We have a large scale unit engaged in stocking and
exporting carbon steel tubes, carbon steel pipes and carbon steel welded
pipes, carbon steel welded tubes and electrogalvanized steel tubes/pipes. we
supply for engineering purpose, ERW pipes for water, gas & sewerage,
carbon steel tubes for idlers of belt conveyors, water wells and lancing
pipes for various automotive & industrial applications
Carbon Steel Pipes & Tubes
Applications
Carbon Steel is used in the most critical engineering applications and also
in certain applications in the automotive sector. In addition, some of the
value-added Carbon Steel products include steel for LPG cylinders, API
grade, corrosion resistant steel, critical structural application steel,
boiler quality, auto grades, precision tubes and medium/high carbon grades,
among others.
Carbon Products
A53 A106 API5L Grade B/C X42 Seamless Pipe Size Range : 1/8" - 26" Schedules : 20, 30, 40, Standard (STD), Extra Heavy (XH), 80, 100,
120, 140, 160, XXH Grades : ASTM A53 Gr B, ASME SA53 Gr B, API-5L Gr B, ASTM A106 Gr B,
ASME SA106 Gr B, ASTM A106 Gr C, PSL 1 and PSL2
API5L X-42 X-52 X-60 Seamless Pipe Size Range : 2" - 24" Schedules : Standard (STD), Extra Heavy (XH), 100, 120, 160, XXH Grades : PSL1 and PSL2
A333 (Low Temp) Grade 1/6 Carbon Steel Seamless Pipe Size Range : 1/2" - 24" Schedules : Standard (STD), Extra Heavy (XH), 100, 120, 160, XXH
A53 API5L Grade B X-42 X-52 X-60 ERW (Electric Resistance Welded) Pipe Size Ranges : 2" - 24" Schedules : 10, 20, Standard (STD), Extra Heavy (XH) Non-Schedules : .120wall, .156wall, .188wall, .203 wall, .219wall
etc. Grades : API-5L Gr B, API-5L Gr X42, API-5L Gr X52, API-5L Gr X60,
API-5L Gr X65PSL1 and PSL2
API5L Grade B X-42 X-52 X-60 DSAW/SAW Size Ranges : 26" - 60" Schedules : 20, Std, XH, 30, Grades : API-5L Gr B, API-5L Gr X42, API-5L Gr X52, API-5L Gr X60,
API-5L Gr X65PSL1 and PSL2
A For each reduction of
0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06%
would be permitted to a maximum of 1.35% manganese.
TENSILE
REQUIREMENTS
ELONGATION
psi
Mpa
L
T
Y.S,min
35 000
240
22
12
T.S,min
60 000
415
Stress Relieving
of Test Pieces
Metal Temperature
°F
°C
5
600
1050
565
1000
540
ASTM A106 Grade B & GRADE C
CHEMICAL
REQUIREMENTS
ELEMENT
COMPOSITION, %
ASTM A106 Gr.B
ASTM A106 Gr.C
C maxA
0.30
0.35
Mn
0.29-1.06
0.29-1.06
P, max
0.04
0.04
S, max
0.04
0.04
Si, min
0.10
0.10
Cr, maxB
0.40
0.40
Cu, maxB
0.40
0.40
Mo, maxB
0.15
0.15
Ni, maxB
0.40
0.40
V, maxB
0.08
0.08
A) For each reduction of 0.01% below
the specified carbon maximum, an increase of 0.06% manganese above
the specified maximum will be permitted up to a maximum of 1.35%.
B) These five elements combined shall not exceed 1%.
Tensile
Requirements
ASTM A106 Gr.B
ASTM A106 Gr.C
Y.S, min, psi[Mpa]
35 000 [240]
40 000 [275]
T.S., min, psi[Mpa]
60 000 [415]
70 000 [485]
ELONGATION
ASTM A106 Gr.B
ASTM A106 Gr.C
L
T
L
T
22
12
20
12
PSL1
API 5L 245 OR GR.B
CHEMICAL
COMPOSITION
Mass fraction, based
upon heat and product analysis a
SEAMLESS PIPE
C
Mn
P
S
V
Nb
Ti
maxb
max.b
min.
max.
max.
max.
max.
max.
0.28
1.20
-
0.030
0.030
c,d
c,d
d
WELDED PIPE
0.26
1.20
-
0.030
0.030
c,d
c,d
d
a
0.50% maximum for copper, 0.50%
maximum for nickel, 0.50% maximum for chromium, and
0.15% maximum for molybdenum. For grades up to and including
L360/X52, Cu,
Cr and Ni shall not be added intentionally.
