Fumes are very harmful based on their particle size. Various chemical analysis techniques are presented and their applicability to airborne particles is described. The size of fume particles will affect the deposition region in lungs. Temperature, air velocity and relative humidity are the factors that affect the size fume particles as well as the motion of the fumes particle in air. Aim: This study was conducted in order to measure the environmental parameters, to evaluate the physical properties and to determine the transport of welding fumes in air. Method: This research was used several equipments to measure the factors of the source emission. The particle morphology and shape of fume particles were capture and analysed using FESEM (Field Emission Scanning Electron Microscope) . Then the transportation of fumes particles, were calculated based on their Reynolds Number, settling velocity, mechanical velocity and stopping distance. Result: The shape of the fumes particle is spherical and then it was form chain like agglomerate structure. The diameter of the particle was found to be in nano-particles. The aerodynamic diameter value was calculated and also found the deposition region might be in the deep region of the lung (alveoli). The data of the source emission was used to solve the equations of the particle transportation. The temperature, relative humidity and air velocity was compared with Industrial Code of Practise on Indoor Air Quality which pulished by Department of Occupational Safety and Health (2010). The Reynolds number proved that the particles  moved in a laminar flow. The velocity was believed affected by the size of the particle. The smaller the fumes particle would be decreased the velocity as well as easier the movement of fume particle and the stopping distance will be nearest.