Your API 5L ISO3183 line steel pipe manufacturer in China

Longma produces and stocks API 5L/ISO3183 line pipes used for oil and gas transmissions, it includes pipes manufactured in welded (ERW, SAW). Materials covers API 5L Grade B(L245), X42(L290), X46(L320), X52(L360), X56(L390), X60(L415), X65(L450), X70(L485), X80(L555) PSL1 & PSL2 onshore, offshore and sour services.

  • Grades: API 5L Grade B, X42, X52, X56, X60, X65, X70, X80; (+N/NS, M/MS)
  • Level: PSL1, PSL2, onshore and offshore sour services
  • Outer Diameter: 4 to 72 inches.
  • Thickness: SCH 10. SCH 20, SCH 40, SCH STD, SCH 80, SCH XS, to SCH 160
  • Manufacturing Types: ERW (Electric resistance welded), SAW (Submerged Arc Welded) in LSAW, DSAW
  • Length Range: SRL, DRL, 20 FT (6 meters), 40FT (12 meters) or, customized Protection Caps in plastic or iron
  • Surface Treatment: Natural, Varnished, Black painting, FBE, 3PE (3LPE), FBE
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Our API 5L ISO3183 line steel pipes Product List

Longma produce & export API 5L ISO3183 line steel pipes with specification: 4″-72″, ERW/LSAW/DSAW type with length max 18 meters.

API 5L X52(L360) ERW Steel Pipe

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API 5L X65(L450) ERW/LSAW steel pipe

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API 5L X52 PSL1 LSAW Line pipe

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How thick is API 5L Grade B Schedule 80?

API 5L X60M PSL2 3PE LSAW pipe

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API 5L X42 ERW steel pipe

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ISO3183 L245N ERW 3LPE Steel Pipe

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API SPEC 5L LSAW steel pile pipe

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API 5L X70 PSL2 LSAW steel pipe

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API 5L B carbon steel pipe

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Longma is one of the leading API 5L line pipes manufacturer since 2003

  • Longma is one of the leading API 5L ISO3183 line pipes manufacturer since 2003.
  • Found in 2003, specialized in produce ERW, LSAW, DSAW steel pipes with an annual output of 300,000 tons.
  • Two factories, 200,000 square meters of plant.
  • Advanced production equipment imported from Germany, 16 JCO production lines.
  • More than 300 employees and more than 60 technicians provide efficient production operations and technical services.
  • API 5L(No. 5L-0685, Expiration date: 16th,Nov,2024), ISO9001, ISO14001, ISO18001, FPC certificates.
  • Exports high quality steel pipes to more than 60 countries around the world.
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API 5L ISO3183 line steel pipe Production Line

Annual output of 300,000 tons of LSAW steel pipes, with out diameter Φ406mm- 1626mm (16″ – 64″), wall thickness 6.0mm- 75mm (1/4″ – 3″), length 18 meters max.

X-Ray Testing

Ultrasonic Testing

Tack Welding

Plate Ultrasonic Testing

Pipe Forming

Pipe End Bevelling

Mechanical Expansion

Hydrostatic Pipe Testing

Our Advantages For API 5L/ISO3183 line steel pipe

Complete Specifications

Out diameter up to 1422mm, and wall thickness up to 100mm, length up to 18 meters, it can cover the needs of most projects.

Good Quality

Complete quality inspection process and inspection equipments, each steel pipe has a unique code can be traced.

Fast Delivery

Our two factory areas, 16 production lines and multi -specifications of circular production. Fastest delivery time 7 days.

Quick Quotation

Dozens of professional salesmen are responsible for customers in different regions, and can provide accurate quotes within as soon as 1 hour.

Accept Small Quantity Order

Tens of thousands of tons of steel pipe inventory can meet your minimum 1 steel pipe needs.

Complete Certificate

API 5L, ISO9001, ISO14001, ISO18001, FPC, etc. While ensuring product quality, it can help you get more orders.