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 manganese 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, the sum of
the niobium and vanadium contents shall be = 0.06%.
d
The sum of the niobium ,vanadium and
titanium concentrations shall be = 0.15%.
MECHANICAL
REQUIREMENTS
Weld seam of EW, SAW and
COW pipes
Y.Sa
T.Sa
ELONGATION
Tensile Strengthb
Mpa(psi)
Mpa(psi)
Mpa(psi)
min
min
min
min
245(35 500)
415(60 200)
28%
415 (60 200)
a
For intermediate grades, the
differencec between the specified minimum tensile strength and the
specified minimum yield strength for the pipe body shall be as given
in the table for the next higher grade.
b
For Intermediate grades, the
specified minimum tensile strength for the weld seam shall be the
same value as was determines for the pipe body using footnote a)
API 5L 290 OR X 42
CHEMICAL
COMPOSITION
Mass fraction, based
upon heat and product analysis a
SEAMLESS PIPE
C
Mn
P
S
V
Nb
Ti
maxb
max.b
min.
max.
max.
max.
max.
max.
0.28
1.30
-
0.030
0.030
d
d
d
WELDED PIPE
0.26
1.30
-
0.030
0.030
d
d
d
a
0.50% maximum for copper, 0.50%
maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum
for molybdenum. For grades up to and including L360/X52, Cu, Cr and
Ni shall not be added intentionally.
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 manganese 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.
d
The sum of the niobium ,vanadium and
titanium concentrations shall be = 0.15%.
MECHANICAL
REQUIREMENTS
Weld seam of EW, SAW and
COW pipes
Y.Sa
T.Sa
ELONGATION
Tensile Strengthb
Mpa(psi)
Mpa(psi)
Mpa(psi)
min
min
min
min
290(42 100)
415(60 200)
c
415 (60 200)
a
For intermediate grades, the
difference between the specified minimum tensile strength and the
specified minimum yield strength for the pipe body shall be as given
in the table for the next higher grade.
b
For Intermediate grades, the
specified minimum tensile strength for the weld seam shall be the
same value as was determines for the pipe body using footnote a)
c
The specified minimum elongation, Af,
expressed in percent and rounded to the nearest percent, shall be as
determined using the following equation:
API 5L 390 OR X 56
CHEMICAL
COMPOSITION
Mass fraction, based
upon heat and product analysis a
SEAMLESS PIPE
C
Mn
P
S
V
Nb
Ti
maxb
max.b
min.
max.
max.
max.
max.
max.
0.28
1.40
-
0.030
0.030
d
d
d
WELDED PIPE
0.26
1.40
-
0.030
0.030
d
d
d
a
0.50% maximum for copper, 0.50%
maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum
for molybdenum. For grades up to and including L360/X52, Cu, Cr and
Ni shall not be added intentionally.
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 manganese 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.
d
The sum of the niobium ,vanadium and
titanium concentrations shall be = 0.15%.
MECHANICAL
REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa
T.Sa
ELONGATION
Tensile Strengthb
Mpa(psi)
Mpa(psi)
Mpa(psi)
min
min
min
min
390(56 600)
490(71 100)
c
490 (71 100)
a
For intermediate grades, the
differencec between the specified minimum tensile strength and the
specified minimum yield strength for the pipe body shall be as given
in the table for the next higher grade.
b
For Intermediate grades, the
specified minimum tensile strength for the weld seam shall be the
same value as was determines for the pipe body using footnote a)
c
The specified minimum elongation, Af,
expressed in percent and rounded to the nearest percent, shall be as
determined using the following equation:
API 5L 415 OR X60
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis a
SEAMLESS PIPE
C
Mn
P
S
V
Nb
Ti
maxb
max.b
min.
max.
max.
max.
max.
max.
0.28e
1.40e
-
0.030
0.030
f
f
f
WELDED PIPE
0.26e
1.40e
-
0.030
0.030
f
f
f
a
0.50% maximum for copper, 0.50%
maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum
for molybdenum. For grades up to and including L360/X52, Cu, Cr and
Ni shall not be added intentionally.
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 manganese 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.
e
Unless otherwise agreed.
f
Unless otherwise agreed, the sum of
niobium, vanadium and titanium concentrations shall be = 0.15%.
