JIS G3467 boiler tube specifications
JIS G3467 boiler tubes include carbon steel tubes, alloy steel tubes, stainless steel tubes and nickel-chromium iron alloy tubes. Its application is for heating fluids in open-fire heaters such as boilers in the petrochemical industry.
Mechanical Properties:
| Symbol of class | Division of finish | Tensile strength
N/П {kgf/П} |
Yield point or proof stress
N/П {kgf/П} |
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 | - | 410min{42} | 245 min{25} | 25 min | 20 min | 24 min | 19 min |
| STFA 12 | - | 380min{39} | 205 min{21} | 30 min | 25 min | 24 min | 19 min |
| STFA 22 | - | 410min{42} | 205 min{21} | 30 min | 25 min | 24 min | 19 min |
| STFA 23 | - | 410min{42} | 205 min{21} | 30 min | 25 min | 24 min | 19 min |
| STFA 24 | - | 410min{42} | 205 min{21} | 30 min | 25 min | 24 min | 19 min |
| STFA 25 | - | 410min{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 | Â | Â | Â | Â | Â | Â | Â | Â | Â | |
| 65 | 2 1/2 | 76.3 | Â | 7.97 | 8.79 | 9.60 | 10.4 | 11.2 | 12.0 | 13.5 | 15.6 | Â | Â | Â | Â | Â | Â | Â | Â | Â | |
| 80 | 3 | 89.1 | Â | 9.39 | 10.4 | 11.3 | 12.3 | 13.2 | 14.2 | 16.0 | 18.6 | 21.2 | Â | Â | Â | Â | Â | Â | Â | Â | |
| 90 | 3 1/2 | 101.6 | Â | 10.8 | 11.9 | 13.0 | 14.1 | 15.2 | 16.3 | 18.5 | 21.6 | 24.6 | 27.5 | Â | Â | Â | Â | Â | Â | Â | |
| 100 | 4 | 114.3 | Â | Â | 13.5 | 14.8 | 16.0 | 17.3 | 18.5 | 21.0 | 24.6 | 28.0 | 31.4 | 34.6 | Â | Â | Â | Â | Â | Â | |
| 125 | 5 | 139.8 | Â | Â | 16.6 | 18.2 | 19.8 | 21.4 | 22.9 | 26.0 | 30.5 | 34.9 | 39.2 | 43.4 | 48.8 | Â | Â | Â | Â | Â | |
| 150 | 6 | 165.2 | Â | Â | Â | 21.7 | 23.6 | 25.4 | 27.3 | 31.0 | 36.5 | 41.8 | 47.1 | 52.2 | 58.9 | 65.3 | Â | Â | Â | Â | |
| 200 | 8 | 216.3 | Â | Â | Â | Â | Â | 33.6 | 36.1 | 41.1 | 48.4 | 55.7 | 62.8 | 69.8 | 79.0 | 88.0 | 96.8 | 105 | Â | Â | |
| 250 | 10 | 267.4 | Â | Â | Â | Â | Â | 41.8 | 45.0 | 51.2 | 60.4 | 69.6 | 78.0 | 87.5 | 99.2 | 111 | 122 | 133 | 149 | 165 | |
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