Q: What is the purpose of "bead trimming" after welding?
A: To remove the internal and/or external weld reinforcement (bead) for smoother flow, easier coating, or to meet dimensional tolerances.
Q: What does "SMLS" mean, and how is it different from welded?
A: Seamless pipe, made by piercing a solid billet. It has no longitudinal seam, often considered more uniform for high pressure but with thicker walls and size limitations.
Q: What is "piling pipe," and what standards might apply?
A: Pipe used as foundations (driven into ground). Common specs include API 5L, ASTM A252, or EN 10219 for durability and strength.
Q: What is the significance of the "Carbon Equivalent" (CE) value?
A: A formula (e.g., IIW, Pcm) estimating the hardenability and weldability of steel. A higher CE means greater risk of HAZ cracking, requiring preheat or specific welding methods.
Q: What does "HIC Test" stand for?
A: Hydrogen Induced Cracking Test. It evaluates the steel's resistance to stepwise cracking in wet H2S environments.
