Welding process (SAW)
Welding process (SAW)
(OP)
Dear Sirs,
I've performed a PQR with SAW process for butt weld joint of plate ASTM A 283 GrD thickness 25mm with root face 16mm with two single pass.
Electrode used: SFA 5.17 F7A6-EM12K Dia. 4mm
Results of tests OK
Is it conventionnal to use the above joint design (with 16mm root face) for carbon steel?
Regards
I've performed a PQR with SAW process for butt weld joint of plate ASTM A 283 GrD thickness 25mm with root face 16mm with two single pass.
Electrode used: SFA 5.17 F7A6-EM12K Dia. 4mm
Results of tests OK
Is it conventionnal to use the above joint design (with 16mm root face) for carbon steel?
Regards





RE: Welding process (SAW)
RE: Welding process (SAW)
RE: Welding process (SAW)
Do you mean that you beveled the plate each side approximately 4.5 mm, or 9mm from one side? Did you back gouge? What Code are you working to?
RE: Welding process (SAW)
Thus, for carbon steel 25mm (~1") in thickness, the root face dimension should be closer to 8mm (5/16") instead of 16mm (0.63").
I have seen a maximum 5/8" (16mm) root face dimension only used for a square groove weld with backing. However, this is the limit and on thicker material, bevels are required.
RE: Welding process (SAW)
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: Welding process (SAW)
The joint design is double V (X)
Applied Code is ASME VIII Div. 1
What is the problem if all the tests and exmination results (RT, UT, Tensile, Bend, Hardness, Impact) are satisfactory?
I've made a sample with square preparation 25mm thickness without any bevel with the same material and the test results are acceptable.
RE: Welding process (SAW)
RE: Welding process (SAW)
RE: Welding process (SAW)
RE: Welding process (SAW)
Values reached about 140J at 0°C
Regarding the position of the wire, the welding machine is equiped with an automatic regulation system. No possibility to go away from the joint centre. Adding to that wed increase voltage in order to have a large intersection at the weld toe.
RE: Welding process (SAW)
RE: Welding process (SAW)
No PWHT performed.
Regards