JIS G3462

JIS-G3462-STEEL-PIPE

JIS G3462 Steel Pipe

JIS G3462 is a renowned Japanese Industrial Standard that outlines the specifications for alloy steel tubes, specifically designed for high-temperature applications. These tubes are pivotal in industries requiring efficient heat transfer, such as boilers, heat exchangers, and fired heaters. Manufactured using a combination of methods, these tubes are available in several grades, including STBA12, STBA13, STBA20, and STBA22. The U-bend tubes, crafted through the cold-bending process, also adhere to this standard, ensuring reliability and efficiency for our clients.

JIS G3462 Specification

Our JIS G3462 alloy steel tubes range in outside diameter from 15.9 mm to 139.8 mm. These tubes are manufactured either through a seamless process or by electric resistance welding. Specific grades, such as STBA 23 to STBA 26, are exclusively produced using the seamless method. All tubes undergo rigorous heat treatment ensuring their durability and resilience. Clients can also expect plain end finishing on the tube ends unless specified otherwise.

Production StandardJIS G3462
Manufacturing ProcessesERW (Electric Resistance Welding)
SMLS (Hot Finished Seamless)
SMLS (Cold Drawn Seamless)
Outside Diameter15.9mm – 139.8mm (1/4″ – 5″)
Wall Thickness1.65mm – 25.4mm
Pipe Length1.5 – 18 meters
Steel GradeJIS G3462 STBA12JIS G3462 STBA23
JIS G3462 STBA13JIS G3462 STBA24
JIS G3462 STBA20JIS G3462 STBA25
JIS G3462 STBA22JIS G3462 STBA26
Corrosion PreventionLacquer, Varnish, Oiling, Galvanizing
End ProcessesSquare Cut, Bevelling, Threading, Grooving
Further ProcessingWelding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

JIS G3462 Dimension Table

schematic-diagram-of-pipe-dimension

The tubes under the JIS G3462 standard are available in a wide range of dimensions, catering to various industrial needs. With an outside diameter ranging from 15.9 mm to 139.8 mm, our tubes are versatile and adaptable. Whether you require U-bend tubes or straight ones, we ensure that each product meets the exacting standards set by JIS G3462.

Outside Diameter mmThickness mm
1.21.62.02.32.62.93.23.54.04.55.05.56.06.57.08.09.511.012.5
15.9
19.0
21.7
25.4
27.2
31.8
34.0
38.1
42.7
45.0
48.6
50.8
54.0
57.1
60.3
63.5
70.0
76.2
82.6
88.9
101.6
114.3
127.0
139.8

Chemical Requirements of JIS G3462

Our JIS G3462 tubes are manufactured with precise chemical compositions to ensure their robustness and longevity. Each grade, from STBA12 to STBA26, has specific chemical requirements, ensuring the tubes’ resistance to high temperatures and corrosion. Elements like Carbon, Silicon, Manganese, Phosphorus, Sulfur, Chromium, and Molybdenum are meticulously balanced to provide optimal performance.

Designation of GradeCSiMnPSCrMo
STBA 120.10 to 0.200.10 to 0.500.30 to 0.800.035 max.0.035 max.0.45 to 0.65
STBA 130.15 to 0.250.10 to 0.500.30 to 0.800.035 max.0.035 max.0.45 to 0.65
STBA 200.10 to 0.200.10 to 0.500.30 to 0.600.035 max.0.035 max.0.50 to 0.800.40 to 0.65
STBA 220.15 max.0.50 max.0.30 to 0.600.035 max.0.035 max.0.80 to 1.250.45 to 0.65
STBA 230.15 max.0.50 to 1.000.30 to 0.600.030 max.0.030 max.1.00 to 1.500.45 to 0.65
STBA 240.15 max.0.50 max.0.30 to 0.600.030 max.0.030 max.1.90 to 2.600.87 to 1.13
STBA 250.15 max.0.50 max.0.30 to 0.600.030 max.0.030 max.4.00 to 6.000.45 to 0.65
STBA 260.15 max.0.25 to 1.000.30 to 0.600.030 max.0.030 max.8.00 to 10.000.90 to 1.10

Mechanical Requirements of JIS G3462

Mechanical properties are paramount in ensuring the tubes’ resilience under high-temperature conditions. Our tubes, from grades STBA12 to STBA26, meet the stringent tensile property requirements, yield points, and elongation percentages as outlined by the JIS G3462 standard. This ensures that our tubes can withstand the rigors of high-temperature applications.

