API 5l X70 Pipe

API 5L X70 Pipe is a high-strength carbon steel pipe used mainly in oil and gas transmission. It meets particular chemical and mechanical requirements, to guarantee performance and safety. The pipe comes in both seamless and welded versions and it is available in two specification levels: PSL1 and PSL2.  It is ideal for high-pressure environment because of its minimum yield strength of 485 MPa, and tensile strength of 570 MPa. These pipes are built to resist corrosion and carry fluids over long distances with reliability. API 5L X70 pipe specifications cover a range of wall thicknesses and diameters, from small sizes up to 48 inches.

Api 5l X70 Pipe

Multi Metals India is a trusted supplier of API 5L X70 Pipe, offering products in Q, M, QS, and MS grades. Our pipes are made with precise blends of elements like carbon, manganese, silicon, and trace alloys for strength and durability. They’re ideal for pipeline construction, power plants, refineries, and offshore platforms. The low carbon content in seamless variants makes them easy to weld without fillers. Whether for water, oil, or natural gas, these pipes serve various industrial needs. Contact us to learn more about available stock, pricing, and technical details tailored to your project.

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Application of API 5l X70 Pipe

● Oil & Gas Transportation
● Petrochemical Industry
● Water Supply
● Construction

Specification Table of API 5l X70 Pipe

Property Details
Standard API 5L, PSL-1, PSL-2
Size 1/2″ to 24″, *size above 24″ NPS can be arranged on request
Schedule SCH10, SCH 40, SCH 80, SCH 160 to SCH XXS
(as per thickness mentioned in API 5L)
Type Seamless, Welded, ERW, L-SAW construction
Grade Grade X70

Delivery Condition

PSL Delivery Condition Pipe grade
PSL1 As-rolled, normalized, normalizing formed A
As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized and tempered or if agreed Q&T SMLS only B
As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized and tempered X42, X46, X52, X56, X60, X65, X70
PSL 2 As-rolled BR, X42R
Normalizing rolled, normalizing formed, normalized or normalized and tempered BN, X42N, X46N, X52N, X56N, X60N
Quenched and tempered BQ, X42Q, X46Q, X56Q, X60Q, X65Q, X70Q, X80Q, X90Q, X100Q
Thermomechanical rolled or thermomechanical formed BM, X42M, X46M, X56M, X60M, X65M, X70M, X80M
Thermomechanical rolled X90M, X100M, X120M
The suffice (R, N, Q or M) for PSL2 grades, belongs to the steel grade

Process of Manufacturing

Type of Pipe PSL 1 PSL 2
Grade A Grade B X42 to X70 B to X80 X80 to X100
SMLS ✔ ✔ ✔ ✔ ✔
LFW ✔ ✔ ✔
HFW ✔ ✔ ✔ ✔
LW ✔
SAWL ✔ ✔ ✔ ✔ ✔
SAWH ✔ ✔ ✔ ✔ ✔
Legend:
SMLS – Seamless, without weld
LFW – Low frequency welded pipe, <70 kHz
HFW – High frequency welded pipe, >70 kHz
SAWL – Submerge-arc welding longitudinal welded
SAWH – Submerge-arc welding helical welded

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
X70 0.28 e 1.40 e 0.03 0.03 f f f
Welded Pipe
X70 0.26 e 1.65 e 0.03 0.03 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
X70Q 0.18f 0.45f 1.80f 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
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 < L485 or X70; up to a maximum of 2.00% for grades ≥ L485 or X70, but ≤ L555 or X80; and up to a maximum of 2.20% for grades > 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%.

Mechanical properties

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
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)

Tensile and Yield – PSL1 and PSL2

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) Rm (psi)
Af %
Minimum Maximum Minimum Maximum Maximum Minimum Minimum
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.

Tolerances 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 D/t≤75 D/t≤75
By agreement for By agreement for
D/t≤75 D/t≤75
>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
D/t≤75 D/t≤75
By agreement By agreement
for for
D/t≤75 D/t≤75
>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 API5L spec for full details