JIS G3461 STB340 Seamless Carbon Steel Tube for Boiler and Heat Exchanger
Product Overview
JIS G3461 STB340 seamless carbon steel tube is designed for boiler and heat exchanger applications where heat transfer occurs between the inside and outside surfaces of the tube.
Manufactured according to JIS G3461 requirements, STB340 carbon steel tubes are commonly used in boiler water tubes, smoke tubes, superheater tubes, air preheater tubes, and heat exchanger equipment.
The STB340 grade is selected for general industrial thermal equipment requiring carbon steel tube solutions with controlled chemical composition, mechanical properties, and dimensional requirements.
Material and Standard
JIS G3461 STB340 Carbon Steel Tube
Standard: JIS G3461
Material Grade: STB340
Material Type: Carbon Steel
Tube Type: Seamless Tube
Application Standard: Boiler and Heat Exchanger Service
JIS G3461 specifies carbon steel tubes used for heat exchange applications, including boiler tubes, heat exchanger tubes, condenser tubes, and related thermal equipment.
Manufacturing Process
JIS G3461 STB340 seamless tubes are manufactured through controlled production processes:
Tube Forming
Steel billets are heated and processed through seamless tube forming methods.
Heat Treatment
Heat treatment is performed according to applicable requirements to achieve specified mechanical properties.
Finishing Process
Final processes may include:
- Cold drawing
- Straightening
- Surface treatment
- Dimensional inspection
The manufacturing process helps achieve required tube dimensions and surface conditions for boiler and heat exchanger fabrication.
Technical Features
Carbon Steel Material Structure
STB340 carbon steel provides a practical material solution for conventional boiler and heat exchanger tube applications.
Seamless Tube Construction
The seamless structure provides uniform tube geometry and is commonly applied in pressure and heat transfer equipment.
Suitable for Thermal Equipment
STB340 tubes are commonly used where controlled tube dimensions and material properties are required for heat exchange systems.
Product Specifications
| Item |
Specification |
| Standard |
JIS G3461 |
| Grade |
STB340 |
| Material |
Carbon Steel |
| Tube Type |
Seamless Tube |
| Shape |
Round Tube |
| Application |
Boiler, Heat Exchanger, Economizer |
| Manufacturing |
Hot Finished / Cold Finished |
| Surface |
Mill Finished / Customized |
| Inspection |
ET, UT, Hydrostatic Test |
Available Dimensions
| Parameter |
Range |
| Outside Diameter |
Customized according to requirements |
| Wall Thickness |
Customized according to requirements |
| Length |
Fixed Length or Customized |
| Surface Condition |
Smooth Surface / Mill Finish |
Applications
Boiler Equipment
STB340 seamless tubes are used in:
- Boiler water tubes
- Smoke tubes
- Superheater tubes
- Economizer tubes
Heat Exchanger Systems
Applications include:
- Shell and tube heat exchangers
- Condenser systems
- Industrial heat transfer equipment
Industrial Facilities
Common industries include:
- Power generation
- Chemical processing
- Petroleum equipment
Quality Control and Inspection
Inspection procedures can include:
Material Inspection
- Chemical composition analysis
- Mechanical property testing
Dimensional Inspection
- Outer diameter measurement
- Wall thickness measurement
- Length inspection
Non-Destructive Testing
- Eddy Current Testing (ET)
- Ultrasonic Testing (UT)
- Hydrostatic Testing
Testing requirements can be adjusted according to customer specifications and project requirements.
Packaging
JIS G3461 STB340 seamless tubes are supplied with suitable protection for transportation.
Packaging options include:
- Steel bundle packaging
- Protective wrapping
- Tube marking according to requirements
Product identification may include:
- Standard designation
- Material grade
- Size information
- Heat number
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