ISO 3183 erw steel pipe

JIS G 3462

  • Size Range: 15.9mm to 139.8mm.
  • Grades: STBA12, STBA13, STBA20, STBA22, STBA23, STBA24, STBA25 and STBA26.

UNIASEN JIS G3462 alloy steel tubes, designed for optimal performance in boiler and heat exchanger applications. These tubes are designed to facilitate efficient heat transfer from the inside to the outside, making them an excellent choice for high-temperature operations.

We offer U-bend tubes made through a precision cold bending process. Whether you need steel tubes for boilers, heat exchangers, or fired heaters, we have the steel grade to meet your specific needs.

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Specification

Standard JIS G3462
Procedure ERW, SMLS
Dimensions 15.9mm – 139.8mm
1/8″ – 5″
DN8 – DN400
Thickness 1.65mm – 25.4mm
SCH 10 – SCH 160
Unit Length 1.5 – 18 mtrs
Steel Grade JIS G3462 STBA12, JIS G3462 STBA23, JIS G3462 STBA13, JIS G3462 STBA24, JIS G3462 STBA20, JIS G3462 STBA25, JIS G3462 STBA22, JIS G3462 STBA26
Surface Coating Varnishing, Black, Oiling, Hot Dip Galvanizing
End Type Square cut, Bevelled, Threaded, Grooved
Joint Method Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Pipe Machining Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

Dimension

Permissible Specified Outside Diameter and Specified Wall Thickness
Specified Outside Diameter D mm (in.) Specified Wall Thickness t mm (in.)
Special Light Sizes a Regular Sizes
≥ 10.3 (0.405) to < 13.7 (0.540) ≥ 1.7 (0.068) to ≤ 2.4 (0.094)
≥ 13.7 (0.540) to < 17.1 (0.675) ≥ 2.2 (0.088) to ≤ 3.0 (0.118)
≥ 17.1 (0.675) to < 21.3 (0.840) ≥ 2.3 (0.091) to ≤ 3.2 (0.125)
≥ 21.3 (0.840) to < 26.7 (1.050) ≥ 2.1 (0.083) to ≤ 7.5 (0.294)
≥ 26.7 (1.050) to < 33.4 (1.315) ≥ 2.1 (0.083) to ≤ 7.8 (0.308)
≥ 33.4 (1.315) to < 48.3 (1.900) ≥ 2.1 (0.083) to ≤ 10.0 (0.394)
≥ 48.3 (1.900) to < 60.3 (2.375) ≥ 2.1 (0.083) to ≤ 12.5 (0.492)
≥ 60.3 (2.375) to < 73.0 (2.875) ≥ 2.1 (0.083) to ≤ 3.6 (0.141) > 3.6 (0.141) to ≤ 14.2 (0.559)
≥ 73.0 (2.875) to < 88.9 (3.500) ≥ 2.1 (0.083) to ≤ 3.6 (0.141) > 3.6 (0.141) to ≤ 20.0 (0.787)
≥ 88.9 (3.500) to < 101.6 (4.000) ≥ 2.1 (0.083) to ≤ 4.0 (0.156) > 4.0 (0.156) to ≤ 22.0 (0.866)
≥ 101.6 (4.000) to < 168.3 (6.625) ≥ 2.1 (0.083) to ≤ 4.0 (0.156) > 4.0 (0.156) to ≤ 25.0 (0.984)
≥ 168.3 (6.625) to < 219.1 (8.625) ≥ 2.1 (0.083) to ≤ 4.0 (0.156) > 4.0 (0.156) to ≤ 40.0 (1.575)
≥ 219.1 (8.625) to < 273.1 (10.750) ≥ 3.2 (0.125) to ≤ 4.0 (0.156) > 4.0 (0.156) to ≤ 40.0 (1.575)
≥ 273.1 (10.750) to < 323.9 (12.750) ≥ 3.6 (0.141) to ≤ 5.2 (0.203) > 5.2 (0.203) to ≤ 45.0 (1.771)
≥ 323.9 (12.750) to < 355.6 (14.000) ≥ 4.0 (0.156) to ≤ 5.6 (0.219) > 5.6 (0.219) to ≤ 45.0 (1.771)
≥ 355.6 (14.000) to < 457 (18.000) ≥ 4.5 (0.177) to ≤ 7.1 (0.281) > 7.1 (0.281) to ≤ 45.0 (1.771)
≥ 457 (18.000) to < 559 (22.000) ≥ 4.8 (0.188) to ≤ 7.1 (0.281) > 7.1 (0.281) to ≤ 45.0 (1.771)
≥ 559 (22.000) to < 711 (28.000) ≥ 5.6 (0.219) to ≤ 7.1 (0.281) > 7.1 (0.281) to ≤ 45.0 (1.771)
≥ 711 (28.000) to < 864 (34.000) ≥ 5.6 (0.219) to ≤ 7.1 (0.281) > 7.1 (0.281) to ≤ 52.0 (2.050)
≥ 864 (34.000) to < 965 (38.000) ≥ 5.6 (0.219) to ≤ 52.0 (2.050)
≥ 965 (38.000) to < 1422 (56.000) ≥ 6.4 (0.250) to ≤ 52.0 (2.050)
≥ 1422 (56.000) to < 1829 (72.000) ≥ 9.5 (0.375) to ≤ 52.0 (2.050)
≥ 1829 (72.000) to < 2134 (84.000) ≥ 10.3 (0.406) to ≤ 52.0 (2.050)
NOTE Standardized values for specified outside diameter and specified wall thickness of pipe are given in ISO 4200 [7] and ASME B36.10M[8]
a Pipe having the combination of specified outside diameter and specified wall thickness is defined as special light size pipe; other combinations given in this table are defined as regular size pipe.

