Q:-Lineup clamps shall be used for butt welds in accordance with the procedure specification. When it is permissible to remove the lineup clamp before the root bead is completed:
1. The completed part of the bead shall be in approximately equal segments spaced approximately equally around the circumference of the joint.
2. The completed part of the bead shall be removed and rewelded after removing the clamp.
3. The completed part of the bead shall be peened before removing the clamp.
4. The completed part of the bead shall be at least 4 inches long for all pipe sizes
5. None of the Above
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