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 designed to meet specific mechanical and operational requirements, ensuring durability and performance under high-temperature conditions.

Mechanical Properties:

Class Symbol	Finish Type	Tensile Strength N/mmÂ² {kgf/mmÂ²}	Yield Point or Proof Stress N/mmÂ² {kgf/mmÂ²}	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		Outer 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	Outer 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
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
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
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
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
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
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
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
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
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

These specifications ensure that JIS G3467 boiler tubes meet strict quality standards, making them suitable for use in high-pressure and high-temperature environments. Proper selection of material and dimensions is essential to ensure optimal performance and safety in industrial applications.

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