thermit Joint certificate.pdf

7/27/2019 thermit Joint certificate.pdf

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Thermit joint

Thermit joint, also known as exothermic bonding, thermite welding (TW), and Thermit

welding. There are many advantages of using Thermit joint. The most important one being that the

process produces a molecular joint and not just a mechanical one in between the conductors. It is

produced through a starting reactant which provides enough energy to activate the welding reaction.This takes place quickly and safely inside a graphite mould. The mould is designed specifically for a

certain union depending on the elements to be welded and the joint type required. We guarantees all

types of joints, not only copper cable unions but also to weld tapes, brass metallic pieces, stainless

steel, steel ground rods covered with copper, etc. It is especially useful for joining dissimilar metals.

Amiable Impex was the first Company in Mumbai to introduce and supply Thermit joint and

Accessories. AI-Weld Exothermic welded electrical connections supply from us will never loosen,

corrode or increase in resistance. We are one of the largest importer of Thermit joint in India. Due to

our Superior and Best Quality we are able to sell our product to Railways Contractors, Rail Metro,

Telecommunications, Earthing and Lightning Installers Industries, as well as to Electrical Suppliers etc.

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What does Thermit joint means?

Thermit joint System is a very effective and cost efficient method of making electrical connections in

high quality which includes Large Connection or Small Connection. It is a simple self-contained system

that uses the high temperature reaction of powdered copper oxide, aluminium and other required

chemical and materials, within a mould to form permanent electrical connections.For more details please visit our website: http://exothermic-welding.com/what-is-exothermic-

weld.html

Features of Thermit joint:

Superior electrical conductivity to the conductors themselves.

Does not corrode, oxidize or degrade with time and is resistant to galvanic coupling.

Able to withstand repeated electrical discharges.

Never increases its resistance.

Has greater mechanical and squeezing resistance than the conductors themselves.

What and Which Metal can be Weld through Thermit joint ?

The process of Thermit joint is a method of making electrical connections from Copper to

Copper or Copper to Steel and it can join any Metals to Metals like Bronze, Galvanized metals and

Stainless steel etc , in which no outside source of heat or power is required.

What are the Accessories Requires for Thermit joint Joints?

1) Graphite Mould

2) Thermit joint

3) Steel Disc

4) Ignite Powder / Starting Powder5) Cleaning Brush Set (Soft, Hard and File Card Brush)

6) Flame Torch

7) Mould Handle

8) Hand Gloves

9) Flint Gun

10) Sealing Compound

For more details please visit our website: http://exothermic-welding.com/exothermic-weld-

accessories.html

What is the Process for Thermit joint OR How the Metal is Welded by Thermit joint ?

In Thermit joint Process, the following are the steps

Step 1 - The two conductors that is to be joined are placed in the weld cavity and than the steel disc islocated in the base of the crucible in the Graphite Mould.

Step 2 - After the disc is placed in the Mould, AI-Weld Thermit joint Material is poured down into

Graphite Mould followed by Starting Powder

Step 3 - Some Ignite Powder should also be sparkled on the Mouth of Mould and than ignited by Flint

Gun.

The process of igniting the particles creates extremely high heat i.e upto 1400 degree Celcius

and produces Exothermic Reaction which also melts the Steel Disc and then the Thermit joint flows

into the weld cavity thus filling any available space and completes the weld. In weld cavity the molten

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copper alloy partially melts the conductors. The molten copper alloy gets cooled and forms a fusion

weld which solidify before it is removed from the mould.

This entire process takes only upto 10 to 15 seconds to complete. Then the mould is ready for

the next weld after a brief cleaning with a brush. Exothermic welded connections produce a permanent

connection, superior in performance to any known mechanical or pressure type surface-to-surface

contact connector. Due to the fact that the connection produced is a molecular bond so an exothermic

welded connection will not loosen and there will be increase in resistance over the lifetime of theinstallation.

The Process is very Simple and hence a Laymen can do the Job Work by just seeing the process

once. Hence one need to ensure that the process should be undertaken carefully and proper

instruction should be maintained by the Laymen.

For more details please visit our website: http://exothermic-welding.com/exothermic-weld-

process.html

What are the Advantages or Features of Weld done from Thermit joint

Molecular bonding of Copper to Copper and other metals can be made

Ensure excellent conductivity in the electrical grounding

Thermit joint Joint ensures permanent molecular bond

Longer life span

Not required any external power or heat source required

Safe operation, without professional technology knowledge, easy to learn

Very simple tools and equipment that results in execution of high efficiency

Will not deteriorate with age and will never loosen or corrode etc

Application

It is ideal for the following application:

- Earthing joints,

- Strip joints,

- Solid wire joints,

- Rod joints,

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- Cable joints,

- Lug connections,

- Cable and Rail joints,

- Continuity bonding and track circuiting, etc.

