The iron and steel industry is a basis for the development of a number of industries in the global economy: the defence industry, transportation and heavy engineering, energy and construction (including aeronautical and shipping construction). Moreover, the iron and steel industry is closely related to the chemical industry and light industry. It shows that the iron and steel industry has the potential to contribute to the competitiveness of national producers and to the growth of the national economy.

Production of iron and steel mainly involved with high temperature cooling fluid, water and steam also in some processes the raw material must be burned at very elevated temperatures and this generates huge amount of hot air and dust. All these hot fluid air and dust are transferred between the processes by pipelines and ducts.

Ayvaz produces circular & rectangular shaped thick wall duct expansion joints (Lens) for the hot air ducts as well as specially designed stainless steel expansion joints for the pipelines of Iron & Steel industry. All welding operations and welding control methods are to be followed carefully and to be monitored by quality control plans.