Due to the harsh working environment of the ship, the hull shell is subject to chemical corrosion of seawater, electrochemical corrosion and corrosion of marine organisms and microorganisms; the hull is subjected to large wind and wave impacts and alternating loads; the shape of the ship is complicated by processing methods, etc. Steel for hull structure is strictly required. First of all, good toughness is the most critical requirement. In addition, high strength, good corrosion resistance, weldability, forming properties and surface quality are required.
Shipbuilding Steels Our hot rolled shipbuilding steel is produced in accordance with the relevant Classification Society, examples of which include Lloyds Register and Det Norske Veritas.
Our steel products include steel shipbuilding plate, fabricated steel sections and floor plate for decking. We can also supply bulb flats for plate stiffening, structural steel angles and inverted angles.
Our plates are supplied under the ASTM/ASME specification (ASTM A131 / ASME SA 131) which is the standard specification for Structural Steel for Ships. We offer higher strength shipbuilding steels as standard .High strength steels offer significant cost advantages by reducing the weight of the structure in comparison to the steel used.
The plates are suitable for use in the construction of container ships and large cargo freighters as well as commercial shipping lines such as luxury cruise ships and ferries. Supply options include heavy plates, surface treated plates and pre-fabricated sections. In most cases, the steel can also be supplied as hot rolled coils or cut into lengths (sheets).
These high yield materials are commonly used in the construction of hulls and superstructures for large shipping vessels. The grades are exclusively for shipbuilding use as set out in the standard.
Ship Building Steel Plate,Shipbuilding Steel Plate,Marine Steel Plate,Shipbuilding Plate Shandong Guanzhou Iron and Steel Group Co., Ltd. , https://www.guanzhouiron.com
According to reports, China is a big country for the production and use of pesticides. The majority of POPs production enterprises were built in the 1960s and 1970s. They have poor production equipment, poor technology, and no pollution control facilities, causing serious pollution to the surrounding environment. After the ban on the production of some POPs chemicals in the 1980s, most companies did not clean up production facilities and sites. The toxic and hazardous wastes that were cleaned up by individual companies were simply stacked outside the plant area. Most of the storage sites did not have protective measures, resulting in the generation of surrounding soil and groundwater. Serious pollution. In addition, the non-standard piling of waste residue and fly ash containing waste pesticides and two dioxin also exacerbated site pollution. With the urban economic development and industrial and product structure adjustment, especially after the end of the exemption period next year, a large number of POPs production and use enterprises will be gradually shut down or transferred. These POPs-contaminated production sites have become potential sources of pollution and have a great environmental risk.
Zhuang Guotai, director of the office of the Foreign Economic Cooperation Leading Group Office of the Ministry of Environmental Protection, pointed out that environmental risk management of POPs contaminated sites is a prominent environmental issue related to people's livelihood. The Ministry of Environmental Protection attaches great importance to this. Zhuang Guotai said that he hopes that international organizations and bilateral agencies will pay more attention to and pay attention to the problem of POPs contaminated sites. Together with the Chinese government, they will discuss and work together to solve the problem of POPs contaminated sites and provide financial, technical and management support. In addition, relevant domestic experts must also provide strong technical support.
The management of POPs contaminated sites in China cannot be delayed
China's management in the field of contaminated sites has only just begun. Policies, standards, technologies, and funding mechanisms are all left blank, and regulatory capacity and public awareness need to be improved. The initiation of POPs (Persistent Organic Pollutants) contaminated site management work has become an urgent task. This is what the reporter learned from the International Symposium on Contaminated Sites of POPs held in China from May 23 to 24.