Technical Data For API 5L line steel pipe

Chemical Composition for PSL 1 pipe with t ≤ 0.984”

Steel Grade Mass fraction, % based on heat and product analyses a,g
C Mn P S V Nb Ti
max b max b max max max max max
Seamless Pipe
A 0.22 0.9 0.3 0.3 – – –
B 0.28 1.2 0.3 0.3 c,d c,d d
X42 0.28 1.3 0.3 0.3 d d d
X46 0.28 1.4 0.3 0.3 d d d
X52 0.28 1.4 0.3 0.3 d d d
X56 0.28 1.4 0.3 0.3 d d d
X60 0.28 e 1.40 e 0.3 0.3 f f f
X65 0.28 e 1.40 e 0.3 0.3 f f f
X70 0.28 e 1.40 e 0.3 0.3 f f f
Welded Pipe
A 0.22 0.9 0.3 0.3 – – –
B 0.26 1.2 0.3 0.3 c,d c,d d
X42 0.26 1.3 0.3 0.3 d d d
X46 0.26 1.4 0.3 0.3 d d d
X52 0.26 1.4 0.3 0.3 d d d
X56 0.26 1.4 0.3 0.3 d d d
X60 0.26 e 1.40 e 0.3 0.3 f f f
X65 0.26 e 1.45 e 0.3 0.3 f f f
X70 0.26e 1.65 e 0.3 0.3 f f f
a. Cu ≤ = 0.50% Ni; ≤ 0.50%; Cr ≤ 0.50%; and Mo ≤ 0.15%,
b. For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for Mn is permissible, up to a maximum of 1.65% for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70.,
c. Unless otherwise agreed NB + V ≤ 0.06%,
d. Nb + V + TI ≤ 0.15%,
e. Unless otherwise agreed.,
f. Unless otherwise agreed, NB + V = Ti ≤ 0.15%,
g. No deliberate addition of B is permitted and the residual B ≤ 0.001%

 

Chemical Composition for PSL 2 pipe with t ≤ 0.984”

Steel Grade Mass fraction, % based on heat and product analyses Carbon Equiv a
C Si Mn P S V Nb Ti Other CE IIW CE Pcm
max b max max b max max max max max max max
Seamless and Welded Pipe
BR 0.24 0.4 1.2 0.025 0.015 c c 0.04 e,l 0.43 0.25
X42R 0.24 0.4 1.2 0.025 0.015 0.06 0.05 0.04 e,l 0.43 0.25
BN 0.24 0.4 1.2 0.025 0.015 c c 0.04 e,l 0.43 0.25
X42N 0.24 0.4 1.2 0.025 0.015 0.06 0.05 0.04 e,l 0.43 0.25
X46N 0.24 0.4 1.4 0.025 0.015 0.07 0.05 0.04 d,e,l 0.43 0.25
X52N 0.24 0.45 1.4 0.025 0.015 0.1 0.05 0.04 d,e,l 0.43 0.25
X56N 0.24 0.45 1.4 0.025 0.015 0.10f 0.05 0.04 d,e,l 0.43 0.25
X60N 0.24f 0.45f 1.40f 0.025 0.015 0.10f 0.05f 0.04f g,h,l As agreed
BQ 0.18 0.45 1.4 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
X42Q 0.18 0.45 1.4 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
X46Q 0.18 0.45 1.4 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
X52Q 0.18 0.45 1.5 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
X56Q 0.18 0.45f 1.5 0.025 0.015 0.07 0.05 0.04 e,l 0.43 0.25
X60Q 0.18f 0.45f 1.70f 0.025 0.015 g g g h,l 0.43 0.25
X65Q 0.18f 0.45f 1.70f 0.025 0.015 g g g h,l 0.43 0.25
X70Q 0.18f 0.45f 1.80f 0.025 0.015 g g g h,l 0.43 0.25
X80Q 0.18f 0.45f 1.90f 0.025 0.015 g g g i,j As agreed
X90Q 0.16f 0.45f 1.9 0.02 0.01 g g g j,k As agreed
X100Q 0.16f 0.45f 1.9 0.02 0.01 g g g j,k As agreed
Welded Pipe
BM 0.22 0.45 1.2 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
X42M 0.22 0.45 1.3 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
X46M 0.22 0.45 1.3 0.025 0.015 0.05 0.05 0.04 e,l 0.43 0.25
X52M 0.22 0.45 1.4 0.025 0.015 d d d e,l 0.43 0.25
X56M 0.22 0.45f 1.4 0.025 0.015 d d d e,l 0.43 0.25
X60M 0.12f 0.45f 1.60f 0.025 0.015 g g g h,l 0.43 0.25
X65M 0.12f 0.45f 1.60f 0.025 0.015 g g g h,l 0.43 0.25
X70M 0.12f 0.45f 1.70f 0.025 0.015 g g g h,l 0.43 0.25
X80M 0.12f 0.45f 1.85f 0.025 0.015 g g g i,j .043f 0.25
X90M 0.1 0.55f 2.10f 0.02 0.01 g g g i,j – 0.25
X100M 0.1 0.55f 2.10f 0.02 0.01 g g g i,j – 0.25
a. SMLS t>0.787”, CE limits shall be as agreed. The CEIIW limits applied fi C > 0.12% and the CEPcm limits apply if C ≤ 0.12%,
b. For each reduction of 0.01% below the specified maximum for C, an increase of 0.05% above the specified maximum for Mn is permissible, up to a maximum of 1.65% for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but L555 or X80.,
c. Unless otherwise agreed Nb = V ≤ 0.06%,
d. Nb = V = Ti ≤ 0.15%,
e. Unless otherwise agreed, Cu ≤ 0.50%; Ni ≤ 0.30% Cr ≤ 0.30% and Mo ≤ 0.15%,
f. Unless otherwise agreed,
g. Unless otherwise agreed, Nb + V + Ti ≤ 0.15%,
h. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 0.50% Cr ≤ 0.50% and MO ≤ 0.50%,
i. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 1.00% Cr ≤ 0.50% and MO ≤ 0.50%,
j. B ≤ 0.004%,
k. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 1.00% Cr ≤ 0.55% and MO ≤ 0.80%,
l. For all PSL 2 pipe grades except those grades with footnotes j noted, the following applies. Unless otherwise agreed no intentional addition of B is permitted and residual B ≤ 0.001%.

