JIS G3462 Alloy Steel Tubes for Boiler and Heat Exchanger

Model NO.
JIS G3462 Alloy Steel Tubes For Boiler And Heat Ex
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
$ 769.50 - 805.50
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Product Description

JIS G3462 Alloy Steel Tubes for Boiler and Heat Exchanger


the alloy 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 of boilers, and heat exchanger   tubes, condenser tubes and catalyst tubes used in chemical and petroleum industries.   It is not applicable to the steel tubes for heating furnace and steel heat exchanger   tubes for low temperature service .

G3462 Alloy Steel Tubes  Size

Outside   diamete r:10-200  mm
Wall thickness : 1-20mm
Length: 7meter or under/over
Hot finished OD tolerance: +0.4/-0.8mm
Cold finished OD tolerance: +/-0.1mm
Hot finished WT tolerance: +30/-0%
Cold finished WT tolerance: +20/-0%
 

G3462 Alloy Steel   U-bend tubes

The U-bend tubes shall be made by cold-bending process, and the bending radius   shall be at least 1.5 times the outside diameter of the tube.
The bent portion of the tube shall not be heat treated in general. When required by   the purchaser, the heat treatment may be agreed between the purchaser and the   manufacturer.
 

G3462 Alloy Steel Tubes   manufacturing method

Designation of grade Designation of manudacturing method
Tube manufacturing method Finishing method
Molybdenum steel tube STBA12 Seamless : S Electric resistance welded : E Hot finished : H Cold finished : C As electric resistance welded : G
STBA13
Chromium-molybdenum steel tube STBA20
STBA22
STBA23
STBA24
STBA25 Seamless : S Hot finished : H Cold finished : C
STBA26
 

G3462 Alloy Steel Tubes   Chemical composition

Designation of grade C Si Mn P S Cr Mo
STBA12 0.10 to 0.20 0.10 to 0.50 0.30 to 0.80 0.035 max. 0.035 max. - 0.45 to 0.65
STBA13 0.15 to 0.25 0.10 to 0.50 0.30 to 0.80 0.035 max. 0.035 max. - 0.45 to 0.65
STBA20 0.10 to 0.20 0.10 to 0.50 0.30 to 0.60 0.035 max. 0.035 max. 0.50 to 0.80 0.40 to 0.65
STBA22 0.15 max. 0.50 max. 0.30 to 0.60 0.035 max. 0.035 max. 0.80 to 1.25 0.45 to 0.65
STBA23 0.15 max. 0.50 to 1.00 0.30 to 0.60 0.030 max. 0.030 max. 1.00 to 1.50 0.45 to 0.65
STBA24 0.15 max. 0.50 max. 0.30 to 0.60 0.030 max. 0.030 max. 1.90 to 2.60 0.87 to 1.13
STBA25 0.15 max. 0.50 max. 0.30 to 0.60 0.030 max. 0.030 max. 4.00 to 6.00 0.45 to 0.65
STBA26 0.15 max. 0.25 to 1.00 0.30 to 0.60 0.030 max. 0.030 max. 8.00 to 10.00 0.90 to 1.10

G3462 Alloy Steel Tubes   Heat treatmen t
Designation of grade Heat treatment
STBA12 STBA13 Low temperature annealing, isothermal annealing, full annealing, normalizing or normalizing followed by tempering
STBA20 STBA22 Low temperature annealing, isothermal annealing, full annealing or normalizing followed by tempering
STBA23 STBA24 STBA25 STBA26 Isothermal annealing, full annealing or normaHzing followed by tempering
Notes a) Low temperature annealing shall not be applied to the electric resistance welded steel tube. b) The tempering temperature for STBA 23, STBA 24, STBA 25 and STBA 26 shall be 650 °C or higher.
 

G3462 Alloy Steel Tubes   Appearance

The appearance of tubes shall be as follows.
a) The tube shall be practically straight, and the both ends shall be practically perpendicular to the tube axis.
b) The inside and outside surfaces of the tube shall be finished well without defects   detrimental to use. In the case of electric resistance welded steel tube, the swelling   of inside surface of the weld shall be 0.25 mm or under. The purchaser may specify   the inside swelling to be 0.15 mm or less for tubes of 50.8 mm or under in outside   diameter and 3.5 mm or under in wall thickness.
c) The surface of the tube may be repaired by grinding, machining or other methods,   provided that the wall thickness after repairing still satisfies the specified tolerance on thickness.
d) The surface of repaired part shall be smooth along the contour of the tube.
 

G3462 Alloy Steel Tubes   Tests

Chemical analysis
Mechanical test
Hydraulic test or nondestructive test
 

G3462 Alloy Steel Tubes   Marking

Each tube which passed the inspection shall be marked with the following items.   Tubes may be bundled together and marked for each bundle by a suitable means, when   required by the manufacturer or when the small outside diameter of the tubes is an   obstacle to marking on each tube. The arrangement of items is not specified.
 

 

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