The development of steel pipe production technology in English began with the rise of the bicycle manufacturing industry, the development of oil in the early 19th century, the manufacture of ships, boilers and aircraft during the two world wars, and the manufacture of thermal power boilers after the Second World War. The development of the chemical industry and the drilling, mining and transportation of oil and gas have all contributed to the development of the steel pipe industry in variety, yield and quality.
Steel pipes are not only used for conveying fluids and powdered solids, exchanging heat energy, making mechanical parts and containers, but also being an economic steel. The use of steel pipes for the manufacture of architectural structure grids, pillars and mechanical supports can reduce weight, save 20 to 40% of metal, and allow industrial mechanized construction. The use of steel pipes to manufacture road bridges not only saves steel and simplifies construction, but also significantly reduces the area of ​​the protective coating and saves investment and maintenance costs. Therefore, any other type of steel cannot completely replace the steel pipe, but the steel pipe can replace some of the profiles and bars. The steel pipe has a great relationship with the development of the national economy and the improvement of human life quality, far better than other steel products. From people’s everyday appliances, furniture, water supply and drainage, gas supply, ventilation and heating facilities to the manufacture of various agricultural machinery and equipment, the development of underground resources, guns and guns used in national defense and aerospace, bullets, missiles, and rockets, steel pipes cannot be separated.
Steel pipes can be divided into two categories according to production methods: seamless steel pipes and seamed steel pipes, and seamed steel pipes are abbreviated as straight steel pipes.
According to the pipe material (steel), the steel pipe can be divided into: carbon pipe and alloy pipe, stainless steel pipe and so on.
According to the pipe end connection, the steel pipe can be divided into: light pipe (without pipe end) and wire pipe (with pipe end with thread).
According to the surface coating characteristics of steel pipes can be divided into: black (not coated) and coated pipe.
(1) GB3087-2008 "Seamless boilers for low and medium pressure boilers" provisions. The chemical composition test method is based on the relevant parts of GB222-84 and GB223 "Methods for chemical analysis of steel and alloys".
(2) GB/T5310-2008 "Seamless steel tubes for high pressure boilers". Chemical composition test method According to the relevant parts of GB222-84 and "Chemical Analysis Method for Steel and Alloys" and GB223 "Method for Chemical Analysis of Steel and Alloys".
(3) Inspection of the chemical composition of imported boiler pipes shall be carried out in accordance with the relevant standards stipulated in the contract.
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Steel pipes are not only used for conveying fluids and powdered solids, exchanging heat energy, making mechanical parts and containers, but also being an economic steel. The use of steel pipes for the manufacture of architectural structure grids, pillars and mechanical supports can reduce weight, save 20 to 40% of metal, and allow industrial mechanized construction. The use of steel pipes to manufacture road bridges not only saves steel and simplifies construction, but also significantly reduces the area of ​​the protective coating and saves investment and maintenance costs. Therefore, any other type of steel cannot completely replace the steel pipe, but the steel pipe can replace some of the profiles and bars. The steel pipe has a great relationship with the development of the national economy and the improvement of human life quality, far better than other steel products. From people’s everyday appliances, furniture, water supply and drainage, gas supply, ventilation and heating facilities to the manufacture of various agricultural machinery and equipment, the development of underground resources, guns and guns used in national defense and aerospace, bullets, missiles, and rockets, steel pipes cannot be separated.
Steel pipes can be divided into two categories according to production methods: seamless steel pipes and seamed steel pipes, and seamed steel pipes are abbreviated as straight steel pipes.
According to the pipe material (steel), the steel pipe can be divided into: carbon pipe and alloy pipe, stainless steel pipe and so on.
According to the pipe end connection, the steel pipe can be divided into: light pipe (without pipe end) and wire pipe (with pipe end with thread).
According to the surface coating characteristics of steel pipes can be divided into: black (not coated) and coated pipe.
(1) GB3087-2008 "Seamless boilers for low and medium pressure boilers" provisions. The chemical composition test method is based on the relevant parts of GB222-84 and GB223 "Methods for chemical analysis of steel and alloys".
(2) GB/T5310-2008 "Seamless steel tubes for high pressure boilers". Chemical composition test method According to the relevant parts of GB222-84 and "Chemical Analysis Method for Steel and Alloys" and GB223 "Method for Chemical Analysis of Steel and Alloys".
(3) Inspection of the chemical composition of imported boiler pipes shall be carried out in accordance with the relevant standards stipulated in the contract.
Information Sources:
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