Stainless steel application technology for building structure(1)

01/giu/2018 03:22:00 stainless steel Contatta l'autore

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1. Application of stainless steel in building structure

In general, the concept of 347 Stainless Steel Tubing is that it is a "rustless", "expensive" metal material, and it is an ornamental decorative material in the design when it requires the "metal tone". However, the use of stainless steel as a structural steel for water supply equipment and building structures has not been widely recognized because of its maximum characteristic “does not rust”. On the other hand, stainless steel is used as a corrosion-resisting steel for welded structures. It is used in chemical equipment, transportation machinery, energy machinery, etc. Although the industry is limited, based on the application results obtained, stainless steel is being used in the following fields. Advance to achieve a high durability of the structure and reduce the maintenance burden.

1) River structure

These devices are in a corrosive environment that is in contact with water for a long period of time and are complex structures that are difficult to maintain. Therefore, they have been stainless steel since very early (difficult gate bodies and water pipes are difficult to apply, and it is difficult to maintain them by painting. Eroded gate drives, valves, etc., and the use of standards have also been revised.

2) Water pipes and water supply devices

Stainless steel has been used for water pipe facilities such as water pipe racks that facilitate maintenance management and have a low impact on water quality. Recently, stainless steel is being used for facilities such as distribution tanks, elevated water tanks, and disaster prevention water storage tanks.

3) Bridges

Although stainless steel is currently used in bridges, Europe is the center of stainless steel used in bridges. Most of the bridges used are small-scale bridges such as pedestrian bridges for ornamental purposes, and reports have been obtained to reduce the effect of LCC. They have now been used for large-scale bridges to improve the service life of bridges. The Stonecutters Bridge, currently under construction in Hong Kong, is the largest steel-concrete composite cable-stayed bridge in the world. The bridge's main tower upper shell and lower rebar use a lot of stainless steel.

4) Harbor Steel Structure Structures

Stainless steel has been used for serious corrosion of seawater such as trestle bridges and other steel structures to achieve anti-corrosion effect. The use of seawater resistant stainless steel NSSC270 metal liners to prevent corrosion, in the long corrosion resistance, reduce maintenance, etc. are better than the traditional coating or electrical anti-corrosion technology, has been used for important harbor structures.

5) Buildings

In the construction industry, stainless steel is used to decorate building beams. According to this demand, the design standards for stainless steel have been revised since the 1980s. In 2000, stainless steel for building structures was incorporated into Japanese Standardization (JIS) and announced in the revised Building Standards Act, making stainless steel available for general buildings. Its decorative nature has been used for patios, roofs, swimming pool roofs and exterior steps.

In this way, stainless steel gradually expands its application to structures that are dominated by civil buildings to improve durability of structures and reduce maintenance. Although the use of stainless steel and corrosion-resistant structural steel, although the initial cost of the large, but compared with all the use of anti-corrosion technology, some of the use of stainless steel can be used in the early stages of use to reduce the effect of LCC, which is being market understanding.

2, using 316 Stainless Steel Pipe to improve the durability of building structures

When the building is in a salty environment near the coast, stainless steel is prone to pitting corrosion. When stainless steel is used as a decorative material with a metal tone, or when a thin steel plate that does not allow for corrosion allowance is used (such as corrosion protection of metal liners of marine structures mentioned above, metal roofs), it should be selected so as not to be rusted in this environment. The steel grades must also be given anti-corrosion measures in design, construction and maintenance. The current state of use of stainless steel for structural use is to select and use stainless steel as a type of steel that does not "rust or rust" or "significant corrosion."

In fact, in terms of improving the durability of the structure, the idea of ??using stainless steel is to allow stainless steel to have a certain degree of corrosion, but it can suppress the amount of corrosion to ensure the performance of the structure. The stainless steel plate having a large thickness is not used as a rustless steel, but is used as a highly durable steel having a small corrosion rate. In order to carry out such a durable design, it is necessary to understand the corrosion process under the conditions of use, and correctly grasp the influence of the corrosion process on the properties of the structural material, ie strength.

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