JIS G3467 boiler tube specifications

JIS G3467 Boiler Tube Specifications

JIS G3467 boiler tubes are widely used in the petrochemical industry for heating fluids in open-fire heaters, such as boilers. These tubes are available in various materials, including carbon steel, alloy steel, stainless steel, and nickel-chromium iron alloys. Each type is selected based on the specific application requirements, such as temperature resistance, corrosion protection, and mechanical strength.

Mechanical Properties:

Class Symbol Finish Type Tensile Strength

N/mm²

{kgf/mm²}

 Yield Point or Proof Stress

N/mm²

{kgf/mm²}

 Elongation %
No. 11 Test Piece

No. 12 Test Piece

 No. 5 Test Piece No. 4 Test Piece
Longitudinal Direction Transverse Direction Longitudinal Direction Transverse Direction
STF 410 - 410 min {42} 245 min {25} 25 min 20 min 24 min 19 min
STFA 12 - 380 min {39} 205 min {21} 30 min 25 min 24 min 19 min
STFA 22 - 410 min {42} 205 min {21} 30 min 25 min 24 min 19 min
STFA 23 - 410 min {42} 205 min {21} 30 min 25 min 24 min 19 min
STFA 24 - 410 min {42} 205 min {21} 30 min 25 min 24 min 19 min
STFA 25 - 410 min {42} 205 min {21} 30 min 25 min 24 min 19 min


Dimension Tolerance:

Nominal Diameter Outside Diameter (mm) Wall Thickness (mm) 4.0 4.5 5.0 5.5 6.0 6.5 7.0 8.0 9.5 11.0 12.5 14.0 16.0 18.0 20.0 22.0 25.0 28.0
A B
50 2 60.5 5.57 6.21 6.84 7.46 8.06 8.66 9.24 10.4 11.9                
65 2 1/2 76.3   7.97 8.79 9.60 10.4 11.2 12.0 13.5 15.6                
80 3 89.1   9.39 10.4 11.3 12.3 13.2 14.2 16.0 18.6 21.2              
90 3 1/2 101.6   10.8 11.9 13.0 14.1 15.2 16.3 18.5 21.6 24.6 27.5            
100 4 114.3     13.5 14.8 16.0 17.3 18.5 21.0 24.6 28.0 31.4 34.6          
125 5 139.8     16.6 18.2 19.8 21.4 22.9 26.0 30.5 34.9 39.2 43.4 48.8        
150 6 165.2       21.7 23.6 25.4 27.3 31.0 36.5 41.8 47.1 52.2 58.9 65.3      
200 8 216.3           33.6 36.1 41.1 48.4 55.7 62.8 69.8 79.0 88.0 96.8 105  
250 10 267.4           41.8 45.0 51.2 60.4 69.6 78.0 87.5 99.2 111 122 133 149 165

These specifications ensure that JIS G3467 boiler tubes meet strict quality and performance standards. The mechanical properties and dimensional tolerances are crucial for ensuring safe and efficient operation in high-temperature environments. When selecting the appropriate tube material and size, it's important to consider the operating conditions, including pressure, temperature, and fluid type, to ensure long-term reliability and performance.

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