Welding

Our tutors have a vast amount of knowledge and real world experience between them within this industry. They have the qualifications and are fully coded welding tutors and teach the most up-to-date welding techniques – everything from basic welding skills for beginners to advanced welding techniques for experienced welders looking to build on their expertise.

All trainees will have the opportunity to get certification in all the major welding processes. On completion of training, welders will be tested and certified in accordance with the requirements of BS EN ISO 9606-1:2013 (formerly BS EN 287-1:2011) and / or ASSME IX. All tests are in accordance with BS EN ISO 15614-1:2004. On successful completion of our courses you will have the skills needed to gain employment in the welding industry.

We also offer courses for those looking for refresher training on a specific aspect of welding.

TIG Welding
TIG welding is an electric arc welding process in which the fusion energy is produced by an electric arc burning between the workpiece and the tungsten electrode. During the welding process, the electrode, the arc and the weld pool are protected against the damaging effects of the atmospheric air by an inert shielding gas.  By means of a gas nozzle ,the shielding gas is lead to the welding zone where it replaces the atmospheric air. TIG welding differs from the other arc welding processes by the fact that the electrode is not consumed like the electrodes in other processes such as MIG/MAG and MMA.

MIG / MAG
The Metal Inert Gas (MIG) or Metal Active Gas (MAG) welding is a semi-automated process, widely used in many sectors of industry, such as Fabrication, Structural, Shipbuilding, Railroad construction and production of heavy plants and machinery.

The process melts and fuses metals using the intense heat generated by an electric arc between the metals to be joined and a filler wire (solid or flux cored).  The wire is progressively melted at the same speed at which it is being fed by the wire feeder and forms part of the weld pool.  Both the arc and the weld pool are protected against atmospheric contamination by a shield of inert (non-reactive) gas.

MMA
Valued for its flexibility, MMA is one of the most commonly used welding processes.

It is used on a daily basis by DIYers, Tradesmen, Security Metalwork Specialists and Metal Fabricators, as well as on pipe laying work sites.  MMA welding consists of creating a high-intensity electric arc between a shielded metal-cored electrode and the metals to be joined.

The filler metal is transferred by an electric arc between gushing soul of the coated electrode and the workpiece

The heat generated by the electric arc simultaneously melts the base metal (workpiece), the metal core and the coating of the electrode, creating the melt which collects drops of filler metal and molten slag transferred into the plasma of this arc.  Part of electrode components is volatilized, helping to create the atmosphere in which the arc is struck.  The molten coating, low-density covers the melt forming the slag which protects the weld metal during and after solidification.

ORBITAL WELDING
In the orbital welding process, tubes/pipes are clamped in place and an orbital weldhead rotates an electrode and electric arc around the weld joint to make the required weld.  An orbital welding system consists of a power supply and an orbital weldhead.

Power Supply: The power supply / control system supplies and controls the welding parameters according to the specific weld program created or recalled from memory.  The power supply provides the control parameters, the arc welding current, the power to drive the motor in the weld head and switches the shield gas(es) on/off as necessary.

Weld Head: Orbital weld heads are normally of the enclosed type and provide an inert atmosphere chamber that surrounds the weld joint.  Standard enclosed orbital weld heads are practical in welding tube sizes from 1/16 inch (1.6mm) to 6 inches (152mm) with wall thickness’ of up to .154 inches (3.9mm).  Larger diameters and wall thickness’ can be accommodated with open style weld heads.

Polyethylene Welding
Polyethylene Welding is used within the Construction industry in the Gas and Water fields as well as other areas such as Electric and Waste Treatment industries.

Polyethylene Welding is used within the Construction industry in the Gas and Water fields as well as other areas such as Electric and Waste Treatment industries. It is becoming more popular within the trade as it is very cost effective way of welding. Like all welding, it requires training certification and experience. At NWI we have years of experience within this field to provide the training and certification you require.

It is becoming more popular within the trade as it is very cost effective way of welding. Like all welding, it requires training certification and experience. At NWI we have years of experience within this field to provide the training and certification you require.

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