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JIS G3462 boiler tubes

boiler tube, boiler tubes, heat exchanger tubes, JIS G3462, JIS G3462 STB A12, JIS G3462 STB A13, JIS G3462 STB A24, Seamless pipe, Seamless Pipes, seamless steel tubes, Seamless tube, seamless tubes, steel tube

JIS G3462 is a JIS standard refers to alloy steel boiler tubes and heat exchanger tubes. This steel tubes is used in carbon steel pipes for tube heat-exchange inside and outside, such as boiler water steel pipe, superheater tube, condenser tube and more.
However, it is not applicable to the steel tubes for heating furnace and steel heat exchanger tubes for low temperature service.

The size range of JIS G3462 boiler tubes(mm):

Outer Dimensions: 19.05mm-168.3mm
Wall Thickness:2.0mm-14 mm
Length: max 19000mm

Application of JIS G346s seamless tubes:

used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superherater tubes, air preheater tubes, etc. of boilers, and heat exchanger industries.
it is not applicable to the steel tubes for heating furnace and those for heat exchangers for low temperature service.

The main products of steel / steel grade:

JIS G3462 STB A12
JIS G3462 STB A13
JIS G3462 STB A24

Corresponding to international standards

ISO 9329-2:1997 Seamless steel tubes for pressure purposes-Technical delivery conditions-Part 2: Unalloyed and alloyed steels with specified elevated temperature properties.
ISO 9330-2:1997 Welded steel tubes for pressure purposes-Technical delivery conditions-Part 2: Electric resistance and induction welded unalloyed and alloyed steel tubes with specified elevated temperature properties.

Delivery Condition:

Heat treatment,Annealed, Normalized, Normalized and Tempered

Surface treatment:

Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
Painting as requested.

Chemical composition of JIS G3462 heat exchanger tubes(%):

Grade	C	Si	Mn	P	S	Cr	Mo
JIS G3462 STB A12	0.10~0.20	0.10~0.50	0.30~0.80	<0 td>	<0 td>	—	0.45~0.65
JIS G3462 STB A13	0.15~0.25	0.10~0.50	0.30~0.80	<0 td>	<0 td>	—	0.45~0.65
JIS G3462 STB A24	<0 td>	<0 td>	0.30~0.60	<0 td>	<0 td>	1.90~2.60	0.87~1.10

Mechanical behavior of JIS G3462 heat exchanger tubes (%):

Grade	tensile strength kgf/mm²{N/mm²}	yield strength kgf/mm²{N/mm²}
JIS G3462 STB A12	<39{382}	<21{206}
JIS G3462 STB A13	<42{412}	<21{206}
JIS G3462 STB A24	<42{412}	<21{206}

Tolerance on Outside Diameter in JIS G3462

O.D.	TOLERANCE ON OUTSIDE DIAMETER
O.D.	HOT ROLLED SEAMLESS PIPES	SEAMLESS PIPES THROUGH QUENCH AND NORMALIZED	COLD DRAWN SEAMLESS PIPES THRONG, THE HOT TREATMENT EXCEPT QUENCH AND NORMALIZED	ELECTRIC WELDED PIPES EXCEPT COLD DRAWN	COLD DRAWN ELECTRIC WELDED PIPES
MM
< td>	+0.4 -0.8	±0.25	±0.10	±0.15	±0.10
<25.40		±0.25	±0.15	±0.20	±0.15
<40-50		±0.25	±0.20	±0.25	±0.20
<50.60		±0.25	±0.25	±0.30	±0.25
<60-80		±0.30	±0.30	±0.40	±0.30
<80.100		±0.40	±0.40	-0.60,+0.40	±0.40
<100-120	+0.4 -1.2	-0.60,+0.40	-0.60,+0.40	-0.80,+0.40	-0.60,+0.40
<120-160	+0.4 -1.2	-0.80,+0.40	-0.80,+0.40	-1.00,+0.40	-0.80,+0.40
<160-200	-1.8,+0.4	-1.20,+0.40	-1.20,+0.40	-1.20,+0.40	-1.20,+0.40
<200	-2.4,+0.4	-1.60,+0.40	-1.60,+0.40	-1.60,+0.40	-1.60,+0.40

Tolerance on Wall Thickness in JIS G3462

WALL THICKNESS (MM)	HOT ROLLED SEAMLESS PIPE		COLD DRAWN SEAMLESS PIPE		ELECTRIC WELDED PIPE
	O.D（MM）		O.D（MM）		O.D（MM）
	< td>	<100	< td>	<40	< td>	<40
	(%)
< td>	-	-	-0,+0.4mm	+22 -0	-0,+0.3mm	+18 0
<2-2.4	-0,+40	-	+20 -,0		+18 -0
<2.4-3.8	-0,+35	-0,+35
<3.8-4.6	-0,+23	-0,+33
<4.6	-0,+28	-0,+28

Tolerance on the Length in JIS G3462

ITEM		TOLERANCE AN LENGTH
OD<50mm td>	<7m td>	-0, +7mm
	<=7m	Every 3m increase in length, the plus tolerance be increased by 3mm with a maximum of 15mm
OD<=50mm	<7m td>	-0, +10mm
	<=7m	Every 3m increase in length, the plus tolerance be increased by 3mm with a maximum of 15mm
OD: Outside Diameter

JIS G3429 Seamless steel tubes

JIS G3429, seamless steel tube, seamless steel tubes, JIS G3429 STH11, JIS G3429 STH12, JIS G3429 STH21, JIS G3429 STH22

JIS G3429 standard specifies the seamless steel tubes, hereinafter referred to as the tube used for the manufacture of seamless steel gas cylinders specified in JIS B8230 and JIS B8241.

Application: Seamless Steel Tubes in High Pressure Gas Cylinder

Standards: JIS G3429
Size range (mm):

Outer Dimensions: 19.05mm ~ 114.3mm
Wall Thickness:2.0mm ~ 14 mm
Length: max 16000mm

The main products of steel / steel grade:

JIS G3429 STH11
JIS G3429 STH12
JIS G3429 STH21
JIS G3429 STH22

Packing:

Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Delivery:

Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
Weight of bundle-up to 5000 kg upon request of customer.
Each bundle is furnished with three tags.

Chemical Compositions(%)

Grade	C	Si	Mn	P	S	Ni	Cr	Mo
STH11	≤0.50	0.10-0.35	≤1.80	≤0.035	≤0.035	/	/	/
STH12	0.30-0.41	0.10-0.35	1.35-1.70	≤0.030	≤0.030	/	/	/
STH21	0.25-0.35	0.15-0.35	0.40-0.90	≤0.030	≤0.030	≤0.25	0.80-1.20	0.15-0.30
STH22	0.33-0.38	0.15-0.35	0.40-0.90	≤0.030	≤0.030	≤0.25	0.80-1.20	0.15-0.30

DIN 1629 Seamless Tubes

DIN1629, DIN1629 ST37.0, DIN1629 ST44.0, DIN1629 ST52.0, seamless steel tubes, Seamless tube

DIN 1629 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.

DIN 1629 Size range (mm):

Outer Dimensions: 6.0mm-219.0mm
Wall Thickness: 1.0mm-30 mm
Length: max 12000mm

Application:

It is used for manufacturing pipeline,vessel,equipment,pipe fittings .
These tubes are prodominantly used in construction of chemical plant, vessels, pipework and for genearl mechanical engineering purpose.

The main products of steel / steel grade:

DIN1629 ST37.0
DIN1629 ST44.0
DIN1629 ST52.0