jIS G3454


JIS G3454 Steel Pipe

JIS G3454 is a Japanese standard that specifies carbon steel pipes designed for pressure conditions at a limited maximum temperature of 350℃. At UNIACERO, we understand the importance of quality and standards. Our steel pipes are manufactured in adherence to the JIS G3454 standard, ensuring they meet the rigorous demands of various industries. Whether you’re in the oil, gas, or water heating sector, our pipes are crafted to withstand pressure and temperature conditions, providing a reliable solution for your needs. If you require pipes for even higher pressure, consider the JIS G 3455 standard. With UNIACERO, you’re not just getting a product; you’re investing in excellence.

JIS G3454 Specification

Our JIS G3454 carbon steel pipes come with precise specifications to meet your project requirements. They can be manufactured as seamless steel pipes or electric-resistance welded steel tubes. The dimensions range from an outside diameter of 20-800mm and a wall thickness of 3-150mm. We offer steel grades STPG370 and STPG410. Each pipe’s end can be customized as a Plain End, Beveled End, or Treaded Protected With a Plastic Cap. Additionally, our pipes undergo meticulous production procedures, ensuring they meet the highest quality standards.

StandardJIS G3454
UsageCarbon Steel Pipes for Pressure Service
Steel GradeSTPG370(STPG38) STPG410(STPG42)STPG410(STPG42)
Manufacturing ProcessessSeamlessERW
OD Range15A-350A or over
WT RangeSCH10,SCH20,SCH30,SCH40,SCH60,SCH80
Pipe EndPE,BE,Thread,Grooved
Pipe SurfaceOil,Vanish,Black,Red,Galvanized,3PE…
Chemical CompositionCSiMnPS
Mechanical PropertiesTensile Strength(Mpa)Yield Strength(Mpa)
ToleranceTolerance on DiameterTolerance on Wall Thickness
Hot-finished Seamless≤40A  [0.5mm]Under 4mm+0.6mm,-0.5mm
50A≤OD≤125A  [1%]4mm or over+15%,-12.5%
150A  [1.6mm]
200A or over  [0.8%]
Cold-finished Seamless and ERW25A or under  [0.3mm]under 3mm+/-0.3mm
32A or over  [0.8%]3mm or over+/-10%
Required TestChemical AnalysisTensile TestFlattening TestBending TestHydrostatic Test of NDT

JIS G3454 Dimension Table


The dimensions of our JIS G3454 carbon steel pipes are meticulously crafted to ensure they fit seamlessly into your projects. With an outside diameter ranging from 20-800mm and a wall thickness between 3-150mm, our pipes are versatile for various applications. When you choose UNIACERO, you’re selecting a partner committed to precision. Every millimeter counts, and we ensure our pipes meet the exact dimensions you require.

Nominal DiameterOutside DiameterNominal Wall Thickness
ABmmSCH 10SCH 20SCH 30SCH 40SCH 60SCH 80
321 1/442.
401 1/
652 1/
903 1/2101.

Chemical Requirements of JIS G3454

At UNIACERO, we understand the importance of the chemical composition in steel pipes. Our JIS G3454 pipes are manufactured with a specific chemical composition that ensures durability, strength, and resistance to corrosion. When you choose our products, you’re investing in pipes that have been crafted with the utmost attention to chemical requirements, ensuring they last longer and perform better.

Symbol of GradeCSiMnPS
STPG3700.25 max.0.35 max.0.30 to 0.900.040 max.0.040 max.
STPG4100.30 max.0.35 max.0.30 to 1.000.040 max.0.040 max.
Other alloy elements than those given in this table may be added as required.

Mechanical Requirements of JIS G3454

Mechanical properties are crucial for steel pipes, especially when used in industries that demand high strength and durability. Our JIS G3454 carbon steel pipes are designed to meet specific mechanical requirements, ensuring they can handle the pressures of your projects. With UNIACERO, you’re choosing pipes that won’t let you down.

Tensile Strength,Yield Point Or Proof Stress,And Elongation
Symbol of GradeTensile Strength N/mm2Yield Point or proof N/mm2Elongation %
Test pieces No.11 Test pieces No.12Test pieces No.5Test pieces No.4
Parallel to pipe axisPerpendicular to pipe axisParallel to pipe axisPerpendicular to pipe axis
STPG370370 min.215 min.30 min.25 min.28 min.23 min.
STPG410410 min.245 min.25 min.20 min.24 min.19 min.
NOTE: 1 N/mm2=1 MPa

Steel Grades in JIS G3454

We offer JIS G3454 carbon steel pipes in two primary steel grades: STPG370 and STPG410. Each grade is designed to meet specific requirements, ensuring you get the right product for your needs. Whether you’re looking for pipes that offer higher tensile strength or those that provide better elongation, UNIACERO has got you covered.

Production Tolerance of JIS G3454

Precision is at the heart of everything we do at UNIACERO. Our JIS G3454 carbon steel pipes come with a dimensional tolerance of +/-1% for the outside diameter and +/- 12% for the wall thickness. This ensures you get pipes that fit perfectly into your projects, reducing wastage and ensuring a seamless fit.

Table Tolerances on Outside Diameter and Wall Thickness
DivisionTolerances on outside diameterTolerances on wall thickness
Hot-finished seamless steel pipe40 A or under ±0,5 mmUnder 4 mm + 0.6mm, -0.5mm 4 mm or over  + 15%, -12.5%
50 A or over up to and incl. 125 A  ± 1%
150 A  ± 1.6mm
200 A or over  ±0.8%
For the pipe of nominal size 350 A or over.the tolerances on outside diameter may be determined by the measurement of the length of circumference.In this case, the tolerances shall be±0.5%
Cold-fnished seamless steel pipe and electric resistance welded steel pipe25 A or under     ± 0.3mmUnder 3 mm  ±0.3mm 3 mm or over  ±10%
32 A or over   ±0.8%
For the pipe of nominal size 350 A or over.the tolerances on outside diameter may be determined by the measurement of the length of circumference.In this case, the tolerances shall be±0.5%

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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