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ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe

Short Description:

ASTM A672/A672M covers steel pipe: electric-fusion-welded with filter metal added, fabricated from pressure-vessel quality plate of any of several analyses and strength levels and suitable for high-pressure service at moderate temperatures. The standard normally covers pipe 16 in. (400mm) in outside diameter or larger with wall thickness up to 3in. (75mm), inclusive pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.

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Application of ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe:

ASTM A672 B60/B70/C60/C65/C70 LSAW(JCOE) Carbon Steel Pipe is used in high-pressure condition and mainly used in power plant,offshore oil industry, chemical industry, Fertilizer, petrochemicals, refineries etc.

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ASTM A6723
ASTM A6722
ASTM A6721

Manufacturing Process of ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe:

ASTM A672 B60/B70/C60/C65/C70 LSAW(JCOE) Carbon Steel Pipe shall be double-welded, full-penetration welds made in accordance with procedures and by welders or welding operators qualified in accordance with the ASME Boiler and pressure Vessel Code, Section IX.

Heat Treatment of ASTM A672 B60/B70/C60/C65/C70 LSAW(JCOE) Carbon Steel Pipe:

All classes other than 10, 11, 12 and 13 shall be heat treated in furnace controlled to ±15℃ and equipped with a recording hydrometer so that heating records are available.

Details of ASTM A672 B60/B70/C60/C65/C70 LSAW(JCOE) Carbon Steel Pipe:

Manufacture: Longitudinally Submerged Arc Welding(LSAW).

Size: O.D.: 406~1422mm  W.T.: 8~60mm.

Grade: B60, C60, C65, etc.

Length: 3-12M or specified length as required.

Ends: Plain End, Beveled End, Grooved.

Chemical Composition of ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe:

Chemical Requirements for ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe

Pipe

Grade

Composition, %

C

                 max

Mn

 

P

  max

S

 max

Si

Others

   

<=1in

(25mm)

>1~2in

(25~50mm)

>2~4in(50-100mm)

>4~8in

(100~200mm)

>8in

(200mm)

<=1/2in

(12.5mm)

>1/2in

(12.5mm)

       
 

60

0.24 

0.21 

0.29 

0.31 

0.31 

0.98max

0.035

0.035

0.13–0.45

...

65

0.28 

0.31 

0.33 

0.33 

0.33 

0.98max

0.035

0.035

0.13–0.45

...

70

0.31 

0.33 

0.35 

0.35 

0.35 

1.30max

0.035

0.035

0.13–0.45

...

C

55

0.18 

0.20 

0.22 

0.24 

0.26 

0.55–0.98

0.55–1.30

0.035

0.035

0.13–0.45

...

60

0.21 

0.23 

0.25 

0.27 

0.27 

0.55–0.98

0.79–1.30

0.035

0.035

0.13–0.45

...

65

0.24 

0.26 

0.28 

0.29 

0.29 

0.79–1.30

0.79–1.30

0.035

0.035

0.13–0.45

...

70

0.27 

0.28 

0.30 

0.31 

0.31 

0.79–1.30

0.79–1.30

0.035

0.035

0.13–0.45

...

Mechanical Properties of ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe:

Mechanical Properties

Grade

 

B60

B65

B70

C55

C60

C65

C70

Tensile strength, min:

ksi

60

65

70

55

60

65

70

Mpa

415

450

485

380

415

450

485

Yield strength, min:

ksi

32

35

38

30

32

35

38

MPa

220

240

260

205

220

240

260

Elongation Requirements: As per standard

Permissible Variations in Weight and Dimensions:

1. Outside Diameter-Based on circumferential measurement ±0.5% of the specified outside diameter.

2. Out-of-Roundness-Difference between major and minor outside diameters.

3. Alignment-Using a 10 ft (3m) straightedge placed so that both ends are in contact with the pipe, 1/8 in. (3mm).

4. Thickness-The minimum wall thickness at any point in the pipe shall not be more than 0.01 in. (0.3mm) under the specified nominal thickness.

5. Lengths with unmachined ends shall be within -0,+1/2 in. (-0,+13mm) of that specified. Lengths with machined ends shall be as agreed upon between the manufacturer and the purchaser.

Mechanical Tests for ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe:

Tension Test—Transverse tensile properties of the welded joint shall meet the minimum requirements for ultimate tensile strength of the specified plate material.

Transverse-guided-weld-bent tests —The bend test shall be acceptable if no cracks or other defects exceeding 1/8 in. (3mm) in any direction are present in the weld metal or between the weld and the base metal after bending.

Radio-graphic Examination-The full length of each weld of class X1 and X2 shall be radiographically examined in accordance with and meet the requirements of the ASME Boiler and Pressure Vessel Code, Section seven, paragraph UW-51. 

Appearance for ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe:

The finished pipe shall be free of injurious defects and shall have workmanlike finish.

Marking for ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe:

A. Manufacturer’s name or mark.
B. Specification number(year-date or required).
C. Size( OD, W.T, length).
D. Grade( A or B).
E. Type of pipe( F, E, or S).
F. Test pressure( seamless steel pipe only).
G. Heat Number.
H. Any additional information specified in the purchase order.

Packing for ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe:

● Bare pipe or Black / Varnish coating/Epoxy coating/3PE coating ( according to customer’s requirements);

● 6"and below in bundles with two cotton slings;

● Both ends with end protectors;

● Plain end, bevel end(2"and above with bevel ends, degree: 30~35°), threaded and coupling;

● Marking.


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