MECHANICAL
REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa
T.Sa
ELONGATION
Tensile Strengthb
Mpa(psi)
Mpa(psi)
Mpa(psi)
min
min
min
min
415(60 200)
520(75 400)
c
520 (75 400)
a
For intermediate grades, the
differencec between the specified minimum tensile strength and the
specified minimum yield strength for the pipe body shall be as given
in the table for the next higher grade.
b
For Intermediate grades, the
specified minimum tensile strength for the weld seam shall be the
same value as was determines for the pipe body using footnote a)
c
The specified minimum elongation, Af,
expressed in percent and rounded to the nearest percent, shall be as
determined using the following equation:
API 5L450 OR X65
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis a
SEAMLESS PIPE
C
Mn
P
S
V
Nb
Ti
maxb
max.b
min.
max.
max.
max.
max.
max.
0.28e
1.40e
-
0.030
0.030
f
f
f
WELDED PIPE
0.26
1.45e
-
0.030
0.030
f
f
f
a
0.50% maximum for copper, 0.50%
maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum
for molybdenum. For grades up to and including L360/X52, Cu, Cr and
Ni shall not be added intentionally.
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 manganese 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.
e
Unless otherwise agreed.
f
Unless otherwise agreed, the sum of
niobium, vanadium and titanium concentrations shall be = 0.15%.
MECHANICAL
REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa
T.Sa
ELONGATION
Tensile Strengthb
Mpa(psi)
Mpa(psi)
Mpa(psi)
min
min
min
min
450(65 300)
535(77 600)
c
535 (77 600)
a
For intermediate grades, the
differencec between the specified minimum tensile strength and the
specified minimum yield strength for the pipe body shall be as given
in the table for the next higher grade.
b
For Intermediate grades, the
specified minimum tensile strength for the weld seam shall be the
same value as was determines for the pipe body using footnote a)
c
The specified minimum elongation, Af,
expressed in percent and rounded to the nearest percent, shall be as
determined using the following equation:
API 5L 485 OR X70
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis a
SEAMLESS PIPE
C
Mn
P
S
V
Nb
Ti
maxb
max.b
min.
max.
max.
max.
max.
max.
0.28e
1.40e
-
0.030
0.030
f
f
f
WELDED PIPE
0.26e
1.65e
-
0.030
0.030
f
f
f
a
0.50% maximum for copper, 0.50%
maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum
for molybdenum. For grades up to and including L360/X52, Cu, Cr and
Ni shall not be added intentionally.
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 manganese 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.
e
Unless otherwise agreed.
f
Unless otherwise agreed, the sum of
niobium, vanadium and titanium concentrations shall be = 0.15%.
MECHANICAL
REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa
T.Sa
ELONGATION
Tensile Strengthb
Mpa(psi)
Mpa(psi)
Mpa(psi)
min
min
min
min
485(70 300)
570(82 700)
c
570 (82 700)
a
For intermediate grades, the
differencec between the specified minimum tensile strength and the
specified minimum yield strength for the pipe body shall be as given
in the table for the next higher grade.
b
For Intermediate grades, the
specified minimum tensile strength for the weld seam shall be the
same value as was determines for the pipe body using footnote a)
c
The specified minimum elongation, Af,
expressed in percent and rounded to the nearest percent, shall be as
determined using the following equation:
PSL2
API 5L 245 OR B
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis % maximum
CARBON EQUIVALENT a
% MAXIMUM
PIPE GRADE
Cb
Si
Mnb
P
S
V
Nb
Ti
Other
CEIIW
CEPcm
SEAMLESS & WELDED PIPES
L245R OR BR
0.24
0.40
1.2
0.03
0.02
c
c
0.04
e
0.43
0.25
L245Q OR BQ
0.18
0.45
1.4
0.03
0.02
0.05
0.05
0.04
e
0.43
0.25
WELDED PIPE
L245M OR BM
0.22
0.45
1.2
0.03
0.02
0.05
0.05
0.04
e
0.43
0.25
a
Based upon product analysis. For
seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent
limits shall be as agreed. The CELLW limits apply if the carbon mass
fraction is greater than 0.12% and the CEpcm limits apply if the
carbon mass fraction is less than or equal to 0.12%.
b
For each reduction of 0.01% below
the specified maximum for carbon, an increase of 0.05% above the
specified maximum for manganese is permissible, up to a maximum of
1.65% for grades = L245 or B
c
unless otherwise agreed, the sum of
th niobium & vanadium concentrations shall be = 0.06%
e
Unless otherwise agreed, 0.50%
maximum for copper, 0.30% maximum for nickel, 0.30% maximum for
chromium, & 0.15% maximum for molybdenum.
