It is a machıne which can weld small diameter of sleeves on square or elipse shaped work pieces or  convex covers with some materials such as boiler, air bottle, lpg tank, compressor tank & expansion tank etc..These processes are performed in our machines into two different ways.One is the system where torch mechanism rotates around its own axis by 0-360 degree, but work piece standy constant and others are the systems where work piece is compressed, and this system may rotate by 0-360 degree, but torch mechanism stands constant.The part where the torch mechanism is connected in our machine is capable to move downwards and upwards.In both systems, welding speed can be adjusted by speed controller.Approaching and compression systems are pneumatic.