The process of manufacturing Longitudinal Submerged-arc Welded(LSAW) Pipe is as follows:
Ultrasonic plate probing → edge milling → pre-bending → forming → Pre-welding → Internal welding→ External welding → Ultrasonic inspection → X-ray inspection → Expanding → hydraulic test →l. Chamfering → Ultrasonic inspection → X-ray inspection → magnetic particle inspection at tube end
Manufacture: LSAW(JCOE) Steel pipes
Size : O.D.: 406~1500mm W.T.: 6~40mm
Grade: CB60,CB65, CC60,CC65,etc.
Length: 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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|
CB |
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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|
CC |
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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|
|
CB65 |
CB70 |
CC60 |
CC65 |
CC70 |
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Tensile strength, min: |
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|
ksi |
65 |
70 |
60 |
65 |
70 |
|
Mpa |
450 |
485 |
415 |
450 |
485 |
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Yield strength, min: |
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|
ksi |
35 |
38 |
32 |
35 |
38 |
|
MPa |
240 |
260 |
220 |
240 |
260 |
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.
Manufacturer's name or mark
Specification number(year-date or required)
Size( OD, W.T, length)
Grade( A or B)
Type of pipe( F, E, or S)
Test pressure( seamless steel pipe only)
Heat Number
Any additional information specified in the purchase order.
Quantity ( feet, meters, or number of lengths)
Name of material( steel pipe, electric fusion welded)
Specification number
Grade and class designations
Size (outside or inside diameter, normal or minimum wall thickness)
Length (specific or random)
End finish
Purchase options
Supplementary requirements, if any.
ASTM A252 GR.3 Structural LSAW(JCOE) Carbon Steel Pipe
BS EN10210 S275J0H LSAW(JCOE) Steel Pipe
ASTM A671/A671M LSAW Steel Pipe
ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe
API 5L X65 PSL1/PSL 2 LSAW Carbon Steel Pipe / API 5L Grade X70 LSAW Steel Pipe
EN10219 S355J0H Structural LSAW(JCOE) Steel Pipe
