JIS G3454 ERW Carbon Steel Pipe

Jul 07, 2025

JIS G 3454 is the Japanese industrial standard for carbon steel pipes for pressure systems with a maximum operating temperature of 350°C. The standard includes two grades: STPG 370 and STPG 410. It applies to electric resistance welded (ERW) or seamless pipes with a nominal diameter of 10.5 mm to 660.4 mm (i.e. 6A to 650A, or 1/8B to 26B)

JIS G3454 CS Pipe Specification

Size	21.3mm to 1219.2mm
Wall Thickness	2-50mm
Length	max 12000mm
Standard	JIS G3454, JIS G3445, JIS G3452, JIS G3444
Grade	STPG370, STPG410, STKM13A, STKM14A, SGP, STK290, STK400, STK500
Steel grade	STPG 38, STPG 42
Application	Carbon Steel Pipes for Pressure Service
Dimension Range	10.5-660.4 mm

Carbon Steel Pipes Pressure Service of JIS G3454

KS		ASTM		JIS		DIN		BS
	GRADE		GRADE		GRADE		GRADE		GRADE
D 3562	SPPS 370 SPPS 38	A 53 A 135	Gr A Gr A	G-3454	STPG 370 (STPG 38)	1626 1628 1629 1630 17172	St 37.0 St 37.4 St 37.0 St 37.4 StE240.7	3601 778	ERW 360 S 360 HFS 22 CDS 22 ERW 22
D 3562	SPPS 410 SPPS 42	A 53 A 135	Gr B Gr B	G-3454	STPG 410 (STPG 42)	1626 1628 1629 1630 17172	St 44.0 St 44.4 St 44.0 St 44.4 StE290.7	3601	ERW 360 S 360 HFS 27 CDS 27 ERW 27

Nominal Size

Outside Diameter
mm.

Thickness
mm.

Weight (plain end)
kg/m.

Hydrostatic Test Pressure

mm.

Class 2
kgf/cm2.

Class 3
kgf/cm2.

15
20
25
32
40
50
65
80
90
100
125
150
200
250
300
350
400

1/2"

3/4"

1 1/4"

1 1/2"

2 1/2"

3 1/2"

10"

12"

14"

16"

21.70
27.20
34.00
42.70
48.60
60.50
76.30
89.10
101.60
114.30
139.80
165.20
216.30
267.40
318.50
355.60
406.40

2.80
2.90
3.40
3.60
3.70
3.90
5.20
5.50
5.70
6.00
6.60
7.10
8.20
9.30
10.30
11.10
12.70

1.31
1.74
2.57
3.47
4.10
5.44
9.12
11.30
13.50
16.00
21.70
27.70
42.10
59.20
78.30
94.30
123.00

50
50
50
70
70
70
70
70
100
100
100
100
100
100
100
70
70

50
50
50
100
100
100
100
100
100
100
100
100
120
100
100
100
100

JIS G3454 Chemical Composition

Grade	Chemical Composition%
Grade	C	Si	Mn	P	S
STPG 370	0.25 max	0.35 max	0.30~0.90	0.040 max	0.040 max
STPG 410	0.30 max	0.35 max	0.30~1.00	0.040 max	0.040 max

Schedule No.	10	20	30	40	60	80
Test pressure	20 {20}	35 {34}	50 {49}	60 {59}	90 {88}	120 {118}

Mechanical Property of CS G3454

Letter symbol of grade	Tensile strength	Yield point or proof stress	Elongation %
	kgf/mm2 {N/mm2}	kgf/mm2 {N/mm2}	No.11 and No.12 test pieces	No. 5 test pieces	No. 4 test piece
	kgf/mm2 {N/mm2}	kgf/mm2 {N/mm2}	Longitudinal	Transverse	Longitudinal	Transverse
STPG 370	38 {373}min	22{216} min	30 min	25 min	23 min	28 min
STPG 410	42{412}min	25{245} min	25 min	20 min	19 min	24 min

Tolerances on Outside Diameter and Wall Thickness of Carbon Steel Pipe

Division	Tolerances on outside diameter	Tolerances on wall thickness
Hot-finished seamless steel pipe	40 A or under 0.5mm	Under 4mm
	50A or over up to and incl. 125 A 1%	+0.6mm -0.5mm 4mm or over +15% -12.5%
	150A 1.6mm
	200A or over 0.8% For the pipe of nominal size 350 A or over, the tolerances on outside diameter may be determined by the measurement of the length of circumference. In this case, the tolerances shall be 0.5%.
Cold-finished seamless steel pipe and electric resistance welded steel pipe	25 A or under 0.3mm	Under 3mm 0.3mm 3mm or over 10%
	32 A or over 0.8% For the pipe of nominal size 350 A or over, the tolerances on outside diameter may be determined by the measurement of the length of circumference. In this case, the tolerances shall be 0.5%.	Under 3mm 0.3mm 3mm or over 10%