For intermediate grades, the
difference between the specified maximum yield strength and the
specified minimum yield strength shall be as given in the table for
the next higher grade, and the difference between the specified
minimum tensile strength and the specified minimum yield strength
shall be as given in the table for the next higher grade. For
intermediate grades lower than Grade L555 orX80, the tensile
strength shall be = 760 Mpa (110 200 psi). For intermediate grades
higher than Grade L555 or X80, the maximum permissible tensile
strength shall be obtained by interpolation. For SI units, the
calculated value shall be rounded to the nearest 5 Mpa. For USC
units, the calculated value shall be rounded to the nearest 100 psi.
b
For grades > L625 or X90, Rp0,2
applies.
c
This limit applies for pipe with D >
323,9 mm (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 footnote a).
e
For pipe with D< 219,1 mm (8.625
in), the maximum yield strength shall be = 495 Mpa (71 800 psi).
f
The specified munimum elongation, Af,
shall be as determined using the following equation:
API 5L 290 OR X 42
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis % maximum
CARBON EQUIVALENT a
% MAXIMUM
Cb
Si
Mnb
P
S
V
Nb
Ti
Other
CEIIW
CEPcm
SEAMLESS & WELDED PIPES
0.24
0.4
1.2
0.03
0.02
0.06
0.05
0.04
e
0.43
0.25
0.18
0.45
1.4
0.03
0.02
0.05
0.05
0.04
e
0.43
0.25
WELDED PIPE
0.22
0.45
1.3
0.03
0.02
0.05
0.05
0.04
e
0.43
0.25
a
Based upon product analysis. For
seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent
limits shall be as agreed. The CELLW limits apply if the carbon mass
fraction is greater than 0.12% and the CEpcm limits apply if the
carbon mass fraction is less than or equal to 0.12%.
b
For each reduction of 0.01% below
the specified maximum for carbon, an increase of 0.05% above the
specified maximum for manganese is permissible, up to a maximum of
1.65% for grades = L245 or B
e
Unless otherwise agreed, 0.50%
maximum for copper, 0.30% maximum for nickel, 0.30% maximum for
chromium,
For intermediate grades, the
difference between the specified maximum yield strength and the
specified minimum yield strength shall be as given in the table for
the next higher grade, and the difference between the specified
minimum tensile strength and the specified minimum yield strength
shall be as given in the table for the next higher grade. For
intermediate grades lower than Grade L555 orX80, the tensile
strength shall be = 760 Mpa (110 200 psi). For intermediate grades
higher than Grade L555 or X80, the maximum permissible tensile
strength shall be obtained by interpolation. For SI units, the
calculated value shall be rounded to the nearest 5 Mpa. For USC
units, the calculated value shall be rounded to the nearest 100 psi.
b
For grades > L625 or X90, Rp0,2
applies.
c
This limit applies for pipe with D >
323,9 mm (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 footnote a).
f
The specified munimum elongation, Af,
shall be as determined using the following equation:
API 5L 390 OR X 56
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis % maximum
CARBON EQUIVALENT a
% MAXIMUM
Cb
Si
Mnb
P
S
V
Nb
Ti
Other
CEIIW
CEPcm
SEAMLESS & WELDED PIPES
0.24
0.45
1.4
0.03
0.02
0.10 f
0.05
0.04
d,e
0.43
0.25
0.18
0.45
1.5
0.03
0.02
0.07
0.05
0.04
d,e
0.43
0.25
WELDED PIPE
0.22
0.45
1.4
0.03
0.02
d
d
d
e
0.43
0.25
a
Based upon product analysis. For
seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent
limits shall be as agreed. The CELLW limits apply if the carbon mass
fraction is greater than 0.12% and the CEpcm limits apply if the
carbon mass fraction is less than or equal to 0.12%.
b
For each reduction of 0.01% below
the specified maximum for carbon, an increase of 0.05% above the
specified maximum for manganese is permissible, up to a maximum of
1.65% for grades = L245 or B
d
the sum of the niobium &
vanadium & titanium concentrations shall be =0.15%
e
Unless otherwise agreed, 0.50%
maximum for copper, 0.30% maximum for nickel, 0.30% maximum for
chromium, & 0.15% maximum for molybdenum.
