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Lancing Equipment

We offer Lancing Equipment. Oxygen is used in the manufacture of metals like Steel, Copper and Zinc. Chlorine is used in the manufacture of Aluminium. These gases react with the undesirable impurities and form their respective oxide or chlorides. These oxides or chlorides then float to the surface of the molten metal and are removed.



Cutting Lance

The underwater Cutting Lance has many uses in industry for both dry and wet applications alike, such as cutting steel bracings on offshore structures, pipelines, removing jetty and pier foundations, cutting through concrete caissons, vessels, propellers and other types of marine salvage. Each lance is constructed from a copper coated seamless steel tube 9.5mm (3/8") OD x 450mm (18") long. The tubes are all fitted with high visibility polyolefin tubing for easy use and improved safety. All underwater Cutting Lances are packed to prevent oil and grease contamination.

It will cut through the following materials with ease :

  • Plain carbon & low-alloyed steels
  • Cast irons
  • Stainless steels
  • Non-ferrous metals
  • Concrete, rock, rope, wood and marine growth

The process simply requires an industry standard underwater cutting torch connected to a multistage high flow oxygen regulator, a DC welding machine and a safety isolation switch. Should you prefer to cut with the power on, the lance should require no more than ~150 amps at the tip. However, the lance will also burn with no electrical power, once ignited, as long as the oxygen flow is maintained. The lance burns at approximately 4000°C  a temperature that will melt most materials with ease. The principle of operation, having ignited the arc is to allow oxygen to flow down through the centre of the lance. This creates and maintains an exothermic reaction, which will continue to burn, with or without the power, until the oxygen flow is stopped.

Thermal Lances

Thermal Lances is used as one of the methods of boring and severing steel, cast iron, copper, aluminium, concrete and hard to clean materials without noise or vibration in a fraction of the time taken by conventional methods. The equipment is extremely simple and easy to operate, and the capital cost in comparison to drills etc. is negligible.

Process:
The addition of power steel rods in packed form to a lance pipe, provides a greater ratio of iron to oxygen, thus providing sufficient heat to melt ferrous and non-ferrous materials. The lance is ignited by applying heat to the lance end with an oxygen-acetylene equipment. The temperature reached in the center of the combustion zone is around 4000 °C, greater than the melting point of any substance of Earth! The heat generated form the iron/oxygen reaction is sufficient to melt concrete, steel or refractory, as the melting point of most materials varies between 1800-25000 °C.

Oxygen is continuously fed through the length of steel tube, usually ¼”, 3/8” or ½” NB, and the burning end of the lance is aimed at the spot on the material where it has to be cut. At the burning end, the oxygen combines with the iron to from a slag rich in iron
oxides.

The slag produced is very fluid which enables cutting and boring to take place. The flow of slag is
assisted by the velocity of the gas and vapours expelled within it.The cutting is a manual process. Thus it depends a lot on personal skill. Proper training and safety gear is a must. Equipment Consists of :

Steel tube packed with special steel rods (Aluminum or Magnesium are often added to the packing to increase the heat output)

Lance Holder:
Contains a gas control valve, flame arrestor and holder. The lance fits into holder

Oxygen Supply:
Usually connected to three or more 250kPa to 800 kPa, 8 / 9 m capacity cylinders

The lance can easily be connected to the oxygen supply pipeline where available. For bigger jobs, liquid oxygen cryogenic flasks can also be used.

  • Oxygen/Acetylene torch for heating the end of the lance
  • High Pressure Oxygen Regulator
  • High Pressure Oxygen Hose
  • Protective Clothing and Headgear

Boring Operation To start the operation, the end of the lance is heated to ignition temperature by
means of and Oxy/Acetylene torch. Oxygen is then fed through the lance promoting fusion at the lance point, and the reaction becomes self supporting. The heat generated fuses the lance and the flow of slag is assisted by the velocity of the oxygen. The boring operation is not difficult, the lance being fed into the hole as boring progresses. Holes 3 meters in length can be bored horizontally,although it would be better to incline the object, if possible, to allow the slag to flow freely out.

Boring vertically down can be carried out successfully, but after the first 300 mm the oxygen
pressure has to be increased to expel the molten slag. The slag produced will be expelled from the front until the complete thickness has been pierced. When starting, if a free edge is not available to commence boring then the technique is to pierce a hole through completely in the middle. When boring, the lance is kept aimed slightly downward and the slag kept in motion by a forwards and backwards motion. Sand placed beneath the slag will protect the floor.

Connections:
All connections are threaded as per BSPT Standards. Both ends are threaded. A coupling is provided at one end and a PVC cap at the other end. As a safety measure, the filled wires are terminated 50 mm away from the edge of the pipe at the holder end. 6 mm and 10 mm lances are with threaded ends. All accessories like holders, regulators, hoses and safety equipment is also available.

Lance Holder

An A-grade gamut of Lance Holder can be availed from us within reasonable prices. These lances are manufactured using impeccable quality metals, that have high resistance to abrasion and corrosion. Our lances are developed by experienced professionals, whose efforts help in shaping accurate designs.

Lancing Pipes

Oxygen is used in the manufacture of metals like Steel, Copper and Zinc. Chlorine is used in the manufacture of Alumina. These gases react with the undesirable impurities and form their respective oxide or chlorides. These oxides or chlorides then float to the surface of the molten metal and are removed.

To transfer these gases to the molten metal, a pipe is needed. This pipe is the Lancing Pipe and the process of injecting gases into molten metal is known as Oxygen Lancing.

Traditionally an ordinary Pipe has been used. The material of construction is Low Carbon Steel ( Mild Steel ) , Electrically Resistance Welded ( ERW ) in the shape of a pipe. Since the molten metal is Steel or Copper or Zinc, and the pipe is of Mild Steel, the pipe melts into the Molten Metal, at the end which is dipped into it . Besides because of the high temperature of the Molten Metal, the pipe also gets oxidized and melts faster into the Molten Metal. Hence the pipe gets consumed and has to be replaced.The rate of replacement decides the cost of production.

Calorised Pipes

We supply Calorised Pipes which are given inner and outer surface calorising treatment under high temperature in which diffusion of non ferrous metals takes place into the surface of steel.

The calorised pipes offer characteristics such as :

  • Higher life
  • Corrosion Resistance
  • Lower downtimes
  • Higher capital cost but with higher life and efficiency, a better and cheaper alternative

Our range of Calorised pipes find their use in areas where high temperature and corrosive atmosphere are the norm.


Applications are :


  • Heat exchangers, handling hot and corrosive gases
  • Finned tubes
  • Gas ducts for SO2 /H2S gases
  • Reformer tubes
  • Regenerator tubes
  • Refinery Flue gas tubes
  • Ethylene Pyrolysis furnace tubes
  • Oxygen lancing pipes in Alloy Steel Melting Shops
  • Copper Smelters, Zinc Smelters, Lead Smelters, Tin Smelters
  • Thermo Wells

Our calorised pipes are customized as per the requirement and as per the industry the operating and physical parameters are changed. We offer calorised pipes with following specifications :
  • Lowest Diameter : 13.2 mm OD
  • Highest Diameter : 400 mm OD
  • Length : 6 meters

 

Agya Sales Corporation

Mr. Aman Aggarwal
No. 206- A, Shradhanand Building, 2nd Floor, No. 272/74, Samuel Street, Vadgadi
Mumbai - 400003
Maharashtra, India
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