Designation of GradeTensile Strength N/mm2Yield Point or Proof Stress N/mm2
STBA 12380 min.205 min.
STBA 13410 min.
STBA 20
STBA 22
STBA 23
STBA 24
STBA 25
STBA 26
NOTE:1 N/mm2=1 MPa

Steel Grades in JIS G3462

We offer a diverse range of steel grades under the JIS G3462 standard, including STBA 12, STBA 13, STBA 20, STBA 22, STBA 23, STBA 24, STBA 25, and STBA 26. Each grade is tailored for specific applications and environments, ensuring that our clients receive the best product for their needs.

Production Tolerance of JIS G3462

Mechanical properties are paramount in ensuring the tubes’ resilience under high-temperature conditions. Our tubes, from grades STBA12 to STBA26, meet the stringent tensile property requirements, yield points, and elongation percentages as outlined by the JIS G3462 standard. This ensures that our tubes can withstand the rigors of high-temperature applications.

Table Tolerances on Outside Diameter
Category of outside diameterToleranoes on outside diameter
Hot finished seamless steel tubeCold finished seammless steel pipeAs electric resistance weldedsteel steel tube a)Cold finished electric resistance welded steel tube
Under 25+ 0.4 -0.8±0.10±0.15±0.10
25 or over to and excl. 40±0.15±0.20±0.15
40 or over to and excl. 50±0.20±0.25±0.20
50 or over to and excl. 60±0.25±0.3±0.25
60 or over to and excl. 80±0.3±0.4±0.3
80 or over to and excl. 100±0.4+0.4 -0.6±0.4
100 or over to and excl.120+ 0.4 -1.2+ 0.4 -0.6+ 0.4 -0.8+ 0.4 -0.6
120 or over to and excl.160+ 0.4 -0.8+ 0.4 -1.0+ 0.4 -0.8
160 or over to and excl.200+ 0.4 -1.8+ 0.4 -1.2+ 0.4 -1.2+ 0.4 -1.2
200 or over+ 0.4 -2.4+ 0.4 -1.6+ 0.4 -1.6+ 0.4 -1.6
Table Tolerances on wall thickness and wall thickness deviation a)
ToleranceWall thicknessHot fnished seamless steel tubeCold fnished seamless steel tubeElectric resistance weldedsteel steel tube a)
Outside diameter mm
Under 100100 or overUnder 4040 or overUnder 4040 or over
Tolerance on wal lthicknessUnder 2+0.4mm 0+22% 0+0.3mm 0+18% 0
2 or over to and excl.2.4+40% 0+20% 0+18% 0
2.4 or over to and excl.3.8+35% 0+35% 0
3.8 or over to and excl.4.6+33% 0+33% 0
4.6 or over+28% 0+28% 0
Tolerance on wal lthickness deviation b5.6 or overWithin 22.8 % of wall thickness

Reference Resource

Our Advantages

  1. Over 25 years of experience in pipeline production and installation.
  2. Comprehensive inspection equipment.
  3. Independent product serial numbers for traceability.
  4. Advanced production equipment – Seamer high-frequency welding machine from the United States.
  5. Complete qualifications – API 5L/API 5CT/FM/UL fire pipe certification, etc.
  6. Wide range of products – independently developed solar torque tubes, highly favored in the European market.
  7. Customers spread across the globe.
  8. Excellent after-sales service and sense of responsibility.

Application Scenarios

Our steel pipes are engineered to withstand high temperatures, corrosive environments, and varying pressures, ensuring reliability and safety in the complex petrochemical processes. 

Whether it’s transferring crude oil, natural gas, or chemical intermediates, the robustness and versatility of steel pipes make them indispensable components of the plant’s infrastructure, contributing to efficient production and maintenance of stringent safety standards.

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