Crane construction covers a wide range of machinery for load lifting, ranging from small truck-mounted cranes with hook loads of 1 t with tubes used for the crane column and hydraulic cylinders, and super tower cranes with hook heights of over 200 m / 650 ft. and jib lengths of more than 100 m / 330 ft., to heavy-duty crawler cranes with lattice booms and jibs made of high-strength steel.
Designs in crane construction are optimized with tubes and structural hollow sections with different diameters, wall thicknesses and grades to suit the specific load. The objective is to achieve slim yet durable high-strength designs for loads involving cyclic vibratory stresses.
Hot-finished mechanical tubes and structural hollow sections are ideal for demanding applications, e.g. in super-heavy crawler cranes where welds are undesirable due to their strength-reducing effect. Hot-finished tubes from Vallourec also feature high buckling resistance under tensile and compressive loads as well as homogeneous material properties with a uniform microstructure through the cross section (see also Product Advantages). Their overall material properties make seamless hot-finished sections far superior to welded and cold-formed sections when it comes to typical crane requirements such as top performance under dynamic cyclic stresses.
Vallourec mechanical and structural tubes are specified by the world's leading crane and crane component manufacturers for all crane types, including the following: