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GB/T 9711
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GB/T 9711
Still deciding? Get samples first, Contact US !
- Description
-
Product Description
GB/T 9711-2017 steel pipes are steel pipes for pipeline transportation systems in the oil and gas industry, including two product specification levels (PSL1 and PSL2), welded pipes are manufactured by CW, LFW, HFW, LW, SAWL, SAWH, COWL and COWH processes.
Product Size
Outside diameter: NPS 1/2～24; 21.3～610mm
Wall thickness: SCH 20～160; 2.77～70.00mm
End: flat end, beveled or threaded for selection
Length: 3～12 meters or SRL, DRL, double and fixed feetPackaging
Clear/black painted, hot-dipped galvanized or anti-corrosion treatment (FBE, 3LP, 3LPP) on external surfaces, steel strapping.
Chemical composition
Wall thickness ≤ 25.0mm PSL1 tube chemical composition
Steel grade
C
Mn
P
S
V
Nb
Ti
Other a,g
≤b，%
≥，%
≤，%
≤，%
L175 (A25)
0.21
0.60
0.030
0.030
L175P(A25P)
0.21
0.60
0.045
0.080
0.030
L210(A)
0.22
0.90
0.030
0.030
L245(B)
0.26
1.20
0.030
0.030
c,d
c,d
d
L290(X42)
0.26
1.30
0.030
0.030
d
d
d
L320(X46)
0.26
1.40
0.030
0.030
d
d
d
L360(X52)
0.26
1.40
0.030
0.030
d
d
d
L390(X56)
0.26
1.40
0.030
0.030
d
d
d
L415(X60)
0.26e
1.40e
0.030
0.030
f
f
f
L450(X65)
0.26e
1.45e
0.030
0.030
f
f
f
L485(X70)
0.26e
1.65e
0.030
0.030
f
f
f
a. Cu ≤ 0.50%; Ni ≤ 0.50%; Cr ≤ 0.50% and Mo ≤ 0.15%.
b. For every 0.01% decrease in carbon content from the specified maximum carbon content, the permissible manganese content shall be increased by 0.05% from the specified maximum manganese content, which shall be 1.65% for steel grades ≥ L245(B),but ≤ L360(X52), and 1.75% for steel grades ＞ L360(X52),but ＜ L485(X70); For steel grades > L360 (X52), but < L485 (X70), a maximum of 1.75% manganese.
c. Nb+V ≤ 0.06 %, unless otherwise agreed.
d. Nb+V+Ti ≤ 0.15 %.
e. Unless otherwise agreed.
f. Nb+V+Ti ≤ 0.15% unless otherwise agreed.
g. Intentional addition of boron is not permitted and residual boron content is to be ≤ 0.001 %.Wall thickness ≤ 25.0mm PSL2 tube chemical composition
Steel grade
Chemical composition ≥, %
Carbon equivalent a ≥, %
Cb
Si
Mnb
P
S
V
Nb
Ti
Other
CEIIW
CEPCM
L245R（BR）
0.24
0.40
1.20
0.025
0.015
c
c
0.04
e,i
0.43
0.25
L290R（X42R）
0.24
0.40
1.20
0.025
0.015
0.06
0.05
0.04
e,i
0.43
0.25
L245N（BN）
0.24
0.40
1.20
0.025
0.015
0.04
e,i
0.43
0.25
L290N（X42N）
0.24
0.40
1.20
0.025
0.015
0.06
0.05
0.04
e,i
0.43
0.25
L320N（X46N）
0.24
0.40
1.40
0.025
0.015
0.07
0.05
0.04
d,e,i
0.43
0.25
L360N（X52N）
0.24
0.45
1.40
0.025
0.015
0.10
0.05
0.04
d,e,i
0.43
0.25
L390N（X56N）
0.24
0.45
1.40
0.025
0.015
0.10f
0.05
0.04
d,e,i
0.43
0.25
L415N（X60N）
0.24
0.45f
1.40f
0.025
0.015
0.10f
0.05f
0.04
g.h,i
As agreed
L245Q（BQ）
0.18
0.45
1.40
0.025
0.015
0.05
0.05
0.04
e,
0.43
0.25
L290Q（X42Q）
0.18
0.45
1.40
0.025
0.015
0.05
0.05
0.04
e,
0.43
0.25
L320Q（X46Q）
0.18
0.45
1.40
0.025
0.015
0.05
0.05
0.04
e,l
0.43
0.25
L360Q（X52Q）
0.18
0.45
1.50
0.025
0.015
0.05
0.05
0.04
e,I
0.43
0.25
L390Q（X56Q）
0.18
0.45
1.50
0.025
0.015
0.07
0.05
0.04
d,e,I
0.43
0.25
L415Q（X60Q）
0.18f
0.45f
1.70f
0.025
0.015
g
g
g
h,I
0.43
0.25
L450Q（X65Q）
0.18f
0.45f
1.70f
0.025
0.015
g
g
g
h,
0.43
0.25
L485Q（X70Q）
0.18f
0.45f
1.80f
0.025
0.015
g
g
g
h,I
0.43
0.25
L555Q（X80Q）
0.18f
0.45
1.90
0.025
0.015
g
g
g
ij
As agreed
L625Q（X90Q）
0.16f
0.45
1.90
0.020
0.010
g
g
g
j,k
As agreed
L690Q（X100Q）
0.16
0.45f
1.90
0.020
0.010
g
g
g
j,k
As agreed
L245M（BM）
0.22
0.45
1.20
0.025
0.015
0.05
0.05
0.04
e,i
0.43
0.25
L290M（X42M）
0.22
0.45
1.30
0.025
0.015
0.05
0.05
0.04
e,j
0.43
0.25
L320M（X46M）
0.22
0.45
1.30
0.025
0.015
0.05
0.05
0.04
e,l
0.43
0.25
L360M（X52M）
0.22
0.45
1.40
0.025
0.015
d
d
d
e,l
0.43
0.25
L390M（X56M）
0.22
0.45
1.40
0.025
0.015
d
d
d
e,i
0.43
0.25
L415M（X60M）
0.12
0.45f
1.60f
0.025
0.015
g
g
g
h,i
0.43
0.25
L450M（X65M）
0.12f
0.45f
1.60f
0.025
0.015
g
g
g
h,i
0.43
0.25
L485M（X70M）
0.12
0.45f
1.70f
0.025
0.015
g
g
g
h,i
0.43
0.25
L555M（X80M）
0.12
0.45f
1.85f
0.025
0.015
g
g
g
i,
0.43f
0.25
L625M（X90M）
0.10
0.55f
2.10f
0.020
0.010
g
g
g
i,l
0.25
L690M（X100M）
0.10
0.55
2.10f
0.020
0.010
g
g
g
I,j
0.25
L830M（X120M）
0.10
0.55f
2.10f
0.020
0.010
g
g
g
I,j
0.25
a. Based on the results of product analysis, for welded pipes with a wall thickness >20.0 mm, the limit value of carbon equivalent shall be determined by agreement. For carbon content C > 0.12 % use CEiiw, for carbon content C ≤ 0.12 % use CEpcm.
b. For every 0.01 % decrease in carbon content over the specified maximum carbon content, the manganese content is allowed to increase by 0.05 % over the specified maximum manganese content. For steel grades ≥ L245 (B), but ≤ L360 (X52), the maximum manganese content shall be 1.65 %; for steel grades ＞ L360 (X52), but ＜ L485 (X70), the maximum manganese content shall be 1.75%; for steel grades For grades >L360 (X52), but <L485 (X70), the maximum manganese content is 1.75%; for grades ≥L485 (X70), but ≤L555 (X80), the maximum manganese content is 2.00%. For steel grades > L555 (X80), the maximum manganese content is 2.20%.
c. Nb+V ≤ 0.06 %, unless otherwise agreed.
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.
f. Unless otherwise agreed.
g. Unless otherwise agreed, Nb+V+Ti≤0.15%. h. Unless otherwise agreed.
h. Unless otherwise agreed, Cu ≤ 0.50%; Ni ≤ 0.50%; Cr ≤ 0.50% and Mo ≤ 0.50%. i. Unless otherwise agreed. ii.
i. Unless otherwise agreed, Cu ≤ 0.50%; Ni ≤ 1.00%; Cr ≤ 0.50% and Mo ≤ 0.50%. ii.
j. B≤0.004%.
k. Cu ≤ 0.50%; Ni ≤ 1.00%; Cr ≤ 0.55% and Mo ≤ 0.80%.
l. For all PSL2 grades other than those to which footnote j has been applied, the following applies: intentional addition of boron is not permitted and residual boron content is to be ≤ 0.001%, unless otherwise agreed.Application range
Typically used in pipeline transportation systems in the oil and gas industry.
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Yantai Pipe industry Co., Ltd.,
E-mail: info@yantaipipe.cn
WhatsApp: 8615653819370
Tel: 0086-535-6281117
Add: No. 161 Changjiang Road, FTZ, Yantai , China