What is Stainless steel pipe?
Stainless steel pipe is a hollow long round steel, mainly widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used as furniture and kitchen utensils.
According to the material, stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, and bimetal composite pipes, coating and coating pipes to save precious metals and meet special requirements. .
According to the production method, stainless steel pipes are divided into two categories: seamless pipes and welded pipes. Seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes and extruded pipes. Processing; welded pipes are divided into straight seam welded pipes and spiral welded pipes.
According to the purpose, it can be divided into oil well pipes (casing pipe, oil pipe and drill pipe, etc.), pipeline pipes, boiler pipes, mechanical structure pipes, hydraulic prop pipes, gas cylinder pipes, geological pipes, chemical pipes (high pressure fertilizer pipes, petroleum cracking pipes) ) and marine pipes, etc.
Stainless steel pipes can be divided into Cr series (400 series), Cr-Ni series (300 series), Cr-Mn-Ni (200 series) and precipitation hardening series (600 series) according to the composition.
200 Series—Chromium-Nickel-Manganese Austenitic Stainless Steel 300 Series—Chromium-Nickel Austenitic Stainless Steel.
Stainless steel pipe production process
1. Hot rolled (extruded) seamless steel pipe:
Round tube billet → heating → piercing → three-roll cross rolling, continuous rolling or extrusion → tube removal → sizing (or reducing) → cooling → straightening → hydraulic test (Or non-destructive flaw detection) → mark → warehousing
2.Cold rolled (drawn) seamless steel pipe:
Round tube blank → heating → piercing → heading → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → billet tube → heat treatment → straightening →Hydraulic test (flaw detection)→Marking→Warehousing.
Stainless steel pipe application
auto industry
Stainless steel is mainly used in the exhaust system, which accounts for more than 1/2 of the total amount of stainless steel used in automobiles, and 80% is ferritic stainless steel. The exhaust gas produced by the car engine passes through the exhaust gas intake pipe, front pipe, hose, converter, center pipe and finally flows out of the muffler. Exhaust system commonly used steel grades are 409L, 436L and so on. Automobile mufflers mainly use stainless steel welded pipes. According to estimates, the stainless steel pipes used in automobiles account for about 1.5% of the entire downstream consumption of stainless steel pipes, while the ratio of stainless steel seamless pipes and welded pipes is about 2:1.
petrochemical industry including fertilizer industry
There is a huge demand for stainless steel pipes. The industry mainly uses stainless steel seamless pipes. The specifications include: 304, 321, 316, 316L, 347, 317L, etc., the outer diameter is about ￠18-￠610, and the wall thickness is 6mm-50mm. Left and right (generally, medium and low pressure pipelines with specifications above Φ159mm are selected), and the specific application fields are: furnace tubes, material delivery tubes, heat exchanger tubes, etc.
Fluid transportation such as water and gas
Stainless steel pipes and their water delivery equipment are the most advanced basic water purification materials in the world today, with strong anti-corrosion performance, which cannot be compared with cast iron pipes, carbon steel pipes, plastic pipes, etc.
The best material for water industry such as water preparation, storage, transportation, purification, regeneration, seawater desalination, etc. The annual demand is about 25,000 tons.
Equipment Manufacturing and Repair
The annual consumption of stainless steel pipes is more than 20,000 tons. This type of industry mainly uses sanitary or antibacterial grade stainless steel pipes. The sanitary seamless pipe made of imported SUS304 and 316L can meet the special requirements of various media in the fields of food and biopharmaceuticals. Antibacterial stainless steel has the advantages of stainless steel and good antibacterial properties, and its demand is increasing in kitchen equipment, food industry workbenches and utensils, medical equipment, tableware and towel hanging racks in daily life, and refrigerated cabinet brackets.
We supply and export Stainless steel pipe in following countries
Malaysia, United Arab Emirates, Indonesia, Saudi Arabia, Iran, Qatar, India, China, United Kingdom, Singapore, Canada, Thailand, Korea, Turkey, Philippines, Egypt, Germany, Italy, Japan, Russia, Vietnam, Australia, South Africa , Portugal, Morocco, Costa Rica, Kazakhstan, Netherlands, Mexico, Brazil, France, Spain, Nigeria, Bangladesh, Kuwait, Iraq, Ukraine, Poland, Jordan, Romania, Oman, Hong Kong, Venezuela, Colombia, Norway, Chile, Te Trinidad and Tobago, Greece, Czech Republic, Belgium, Sri Lanka, Cyprus, Angola, Myanmar (Burma), United Kingdom, Canada, Korea, Thailand, Netherlands, Spain, Turkey, Australia, Mexico, Pakistan, Vietnam, Brazil, Philippines, France, Taiwan, Poland, South Africa, Russia, Nigeria, Kuwait, Czech Republic, Norway, Romania, Egypt, Oman, Sweden, Belgium, Hong Kong, Israel, Colombia, Switzerland, Denmark, Finland, Argentina, Venezuela, Peru, Ukraine , Chile, Bangladesh, Portugal, Ireland, Austria, Algeria, Greece, Iraq, New Zealand, Slovakia, Hungary, Kazakhstan, Slovenia, Lithuania, Serbia, Sri Lanka, Bahrain, Bulgaria, Morocco, Tunisia, Croatia, Jordan, Ecuador, Te Trinidad and Tobago, Estonia, Azerbaijan, Ghana, Lebanon, Cyprus, Dominican Republic, Latvia, Libya, Costa Rica, Cambodia, Macedonia (FYROM), Belarus, Jamaica, Palestine, Turkmenistan Belarus, Jamaica, Palestine, Turkmenistan Belarus, Jamaica, Palestine, Turkmenistan and other countries
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