Q1: How to weld AA6061 pipes without hot cracking?
A1: Use ER4043 or ER5356 filler, proper cleaning, and post-weld aging to recover strength.
Copper-Nickel Pipes (C70600)
Q2: What shielding gas is optimal for Cu-Ni 90/10 welding?
A2: Argon or Ar-He mix; use ERCuNi filler and ensure thorough de-oxidation.
Nickel Alloy Pipes (UNS N06625)
Q3: What is the heat input limit for welding Inconel 625 pipes?
A3: Keep below 50 kJ/inch to avoid segregation and maintain pitting resistance.
Titanium Pipes (Gr.2)
Q4: How to protect titanium welds from contamination?
A4: Use argon trailing shield, high purity backup gas, and clean surfaces meticulously.
Polyethylene (PE) Pipes
Q5: What is the electrofusion procedure for PE100 pipes?
A5: Follow ISO 21307: use compatible fittings, clean surfaces, and maintain fusion time/pressure.