Hence this Thermit joint is used in Grounding & bonding and lightning protection in Power

plants , Substations , Transmission line , Refinery , Industrial plant , Commercial plants ,

Telecommunication tower , Building , Housing etc.

Type of Joints possible from Thermit joint:

1) Horizontal Joints

2) Vertical Joints

3) Straight Joints

4) Cross Joints

5) Overlap Joints

6) L shape Joints

7) T shape Joints

According to the customers specification and requirement any shape Joints is Possible through

our innovative design of Graphite Moulds.

Overview:

In Thermit joint, aluminium dust reduces the oxide of another metal, most commonly iron oxide,

because aluminium is highly reactive. Iron(III) oxide is commonly used:

Fe2O3 + 2 Al → 2 Fe + Al2O3

The products are aluminium oxide, free elemental iron, and a large amount of heat. The reactants are

commonly powdered and mixed with a binder to keep the material solid and prevent separation.

Commonly the reacting composition is 5 parts iron oxide red (rust) powder and 3 parts aluminium

powder by weight, ignited at high temperatures. A strongly exothermic (heat-generating) reaction

occurs that via reduction and oxidation produces a white hot mass of molten iron and a slag of

refractory aluminium oxide. The molten iron is the actual welding material; the aluminium oxide is

much less dense than the liquid iron and so floats to the top of the reaction, so the set-up for weldingmust take into account that the actual molten metal is at the bottom of the crucible and covered by

floating slag.

Other metal oxides can be used, such as chromium oxide, to generate the given metal in its elemental

form. Copper thermite, using copper oxide, is used for creating electric joints in a process called

cadwelding:

3 CuO + 2 Al → 3 Cu + Al2O3

Thermite welding is widely used to weld railway rails. The weld quality of chemically pure thermite is

low due to the low heat penetration into the joining metals and the very low carbon and alloy content

in the nearly pure molten iron. To obtain sound railroad welds, the ends of the rails being thermite

welded are preheated with a torch to an orange heat, to ensure the molten steel is not chilled during

the pour. Because the thermite reaction yields relatively pure iron, not the much stronger steel, some

small pellets or rods of high-carbon alloying metal are included in the thermite mix; these alloying

materials melt from the heat of the thermite reaction and mix into the weld metal. The alloying beads

composition will vary, according to the rail alloy being welded.

Exothermic Connection between Cable to Cable Joint



The AiWeld Thermit joint is the great quality product that helps to have permanent Joint between

Copper Cables to Copper Cable. Our Exothermic Powder works best for Copper Cable to Copper Cable

Connection.

Infact through our continuous innovative development and Quality Improvement Passion our AiWeld

Thermit joint can not only joint Copper to Copper Cable but also helps to Joint any Cables made from

any Metals. Following are the Joint Connection Possible from our AiWeld Thermit joint.

The Thermit joint which we supply is of Best quality and our company

Amiable Impex offer Thermit joint at very reasonable rate.

Our Thermit joint is ISO Certified, Crisil Verified and CPRI Government approved

products.

Quality Certificate:



1) CPRI - Short Circuit Current Test



Amiable Impex is the only Company in India that offer Quality AiWeld

Thermit joint at reasonable rate and ensures delivery within 10 to 15

days in India.

So Get high quality products at quickest lead time with fast response

time. Full Customer Satisfaction. Our Products are tested and approved

by CPRI Govt. Body and we are also certified by ISO 9001:2008

Regd. Office – AMIABLE IMPEX.

101/A, Surya Darshan, Pai Nagar,

Borivali(W), Mumbai – 400092. India.

Phone: 022-28933996 / 022-28957101

Fax: 022-28957102

Admin -

501/A, Surya Darshan, Pai Nagar,

Borivali(W), Mumbai – 400092. India.

Phone: 022-28933996 / 91-9594899995

MAULIK SHAH

E-mail: [email protected]

Mob :+ 91- 9594899995

UJJWAL SHAH

Email: [email protected]

Website - www.exothermic-welding.com

mailto:[email protected]

http://www.exothermic-welding.com/

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thermit Joint certificate.pdf

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