X100 pipeline,X100 steel pipe rolling process
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One of the Top 500 enterprises in China foreign trade
QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association
X100 pipeline
Outside diameter: 16“-48“ (406 - 1.219 mm)
Length: max. 42‘ (13.200 mm)*
As a world class supplier of steel pipes, Eisenbau QCCO responded to these challenges by developing and now supplying longitudinally welded steel pipes produced from the latest generation of high strength steels, such as API 5L X80, X80 NACE, X100, X120 and X140, produced in both the TMCP and Q&T supply condition. These products find service in applications including:
X100 pipeline ,X80 PIPE LINE:
Tensile strength Rm: min. 770 MPa (in transverse direction)
Yield strength Rt0.5: min. 690 MPa (in transverse direction)
Low levels of hardness are particularly important to guarantee good toughness properties, while maintaining weight saving mechanical strength.
Elongation A 2“: min. 25%
Hardness: max. 300 HV10:
OTHER PIPE LINE.
Seamless API 5L line pipe
Standards: API 5L
Executive Standard and material: ISO3183, GB/T 9711: L175, L210, L245, L290, L320, L360, L390, L415, L450, L485, L555, L625, L690, L830 API Spec5L: A25, A, B, X42, X46, X52, X56, 60, X65, X70, X80, X90, X100, X120
Other steel grade is available as per clients requirements.
Specifications: O. D. 89-1220mm, W. T. 3- 16mm.
Standards: API 5L
Executive Standard and material: ISO3183, GB/T 9711: L175, L210, L245, L290, L320, L360, L390, L415, L450, L485, L555, L625, L690, L830 API Spec5L: A25, A, B, X42, X46, X52, X56, 60, X65, X70, X80, X90, X100, X120
Other steel grade is available as per clients requirements.
Specifications: O. D. 89-1220mm, W. T. 3- 16mm.
X100 pipeline rolling process
In the transport of oil and gas, and pipeline transportation is an efficient, economical, safe, pollution, is an effective tool for long-distance transport of oil and gas, and because of its economy, safety and continuity of the advantages obtained by the developed countries the widespread attention. Thus pipeline become the research and production of micro alloy steel and high-strength low-alloy areas most vibrant an important branch. With the development of the world's oil and gas industry, long-distance pipeline construction is moving large-diameter, thick-wall, the direction of the development of high-voltage transmission, the transmission medium with oil from the main gas transmission main changes to the order, which requires pipeline steel with high strength and high toughness.
At present, has been widely used at home and abroad X80 grade pipeline steel, X100 and X120 grade experimental production also continue to improve the process. Senior
X100 pipeline steel pipe applications have huge economic benefits, can make long-distance oil and gas pipelines cost savings of 5% to 12%, mainly in material savings, improve delivery pressure, reducing the amount of construction, reduce maintenance costs, optimize the overall scheme, etc. . Changes in the organization and performance of
X100 pipeline steel pipe under different rolling process is different.
Using Gleeble-1500D thermal simulation machine to simulate the X100 pipeline
steel pipe rolling process, and through LeicaMEF-4M type microscope, HITACHIS-4500 scanning electron microscopy and microhardness study the microstructure of the steel under different process and the variation of mechanical properties. The results showed that:
X100 pipeline steel pipe is mainly composed of granular bainite and lath bainite.
Increasing the amount of deformation of the finish reduced austenite stability, improved transformation start temperature, while reducing the hardness, but by a smaller amount of deformation of the microstructure of lath bainite transformation to a larger deformation under the granular bainite. With the amount of deformation and final finish cooling temperature is lowered, the number of M / A islands reduced distribution becomes more finely dispersed.
In 25% to 40% deformation, at 20 ℃ / s cooling rate conditions, experimental steel phase transformation temperature range of 635 ~ 330 ℃, most of which phase transition occurs in 550 ~ 400 ℃. At 25% to 40% deformation conditions, the final cooling temperature is 600 ~ 350 ℃ experiment steel microstructure essentially granular tissue or granular bainite, but decreases with the end of the cold temperature, the organization gradually refined, while M / A size and volume fraction decreases; more lath bainite / martensite after the end of the cold temperatures below 350 ℃. By refining the granular bainite can get very high hardness values (> 300HV), the conversion of strength far greater than 700MPa.
At 600 ℃ isothermal phase transition occurs section, but with the extension of the isothermal time, the experiment has not reduced the hardness of steel, but also a slight increase, which may place the deformed austenite isothermal dislocation configuration changes and NbC precipitates etc. precipitation related.
