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.
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.
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.
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.
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Chemical Requirements for ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe |
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Pipe |
Grade |
Composition, % |
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C max |
Mn |
P max |
S max |
Si |
Others |
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<=1in (25mm) |
>1~2in (25~50mm) |
>2~4in(50-100mm) |
>4~8in (100~200mm) |
>8in (200mm) |
<=1/2in (12.5mm) |
>1/2in (12.5mm) |
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60 |
0.24 |
0.21 |
0.29 |
0.31 |
0.31 |
0.98max |
0.035 |
0.035 |
0.13–0.45 |
... |
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|
65 |
0.28 |
0.31 |
0.33 |
0.33 |
0.33 |
0.98max |
0.035 |
0.035 |
0.13–0.45 |
... |
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|
70 |
0.31 |
0.33 |
0.35 |
0.35 |
0.35 |
1.30max |
0.035 |
0.035 |
0.13–0.45 |
... |
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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 |
... |
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|
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 |
... |
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Mechanical Properties |
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Grade |
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B60 |
B65 |
B70 |
C55 |
C60 |
C65 |
C70 |
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Tensile strength, min: |
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ksi |
60 |
65 |
70 |
55 |
60 |
65 |
70 |
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Mpa |
415 |
450 |
485 |
380 |
415 |
450 |
485 |
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Yield strength, min: |
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|
ksi |
32 |
35 |
38 |
30 |
32 |
35 |
38 |
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MPa |
220 |
240 |
260 |
205 |
220 |
240 |
260 |
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Elongation Requirements: As per standard |
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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.
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.
The finished pipe shall be free of injurious defects and shall have workmanlike finish.
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.
● 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.
