Offering increased performance at reduced weight and cost, high-strength steels are growing in popularity. These performance gains are particularly advantageous in harsh environments such as offshore wind farms.
Preheating makes your material a hard nut to crack
However, the trend for high-strength materials is also driving the demand for preheating prior to welding. This heat treatment step reverses any hydrogen embrittlement effects that can lead to cracking, maintaining the tensile strength and integrity of the steel. The use of LINDOFLAMM® acetylene / compressed air burners allows the material to be pre-heated either mechanized or manually. The additional heat facilitates metal cutting and welding. Even thicker sections can be cut and welded with better quality.
Parameters for successful preheating
Preheating is recommended and mandated by many standards and codes of practice. Yet it can be an extremely complex step where the optimum parameters vary from one application to another. Among the critical factors for successful preheating are precise temperature control and uniform heat distribution throughout the thickness of the material. The preheating temperature depends on the type and thickness of the material, and the subsequent welding process.
Optimising the preheating performance with acetylene as fuel gas
Whenever precise temperature control and uniform heat distribution is required, acetylene should be your fuel gas of choice. As a cutting or welding gas it reaches the cutting and welding temperature faster, burns hotter, can be applied more precisely, and will greatly enhance the overall productivity and efficiency of any preheating job.
The best setting for preheating: LINDOFLAMM® special burners
We understand that off-the-shelf solutions do not always fit individual needs and have therefore developed a range of specially designed burners and nozzles engineered for reliable acetylene flames and long-lasting use. We are proud to call the LINDOFLAMM® system and burners the best-in-class equipment, an achievement of in-depth engineering knowledge, research and practice that can be customised to maximise your thermal efficiency values.