The specification range of commonly used welded steel pipes is 6 to 150mm nominal diameter
Seamless steel pipes, which are also the most used in industrial pipelines, have the largest variety of specifications.
The types of steel pipes are divided into two main categories: seamless steel pipes for fluid transport and seamless steel pipes with special features. The former is a steel pipe commonly used in process pipelines, the latter, such as boiler tubes, cracking furnace tubes and heat exchangers with steel tubes.
Steel pipes can be divided by material: carbon seamless steel pipes, chromium-molybdenum seamless steel pipes and stainless, acid-resistant seamless steel pipes.
Steel pipes can be divided by nominal pressure: low pressure (0 ≤ 1.0MPa), medium pressure (1.0 < 10MPa =, high pressure (≥ 10MPa) three categories.
The process piping of small air separation unit is commonly used in seamless steel pipes for fluid transportation, mainly divided into carbon seamless steel pipes and high pressure seamless steel pipes. Carbon seamless steel pipes are widely used for conveying various media that are not corrosive to steel, such as conveying steam, oxygen, compressed air, oil and oil and gas. High pressure seamless steel tubes are mostly used in petrochemical plants, commonly used to transport raw material gas, hydrogen and nitrogen, synthesis gas, water vapour, high pressure condensate and other media.
Dear air separation production design and welding of various steel pipes oxygen piping, high quality to meet the application of small air separation unit, to protect the design and installation and safe operation of small air separation units, large air separation units and liquid air separation plants.
