Harvesting an abundance of oil and natural gas resources, the Middle East supplies nearly half of all exports to the global oil market. Middle Eastern countries Iran, Iraq, Kuwait, Qatar, Saudi Arabia and the United Arab Emirates are all members of the Organization of the Petroleum Exporting Countries (OPEC), which pumps roughly 40% of the world's oil, with Saudi Arabia leading the pack for the greatest amount of output. OPEC's crude oil production was 28.7 million barrels per day in the first half of 2009.
Welding is a type of fabrication that is used to join metals or thermoplastics together by fusion. This is done by heating and melting part of the material and often adding a filler material which when cooled will form a strong bond. Pressure may also be used to weld, with or without the application of heat.<br/>There are different methods of welding used depending on the type of materials and desired end result, and Welders must be properly qualified for the type of welding work carried out.