Letter R: As rolled
Letter N: Normalizing rolled, Normalized formed, Normalized
Letter Q: Tempered and quenched
Letter M: Thermomechanical rolled or thermomechanical formed
Letter S: Sour Services, comes with PSL2 pipe for NS, QS, and MS, eg API 5L X52MS, API 5L X65QS.

Pipe Grade Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 1 Seam of Welded Pipe
Yield Strength a Tensile Strength a Elongation Tensile Strength b
Rt0,5 PSI Min Rm PSI Min (in 2in Af % min) Rm PSI Min
A 30,500 48,600 c 48,600
B 35,500 60,200 c 60,200
X42 42,100 60,200 c 60,200
X46 46,400 63,100 c 63,100
X52 52,200 66,700 c 66,700
X56 56,600 71,100 c 71,100
X60 60,200 75,400 c 75,400
X65 65,300 77,500 c 77,500
X70 70,300 82,700 c 82,700
a. For intermediate grade, the difference between the specified minimum tensile strength and the specified minimum yield for the pipe body shall be as given for the next higher grade.
b. For the intermediate grades, the specified minimum tensile strength for the weld seam shall be the same as determined for the body using foot note a.
c. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation:
Where C is 1 940 for calculation using Si units and 625 000 for calculation using USC units
Axc   is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches) , as follows
– For circular cross-section test pieces, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) diameter test pieces.
– For full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2)
– For strip test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2)
U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch)
Pipe Grade Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 2 Seam of Welded Pipe
Yield Strength a Tensile Strength a Ratio a,c Elongation Tensile Strength d
Rt0,5 PSI Min Rm PSI Min R10,5IRm (in 2in)
Af %		 Rm (psi)
Minimum Maximum Minimum Maximum Maximum Minimum Minimum
BR, BN, BQ, BM 35,500 65,300 60,200 95,000 0.93 f 60,200
X42, X42R, X2Q, X42M 42,100 71,800 60,200 95,000 0.93 f 60,200
X46N, X46Q, X46M 46,400 76,100 63,100 95,000 0.93 f 63,100
X52N,X52Q,X52M 52,200 76,900 66,700 110,200 0.93 f 66,700
X56N,X56Q,X56M 56,600 79,000 71,100 110,200 0.93 f 71,100
X60N,X60Q,S60M 60,200 81,900 75,400 110,200 0.93 f 75,400
X65Q,X65M 65,300 87,000 77,600 110,200 0.93 f 76,600
X70Q,X65M 70,300 92,100 82,700 110,200 0.93 f 82,700
X80Q,X80M 80,.500 102,300 90,600 119,700 0.93 f 90,600
a. For intermediate grade, refer to the full API5L specification.
b. for grades > X90 refer to the full API5L specification.
c. This limit applies for pies with D> 12.750 in
d. For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using foot a.
e. for pipe requiring longitudinal testing, the maximum yield strength shall be ≤ 71,800 psi
f. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation:
Where C is 1 940 for calculation using Si units and 625 000 for calculation using USC units
Axc   is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches) , as follows
– For circular cross-section test pieces, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) diameter test pieces.
–  For full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2)
–  For strip test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2) U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch
g. Lower values fo R10,5IRm may be specified by agreement
h. for grades > x90 refer to the full API5L specification.

