Bead Sizing
The following table outlines the normal bead height and width when welding with the UF2000/1
equipment. Depending on site conditions, the measurements may vary slightly. This table is based
on PVDF and shall not be applicable for other materials.
UF2000/1 Bead Heights
Pipe Diameter
Pressure
Rating
Height
Width
mm inches
mm
inches
½” (20mm)
230 psi
.6-1.4
.023-.055
2.1-3.6
.082-.180
¾” (25mm)
230 psi
.7-1.55
.027-.061
2.6-4.0
.102-.158
1” (32mm)
230 psi
.9-1.60
.035-.068
2.7-5.0
.106-.196
1-1/4” (50mm)
230 psi
1.2-1.9 .047-.075 2.9-5.0 .114-.196
1-1/2” (50mm)
230 psi
1.2-2.2 .047-.087 3.0-5.1 .118-.201
2” (63mm)
230 psi
1.2-2.3
.047-.091
3.0-5.45
.118-.215
Bead Formation
The following describes typical bead formation when utilizing the UF2000/1 and UF2000/2
equipment. The information is standard to PVDF and Halar only. When welding with PolyPro, the
uniformity is the same for pipe as it is for pipe to fitting.
Pipe to Pipe
Very uniform and equal on both sides.
Pipe to Fitting
Uniform, but the fitting bead is normally slightly
larger.
Fitting to Fitting
Very uniform, but larger in general, compared to
pipe to pipe.
Top versus Bottom
Due to the natural effects of gravity, the bead
externally will appear smaller on top and larger
on the bottom. Internally
,
the bead will appear
straighter on top and flatter on bottom.
UF2000/2
Due to the heat from the heating element, an air
flow is always present during fusion. The air
flow will not affect the joint, but there will be
waves on the bead exterior in the three points of
the clamp openings.
-In thicker wall pipe fittings (230 psi) the waves
are more pronounced.
-90’s should be turned to the side rather than
facing up. This will prevent a “chimney” like
wind flow that would create a cold weld.
Asahi/America, Inc.
UF 2000/1
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