in a continuous weld length of 305 mm 12 inches or 1/6 the length
of the weld, whichever is smaller; and undercuts 0.40 mm 1/64 inch
or 6 percent of the wall thickness, whichever is smaller, are
acceptable regardless of length.]
**************************************************************************
NOTE: Include Tables I, II, or III below as
applicable to project.
**************************************************************************
c.
Weld reinforcement:
(1)
ASME B31.1, conform to Table I.
TABLE I
REINFORCEMENT OF GIRTH AND LONGITUDINAL BUTT WELDS
____________________________________________________________________________
Maximum Thickness of Reinforcement
for Design Temperature
_________________________________________
Greater than
Less Than
400oC
175oC-400oC
175oC
Thickness of Base Metal,
_________
_______________
________
millimeters (mm)
mm
mm
mm
____________________________________________________________________________
Up to 3.00, incl.
2.00
2.50
5.00
Over 3.00 to 5.00, incl.
2.00
3.00
5.00
Over 5.00 to 13.00, incl.
2.00
4.00
5.00
Over 13.00 to 25.00, incl.
2.50
5.00
5.00
Over 25.00 to 50.00, incl.
3.00
6.00
6.00
Over 50.00
4.00
The greater of 6 mm
or 1/8 times the
width of the weld in
mm.
NOTES:
1. For double welded butt joints, this limitation on reinforcement given
above shall apply separately to both inside and outside surfaces of the joint.
2. For single welded butt joints, the reinforcement limits given above
shall apply to the outside surface of the joint only.
3. The thickness of weld reinforcement shall be based on the thickness of
the thinner of the materials being joined.
4. The weld reinforcement thicknesses shall be determined from the higher
of the abutting surfaces involved.
5. Weld reinforcement may be removed if so desired.
__________________________________________________________________________
SECTION 15216N
Page 17
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