torch-acetylene-202-62.html
CW Product Cat UK
63 / 140
63
flame
straightening
. during welding and cutting, stresses are caused in the material that can result in unwanted deformations. if these deformations are unacceptable, the part must be rectified. a suitable method is usually flame straightening, and in some cases it is also the only option for reducing the deformations to an acceptable level. flame straightening flame straightening takes place by means of rapid local heating, which entails a permanent local deformation of the material, through the pre- vention of thermal expansion. during cooling, the material then shrinks. steel must be heated to approx. 600 – 700°c, which causes the steel to change to a dark red colour. heat forming heating in order to bend bar profiles etc. generally entails the same demands for rapid, brief heating as for flame straightening. pre-heating (raised working temperature) pre-heating a welding object is dependent on the type of parent mate- rial, the thickness of the material and which welding process is to be used. if pre-heating is required, the flamtech torch
has suitable proper- ties for the task. flamtech torch torch systems. flame straightening and heating. consult your material supplier regarding suitable pre-heating temperature. in order to succeed with flame straightening, heating has to take place quickly. this means that acetylene (which has the highest effective heating value of all fuel gases) and an efficient torch have to be used. the flamtech torch satisfies these requirements. note! torch systems
cylinder-bar-acetylene-64.html
