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  • ASTM A671/A671M LSAW Steel Pipe

ASTM A671/A671M LSAW Steel Pipe

This specification covers electric-fusion-welded steel pipe with filler metal added, fabricated from pressure vessel quality plate of several analyses and strength levels and suitalbe for high-pressure service at atmospheric and lower temperatures.

PRODUCT DESCRIPTION

Standard: ASTM A671/A671M

This specification covers electric-fusion-welded steel pipe with filler metal added, fabricated from pressure vessel quality plate of several analyses and strength levels and suitalbe for high-pressure service at atmospheric and lower temperatures.

Application of ASTM A671/A671M LSAW Steel Pipe:

Pipe ordered under this specification is used for high-pressure service at atmospheric and lower temperatures. Mainly used for oil and natural gas transmission.

Manufacturing Process:

ASTM A671 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 A671 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 A671 LSAW(JCOE) Carbon Steel Pipe:

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;

Chemical Composition of ASTM A671 LSAW Carbon Steel Pipe:

Chemical Requirements for ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe
PipeGradeComposition, %
C maxMn
P maxS maxSiOthers


<=1in(25mm)>1~2in(25~50mm)>2~4in(50-100mm)>4~8in(100~200mm)>8in(200mm)<=1/2in(12.5mm)>1/2in(12.5mm)



CB600.240.210.290.310.310.98max0.0350.0350.13–0.45...
650.280.310.330.330.330.98max0.0350.0350.13–0.45...
700.310.330.350.350.351.30max0.0350.0350.13–0.45...
CC600.210.230.250.270.270.55–0.980.79–1.300.0350.0350.13–0.45...
650.240.260.280.290.290.79–1.300.79–1.300.0350.0350.13–0.45...
700.270.280.300.310.310.79–1.300.79–1.300.0350.0350.13–0.45...













Mechanical Properties of ASTM A671 LSAW Carbon Steel Pipe:

Mechanical Properties
Grade

CB65CB70CC60CC65CC70
Tensile strength, min:
ksi6570606570
Mpa450485415450485
Yield strength, min:
ksi3538323538
MPa240260220240260


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 A671 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 A671 LSAW Carbon Steel Pipe:

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

Marking for ASTM A671 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.

i.Ordering information:

a.Quantity ( feet, meters, or number of lengths)

b.Name of material(steel pipe, electric fusion welded)

c.Specification number

d.Grade and class designations

e.Size (outside or inside diameter, normal or minimum wall thickness)

f.Length (specific or random)

g.End finish

h.Purchase options

i.Supplementary requirements, if any.

Packing for ASTM A671 LSAW Carbon Steel Pipe:

a.Bare pipe or Black / Varnish coating/Epoxy coating/3PE coating (according to customer's requirements);

b.In loose;

c.Both ends with end protectors;

d.Plain end, bevel end(2" and above with bevel ends, degree: 30~35°), customized;

e.Marking.