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Welding inspector is a technical field that is followed by many people after their high school diploma.  Many students who want to join this field would need to have proper recognized study of welding.  You can start off early with your wielding inspector career, but it is most common to begin right after you finish high school education.

In order to become a welding inspector, you need to find schools or institutes where they are teaching wielding inspector courses. The first place to look for is online, as most of the welding inspector courses now are offered online. At the beginning, you can take some demo classes to start off; after they are finished you must choose a module of study that suits you most.

Many online schools and colleges offer flexible study timings designed for a working student. As a welding inspector job is more of practical hands on job, it requires more practical study than theoretical. The online study must complement some practical work that can be performed under a welding specialist’s guidance.

On the internet, you can find various welding inspector courses. Some are degrees that last over three to four years, while others are short term courses that you can do over a small period of time. It totally depends upon the student, how quickly the student grasps the information. Internet is a big world and you can certainly find many other welding inspector courses and its students, with whom you can collaborate and discuss.

Other than online, there is the traditional way of studying welding inspector courses, which is getting enrolled in a school or college that teaches these courses. This is a much better and easier method of getting a welding inspector certification that you must get before doing any commercial work.

Finding a good and affordable school can be a touch difficult. You can ask around and take some classes to determine whether the school is good for you or not. Your local school should be your first priority, as you would have the local experience and you will enjoy your study there more. Many of the welding inspector courses that you take here will have impact on your future job or line of work, so it is extremely important that you study well. Try to take good grades as this can affect your job in the future.

By taking a certification and studying this fully, you will not only understand the subject but will also get insight into the industry norms and how the industry works. Welding work is all about working with the industry and you must have sufficient knowledge about the industry before you actually become a part of it.

A welding certification would certainly help you become better in what you are. It would give you the recognition that is needed after undergoing rigorous welding training and exercises. Your certification would help you in getting a job and would put you above other non-certified people. Your future will be certainly boosted as you would be a certified welding inspector.

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If you are looking for jobs then you must be ready to face the tough competition that is present in the job market these days. Lots of people are interested in the construction jobs these days. Construction work is quite interesting and it is one of the most popular career fields chosen these days.

There is a lot of demand for the construction workers. Construction jobs wanted are usually available on the internet. There are various websites which offer the kind of construction jobs needed by people. You can find the best job opportunities on the construction job websites.

You will find a list of jobs on these websites. It is also very important to choose the best website so that you can check out the jobs offered by the best construction companies of the world. Sometimes you might find the construction jobs help wanted by lots of people who are interested in these jobs.

There are certain things that you need to consider while looking for the construction jobs. First of all if construction jobs wanted is the case then always try to get proper training in construction.

There are various places which can offer you good training. Unless you learn the job well you would not be able to give the best performance. If you know your job then you will get interview calls from the best construction companies. There are certain advantages of entering into this profession.

If you want you can shift your base to some other countries. Overseas construction jobs have become quite popular these days. You can perform a research regarding the overseas jobs and check out the number of opportunities available.

While applying for the jobs you can select the location and provide the location preference as one of your criteria. Construction jobs wanted employment is widely available in the United States as well as in the United nations.

Before you choose the country for the job it is important for you to make sure that the country has to offer you better opportunities. There are certain pros and cons of being an international construction jobs wanted worker. Some of the workers find it quite difficult to cope up with the situations abroad.

Some people fail to adapt with the situation present in these countries. Overseas job opportunities can help you earn a lot of money. The salary offered by these overseas companies are usually more than what you get from the local companies.

There are certain foreign job forums which can also offer some help. If you participate in these forums you will have a great knowledge about these jobs and the kind of jobs the overseas companies offer. Construction jobs can be of different types.

You can either find carpenter jobs, electrical jobs, house construction or even other essential constructions. You can look for the construction jobs wanted contractor work in your country as well as overseas. It is very important to perform proper research before taking up any kind of job.

