JIS G3461 Carbon Steel Tubes for Boiler and Heat Exchanger

Model NO.
JIS G3461 Carbon Steel Tubes For Boiler And Heat E
Usage
Boiler Pipe
Section Shape
Round
Transport Package
Full
Specification
Customized
Trademark
Shanshui
Origin
Liaocheng
HS Code
7201500010
Production Capacity
5000 Tons/Year
Reference Price
$ 787.50 - 823.50
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Product Description

JIS G3461 Carbon steel tubes for boiler and heat exchanger


JIS G3461  carbon steel tubes used for exchanging heat between the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes and air preheater tubes, etc. of boilers, and heat exchanger tubes, condenser tubes and catalyser tubes, etc. used in chemical and petroleum industries. It is not applicable to the steel tubes for fired heater and steel heat exchanger tubes for low temperature service.
 

JIS G3461 Carbon steel tubes   dimensional and tolerances

outside diameters: 15- 150mm
wall thicknesses: 1-15mm
dimensional tolerances: +/-1% OD ; +/- 12% WT

JIS G3461 Carbon steel tubes   Manufacturing method

The manufacturing method shall be as follows.
Tubes shall be manufactured from the killed steel and by a combination of the tube manufacturing method and the finishing method.
Seamless: S
Electric resistance welded: E
Hot-finished: H
Cold-finished: C
As electric resistance welded: G
 

JIS G3461 Carbon steel tubes   Chemical composition

Symbol C Si Mn P S
STB340 0.18 max. 0.35 max. 0.30 to 0.60 0.035 max. 0.035 max.
STB410 0.32 max. 0.35 max. 0.30 to 0.80 0.035 max. 0.035 max.
STB510 0.25 max. 0.35 max. 1.00 to 1.50 0.035 max. 0.035 max.
 

JIS G3461 Carbon steel tubes   Mechanical properties

Symbol of grade Tensile strength Yield point or proof stress Elongation
%
Outside diameter
Under 10 mm 10 mm or over to and excl. 20 mm 20 mm or over
Test piece
Test piece No. 11 Test piece No. 11 Test piece No. 11
Test piece No. 12
Tensile test direction
N/mm 2 N/mm 2 Parallel to tube axis Parallel to tube axis Parallel to tube axis
STB340 340 min. 175 min. 27 min. 30 min. 35 min.
STB410 410 min. 255 min. 17 min. 20 min. 25 min.
STB510 510 min. 295 min. 17 min. 20 min. 25 min.
 

JIS G3461 Carbon steel tubes   Heat treatment

Normalizing
Low temperature annealing
full annealing
 

JIS G3461 Carbon steel tubes   Appearance

The appearance shall be as follows.
a) Tubes shall be straight for practical purposes with both ends at right angles to thetube axis.
b) The inside and outside surfaces of tubes shall be finished smoothly and free from defects detrimental to use. For the electric resistance welded steel tubes, the convex on inside surface of the weld shall be 0.25 mm or under.
c) The surfaces of tubes may be repaired by grinding, machining or other methods, provided that the wall thickness after repair is within the specified tolerance on wall thickness.
d) The surface of the repaired part shall be smooth along the contour of the tube.
 

JIS G3461 Carbon steel tubes   Tests and Inspection

Chemical analysis
Mechanical tests
Tensile test
Flattening test
Bend test
Hydrostatic test
Non-destructive test
 

 

Steel Pipe & Tube

PNEUTEC.IT, 2023