{"id":8888,"date":"2024-11-18T17:40:34","date_gmt":"2024-11-18T17:40:34","guid":{"rendered":"https:\/\/www.h-metal.ro\/blog\/?p=8888"},"modified":"2024-11-18T17:40:35","modified_gmt":"2024-11-18T17:40:35","slug":"hot-rolled-naval-plate","status":"publish","type":"post","link":"https:\/\/www.h-metal.ro\/blog\/en\/hot-rolled-naval-plate\/","title":{"rendered":"The naval board and the classification societies of the naval industry"},"content":{"rendered":"
\"hot-rolled<\/figure>\n\n\n\n

Naval plate<\/strong> is a thick hot-rolled plate, with a high resistance to corrosion and abrasion, used in the naval industry for the construction of ships and their various component parts.<\/p>\n\n\n\n

In recent years, greater importance has been given to the safety and durability of ships, as well as to the protection of the sea environment.<\/p>\n\n\n\n

Hot-rolled naval plate sheet is classified into two categories:<\/h2>\n\n\n\n

1. Steel plate <\/a>with normal strength – has a minimum yield strength value of 235 N\/mm2<\/p>\n\n\n\n

Depending on the temperature at which resilience is normalized, three groups are identified:<\/p>\n\n\n\n

– group A, with resilience standardized to O degrees Celsius;<\/p>\n\n\n\n

– with group D, with resilience standardized to -20 degrees Celsius;<\/p>\n\n\n\n

– from group E, with resilience standardized to -40 degrees Celsius.<\/p>\n\n\n\n

2. High-strength steel sheet – has a minimum yield strength between 315 and 390 N\/mm2.<\/p>\n\n\n\n

This group includes steels for shipbuilding supplied in three levels of resistance. Each level is divided by steel brands, in category A, D, E:<\/p>\n\n\n\n

– strength level 32 – symbolized A32, D32, E32, with yield strength 315 N\/mm2;<\/p>\n\n\n\n

– with strength level 36 – symbolized A36, D36, E36, with yield strength 355 N\/mm2;<\/p>\n\n\n\n

– strength level 40 – symbolized A40, D40, E40, with yield strength 390 N\/mm2.<\/p>\n\n\n\n

Classification societies in the naval industry<\/h3>\n\n\n\n

They work according to their own naval registers, which impose regulations and restrictions in the field of naval construction. A comparative analysis of these registers shows that for the naval field there is a technical coherence and an equivalence regarding the prescriptions for most of the characteristics. Thus compatible products are made, with a similar level of quality.<\/p>\n\n\n\n

\"tabla<\/figure>\n\n\n\n

The most important Classification Societies in the shipbuilding industry have joined IACS (International Association of Classification Societies). The members of this association are:<\/p>\n\n\n\n

ABS<\/strong> \u2013 American Bureau of Shipping (USA);<\/p>\n\n\n\n

BV <\/strong>\u2013 Bureau Veritas (France);<\/p>\n\n\n\n

DNV<\/strong> \u2013 Det Norske Veritas (Norway);<\/p>\n\n\n\n

GL<\/strong>\u2013 Germanischer Lloyd (Germany);<\/p>\n\n\n\n

KRS<\/strong> \u2013 Korean Register of Shipping (Korea);<\/p>\n\n\n\n

LRS<\/strong> \u2013 Lloyd’s Register of Shipping (UK);<\/p>\n\n\n\n

NKK <\/strong>\u2013 Nippon Kaiji Kyokai (Japan);<\/p>\n\n\n\n

PRS<\/strong> \u2013 Polski Rejestr Statkow (Poland);<\/p>\n\n\n\n

RINA<\/strong> \u2013 Registro Italiano Navale (Italy);<\/p>\n\n\n\n

IRS <\/strong>\u2013 Indian Register of Shipping (India).<\/p>\n\n\n\n

The classification registers are state institutions, organized for the purpose of verifying and confirming the technical condition of transport ships, as well as certifying their ability to navigate safely.<\/p>\n\n\n\n

Mainly, the naval classification registers elaborate:<\/p>\n\n\n\n

– rules for testing the materials used in the construction of ships, machines and naval installations;<\/p>\n\n\n\n

– for determining the dimensions of construction elements;<\/p>\n\n\n\n

– after which the construction of ships, machines and naval installations is supervised;<\/p>\n\n\n\n

– after which the final acceptance tests of the ship, of the machines and naval installations are performed;<\/p>\n\n\n\n

– rules according to which the visits, by the experts of the register, of the ships in operation are carried out, with the aim of ensuring their good technical condition.<\/p>\n\n\n\n

The Romanian Naval Authority <\/a>operates in Romania, which was born through the merger of the Civil Navigation Inspectorate with the Romanian Naval Registry.<\/p>\n\n\n\n

 Similar articles:<\/p>\n\n\n\n

Brands and grades of steel<\/a><\/p>\n\n\n\n

Why is steel used in construction?<\/a><\/p>\n

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