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More Welders Resort to Induction Heating For Preheating, Stress-Relieving

Traditional Induction Heating Applications

- Soldering                                                          

- Brazing

- Surface hardening

- Tempering
- Bonding

- Curing                                                        
- Encapsulating
- Melting
- Forging
- Super heating
- Crystal growing

Although many industries have used induction heating for decades, it’s a newcomer to industrial and construction applications involving welding. Pre-heating before welding and stress-relieving (i.e. postheating) after welding are the new uses for induction heating, and companies with weldiang-intensive operations have significantly increased efficiency as a result.

Induction heating: how it works

Induction heating systems employ non-contact heating. They induce heat electromagnetically rather than using a heating element in contact with a part to conduct heat, as does resistance heating. Induction heating acts more like a microwave oven; the appliance remains cool while the food cooks from within.

In an industrial example of induction heating, heat is induced in the part by placing it in a high-frequency magnetic field. The magnetic field creates eddy currents inside the part, exciting the part’s molecules and generating heat. Because heating occurs slightly below the metal surface, no heat is wasted.

Induction heating’s similarity to resistance heating is that conduction is required to heat through the section or part. The only difference is the source of heat and the temperatures of the tool. The induction process heats within the part and the resistance process heats on the surface of the part. Depth of heating depends on the frequency. High frequency (e.g., 50 khz), heats close to the surface, while low frequency (e.g., 60 Hz) penetrates deeper into the part, placing the heating source up to 3 mm deep, allowing heating of thicker parts. The induction coil does not heat-up because the conductor is large for the current being carried. In other words, the coil does not need to heat-up to heat the workpiece.

Induction heating system components

Induction heating systems can be air- or liquid-cooled depending on application requirements. A key component common to both systems is the induction coil used to generate heat within the part.

Air-cooled system

A typical air-cooled system consists of a power source (5kW or 25kW), induction blanket, and associated cables. The induction blanket consists of an induction coil surrounded by insulation and sewn into a high temperature, replaceable Kevlar sleeve. This type of induction system can include a controller to monitor and automatically control temperature. A system not equipped with a controller requires the use of a temperature indicator. The system could also include a remote on-off switch. Air-cooled systems can be used for applications up to 400 degrees F, designating it as a pre-heat only system.

Liquid-cooled system

Because liquid cools more efficiently than air, this type of induction heating system can be used for applications requiring higher temperatures, such as high-temperature preheating and stress relieving. The principle differences are the addition of a water cooler and the use of a flexible liquid-cooled hose that houses the induction coil. Liquid-cooled systems also generally use a temperature controller and built-in temperature recorder, particularly important components in stress relieving applications. The typical stress relieving procedure requires a step to 600-800 degrees F, followed by a ramp or controlled temperature rise to a soak temperature of approximately 1250 degrees F. After a hold time, the part is control-cooled to between 600-800 degrees F. The temperature recorder collects data on the part’s actual temperature profile based on a thermocouple input, a QA requirement for stress relieving applications. The actual procedure will be determined by the type of work and the applicable code.

Induction heating benefits

Compared to conventional preheating and stress relieving methods, induction heating offers numerous advantages, including improved heat uniformity and quality, reduced cycle time, and lower consumables costs. Induction heating is also safe, reliable and easy to use, and scores higher than alternative technologies in power efficiency and versatility.

Uniformity and quality

Induction heating is not particularly sensitive to coil placement or spacing. Generally, the coils should be evenly spaced and centered on the weld joint. On systems so-equipped, a temperature controller can establish the power requirement in an analog fashion, providing just enough power to maintain the temperature profile. The power source provides power during the entire process.

Reduced cycle time

The induction method of preheating and stress relieving provides significantly quicker time-to-temperature. On thicker applications, such as high pressure steam lines, induction heating can slash two hours from cycle time. It is conceivable to reduce cycle time from the control temperature to soak temperature. When combined with other usability factors, it is not uncommon to expect a 50 percent total cycle time reduction.

