ISO 6947 pdf download

ISO 6947 pdf download Welding and allied processes — Welding positions
1 Scope
This International Standard defines welding positions for testing and production, for butt and fillet welds, in all product forms.
Annex A gives examples of the limits of the slope of a weld axis and the rotation of the weld face about the weld axis for welding positions in production welds.
Annex B provides a comparison of International, European and US designations.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
welding position
position of a weld in space, which is defined relative to the slope of the axis and rotation of the face of the weld relative to the horizontal plane
2.2
main welding position
welding position, designated PA, PB, PC, PD, PE, PF or PG
NOTE For PA, PB, PC, PD and PE, see Figure 1.
2.3
slope
S
angle of the axis of the weld relative to the main welding position
2.4
rotation
R
angle of the face of the weld relative to the main welding position
2.5
inclined angle
L
angle of the axis of the pipe
3 Welding positions
3.1 Main welding positions
The main welding positions are illustrated in Figure 1 with examples of their application for butt and fillet welds in Figure 2.
3.2 Welding positions for production
Main welding positions can be used in other standards, e.g. ISO 9606 [1] , ISO 15614 [2] , to define the orientation of welds in production welding after qualifying in one of the main welding positions PA, PB, H-L045, etc. Slope and rotation ranges for welding positions in production are given in Table 1 for butt welds and in Table 2 for fillet welds (see also examples in Annex A).
NOTE For asymmetric tolerances, plus means revolving the weld surface towards the main welding position PA and minus towards the main welding position PE.
3.3 Welding positions for testing Welding positions used during welding of a test piece shall not exceed ±5° in slope and ±10° in rotation from the main welding position.
4 Designation Main welding positions shall be designated by the appropriate symbol in accordance with Figures 1 and 2 (see Example 1).
The symbol for the main welding position may be supplemented by the values for slope and rotation, given in three digits (see Example 2). For circumferential welds in pipes with inclined axes, the indication of slope and rotation shall be simplified in accordance with Figures 1 and 2 (see Examples 3 and 4).