RCRAMER.COMASME Definitions, Consumables, Welding Positions
ASME has adopted their own designation for welding processes, which are very different from the ISO definitions adopted by EN24063.
| 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 |
Straight polarity = Electrode -ve
Reverse polarity = Electrode +ve
ASME F Numbers
| F Number | General Description |
| 1 | Heavy rutile coated iron powder electrodes : A5.1 : E7024 |
| 2 | Most Rutile consumables such as : A5.1 : E6013 |
| 3 | Cellulosic electrodes such as : A5.1 : E6011 |
| 4 | Basic coated electrodes such as : A5.1 : E7016 and E7018 |
| 5 | High alloy austenitic stainless steel and duplex : A5.4 : E316L-16 |
| 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 |
ASME A Numbers
These refer to the chemical analysis of the
deposited weld and not the parent material. They only apply
to welding procedures in steel materials.
| A1 | Plain unalloyed carbon manganese steels. |
| A2 to A4 | Low alloy steels containing Moly and Chrome Moly |
| A8 | Austenitic stainless steels such as type 316. |
ASME Welding Positions Graphic Representation
Note the welding progression, (vertically upwards or downwards), must always be stated and it is an essential variable for both procedures and performance qualifications.
Welding Positions For Groove welds:
| Welding Position | Test Position | ISO and EN |
| Flat | 1G | PA |
| Horizontal | 2G | PC |
| Vertical Upwards Progression | 3G | PF |
| Vertical Downwards Progression | 3G | PG |
| Overhead | 4G | PE |
| Pipe Fixed Horizontal | 5G | PF |
| Pipe Fixed @ 45 degrees Upwards | 6G | HL045 |
| Pipe Fixed @ 45 degrees Downwards | 6G | JL045 |
Welding Positions For Fillet welds:
| Welding Position | Test Position | ISO and EN |
| Flat (Weld flat joint at 45 degrees) | 1F | PA |
| Horizontal | 2F | PB |
| Horizontal Rotated | 2FR | PB |
| Vertical Upwards Progression | 3F | PF |
| Vertical Downwards Progression | 3F | PG |
| Overhead | 4F | PD |
| Pipe Fixed Horizontal | 5F | PF |
Welding Positions QW431.1 and
QW461.2
Basically there are three inclinations
involved.
- Flat, which includes from 0 to 15 degrees inclination
- 15 - 80 degrees inclination
- Vertical, 80 - 90 degrees
- ASME 9 Introduction
- Procedure Qualification Record (PQR)
- Welding Performance Qualification (WPQ)
- ASME definitions for welding processes, consumables and welding positions
* Article originally from here. and dated 19 March 2001
