Welding
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ASME Terms and Welding Positions
ASME Terms and Welding Positions
Designation Description
OFW Oxyfuel Gas Welding
SMAW Shielded Metal Arc Welding (MMA)
SAW Submerged Arc Welding
GMAW Gas Metal Arc Welding (MIG/MAG)
FCAW Flux Cored Wire
GTAW Gas Tungsten Arc Welding (TIG)
PAW Plasma Arc Welding
Note
Straight polarity = Electrode -ve
Reverse polarity = Electrode +ve
ASME P Numbers
BaseMetal Welding
Steel and steel alloys P‐No. 1 through P‐No. 15F
Aluminum and aluminum‐base alloys P‐No. 21 through P‐No. 26
Copper and copper base alloys P‐No. 31 through P‐No. 35
Nickel and nickel base alloys P‐No. 41 through P‐No. 49
Titanium and titanium‐ base alloys P‐No. 51 through P‐No. 53
Zirconium and zirconium‐base alloys P‐No. 61 and P‐No. 62
ASME F Numbers
F Number General Description
1 Heavy rutile coated iron powder electrodes :- A5.1
2 Most Rutile consumables such as :- A5.1
3 Cellulosic electrodes such as :- A5.1
4 Basic coated electrodes such as : A5.1
5 High alloy austenitic stainless steel and duplex :- A5.4
6 Any steel solid or cored wire (with flux or metal)
2X Aluminium and its alloys
3X Copper and its alloys
4X Nickel alloys
5X Titanium
6X Zirconium
7X Hard Facing Overlay
Note:- X represents any number 0 to 9
ASME A Numbers
A1 Plain unalloyed carbon manganese steels.
A2 to A4 Low alloy steels containing Moly and Chrome Moly
A8 Austenitic stainless steels
ASME Welding Positions
Welding Positions For Groove welds
Welding Position Test Position
Flat 1G
Horizontal 2G
Vertical Upwards Progression 3G
Vertical Downwards Progression 3G
Overhead 4G
Pipe Fixed Horizontal 5G
Pipe Fixed @ 45 degrees Upwards 6G
Pipe Fixed @ 45 degrees Downwards 6G
Welding Positions For Fillet welds
Welding Position Test Position ISO and EN
Flat (Weld flat joint at 45 degrees) 1F
Horizontal 2F
Horizontal Rotated 2FR
Vertical Upwards Progression 3F
Vertical Downwards Progression 3F
Overhead 4F
Pipe Fixed Horizontal 5F
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