China Classification Society (CCS) is a full member of the International Association of Classification Societies (IACS) and the sole national classification society of China, holding authoritative status in the fields of ships and offshore engineering. Its "Rules for the Classification of Steel Ships" provide comprehensive technical standards for ship design, construction, survey, and material selection, with systematic and stringent requirements for hull structural steel plates.

The Korean Register of Shipping (KR) is South Korea’s sole national classification society and a full member of the International Association of Classification Societies. Its "Rules for the Classification of Steel Ships" provide comprehensive technical standards for ship design, construction, and survey, with systematic and stringent requirements for hull structural steel plates.

Nippon Kaiji Kyokai (NK), also known as ClassNK, is a prominent member of the International Association of Classification Societies. Its "Rules for the Survey and Construction of Steel Ships" provide comprehensive technical standards for ship design, construction, and inspection, with strict and systematic requirements for hull structural steel plates.

The American Bureau of Shipping (ABS) is one of the world's leading classification societies and a founding member of the International Association of Classification Societies (IACS). Its "Rules for Building and Classing Steel Vessels" provide authoritative technical standards for ship design, construction, and material selection, with systematic and stringent requirements for hull structural steel plates.

RINA is one of the founding members of the International Association of Classification Societies. Its "Rules for the Classification of Ships and Offshore Units" provide authoritative technical standards for ship design, construction, and material selection, with systematic and rigorous requirements for hull structural steel plates.

Lloyd’s Register (LR) is one of the world's oldest and most influential classification societies, and a founding member of the International Association of Classification Societies (IACS). Its "Rules and Regulations for the Classification of Ships" provide authoritative technical standards for global ship design and construction, with particularly systematic and stringent requirements for hull structural steel plates.

Bureau Veritas (BV) is one of the world's oldest classification societies and a founding member of the International Association of Classification Societies (IACS). Its "Rules for the Classification of Steel Ships" establish comprehensive and stringent technical requirements for marine construction materials, particularly hull structural steel plates.

Germanischer Lloyd, now part of DNV, is one of the world's leading classification societies. Its "Rules for Classification" establish strict and systematic technical requirements for marine construction materials, particularly hull structural steel plates.

The Russian Maritime Register of Shipping (RMRS) is the authoritative Russian classification society for ships and offshore structures. Its "Rules for Classification and Construction of Steel Ships" establish systematic and stringent technical requirements for marine steel, particularly steel plates