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Brief Introduction of Q345B Seamless Steel Pipes
Jun 03, 2021
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The Q345B seamless steel pipe is a kind of light thin-walled steel pipe with hollow square sections. It is also known as steel refrigeration bending profiles. It is made of Q235 hot rolled or cold rolled strip steel or coil as the base material by cold bending processing and then by high frequency welding made of profile steel with square section shapes. In addition to the thickening of the wall, the size of the corner and the edge flatness of Q345B seamless steel pipes reach or even exceed the level of the resistance welding cold forming square pipes.
Q345B seamless steel pipes
The treatment process of Q345B seamless steel pipes: seamless treament, double-sided submerged arc welded steel pipe, hot rolling, hot galvanized, rolling, etc.
Anticorrosion: epoxy coal pitch, IPN8710 polyethylene, 3PE anti-corrosion, epoxy anti-corrosion, jacket insulation, polyurethane insulation, rock wool insulation thermoelectric engineering.
Theoretical weight scale (unit: kg/m, mm): outer diameter - wall thickness * wall thickness *0.246615* length
The usage of Q345B seamless steel pipes
Construction, machinery manufacturing, iron and steel construction projects, shipbuilding, solar power generation mounting structures, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, car chassis, airports, etc.
The material standards of Q345B seamless steel pipes
1. GB /T8162-2008 (theoretical weight of seamless galvanized steel pipes for structural use)
It is mainly used in general structures and mechanical structures. Its representative materials are: carbon steel, 20 steel, 45 steel; Alloy steel Q345, 20C galvanized steel pipe, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
2. GB/T8163-2008 (seamless steel pipes for fluid conveying)
It is mainly used for conveying fluid pipeline in engineering and large equipment. The representative materials of ceramic composite steel pipes are 20, Q345, etc.
3. GB/T3087-2008 (Seamless steel pipes for low tin-free medium pressure boilers)
It is mainly used for conveying low and medium pressure fluid in industrial boilers and domestic boilers. The representative materials are 10 steel and 20 steel.
4. GB/T5310-2008 (Seamless steel pipes for high pressure boilers)
It is mainly used for high temperature and pressure resistant fluid collection boxes and pipelines on boilers of power stations and Tianjin seamless steel pipe nuclear power plants. The representative materials are 20G, 12Cr1MoVG, 15CrMoG scaffolding of steel pipes, etc.
5. GB5312-2009 (Marine carbon steel and carbon manganese steel seamless steel pipe)
China's seamless steel pipe network is mainly used in ship boilers and super heaters for I, II pressure pipes, etc. The representative materials are 360 steel, 410 steel, 460 steel, etc.
6. GB/T6479-2000 (Seamless steel pipes for high pressure fertilizer equipment)
It is mainly used for transporting high temperature and high pressure fluid pipelines of chemical fertilizer equipment to Tianjin Steel Pipe Group. The representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc.
7. GB/T9948-2006 (Seamless steel pipes for petroleum cracking)
It is mainly used in oil smelting boilers, heat exchange scaffold steel pipes price unit and its fluid conveying pipeline. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.
8. GB/T18248-2000 (Seamless steel pipes for gas cylinders)
It is mainly used to make all kinds of gas welded steel pipes and hydraulic cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc.
The delivery state of Q345B seamless steel pipes is generally in the hot rolling state after heat treatment. The Q345B seamless steel pipe after quality inspection needs to go through the strict manual selection of staff. After quality inspection, the surface coating needs to be done, and then followed by many cold drawing experiments, hot rolling treatments to perforation experiments. If the perforation enlargement is too large, the it needs the straighten correction. After straightening, it will be transmitted to the flaw detector by the conveyor device for the flaw detection test. After it is labeled and specification arrangements, it will be placed in the warehouse.
Q345B seamless steel pipes
The treatment process of Q345B seamless steel pipes: seamless treament, double-sided submerged arc welded steel pipe, hot rolling, hot galvanized, rolling, etc.
Anticorrosion: epoxy coal pitch, IPN8710 polyethylene, 3PE anti-corrosion, epoxy anti-corrosion, jacket insulation, polyurethane insulation, rock wool insulation thermoelectric engineering.
Theoretical weight scale (unit: kg/m, mm): outer diameter - wall thickness * wall thickness *0.246615* length
The usage of Q345B seamless steel pipes
Construction, machinery manufacturing, iron and steel construction projects, shipbuilding, solar power generation mounting structures, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, car chassis, airports, etc.
The material standards of Q345B seamless steel pipes
1. GB /T8162-2008 (theoretical weight of seamless galvanized steel pipes for structural use)
It is mainly used in general structures and mechanical structures. Its representative materials are: carbon steel, 20 steel, 45 steel; Alloy steel Q345, 20C galvanized steel pipe, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
2. GB/T8163-2008 (seamless steel pipes for fluid conveying)
It is mainly used for conveying fluid pipeline in engineering and large equipment. The representative materials of ceramic composite steel pipes are 20, Q345, etc.
3. GB/T3087-2008 (Seamless steel pipes for low tin-free medium pressure boilers)
It is mainly used for conveying low and medium pressure fluid in industrial boilers and domestic boilers. The representative materials are 10 steel and 20 steel.
4. GB/T5310-2008 (Seamless steel pipes for high pressure boilers)
It is mainly used for high temperature and pressure resistant fluid collection boxes and pipelines on boilers of power stations and Tianjin seamless steel pipe nuclear power plants. The representative materials are 20G, 12Cr1MoVG, 15CrMoG scaffolding of steel pipes, etc.
5. GB5312-2009 (Marine carbon steel and carbon manganese steel seamless steel pipe)
China's seamless steel pipe network is mainly used in ship boilers and super heaters for I, II pressure pipes, etc. The representative materials are 360 steel, 410 steel, 460 steel, etc.
6. GB/T6479-2000 (Seamless steel pipes for high pressure fertilizer equipment)
It is mainly used for transporting high temperature and high pressure fluid pipelines of chemical fertilizer equipment to Tianjin Steel Pipe Group. The representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc.
7. GB/T9948-2006 (Seamless steel pipes for petroleum cracking)
It is mainly used in oil smelting boilers, heat exchange scaffold steel pipes price unit and its fluid conveying pipeline. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.
8. GB/T18248-2000 (Seamless steel pipes for gas cylinders)
It is mainly used to make all kinds of gas welded steel pipes and hydraulic cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc.
The delivery state of Q345B seamless steel pipes is generally in the hot rolling state after heat treatment. The Q345B seamless steel pipe after quality inspection needs to go through the strict manual selection of staff. After quality inspection, the surface coating needs to be done, and then followed by many cold drawing experiments, hot rolling treatments to perforation experiments. If the perforation enlargement is too large, the it needs the straighten correction. After straightening, it will be transmitted to the flaw detector by the conveyor device for the flaw detection test. After it is labeled and specification arrangements, it will be placed in the warehouse.
