5. This has major effects on economics and distortion control etc
The root face, root gap and angle of bevel values, the choice of
single, or double sided preparations, are dictated only by the type
of welding process, the position and accessibility of the joint*
The basic rule is this:
The more you take out, then the more you must put back in*
Remember, the purposes of a weld preparation is to allow access
for the welding process, penetration and fusion through the area
of the joint and its faces*
19. Extremely poor toe blend, but excess weld metal is within limits*
It is also possible that the height of excess weld metal is within
the accepted limit of an applied standard, but the toe blend is
unacceptable, as shown below*
3 mm90°
20. Weld Sizing (Fillets): DTT. ATT. Excess weld metal. Leg length *
Weld Sizing (Butts): DTT. ATT. Excess weld metal.
Weldment Terms: Weld face & root. Fusion zone & boundary. HAZ.
Weld toes.Weld width
Preparation Terms: Bevel/included angle. Root face/gap. Land/Radius
Types of Preparation: Bevel’s. V’s. J’s. U’s. Single & Double Sided.
Types of Joint: Butt. T. Lap. Corner (Open & Closed)
Types of Weld: Butt. Fillet. Spot. Seam Plug. Slot. Edge.
Weld Preparation: Preparing a joint to allow access and fusion.
Joint: A Configuration of members
Weld: A Union of materials