American standards:

ASTM A249: Standard specification for welded austenitic steel boiler,superheater, heat-exchanger and condenser tubes.

ASTM A269:Standard specification for welded austenitic stainless steel tubing for general service

ASTM A688:Standard specification for welded austenitic stainless steel feedwater heater tubes.

ASTM A554:Standard specification for welded stainless steel mechanical tubing.

ASTM A268:Specification for seamless and welded Ferritic/Martensitic stainless steel tubing for General Service

ASTM A789:Specification for seamless and welded Ferritic/Austenitic stainless steel tubing for General Service

ASTM A312:Seamless/Welded austenitic stainless steel pipe

European Standard:

EN 10217-7:Welded Steel Tubes for pressure purposes-Part 7 Stainless steel tubes

Germanic standards:

DIN17455:General purpose welded circular stainless steel tubes

DIN17457: Welded circular austenitic stainless steel tubes subject to special requirements; technical delivery conditions

Grade

Chemical Composition(%)

Remark

C≤

Mn≤

P≤

S≤

Si≤

Cr

Ni

Mo

N

Cu

201

0.15

5.5~7.5

0.06

0.03

1.00

16.0~18.0

3.5~5.5

0.25

201

0.15

7.5~10.0

0.06

0.03

1.00

17.0~19.0

4.0~6.0

304

0.08

2.00

0.045

0.030

0.75

18.0~20.0

8.0~10.50

0~0.1

304L

0.030

2.00

0.045

0.030

0.75

18.0~20.0

8.0~12.0

0~0.1

310S

0.08

2.00

0.045

0.030

1.50

24.0~26.0

19.0~22.0

321

0.08

2.00

0.045

0.030

0.75

17.0~19.0

9.0~12.0

0~0.1

Ti≥5×(C+N),≤0.70

316

0.08

2.00

0.045

0.030

0.75

16.0~18.0

10.0~14.0

2.0~3.0

0~0.1

316L

0.030

2.00

0.045

0.030

0.75

16.0~18.0

10.0~14.0

2.0~3.0

0~0.1

317

0.08

2.00

0.045

0.030

0.75

18.0~20.0

11.0~15.0

3.0~4.0

0~0.1

317L

0.030

2.00

0.045

0.030

0.75

18.0~20.0

11.0~15.0

3.0~4.0

0~0.1

Corrosion Test

Conducted only when specially requested by the client

Chemical Analysis

Test done as per required quality standards

Destructive / Mechanical Testing

Tensile | Hardness | Flattening | Flare | Flange

Reverse-bend and Re. flat tests

Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end

Eddy Current Testing

Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System

Hydrostatic Testing

100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s .

Air Under Pressure Test

To check any evidence of air leakage

Visual Inspection

After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections

1.ISO System

2.Manufacture License of Pressure Tube

3.Production experience about 20 years.

4.Raw Material are from POSCO,BAO STEEL,TISCO,CRUPP ETC

5.Market -More than 30 countries worldwide.

6.We have the most convenient transport from shanghai and timely delivery.

7.We offer competitive prices based on good quality.

8.We have high technical production line with top quality products.

9.We have win high reputation based on good quality.