Reduced consumables costs

The insulation used in induction heating is easy to attach to work pieces and can be reused many times. Conversely, ceramic fiber insulation used in resistance heating can be used only once or twice before it has to be discarded, requiring a large inventory of insulation and incurring significant costs for disposal of potentially hazardous material. In addition, in comparison to resistance system components, induction coils are robust and don’t require fragile wire or ceramic materials. Also, because the induction coils and connectors don’t operate at high temperatures, they are not subject to degradation, as are ceramic heating pads.

Ease-of-use

A major benefit of induction preheating and stress relieving is its simplicity, which contributes to easy use. Insulation and cables are simple to install, usually taking less than 15 minutes. http://inductionheater.net  has shown boilermakers and pipefitters how to use the induction equipment with just one day of training.

Power efficiency

The inverter power source is 92 percent efficient, a critical advantage in an era of skyrocketing energy costs. Additionally, the induction heating process is more than 80 percent efficient. Regarding power input, the induction process only requires a 40 amp line for 25kW of power.

Safety

Preheating and stress relieving through the induction method is extremely worker-friendly. Induction heating does not require hot heating elements and connectors. Very little airborne particulate is associated with the insulation blankets, and the insulation itself is not exposed to temperatures over 1800 degrees F, which can cause insulation to break down into dust and then breathed by workers .

Reliability

One of the most important factors impacting productivity in stress relieving is not interrupting the cycle. In most instances, cycle interruption means the heat treat will need to be re-run, which is significant when a thermal cycle can take a day to complete. The induction heating system components make cycle interruptions unlikely. The cabling for induction is simple, making it less likely to fail. Also, no contactors are used to control the heat input to the part.

Versatility

The Duolin Induction Heat Treatment System was originally designed for preheating and stress relieving of pipe. Now, users of induction heating systems have adapted the process for weldolets, elbows, valves, and other parts. One of the aspects of induction heating that makes it attractive for complex shapes is the ability to adjust the coils during the heating process to accommodate unique parts and heat sinks. The operator can start the process, determine the affects of the heating process in real-time and modify the coil position to change the result. Lastly, the induction cables can be moved without waiting for air cooling at the end of the cycle.

Induction heating in welding applications

DUO LIN Induction Heating Systems, Co, Ltd., the manufacturer of induction heating systems for welding applications, has proven its technology on a number of projects, including oil and gas pipelines, heavy equipment construction and maintenance and repair of mining equipment. Summaries of various projects are presented below.

Oil pipeline

A North American oil pipeline maintenance operation had used a combination of propane torches and electrical resistance to heat pipe before welding encirclement repair sleeves or STOPPLE fittings to the pipeline’s 48-inch girth. While many repairs could be made without having to stop oil flow or drain it from the pipe, the presence of the crude itself hampered welding efficiency due to the heat sink effect of the flowing oil. Propane torches required constant interruption of welding to maintain heat, and resistance heating – while providing continuous heat – often couldn’t meet required weld temperatures.

The maintenance company turned to induction heating as a solution. On encirclement sleeve repairs, two 25kW systems were employed with parallel blankets to obtain a preheat temperature of 125 degrees F. As a result, cycle time was reduced from 8-12 hours to 4 hours per girth weld. Preheating for a STOPPLE fitting (a “T” junction with valve) repair had been even more challenging due to the fitting’s greater wall thickness. With induction heating however, the company used four 25kW systems with a paralleled blanket set-up. Two systems were used on each side of the “T”. One system was used on the mainline to preheat the oil and the second was used to preheat the “T” at the circumferential weld joint. The preheat temperature was 125 degrees F. The weld time was reduced from 12-18 hours to seven hours per girth weld.

Natural gas pipeline

A natural gas pipeline construction project entailed building a 36 in. diameter, .633 in. pipeline from Alberta, Canada to Chicago. On one spread of this pipeline, the welding contractor used two 25kW power sources mounted on a tractor with the induction blankets attached to booms for speed and convenience. The power sources were used to preheat both sides of the pipe joint. Critical to this process was speed and reliable temperature control. As alloy content increases in materials to reduce weight and weld time, and to increase part life, controlling preheat temperatures becomes more critical. In this induction heating application, it required less than three minutes to obtain the 250 degrees F preheat temperature, versus approximately five minutes using traditional preheating methods. In addition, temperature uniformity and operator safety were improved.

