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GB13296 -1991 High Pressure Precision Steel Tube For Boiler / Heat Exchangers

GB13296 -1991 High Pressure Precision Steel Tube For Boiler / Heat Exchangers

Brand Name : Torich
Model Number : GB13296-1991
Certification : ISO9001
Place of Origin : China
MOQ : 1000kg
Price : 3000-6000 USD/TON
Payment Terms : L/C, T/T
Supply Ability : 5000tons per year
Delivery Time : 3-4 weeks
Packaging Details : In bundles in wooden box
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Seamless stainless steel tubes for boiler and heat exchanger


Seamless Stainless Steel tubes For Boiler and Heat Exchanger, made according to the Chinese National Standard GB13296-91.


GB13296-91 is a standard applicable for Seamless Stainless Steel pipes which is used for boiler and heat exchanger.


GB13296-1991 Seamless Stainless Steel Tubes for Boiler, Heat Exchangers

0Cr18Ni9 1Cr18Ni9Ti 0Cr18Ni12Mo2Ti


Standard: GB13296-91


Tolerance for seamless stainless boiler tube:


Production MethodSize(mm)Tolerance
Hot Rolling(Extrusion)OD≤140±1.25%
>140±1.0%
WT≤10±12.5%
>10±15%
Cold Drawn(Cold Rolled)OD8~30±0.20mm
>30~50±0.30mm
>50±0.8%
WT1.0~3

+12%

-10%

>3.0

±10%


Length:

The length or general steel tube:

Hot Rolling(Extrusion) tube: 3~12 m

Cold Drawn(Cold Rolled) tube: 3~8 m

The length for water pipe & boiler steel pipe:

Hot Rolling(Extrusion) tube: 4~12 m

Cold Drawn(Cold Rolled) tube: 4~8 m


Bending tolerance:

WT≤15mm, Bending≤1.5mm/m

WT>15mm, Bending≤2.0mm/m


End shape:

Both ends of the pipe should be cut at right angles, and remove burrs


mechanical property

Heat treatment of longitudinal mechanical properties of steel pipe shall according to the standard.

Material

Tensile strength MPa

Yield Strength MPa

Elongation

%

0Cr18Ni952020535
1Cr19Ni952020535
0Cr19Ni1048017535
1Cr18Ni9Ti55020540
0Cr18Ni12Mo2Ti53020535
0Cr26Ni5Mo259039018
1Cr1741024520
00Cr27Mo41024520
1Cr25Ti44024517

Hardness:

For the tubes which W.T. ≥2 mm, Rockwell hardness tests should be taken.


Tests of the seamless boiler tubes:

1.Bending Test:

The tubes should take the bending test when OD ≤22mm. The bending angle is 90 degrees, and the bending radius is 6 times the outer diameter of the steel tube.

2. Hydraulic test;

Eddy current testing, ultrasonic testing can be used instead of hydraulic tests. When eddy current testing, GB/T 7735-1995 Gr. A should be followed; when ultrasonic testing, GB/T 5777-1996 Gr. C8 should be followed.

3. Flattening test

4. Flanging test

5. Expand test



Product Tags:

Precision Steel pipe

      

Cold Drawn Seamless Steel Tubes

      
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