Arshan

What is Pentesting ?

There are commonly four phases to identify the vulnerabilities of a system

Scanning

This phase includes- scanning the network with various scanning tools, identification of open share drives, open FTP portals, services that are running, and much more.

Vulnerability Assessment

A vulnerability assessment is the process of defining, identifying, classifying and prioritizing…

What is Metal Inert Gas (MIG) Welding ? Principle of Operation

Definition :

It is an arc welding process wherein coalescence is produced by heating the job with an electric arc established between a continuously fed metal electrode and the job. No flux is used but the arc and molten metal are shielded by an inert gas, which may be argon, helium, carbon dioxide or a gas mixture.

Principle of Operation ( Semi-Automatic ) :

Before igniting the arc,…

Equipment Used in Tungsten Inert Gas Welding

(a) Welding Torch, Tungsten electrode and filler metal. (b) Welding power source, high frequency unit, DC suppressor unit and cables. (c) Inert gas cylinder, pressure regulator and flow meter. (d) Cooling water supply. (e) Water and gas solenoid valves.

Welding torch which may be air or water cooled, energises the tungsten electrode held in a collet and feed shielding gas to the weld puddle. When…

Tungsten Inert Gas (TIG) Or Gas Tungsten Arc Welding (GTAW)

Definition :

It is an arc welding process wherein coalescence is produced by heating the job with an electric arc struck between a tungsten electrode and the job. A shielding gas (argon helium, nitrogen, etc.) is used to avoid atmospheric contamination of the molten weld pool. A filler metal may be added, if required.

TIG Welding Equipments Principle of Operation :

Welding current,…

Operation and Equipment for Submerged Arc Welding

Operation :

Trigger is pulled and the flux starts depositing on the joint to be welded. Since the flux when cold is non conductor of electricity, the arc may be struck either by touching the electrode with the job or by placing steel wool bet ween electrode and job before switching on the welding cur rent or by using a high frequency unit.

Manually operated submerged arc welding gun

In…

Submerged Arc Welding | Definition, Principle, and Application

Definition :

It is an arc welding process where in coalescence is produced by heating with an electric arc or arcs set up between a bare metal electrode/electrodes and the job. The arc, end of the electrode and molten pool remain completely hidden and are invisible being submerged under a blanket of granular material (flux). The continuously fed bare metal electrode melts and acts are filler…

A Mealy state machine is a machine whose output depends not only on the input but also on the current state. It is used in designing the sequence detector which is a sequential state machine which takes an input string of bits and generates an output 1 whenever the target sequence has been detected.

Sequence detector is of two types:

Overlapping

Non-Overlapping

In an overlapping sequence…

What is Gravity Welding ?

Principle of Operation : 

In general, it is not easy to mechanize manual metal arc welding. The short length of the electrodes and the difficulties of controlling the arc length have hampered the development and exploitation of suitable systems. One technique which has been successfully used in a number of applications is gravity welding (in figure below).

Gravity Welding

The electrode…

I have walked enough, I have reached my late twenties but wait I don’t feel tired. but now I won’t chase. why?

So yeah, That 4 roomed some-what rectangular horizontal space that I always wanted to escape from for the attainment of my highest ambitions has lately put locks on my soar.

I wanted to flew higher but somewhere round this rectangular space has waved its magic wand and drew me…

Equipments, Advantages and Disadvantages of Flux Shielded Metal Arc Welding

Welding Equipment (MMAW) :

1. – (a) AC or DC welding supply, electrode holder and welding cables. (b) Welding electrodes, AC transformers and DC generators or rectifiers can be employed welding with covered electrodes. Both AC and DC power sources produce good quality welds, but depending upon welding situation one may be preferred over the other.

For example, at higher arc currents AC…

Flux Shielded Metal Arc Welding

Definition :

It is an arc welding process wherein coalescence is produced by heating the work piece with an electric arc set up between a flux coat electrode and the work piece. The flux covering decomposes due to arc heat and performs many functions, like arc stability, weld metal protection, etc. The electrode itself melts and supplies the necessary filler metal.

Principle of the Process :

Carbon Arc Welding | Definition and Types of Carbon Arc Welding

Carbon Arc Welding :

Introduction : Carbon arc welding may be classified as single electrode arc welding and twin carbon electrode arc welding. It may further be classified de pending upon the nature of shielding. Carbon arc welding may be carried out in air or under an inert atmosphere obtained through the use of a flux or an inert gas (i.e., argon, helium, nitrogen etc.).

Definition : Carbo…

Arc Welding | Types Processes, Advantages and Disadvantages of Arc Welding

Arc welding is a group of processes wherein coalescence is produced by heating with an electric arc or arcs, mostly without the application of pressure and with or without the use of filler metal depending upon the base plate thickness.

As by the definition arc which is terminated by electrode is used to melt the work pieces. It is possible by excess heat generation.

In the arc welding, the…

Oxy-Hydrogen and other fuel of Gas Welding

Introduction :

Though oxy-acetylene flame is the most versatile and hottest of all the flames produced by the combination of oxygen and other fuel gases, depending upon various factors as listed below, other gases such as Hydrogen, Propane, Butane, Natural gas, etc., may also be used for some welding and brazing applications. The factors are: 1. The type of material to be welded. 2. The required…

Gas Welding Torch or Blow Pipe and Welding Nozzles or Tip ?

Welding Torch or Blow Pipe :

Oxygen and the fuel gas having been reduced in pressure by the gas regulators are fed through suitable hoses to a welding torch which mixes and controls the flow of gases to the welding nozzle or tip where the gas mixture is burnt to produce carrying out gas welding operation, a flame for shows in given figure below different parts of welding torches.

There are…

Oxygen and Acetylene Pressure Regulators in Gas Welding

Oxygen and Acetylene Pressure Regulators :

The pressure of the gases obtained from cylinders/generators is considerably higher than the gas pressure used to operate the welding torch. The purpose of using a gas pressure regulator is, therefore 0 to reduce the high pressure of the gas in the cylinder to a suitable working pressure, and (m) to produce a steady flow of gas under varying cylinder…

Advantages, Disadvantages and application of gas welding

Advantages of Gas Welding :

It is probably the most versatile process. It can be applied to a wide variety of manufacturing and maintenance situations,

Welder has considerable control over the temperature of the metal in the weld zone. When the rate of heat input from the flame is properly coordinated with the speed of welding, the size, viscosity and surface tension of the weld puddle can be…