Chemical Requirement

The chemical composition of our JIS G 3462 alloy steel pipes is strictly controlled to ensure durability and efficiency. We carefully maintain the balance of alloying elements such as carbon, manganese, phosphorus, sulfur, silicon and molybdenum to provide the steel pipes with excellent heat resistance, strength and corrosion resistance.

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Mechanical Requirement

Our JIS G 3462 alloy steel pipes can withstand the demanding conditions of high-temperature applications. These steel pipes have high tensile strength, yield strength and elongation, ensuring their durability and reliability. The hardness and impact resistance of the steel pipes are also optimized to resist deformation and damage under high temperature and pressure.

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Designation of Grade C Si Mn P S Cr Mo
STBA 12 0.10 to 0.20 0.10 to 0.50 0.30 to 0.80 0.035 max. 0.035 max. 0.45 to 0.65
STBA 13 0.15 to 0.25 0.10 to 0.50 0.30 to 0.80 0.035 max. 0.035 max. 0.45 to 0.65
STBA 20 0.10 to 0.20 0.10 to 0.50 0.30 to 0.60 0.035 max. 0.035 max. 0.50 to 0.80 0.40 to 0.65
STBA 22 0.15 max. 0.50 max. 0.30 to 0.60 0.035 max. 0.035 max. 0.80 to 1.25 0.45 to 0.65
STBA 23 0.15 max. 0.50 to 1.00 0.30 to 0.60 0.030 max. 0.030 max. 1.00 to 1.50 0.45 to 0.65
STBA 24 0.15 max. 0.50 max. 0.30 to 0.60 0.030 max. 0.030 max. 1.90 to 2.60 0.87 to 1.13
STBA 25 0.15 max. 0.50 max. 0.30 to 0.60 0.030 max. 0.030 max. 4.00 to 6.00 0.45 to 0.65
STBA 26 0.15 max. 0.25 to 1.00 0.30 to 0.60 0.030 max. 0.030 max. 8.00 to 10.00 0.90 to 1.10
Designation of Grade Tensile Strength N/mm2 Yield Point or Proof Stress N/mm2
STBA 12 380 min. 205 min.
STBA 13 410 min.
STBA 20
STBA 22
STBA 23
STBA 24
STBA 25
STBA 26
NOTE:1 N/mm2=1 MPa