are washed togather along the sea side.

Titanium is not magnetic, so titanium made nuclear don’t need to worry about magnetic mines.In the year of 1947, People started smelting titanium in the factories, and the total out put is merely 2 tons. In 1955, the out put rushed to 20,000 tons. In 1972 the quantity rised 200,000 tons. Titanium is almost as strong as steel, but its density is half of steel. Titanium is a bit heavier than aluminum, but it’s 2 times stronger than aluminum. Now titanium replaces steel in large quantity in rockets and missiles.

Titanium has good heat resistance with its melting point 1725℃. In the normal temperature, titanium can keep good condition in various strong acid and alkali, even in aqua fortis. Titanium don’t fear the sea water. Someone made a experiment. He leave a brick of titanium in the seabed, and it is still shining as it is taken out 5 years after that. Now titanium is utilized in the manufacturing of submarine. Because of its high strenth, titanium made submarin can sail in the 4500 meters’ deep sea.

The largest problem of titanium is hard to extract. Because titanium is very easy to combine with other elements, such as oxygen, carbon and nitrogen. So we must keep these elements away from titanium during either smelting or casting. While smelting titanium, air and water are forbiden to get close, and even alumina crucible is not utilized. Because titanium will get the oxygen from alumina. In fact this property is used in smelting steel. While smelting steel, titanium is put into molten steel, so that nitrogen will be combined first with titanium before steel. This process makes the steel pure.

When supersonic speed planes is aviating, its wings’ temperature may rise to 500 ℃. Although high heat resistant aluminum alloy is used to make the wings, it can’t work if the temperature is high than 300℃. Titnaium can meet this extreme requirements. It’s light, strong enough and can keep will at the extreme high temperature.

Titanium dioxide is a kind of white powder, and is the most white object and best white pigment. One gram of titanium dioxide can make an area of 450 mm2 extreme white. It is 5 times whiter than normal white pigment.

COLD DRAWN SEAMLESS Titanium Tubes

Titanium has unique set of properties that makes it suitable for variety of applications in Power plant , Desalination plant and Process Industries etc . It has a high environmental resistance , relying primarily on a very thin , tenacious and highly protective surface oxide film . Titanium is highly resistant to wet chlorine chemicals , practically all salt solutions , sea water , a range of acids , organic and inorganic chemicals and gases. The same oxide film provides a high resistance to erosion in high velocity process streams. The corrosion and erosion resistance makes titanium a preferred heat transfer material for shell/tube heatexchanger , as it permits the use of thin heat transfer walls and high fluid flow rates . In addition titanium has only half the density of steel. It is non magnetic and is characterized by a high melting point , high strength to weight ratio and low modulus of elasticity.

RAHUL GROUP is having facility for manufacturing Titanium Tubes. Off line bright annealing and eddy current testing facility.

Available in various Grades as per ASTM/ASME B- 338

Length up to 20 metres

All tubing can be supplied in Straight length and “U” bend condition

Non destructive testing include Ultrasonic Testing , Eddy Current Testing and Hydro Test and Air Under Water Test

Tubes are normally supplied in Seamless , Annealed and Cleaned condition

Alloy Steel Cold Finished Seamless Straight Tubes / Pipes

SIZE RANGE

Outer Diameter 6 mm – 114.3 mm

Thickness 0.7 mm – 10 mm

Length MAX 25 mtr.

Alloy Steel Cold Finished Seamless u TUBES :

SIZE RANGE

Outer Diameter 12.70 mm – 60.30 mm

Thickness 1.24 mm – 5 mm

Radius 1.5D to 1 Mtr