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 designed to meet specific mechanical and dimensional requirements based on its application.

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


Dimensional Tolerances:

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

These specifications ensure that JIS G3467 boiler tubes are suitable for high-temperature and high-pressure environments, making them essential in industrial applications where reliability and durability are crucial. The data provided helps engineers and manufacturers select the appropriate tube material and size based on their operational requirements.

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