Pipeline pipes are mainly used for pipelines that transport oil and natural gas. It is mainly used in oil, natural gas, chemical, electric power equipment and other industries.
Delivery status:annealed, normalized, normalized + tempered and other heat treatment states
Pipeline pipes are mainly used for pipelines that transport oil and natural gas. It is mainly used in oil, natural gas, chemical, electric power equipment and other industries.
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Specifications |
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Out Diameter |
1/4 inch-36 inch |
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Wall Thickness |
1.25 mm-50 mm |
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Length |
3.0m-18m |
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Surface treatment |
oil dipping, shot blasting, painting, etc. |
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Delivery status |
annealed, normalized, normalized + tempered and other heat treatment states |
Standard:
API
Spec 5L- American Standard
GB/T9711-1999- National Standard
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Tolerances on Dimensions: |
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Standard: |
OD Tolerance |
WT Tolerance |
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API Spec 5L |
D< 60.3mm |
0.41mm,-0.8mm |
15%/-12.5% |
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D≥ 60.3mm |
±0.75% |
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GB/T9711-2 |
±0.5mm or ±0.75% |
T≤ 4 |
0.6mm/-0.5mm |
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4≤T≤ 25 |
15%/-12.5% |
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Mechanical Properties: |
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Standard |
Grade |
Tensile strength |
Yield strength |
Elongation |
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GB/T9711-1 |
L245 |
415 |
245 |
≥21 |
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L290 |
415 |
290 |
≥21 |
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L320 |
435 |
320 |
≥20 |
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L360 |
460 |
360 |
≥19 |
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L415 |
520 |
415 |
≥17 |
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GB/T9711-2 |
L245NB |
415 |
245～440 |
≥22 |
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L290NB |
415 |
290～440 |
≥21 |
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L360NB |
460 |
360～510 |
≥20 |
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L415NB |
520 |
415～565 |
≥18 |
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L450QB |
535 |
450～570 |
≥18 |
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API Spec 5L |
BN |
415～760 |
245～450 |
≥22 |
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X42N |
415～760 |
290～495 |
≥21 |
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X52N |
460～760 |
360～530 |
≥20 |
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X56N |
490～760 |
390～545 |
≥18 |
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X60N |
520～760 |
415～565 |
≥18 |
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X65Q |
535～760 |
450～600 |
≥18 |
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X70Q |
570～760 |
485～635 |
≥18 |
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X80Q |
625～825 |
555～705 |
≥18 |
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X42NS |
415～760 |
290～495 |
≥21 |
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X52NS |
460～760 |
360～530 |
≥20 |
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Chemical Properties（%） |
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Standard |
Grade |
C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
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GB/T9711-1 |
L245 |
≤0.27 |
- |
≤1.15 |
≤0.030 |
≤0.030 |
- |
- |
- |
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L290 |
≤0.29 |
- |
≤1.25 |
≤0.030 |
≤0.030 |
- |
- |
- |
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L320 |
≤0.31 |
- |
≤1.35 |
≤0.030 |
≤0.030 |
- |
- |
- |
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L360 |
≤0.29 |
- |
≤1.25 |
≤0.030 |
≤0.030 |
- |
- |
- |
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L415 |
≤0.26 |
- |
≤1.35 |
≤0.030 |
≤0.030 |
- |
- |
- |
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GB/T9711-2 |
L245NB |
≤0.16 |
≤0.40 |
≤1.10 |
≤0.025 |
≤0.020 |
- |
- |
- |
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L290NB |
≤0.17 |
≤0.40 |
≤1.20 |
≤0.025 |
≤0.020 |
≤0.05 |
≤0.05 |
≤0.04 |
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L360NB |
≤0.20 |
≤0.45 |
≤1.60 |
≤0.025 |
≤0.020 |
≤0.10 |
≤0.05 |
≤0.04 |
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L415NB |
≤0.21 |
≤0.45 |
≤1.60 |
≤0.025 |
≤0.020 |
≤0.15 |
≤0.05 |
≤0.04 |
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L450QB |
≤0.16 |
≤0.45 |
≤1.60 |
≤0.025 |
≤0.020 |
≤0.09 |
≤0.05 |
≤0.06 |
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API Spec 5L |
BN |
≤0.24 |
≤0.40 |
≤1.20 |
≤0.025 |
≤0.015 |
- |
- |
- |
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X42N |
≤0.24 |
≤0.40 |
≤1.20 |
≤0.025 |
≤0.015 |
- |
- |
≤0.04 |
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X52N |
≤0.24 |
≤0.45 |
≤1.40 |
≤0.025 |
≤0.015 |
- |
- |
≤0.04 |
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X56N |
≤0.24 |
≤0.45 |
≤1.40 |
≤0.025 |
≤0.015 |
- |
- |
≤0.04 |
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X60N |
≤0.24 |
≤0.45 |
≤1.40 |
≤0.025 |
≤0.015 |
- |
- |
≤0.04 |
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X65Q |
≤0.18 |
≤0.45 |
≤1.70 |
≤0.025 |
≤0.015 |
- |
- |
≤0.06 |
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X70Q |
≤0.18 |
≤0.45 |
≤1.70 |
≤0.025 |
≤0.015 |
- |
- |
≤0.06 |
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X80Q |
≤0.18 |
≤0.45 |
≤1.70 |
≤0.025 |
≤0.015 |
- |
- |
≤0.06 |
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X42NS |
≤0.14 |
≤0.40 |
≤1.35 |
≤0.020 |
≤0.003 |
≤0.05 |
≤0.05 |
≤0.04 |
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X52NS |
≤0.16 |
≤0.45 |
≤1.65 |
≤0.020 |
≤0.003 |
≤0.10 |
≤0.05 |
≤0.04 |
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As the proportion of oil and gas wells containing sulfur gradually increases in oilfield exploitation, the transmission line pipe from the exploitation to the desulfurization station contains a large amount of sulfide, which places higher demands on the performance of the transmission line pipe, Acid line pipe is the preferred choice for use in the above environment.
Seamless tubes are rolled using low sulfur, high purity steel with a calcium treatment, using the CPE or Assel rolling process with strict control of tube dimensions.
After heat treatment, the product performance can fully meet the performance index of API5L standard. We cooperate with the certified HIC and SSC laboratories, and in addition to the standard requirement testing, we also conduct sample testing during the testing process to ensure the corrosion resistance of the ex-factory products.