For intermediate grades, the
difference between the specified maximum yield strength and the
specified minimum yield strength shall be as given in the table for
the next higher grade, and the difference between the specified
minimum tensile strength and the specified minimum yield strength
shall be as given in the table for the next higher grade. For
intermediate grades lower than Grade L555 orX80, the tensile
strength shall be = 760 Mpa (110 200 psi). For intermediate grades
higher than Grade L555 or X80, the maximum permissible tensile
strength shall be obtained by interpolation. For SI units, the
calculated value shall be rounded to the nearest 5 Mpa. For USC
units, the calculated value shall be rounded to the nearest 100 psi.
b
For grades > L625 or X90, Rp0,2
applies.
c
This limit applies for pipe with D >
323,9 mm (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 footnote a).
f
The specified munimum elongation, Af,
shall be as determined using the following equation:
API 5L 415 OR X60
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis % maximum
CARBON EQUIVALENT a
% MAXIMUM
Cb
Si
Mnb
P
S
V
Nb
Ti
Other
CEIIW
CEPcm
SEAMLESS & WELDED PIPES
0.24f
0.45f
1.4f
0.03
0.02
0.10 f
0.05f
0.04f
g,h
as agreed
0.18f
0.45f
1.7f
0.03
0.02
g
g
g
h
0.43
0.25
WELDED PIPE
0.12f
0.45f
1.6f
0.03
0.02
g
g
g
h
0.43
0.25
a
Based upon product analysis. For
seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent
limits shall be as agreed. The CELLW limits apply if the carbon mass
fraction is greater than 0.12% and the CEpcm limits apply if the
carbon mass fraction is less than or equal to 0.12%.
b
For each reduction of 0.01% below
the specified maximum for carbon, an increase of 0.05% above the
specified maximum for manganese is permissible, up to a maximum of
1.65% for grades = L245 or B
f
Unless otherwise agreed
g
Unless otherwise agreed the sum of
the niobium, vanadium & titanium concentrations shall be =0.15%
h
Unless otherwise agreed, 0.50%
maximum for copper, 0.50% maximum for nickel, 0.50% maximum for
chromium, & 0.50% maximum for molybdenum.
For intermediate grades, the
difference between the specified maximum yield strength and the
specified minimum yield strength shall be as given in the table for
the next higher grade, and the difference between the specified
minimum tensile strength and the specified minimum yield strength
shall be as given in the table for the next higher grade. For
intermediate grades lower than Grade L555 orX80, the tensile
strength shall be = 760 Mpa (110 200 psi). For intermediate grades
higher than Grade L555 or X80, the maximum permissible tensile
strength shall be obtained by interpolation. For SI units, the
calculated value shall be rounded to the nearest 5 Mpa. For USC
units, the calculated value shall be rounded to the nearest 100 psi.
b
For grades > L625 or X90, Rp0,2
applies.
c
This limit applies for pipe with D >
323,9 mm (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 footnote a).
f
The specified munimum elongation, Af,
shall be as determined using the following equation:
API 5L 450 OR X 65
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis % maximum
Cb
Si
Mnb
P
S
V
Nb
SEAMLESS & WELDED PIPES
0.18f
0.45f
1.7f
0.03
0.02
g
g
WELDED PIPE
0.12f
0.45f
1.6f
0.03
0.02
g
g
a
Based upon product analysis. For
seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent
limits shall be as agreed. The CELLW limits apply if the carbon mass
fraction is greater than 0.12% and the CEpcm limits apply if the
carbon mass fraction is less than or equal to 0.12%.
b
For each reduction of 0.01% below the
specified maximum for carbon, an increase of 0.05% above the
specified maximum for manganese is permissible, up to a maximum of
1.65% for grades = L245 or B
f
Unless otherwise agreed
g
Unless otherwise agreed the sum of
the niobium, vanadium & titanium concentrations shall be =0.15%
h
Unless otherwise agreed, 0.50%
maximum for copper, 0.50% maximum for nickel, 0.50% maximum for
chromium, & 0.50% maximum for molybdenum.
