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SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2

API Spec 5L specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless pipe and welded steel pipes.

PRODUCT DESCRIPTION

Standard: API Spec 5L

API Spec 5L specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless pipe and welded steel pipes. This standard covers the steel pipes made from different manufacturing process like seamless steel pipe, Electric Resistance Welded (ERW) steel pipe, Longitudinal Seam Submerged Arc Welding (LSAW) pipe and Spiral Submerged-Arc welding (SSAW) pipes.

Application of SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:

SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2 is mainly used in water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction.

SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2 can be used in liquid transportation: water supply and drainage. Gas transportation: gas, steam, liquefied petroleum gas. Structural use: for piling pipes, for bridges; for piers, roads, building structures, etc.

Manufacturing Process of SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:

SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2 is made of hot rolled steel coils, which is extruded under normal atmospheric temperature and welded by a double wire double sided submerged arc welding process.

Details of SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:

Manufacture: Electric Resistance Welding

Size: O.D.: 219~3500mm W.T.: 5~30mm

Length: 6M or specified length as required.

Ends: Plain End, Beveled End, Grooved

Chemical Composition of SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:

Grade and Chemical Composition (%) For API 5L PSL1

StandardGrade Chemical composition(%)
C Mn PS
API 5LX52≤0.26≤1.40≤0.030≤0.030


Chemical Composition of SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:


Grade and Chemical Composition (%) For API 5L PSL2

StandardGrade Chemical composition (%)
C Mn PS
API 5LX52≤0.22≤1.40≤0.025≤0.015


Mechanical Properties of SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:


Mechanical Properties of API 5L GR.B X52(PSL1):

GraYield Strength (MPa) Tensile Strength (MPa) Elongation A%

psiMPapsiMPaElongation (Min )
X5252,00035966,00045520~24


Mechanical Properties of SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2 (PSL2):

GradeYield Strength (MPa) Tensile Strength (MPa) Elongation A%Impact (J)

psiMPapsiMPaElongation (Min )Min
X5252,00035977,00053120~2441(27)


Permissible Variations in Weight and Dimensions


Tolerance for Diameters of Pipe Body

SizeTolerance (with respect to specified outside diameter)
<2 3/8+ 0.016 in., - 0.031 in. (+ 0.41 mm, - 0.79 mm)
> 2 3/8 and ≤4 1/2, continuous welded±1.00%
> 2 3/8 and < 20±0.75%
> 20. seamless± 1.00%
>20 and <36, welded+ 0.75%.-0.25%
> 36、welded+ 1/4 in.. - 1/8 in. (+ 6.35 mm, -3.20 mm)


ln the case of pipe hydro-statically tested to pressures in excess of standard test pressures, other tolerances may be agreed upon between the manufacturer and the purchaser.


Tolerance for Diameter at Pipe Ends

SizeMinus TolerancePlus ToleranceEnd-to-End ToleranceOut-of-Roundness
Diameter,Axis Tolerance (Percent of Specified OD)Maximum Differential Between Minimum and Maximum Diameters (Applies Only to Pipe With D/t≤75)
≤10 3/4 l&V41/64(0.40mm)1/16(1.59mm) mm)
>10 3/4 and ≤201/32 (0.79 mm)3/32 (2.38 mm)
> 20 and≤ 421/32 (0.79 mm)3/32(2.38 mm)b± 1%<0.500 in. (12,7 mm)
>421/32 (0.79 mm)3/32 (2.38 mm)b± 1%£ Q625 in. (15.9 mm)


Out-of-roundness tolerances apply to maximum and minimum diameters as measured with a bar gauge, caliper, or device measuring actual maximum and minimum diameters.

The average diameter (as measured with a diameter tape) of one end of pipe shall not differ by more than 3/32 in. (2.38 mm) from that of the other end.


Tolerances for Wall Thickness

SizeType of PipeTolerance1 (Percent of Specified Wall Thickness}
Grade B or LowerGrade X42 or Higher
<2 7/8All+20.- 12.5+ 15.0.-12.5
>2 7/8and<20All+ 15,0,-12.5+ 15-I2.5
>20Welded+ 17.5.-12.5+ 19.5.-8.0
>20Seamless+ 15.0.-12.5+ 17.5.-10,0


Where negative tolerances smaller than those listed are specified by the purchaser, the positive tolerance shall be increased to the applicable total tolerance range in percent less the wall thickness negative tolerance.


Tolerance for Weight

QuantityTolerance(percent)
Single lengths, special plain-end pipe or A25 pipeSingle lengths, other pipeCarloads.GradeA25,40,000lb(18 144kg)or moreCarloads, other than Grade A25,40.0001b (18 144 kg) or moreCarloads, all grades less than 40000 lb (18 144 kg)Order items. Grade A25. 40.000 lb (18 144 kg) or moreOrder items, other than Grade A25,40,000 lb (18 144 kg) or moreOrder items, all grades, less than 40.000 lb (18 144 kg)+ 10.-5.0+ 10,- 35-2.5-1.75-15-3.5-1.75 -3.5


Notes:

1.Weight tolerances apply to the calculated weights for threaded-and-coupled pipe and to the tabulated or calculated weights for plain-end pipe. Where negative wall thickness tolerances smaller than those listed in above table are specified by the purchaser, the plus weight tolerance for single lengths shall be increased to 22.5 percent less the wail thickness negative tolerance.

2.For carloads composed of pipe from more than one order item, the carload tolerances are to be applied on an individual order item basis.

3. The tolerance for order items apply to the overall quantity of pipe shipped for the order item.

Mechanical Tests for SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:

Tensile testing of the pipe body—The tensile test should be carried out in accordance with ISO6892 or ASTM A370.Longitudinal samples should be used.Twice per test unit of pipe with the same cold-expansion ratio a.b.d.

CVN impact test—The Charpy test should be carried out in accordance with ASTM A370. Twice per test unit of not more than 100 lengths of pipe with the same cold-expansion ratio a.b.d.

Hardness Test—When suspected hard spots are detected by visual inspection, hardness tests shall be carried out in accordance with ISO 6506, ISO 6507, ISO 6508 or ASTM A 370 using portable hardness test equipment and methods complying with ASTM A 956, ASTM A 1038 or ASTM E 110 respectively depending on the method Used.

Hydro-static Test—Each tube shall be subjected to the hydro-static pressure test

Bending Test— a sufficient length of pipe shall stand being bent cold through 90° around a cylindrical mandrel.

100% X-ray test for the weld seam

The ultrasonic testing

Appearance for SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:

A sufficient number of visual surface imperfections to provide seasonable assurance is necessarily. The defect shall be removed or cut off within the limits of requirements on length . The finished pipe shall be reasonably straight.

Marking for SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:

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 SSAW Spiral Welded Steel Pipe API 5L X52 PSL1/PSL2:

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

b. 6”and below in bundles with two cotton slings;

c. Both ends with end protectors;

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

e. Marking.