High Strength: Typically made of high-strength low-alloy steels such as S355NL. Excellent Toughness: Especially under low-temperature conditions to prevent brittle fracture. Precision Machining: Strict control over flatness and bolt hole positional tolerances to ensure sealing performance.
Key Attribute
Description / Requirement
Typical Material / Focus
High Strength
Made of high-strength low-alloy (HSLA) steel.
S355NL
Excellent Toughness
Maintained under low-temperature conditions to prevent brittle fracture.
S355NL
Precision Machining
Strict control over flatness and bolt hole positional tolerances.
Ensuring sealing performance
Advantages
The forging process eliminates internal defects like porosity and voids, refines the metal grain structure, and aligns the grain flow circumferentially. This significantly enhances the flange’s tensile strength, bending resistance, and fatigue resistance, making it far superior to cast or welded alternatives.