S9074-AQ-GIB-010/248 Rev 1
PIPE
D
T
C
B
A
T (MIN)
TEST
C D
A
B
TEST
A
B
C
D
T (MIN)
ϕ
5/16 max. 3/16 min (nom wall thickness) 3/8 min (nom wall thickness) 5/16 max.
0 to 1/16 0 to 1/16 0 to 1/16 0 to 1/16
5/16 max 5/16 max
75±5° 3
75 ± 5°
Note 7
Note 7
3
Note 7
Note 7
3/16 min. (nom. wall thickness) 3/8 min. (nom. wall thickness)
75 ± 5°
Note 7 Note 7 Note 7
75±5° 4
4
Note 7
NOTES: 1. In lieu of the joint design shown above, any applicable joint design from MIL-STD-22 or from an approved welding procedure may be employed. If this is done, the test shall still be recorded as test nos. 3 and 4. The welder shall be considered qualified to the extent specified for the standard test nos. 3 and 4 joint. 2. Space restrictions may be omitted when welders are to weld piping without space restrictions (see figure 7-21). This limitation shall be entered in the qualification records. 3. The weld should be made with the maximum size electrode or welding rod suitable for the position and thickness of the test assembly. 4. Mark pipe to ensure correct location of specimens or orientation for radiography. 5. If destructive testing is employed, after VT, weld face reinforcement may be removed and backing rings, when used, shall be removed prior to destructive testing per 5-4.2. Undercutting shall not be removed. Removal of root side reinforcement of one-sided welds with no backing is not permitted for root bends. When radiography is not employed for qualification evaluation, bend testing shall be conducted as follows: (a) Horizontal-fixed position pipe. (i) Face bend from the 45-degree and 225-degree positions (see figure 7-21). (ii) Root bends from the 135-degree and 315-degree positions (see figure 7-21). (b) Vertical-fixed position pipe. (i) Face bend from the 225-degree position (see figure 7-21). (ii) Root bend from the 135-degree position (see figure 7-21). 6. Minimum (nominal wall thickness) is used to indicate that the dimension is a minimum thickness based on the minimum pipe wall thickness allowed by the material specification. For example, 3/16 inch minimum (nominal wall thickness) would allow the use of any pipe wall considered 3/16 inch nominal even if the actual measured thickness was less than 0.187 inch, but in considering the 2T maximum of the qualified thickness range, the welder would be qualified to 3/8 inch nominal pipe wall. 7. Backing ring dimensions shall be in accordance with MIL-STD-22.
Figure 7-15. Performance Qualification Tests Nos. 3 and 4 for Arc Welding (Pipe)
Figure 15. Performance Qualification Test Nos. 3 and 4 for Arc Welding (Pipe).
7-90
Made with FlippingBook - Share PDF online