Excessive root penetration
Excessive root reinforcement is an overly high root reinforcement that narrows the pipe cross-section and makes it harder for liquids or gases to pass through.
Physical-Chemical Mechanism of Action
Root reinforcement excess occurs due to excessive stress at the weld root, preventing the metal from fully contracting after cooling. This causes the pipe cross-section to bulge.
Metallurgical Relevance & Welding Risks
Excessive root reinforcement excess can lead to blocked pipes, restricting the flow of liquids or gases. Additionally, it can impair the weld microstructure and reduce mechanical strength.
Shop Practice & Action Guidelines
To prevent root reinforcement excess, ensure correct stress settings and adequate cooling after welding. For pipe joints under high pressure or temperature, use special welding methods like replacement welding or filler materials.