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API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe for Mechanical Processing

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. We can provide the seamless steel pipes with heavy wall thickness according to this standard requirements.

Application of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe for Mechanical Processing:

API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe can be used for conveying air steam, sewage, gas and water. It can also be used for mechanical processing, engineering purpose.

Manufacturing Process of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe for Mechanical Processing:

API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe are made either by cold-drawn or hot rolled, as required by the customers.

Details of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe for Mechanical Processing:

Manufacture: Seamless process, cold drawn or hot rolled

Size: O.D.: 20~500mm W.T.: 3~80mm

Length: 6M or specified length as required.

Ends: Plain End, Beveled End, Threaded

Chemical Composition of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe:

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

StandardGrade Chemical composition (%)
C Mn PS
API 5LB≤0.28≤1.20≤0.030≤0.030


Chemical Composition of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe:

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

Standardstrong>GradeChemical composition (%)
C Mn PS
API 5LB≤0.24≤1.20≤0.025≤0.015


Mechanical Properties of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe:

Mechanical Properties of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe(PSL1):

Yield Strength (MPa) Tensile Strength (MPa) Elongation A%
psiMPapsiMPaElongation (Min )
35,00024160,00041421~27


Mechanical Properties of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe(PSL2):

Yield Strength (MPa) Tensile Strength (MPa) Elongation A%Impact (J)
psiMPapsiMPaElongation (Min )Min
24144841475821~2741(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)


In 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 PipeTblerancr1 (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 API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe

Pipe body NDT—Pipes shall be full-body ultrasonically tested for defection of longitudinal imperfection, laminar imperfection inspection and thickness measurement.
Pipe end NDT—Manual UT on the blind zone at both ends of each pipe shall be inspected.
Tension test Test—According to ISO 6892 or ASTM A370.

Impact test: according to API SPEC 5L.
Hydro-static Test—Each tube shall be subjected to the hydro-static pressure test.

Appearance for API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe

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 API 5L GR.B Heavy Wall Thickness Seamless 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 A53 Gr.A & Gr.b Black Seamless Steel Pipe:

a. Bare pipe or Black / Varnish 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.