DIN 8552-3:2006-01

The dimensions and ranges of dimension given in this standard are based on practical experience. It covers dimensions for joint preparation which generally accord with the most favourable welding conditions. The indicated ranges of dimension set limits to design and do not represent tolerances for manufacture. Due to the wide range of application, the numerical values for the included angle, the root gap and the depth of root face are specified within broad limits. The choice of the joint preparation depends mainly on the material, the welding position and the welding process under the precondition that full penetration welds will be produced. This requires appropriate welding parameter selection as well as root preparation, where applicable, in case of both-side welding.