The International Institute of Welding (IIW) is an international organization that focuses on the promotion and advancement of welding and allied joining technologies. It was founded in 1948 and is headquartered in Paris, France. The IIW brings together experts, researchers, and industry professionals from around the world to collaborate on the development of welding standards, guidelines, and best practices.

One of the key roles of the IIW is to develop and maintain international standards for welding processes, materials, and qualifications. These standards help ensure that welding work is performed safely, efficiently, and to a high quality standard.

Additionally, the IIW provides training and certification programs for welding professionals, conducts research to advance welding technologies, and facilitates knowledge exchange and collaboration among its members.

Overall, the IIW plays a crucial role in advancing the field of welding and ensuring that welding practices meet the highest standards of quality and safety internationally.