JIS A5525

JIS-A5525-Steel-Pipe-Pile

JIS A5525 Steel Pipe

JIS A5525 is a renowned Japanese Industrial Standard that meticulously outlines the specifications for single pipes of welded steel pipe piles. These piles, commonly referred to as “piles,” play a pivotal role in forming the foundation of various structures, ranging from civil engineering works to intricate architectures. Notably, these piles are also instrumental in landslide prevention. The standard predominantly caters to a dimensional range of 318.5 mm to 2,000 mm in outside diameter. As a client of UNIACERO, you can rest assured that our products adhere to this standard, ensuring the highest quality and reliability for your projects.

JIS A5525 Specification

Our steel pipes, compliant with JIS A5525, come with a comprehensive specification that encompasses dimensions, production procedures, steel grades, surface coatings, end types, joint methods, and a plethora of machining services. When you choose our products, you’re not just purchasing steel pipes; you’re investing in a legacy of excellence, precision, and commitment to international standards.

StandardJIS A5525
Dimension318.5-2000mm
Thickness3.2-25.4mm
Pipe length3-18mm
ManufacturingWelded
Steel GradeSKK400
SKK490
ApplicationSpecifies the welded steel pipe piles, used in the
foundation of structures such as civil engineering
works and architecture.
Chemical ComponentCSiMnPS
SKK400≤0.25≤0.04≤0.04
SKK490≤0.18≤0.55≤1.65≤0.035≤0.035
Mechanical propertiesTensile strengthYield strengthElongation,%
SKK400≥400 Mpa≥235 Mpa≥18
SKK490≥490 Mpa≥315 Mpa≥18

JIS A5525 Dimension Table

schematic-diagram-of-pipe-dimension

The dimensional range of our steel pipes, as per JIS A5525, starts from an outside diameter of 318.5 mm and extends up to 2,000 mm. This extensive range ensures that you, our esteemed client, have a plethora of options to choose from, catering to the diverse requirements of your projects.

Outside Diameter mmNominal Wall Thickness mm
318.56.910.3
355.66.47.911.1
400912
406.4912
50091214
50891214
6009121416
609.69121416
7009121416
711.29121416
8009121416
812.89121416
90012141619
914.412141619
100012141619
101612141619
110012141619
1117.612141619
120014161922
1219.214161922
130014161922
1320.814161922
140014161922
1422.414161922
150016192225
152416192225
160016192225
1625.616192225
1800192225
20002225

Chemical Requirements of JIS A5525

The chemical composition of our steel pipes is meticulously crafted to align with JIS A5525. This ensures that the pipes you receive are of the highest quality, offering unparalleled strength and durability for your construction needs.

Class SymbolCSiMnPS
SKK4000.25 max.0.040 max.0.040 max.
SKK4900.18 max.0.55 max.1.65 max.0.035 max.0.035 max.
Alloy elements other than those in this table may be added,as required.

Mechanical Requirements of JIS A5525

In line with JIS A5525, the mechanical properties of our steel pipes are optimized to provide maximum strength, flexibility, and resilience. When you opt for our products, you’re choosing materials that can withstand the test of time and the harshest of conditions.

Class SymbolTensile Strength N/mm2Yield Point or Proof Stress N/mm2Elongation %Tensile Strength of weld N/mm2Flattening Resistance Distance Between Flat Plates(H) (D)is Outside Diameter of Pipe
SKK400400 min.235 min.18 min.400 min.2/3 D
SKK490490 min.315 min.18 min.490 min.7/8 D
NOTE: 1 N/mm2 – 1 MPa

Steel Grades in JIS A5525

We offer steel pipes in two primary grades: SKK400 (SKK41) and SKK490 (SKK50). Each grade is tailored to meet specific structural requirements, ensuring that you always have the right material for the right job.

Production Tolerance ofJIS A5525

Table 5 Shape and dimensional tolerances of single pipe
DivisionToleranceDefinition of symbol
Outsidediameter(D)Pipe end±0.5%Tolerance on outside diameter applies to the measured circumference of the pipe. Conversion between outside diameter (D)and pipe cireumference (i) is given bythe follawing: Where, D: outside diameter (mm): l:circumference (mm ) π:3.1416
Wallthickess(t)Wall thickness under 16 mmOutaide diameter under 500 mm+ Not specified – 0.6mm
Outside diameter 500 mm or over to and exel.800 mm+ Not specified – 0.7mm
Outside diameter 800 mm or over up to and incl.2 000 mm+ Not specified – 0.8mm
Wall thickness16 mm or overOutside diameter under 800 mm+ Not specified – 0.8mm
Outaide diameter 800 mm or over up to and incl.2 000 mm+ Not specified – 1mm

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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