For intermediate grades, the
difference between the specified maximum yield strength and the
specified minimum yield strength shall be as given in the table for
the next higher grade, and the difference between the specified
minimum tensile strength and the specified minimum yield strength
shall be as given in the table for the next higher grade. For
intermediate grades lower than Grade L555 orX80, the tensile
strength shall be = 760 Mpa (110 200 psi). For intermediate grades
higher than Grade L555 or X80, the maximum permissible tensile
strength shall be obtained by interpolation. For SI units, the
calculated value shall be rounded to the nearest 5 Mpa. For USC
units, the calculated value shall be rounded to the nearest 100 psi.
b
For grades > L625 or X90, Rp0,2
applies.
c
This limit applies for pipe with D >
323,9 mm (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 footnote a).
f
The specified munimum elongation, Af,
shall be as determined using the following equation:
API 5L 485 OR X70
CHEMICAL
COMPOSITION
Mass fraction, based upon heat and
product analysis % maximum
CARBON EQUIVALENT a
% MAXIMUM
Cb
Si
Mnb
P
S
V
Nb
Ti
Other
CEIIW
CEPcm
SEAMLESS & WELDED PIPES
0.18f
0.45f
1.8f
0.03
0.02
g
g
g
h
0.43
0.25
WELDED PIPE
0.12f
0.45f
1.7f
0.03
0.02
g
g
g
h
0.43f
0.25
a
Based upon product analysis. For
seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent
limits shall be as agreed. The CELLW limits apply if the carbon mass
fraction is greater than 0.12% and the CEpcm limits apply if the
carbon mass fraction is less than or equal to 0.12%.
b
For each reduction of 0.01% below
the specified maximum for carbon, an increase of 0.05% above the
specified maximum for manganese is permissible, up to a maximum of
1.65% for grades = L245 or B
f
Unless otherwise agreed
g
Unless otherwise agreed the sum of
the niobium, vanadium & titanium concentrations shall be =0.15%
h
Unless otherwise agreed, 0.50%
maximum for copper, 0.50% maximum for nickel, 0.50% maximum for
chromium, & 0.50% maximum for molybdenum.
For intermediate grades, the
difference between the specified maximum yield strength and the
specified minimum yield strength shall be as given in the table for
the next higher grade, and the difference between the specified
minimum tensile strength and the specified minimum yield strength
shall be as given in the table for the next higher grade. For
intermediate grades lower than Grade L555 orX80, the tensile
strength shall be = 760 Mpa (110 200 psi). For intermediate grades
higher than Grade L555 or X80, the maximum permissible tensile
strength shall be obtained by interpolation. For SI units, the
calculated value shall be rounded to the nearest 5 Mpa. For USC
units, the calculated value shall be rounded to the nearest 100 psi.
b
For grades > L625 or X90, Rp0,2
applies.
c
This limit applies for pipe with D >
323,9 mm (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 footnote a).
f
The specified munimum elongation, Af,
shall be as determined using the following equation:
Specified outside
Full-size CVN
absorbed energy,
diameter
minimum
D
Kv
mm (in)
J (ft.lbf)
Grade
= L415 or
> L415 0r X60
> L450 or X65
> L485 or X70
> L555 or X80
> L625 or X90
> L690 or X100
X60
= L450 or X65
= L485 or X70
= L555 or X80
= L625 or X90
= L690 or X100
= L830 or X120
=508 (20. 000)
27 (20)
27 (20)
27 (20)
40 (30)
40 (30)
40 (30)
40 (30)
>508 (20.000) to
27 (20)
27 (20)
27 (20)
40 (30)
40 (30)
40 (30)
40 (30)
=762 (30.000)
>762 (30.000) to
40 (30)
40 (30)
40 (30)
40 (30)
40 (30)
54 (40)
54 (40)
=914 (36.000)
>914 (36.000) to
40 (30)
40 (30)
40 (30)
40 (30)
40 (30)
54 (40)
68 (50)
=1 219 (48.000)
>1 219 (48.000) to
40 (30)
54 (40)
54 (40)
54 (40)
54 (40)
68 (50)
81 (60)
=1 422 (56.000)
>1 422 (56.000) to
40 (30)
54 (40)
68 (50)
68 (50)
81 (60)
95 (70)
108 (80)
=2134 (84.000)
9.8.3 Pipe weld and HAZ tests
The minimum average (of a set of
three test pieces) absorbed energy for each pipe weld and HAZ test,
based upon full-size test pieces and a test temperature of 0 °C
(32 °F), or if agreed a lower test temperature, shall be
a) 27 J (20 ft.lbf) for pipe with D <
1 422 mm (56.000in) in grades = L555 or X80;
b) 40 J (30 ft.lbf) for pipe with D =
1 422 mm (56.000 in);
c) 40 J (30 ft.lbf) for pipe in
grades > L555 or X80.
NOTE :The HAZ of the
longitudinal seam weld in HFW welded pipe is usually too narrow to
permit accurate sampling for Charpy testing. The requirement for
Charpy testing of the seam weld HAZ applies only to SAWL/SAWH and
COWL/COWH pipe
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