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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

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

Product Details:

Place of Origin: China
Brand Name: Torich
Certification: ISO 9001 TS16949 ISO14001
Model Number: GB13296 -1991

Payment & Shipping Terms:

Minimum Order Quantity: 1ton
Price: 2000-3000USD
Packaging Details: In wooden boxes packaging
Delivery Time: 30-60days
Payment Terms: L/C, T/T
Supply Ability: 50000tons per year
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Detailed Product Description
Standard: GB13296-91 Application: Boiler And Exchanger

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 Method Size(mm) Tolerance
Hot Rolling(Extrusion) OD ≤140 ±1.25%
>140 ±1.0%
WT ≤10 ±12.5%
>10 ±15%
Cold Drawn(Cold Rolled) OD 8~30 ±0.20mm
>30~50 ±0.30mm
>50 ±0.8%
WT 1.0~3

+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

%

0Cr18Ni9 520 205 35
1Cr19Ni9 520 205 35
0Cr19Ni10 480 175 35
1Cr18Ni9Ti 550 205 40
0Cr18Ni12Mo2Ti 530 205 35
0Cr26Ni5Mo2 590 390 18
1Cr17 410 245 20
00Cr27Mo 410 245 20
1Cr25Ti 440 245 17

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

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

Contact Details
Torich International Co.,Ltd

Contact Person: Mr. Richard

Tel: 86-574-88086983

Fax: 86-574-88086983

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