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API 5L X70 Pipe, Grade X70 Seamless Line Pipe

Date:2023-11-30    keywords: api 5l x70 pipe, grade X70 seamless line pipe, x70 pipeline steel

API 5L X70 Pipe, Grade X70 Line Pipe, X70 Carbon Steel Seamless Line Pipe, X70 PSL1/ PSL2 Carbon Steel Pipe Supplier

X70 Seamless line pipe is a high-strength steel pipe widely used in the field of oil and natural gas transportation. It is usually made of carbon steel. "X" represents the pipeline steel in the API standard, and 70 is the strength grade in kpsi. X70 represents pipeline steel with a minimum yield strength of 70kpsi and has excellent mechanical properties and corrosion resistance. The specification of X70 line pipe is 8-1240×1-200mm.

What is pipeline steel?

Pipeline steel refers to a type of steel with special requirements used in pipelines for transporting oil, natural gas, etc. Depending on the thickness and subsequent formation, it can be produced by hot tandem rolling units, steckel mills or plate rolling mills. Large diameter steel pipes are formed by spiral welding or UOE straight seam welding.

Mechanical properties are one of the important indicators for evaluating material performance, and are particularly critical for pipeline transportation. The mechanical properties of X70 seamless line pipe mainly include yield strength, tensile strength, elongation, etc.

Mechanical properties of X70 steel pipe:

Non-proportional extension strength RP0.2 (MPa): 485-605
Tensile strength (MPa): ≥570
Elongation A (%): ≥ 18

Permanent steel X70 seamless line pipe

X70 steel pipe has excellent mechanical properties, mainly including the following aspects:
1. High strength: The yield strength of X70 steel pipe can be as low as 485MPa, and the tensile strength can be as high as 635MPa. Its high strength allows X70 steel pipe to withstand greater pressure and tension.
2. Good toughness: X70 steel pipe has good toughness and ductility, and can maintain stable performance under terminal conditions.
3. Excellent corrosion resistance: X70 steel pipe has been specially treated and has good corrosion resistance, and can resist the erosion of acid and alkali media, seawater and other corrosive substances.

4. Excellent welding performance: X70 steel pipes can be connected through a variety of welding methods. The welded joints have high strength and can meet the requirements of pipeline construction.

X70 Chemical analysis:
C: ≤ 0.16
Si: ≤ 0.45
Mn: ≤ 1.70
P: ≤0.020
S: ≤0.010
V: ≤ 0.06
Nb: ≤ 0.05
Ti: ≤0.06

X70 steel pipe production process:
The production of X70 steel pipes is mainly carried out through the seamless steel pipe production process. First, high-quality steel billets will be selected, and after pretreatment, they will be perforated by a piercing machine; then, the perforated steel billet will be stretched, wall thickness reduced and other processes through the rolling mill, and finally the X70 carbon seamless steel pipe will be obtained.

Application fields of X70 steel pipe:
X70 steel pipe is widely used in oil and natural gas transportation fields due to its excellent mechanical properties. It is usually used in oil and gas pipelines, submarine pipelines, oil and gas pipelines and other projects, and can withstand the requirements of high pressure, high temperature and harsh environments.

Market prospects of X70 steel pipe:
As global energy demand continues to grow, the market prospects for X70 steel pipes are very broad. Especially in the field of oil and gas transportation, the strength and corrosion resistance of X70 steel pipes can meet more stringent requirements, so there is huge market demand.


X70 pipe is a steel pipe material with excellent mechanical properties and is mainly used in oil and natural gas transmission pipelines. Its yield strength is high, and its tensile strength and elongation also meet specification requirements. These excellent mechanical properties enable X70 pipes to withstand large external forces and pressures, ensuring safe and stable operation of pipelines.

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