Pipe vs Tubing
What is Pipe used for?
Transporting fluids under low pressure
What does the weld type with the letter "F" and the letter "R" mean? EX: 1FR
F-Fillet
R-Rotated
What does the weld process influence?
Joint design
What is degree of the bevel for pipe or open root?
30-37.5
Tungsten Inert Gas
What is Tubing used for?
Structural Applications
What does the letter "G" mean? EX: 1G
Groove weld
Which 2 weld processes require larger groove angles so the arc can reach the root?
SMAW and GTAW
What type of material requires a V-groove with a landing?
Carbon Steel
100% Argon
What is the Nominal dimension for Pipe?
ID-Inside diameter
What does Roll welding mean?
The pipe can be rotated while welding.
Which 2 weld processes require smaller groove angles?
GMAW and FCAW
What type of material requires a knife edge with no landing?
What TIG torch part conducts the current to the tungsten and holds it in place?
Collet
What is the nominal dimension for Tubing?
OD- Outside diameter
List the groove weld positions.
1GR, 2G, 5G, 6G
Pipe up to what size can be welded without any joint preparation?
3/16 inch
What type of material requires a U-groove with a landing?
Aluminum
What does GTAW stand for?
Gas Tungsten Arc welding
What do both Pipe and Tubing calculate?
Pipe- calculates capacity of fluid
Tubing- Calculates Tolerances
List the positions for pipe fillet welds.
1FR, 2F, 2FR, 4F, 5F
What 4 factors are involved in Joint preparation?
Pipe diameter, wall-thickness, type of pipe used, and weld process.
Why are narrower groove angles encouraged?
Requires less passes to fill the groove, resulting in less heat build-up which can cause distortion.
What are the two types of TIG Torch leads?
Water cooled and air cooled