Datum: 2014-03-31
221RLI002534EN_2.doc
Manufacturer’s Welding Instructions ( WPS ) for
Housing Connection U
Location: Büchen
Preparation method: mechanical
Manufacturer’s welding method: 141 ( WIG )
Cleaning method: brushing or pickling, degreasing
Welders: qualified welder acc. to DIN EN 287-1
AD-2000 Merkblatt HP3
Specification of the parent metal: 1.4404, 1.4435
Welding procedure: 141 DIN EN ISO 4063
Workpiece thickness [mm]: t = 2; 2,5; 3; 4
Weld type: I – weld, fillet weld
Outside diameter [mm]: 70, 85, 114, 154, 184, 212
Preparation of the joint: gap < 0,2 (mm)
Welding position: PA (horizontal); PD (overhead)
Structure of the joint
Welding procedure
Produce I-weld and fillet weld
1.
Insert locking into housing connection U and fix with clamps,
according 221MBL001334G
2. Tack housing connection U with 4 tack-weld spots at welding neck
3. Produce fillet weld using backing gas
4. If necessary, produce I - weld (for tightness only) using
1mm
1.4430 filler rod.
5. After cooling down, remove blind cover
6.
Visual inspection of I – weld
7.
Check fillet weld with A–tolerance gauge
Workpiece
thickness t
[mm]
Weld bead
Procedure
Filler metal
[mm]
Current
strength
I [A]
Voltage
U [V]
Kind of
current /
polarity of the
electrode
Welding
speed
[cm/min]
Heat
Application
[kJ/cm)
2; 2,5
Fillet weld
141
1,6
80 - 100
10 - 15
=/-
3 -7
5 - 7
3
Fillet weld
141
1,6
90 - 110
10 - 15
=/-
3 -7
6 - 8
4
Fillet weld
141
1,6
120 - 140
10 - 15
=/-
3 -7
7 - 10
2; 2,5; 3; 4
I-Weld
141
1
50 - 60
10 - 15
=/-
3 -7
5 - 7
Filler material: in consultation with the technical expert
(third party)
Inert gas: DIN EN ISO 14175 - I1
Flow rates in l/min: 13 - 15
Backing gas: DIN EN ISO 14175 - I1
Flow rates in l/min: 10 - 20
Manufacturer:
Merhof, 2014-03-31
Confirmation of the correct work by the processor:
………………………………………………………………
Name, Date and Signature (Welder)
Name, Date and Signature (Welding Supervision)
a1,2
t