Heavy Equipment

A heavy equipment manufacturer often welds adapter teeth onto its loader bucket edges. Previously, the tack welded assembly was moved back and forth to a large furnace, requiring the welding operator to wait while the part was reheated repeatedly. The manufacturer opted to try induction heating to preheat the assembly to prevent movement of the product. The material is 4 in. thick with a high required preheat temperature due to alloy content. Duolin Electric worked with the customer to develop customized induction blankets to meet the application requirements. The insulation and coil design provided the added benefit of shielding the operator from the part’s radiant heat. Overall, operations were considerably more efficient, reducing welding time and maintaining temperature throughout the welding process.

Mining equipment

A mine had been experiencing cold cracking problems and preheating inefficiency using propane heaters in its repair operations of mining equipment. Welding operators had to remove a conventional insulating blanket from the thick part frequently to apply heat and keep the part at the correct temperature. The mine opted to try induction heating using flat, air-cooled blankets to preheat the parts before welding. The induction process applied heat to the part quickly. It also could be used continuously during the welding process. Weld repair time was reduced by 50 percent. In addition, the power source was equipped with a temperature controller to keep the part at the target temperature. This virtually eliminated rework due to cold cracking. The customer reported an annual savings of ,000.

Power plant

A power plant builder was constructing a natural gas power facility in California. Boilermakers and pipefitters had been experiencing construction delays due to the preheating and stress relieving methods they were employing on the plant’s steam lines. One of the biggest problems on this job was reliability of the electrical resistance equipment, which suffered from contactor and connector failures and broken wires on the heating pads during stress relieving. Extensive rework as a result, combined with long heating cycles, was delaying construction significantly. The company brought in induction heating technology in an attempt to increase efficiency, particularly for work on medium to large steam lines, as these pieces take the most heat treating time required on a job site.

On a typical 16 in. weldolet with a 2 in. wall thickness, resistance preheating and stress relieving used to take five-and-a-half hours to complete. Induction heating was able to shave two hours off the time-to-temperature (600 degrees F) and another hour to reach soak temperature (600 degrees F to 1350 degrees F) for stress relieving. The simplicity of wrapping the induction blankets around complex shapes further reduced the time to perform the heat treat. It took the fitters 15 minutes to wrap a joint that would have required two workers two hours to prepare using a resistance set-up.

www.JoshGuide.com How to Work on an Offshore Oil Rig Offshore oil rigs are huge platforms equipped with well-drilling equipment to produce oil from beneath the ocean. Companies need workers to operate and maintain this equipment. If working out at sea for weeks at a time in all types of weather is for you, consider working on an offshore oil rig. 1. Pass a physical examination and a drug screen test. Working on an offshore oil rig is physically demanding. Be in excellent physical condition if you wish to work on an offshore oil rig. 2. Get experience with land-based oil rigs. This helps you develop the skills to work the machinery without being in a more demanding environment like an offshore rig. 3. Meet the age requirement. You must be at least 18 years old to work on an offshore oil rig. No formal education is necessary. You simply must have some experience in the oil industry and be hard-working and ambitious. 4. Adapt to working a rotating shift. Most oil rigs work on a 14/21-rotating shift, meaning you work for 14 days and then have 21 days off. The 14 working days require long hours and tough work, but you can then have the equivalent of 60 percent of the year off. 5. Prepare yourself to work in all kinds of conditions and face possible dangerous situations. For instance, the oil rig you are working on may face a hurricane. Know all the possible dangers about working on an oil rig before deciding if this career is for you. Tips & Warnings Search for other …

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I’m majoring in Welding Engineer at The Ohio State University, I’ve heard that i can easily find a job in the US, but I’m not planning to live in the US. I’m asking about places like Europe, Middle East, South America, or am I gonna be stuck in the US?