Seamless carbon steel tubes have a hollow cross-section and are widely used as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, and bicycles. Frames and steel scaffolds used in construction, such as steel scaffolds, are used to make ring parts with steel pipes, which can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing hours, and have been widely used in steel pipes.
The seamless carbon steel tube is derived from solid steel that is in sheet or bar form and then formed into a solid round shape known as “billets” which are then heated and cast over a form such as piercing rod to create a hollow tube or shell. The abbreviation of seamless steel pipe is SMLS pipe.
Fabrication Process
Cangyang Thermal controls strictly on goods quality, from choice of materials to each production process until the tubes are finished and delivered to customers.
Standards of Seamless Carbon Steel Tubes
According to different application, the seamless carbon steel tubes can be divided into several ranges.
Seamless Ferritic & Austenitic Alloy Steel boiler, Superheater & Heat Exchanger Tubes
Standard: ASME SA213M, SA210M (ASTM A213, ASTM A210)
Steel Grade: T2, T5, T9, T11, T12, T22, 210A, 210B, 210C
Outside Diameter: 15.875~76mm
Tube Wall Thickness: 1.65~14mm
Characteristics: These seamless carbon steel tubes applies to high temperature service such as super-heaters and reheaters. The tubes are with precise dimension, good surface and stabilization of property, especially used for high temperature service such as steam boiler and pipeline.
Seamless Steel Carbon Steel Tube for High Pressure Boiler
Standard: GB5310, EN10216
Steel Grade: 20G, 20MnG, 25MoG, 20MoG, 12CrMoG, 15CrMoG, 12CrMoG, 12Cr1MoVG, 195GH, P235GH, P265GH, 20mNnB6, 16Mo3, 8MoB5-4, 14MoV6-3, 10CrMo5-5, 13CrMo4-5, 10CrMo--10
Outside Diameter: 15.875~76mm
Tube Wall Thickness: 1.65~14mm
Characteristics: These seamless carbon steel tubes are applied in high pressure steam boiler and pipeline.
Seamless Carbon Steel Tube for superheater
Standard: SA556, DIN17175, GB/T5310
Steel Grade: SA556 A2, B2, C2/ 16Mo3/ 20G
Outside Diameter: 15.875~32mm
Tube Wall Thickness: 1.3~3mm
Characteristics: These seamless carbon steel tubes applies to super heater uses for power station, including U-tube for tubular water heater. Maximum length can reach 25 meters.
High Pressure Seamless Carbon Steel Tube for Diesel Engine
Standard: DIN73000, DIN2391, GB T3093, GB T8120, EN10305, EN10216
Steel Grade: 10#, 20#, ST37, ST45
Outside Diameter: 3~40mm
Tube Wall Thickness: 0.5~4mm
Characteristics: These seamless carbon steel tubes adopt cold-drawing and thermal treatment craftsmanship and applied in diesel engine, gasoline engine and automobile. This kind of tube is with high precision of inner diameter, inner bore cleanliness and low impurity content.
Cold Drawn Precision Seamless Tube
Standard: GB T3639, GB T8713, DIN2391, EN10305
Steel Grade: 10#, 20#, 35#, 45#, 40Cr, ST35, ST45, ST52, E215, E235, E355.
Outside Diameter: 5~76mm
Tube Wall Thickness: 0.5~14mm
Characteristics: Applied in automobile, absorber, hydraulic pressure facility with its features of high precision and good surface outside and inside.
Seamless Steel Tube for low and medium pressure boiler
Standard: GB T3087
Steel Grade: 10#, 20#
Outside Diameter: 16~76mm
Tube Wall Thickness: 1~14mm
Characteristics: This kind of seamless steel tube applied in low and medium pressure boiler, steam boiler and heater.
Seamless Steel Cold Drawn Low Carbon Steel Heat Exchanger and Condenser Tubes
Standard: ASME SA179
Steel Grade: SA179
Outside Diameter: 10.3~76mm
Tube Wall Thickness: 1.73~13.49mm
Characteristics: Applied to tubular heat exchangers. Condensors and other heat transfer apparatus.
Seamless Carbon Steel Boiler Tubes for High Pressure Service
Standard: ASME SA192
Steel Grade: SA192
Outside Diameter: 10.3~76mm
Tube Wall Thickness: 1.73~13.49mm
Characteristics: Applied to high pressure service boiler tubes.
Mechanical Test done on Seamless Carbon Steel Tubes
Tensile Strength
Flatterning Test
Drifting
Hardness
Eddy Current Detection
Ultrasonic inspection
Leak tightness test
Package
1. Tube ends with plastic caps protected from corrosion.
2. Bundles by woven bags or by wooden case or by steel frame with plywood case.