Outside diameter, out of roundness and wall thickness

Specified Outside Diameter D (in) Diameter Tolerance, inches d Out-of-Roundness Tolerance in
Pipe except the end a Pipe end a,b,c Pipe except the End a Pipe End a,b,c
SMLS Pipe Welded Pipe SMLS Pipe Welded Pipe
< 2.375 -0.031 to + 0.016 –  0.031 to + 0.016 0.048 0.036
≥2.375 to 6.625 0.020D for 0.015D for
+/- 0.0075D –  0.016 to + 0.063
By agreement for By agreement for
>6.625 to 24.000 +/- 0.0075D +/- 0.0075D, but max of 0.125 +/- 0.005D, but max of 0.063 0.020D 0.015D
>24 to 56 +/- 0.01D +/- 0.005D but max of 0.160 +/- 0.079 +/- 0.063 0.015D for but max of 0.060 0.01D for but max of 0.500
For For
By agreement By agreement
for for
>56 As agreed
a.        The pipe end includes a length of 4 in ate each of the pipe extremities
b.        For SMLS pipe the tolerance apply for t≤0.984in and the tolerances for the thicker pipe shall be as agreed
c.         For expanded pipe with D≥8.625in and for non-expanded pipe, the diameter tolerance and the out-of-roundness tolerance may be determined using the calculated inside diameter or measured inside diameter rather than the specified OD.
d.       For determining compliance to diameter tolerance, the pipe diameter is defined as the circumference of the pipe in any circumferential plane divide by Pi.
Wall thickness Tolerances a
t inches inches
SMLS pipe b
≤ 0.157 -1.2
>         0.157 to < 0.948 + 0.150t / – 0.125t
≥ 0.984 + 0.146 or + 0.1t, whichever is the greater
– 0.120 or – 0.1t, whichever is the greater
Welded pipe c,d
≤ 0.197 +/- 0.020
> 0.197 to < 0.591 +/- 0.1t
≥ 0.591 +/- 0.060
a.        If the purchase order specifies a minus tolerance for wall thickness smaller than the applicable value given in this table, the plus tolerance for wall thickness shall be increased by an amount sufficient to maintain the applicable tolerance range.
b.        For pipe with D≥ 14.000 in and t≥0.984in, the wall thickness tolerance locally may exceed the plus tolerance for wall thickness by an additional 0.05t provided that the plus tolerance for mass is not exceeded.
c.         The plus tolerance for wall thickens does not apply to the weld area
d.       See the full API 5L spec for full details

Hydrostatic test

Pipe to withstand a hydrostatic test without leakage through the weld seam or the pipe body. Jointers need not be hydrostatic tested provide the pipe sections used were successfully tested.

Bend test

No cracks shall occur in any portion of the test piece and no opening of the weld shall occur.

Flattening test

Acceptance criteria for flattening test shall be:

EW pipes D<12.750 in:

X60 with T 500in. There shall be no opening of the weld before the distance between the plates is less than 66% of the original outside diameter. For all grades and wall, 50%.

For pipe with a D/t > 10, there shall be no opening of the weld before the distance between the plates is less than 30% of the original outside diameter.

For other sizes refer to the full API 5L specification.

CVN impact test for PSL2

Many PSL2 pipe sizes and grades require CVN. Seamless pipe is to be tested in the body. Welded pipe is to be tested in the body, pipe weld and heat-affected zone. Refer to the full API 5L specification for the chart of sizes and grades and required absorbed energy values.

  • API 5L line pipe is preferred in long pipelines due to its inexpensiveness, so it is widely used in gas, water and oil transportation.
  • API 5L line pipe can resist to crack propagation, so it used to pipeline steel.
  • Line Pipe and Sour Service Line Pipes
FAQs

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