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low temperature carbon steel pipe

Categories	round steel pipe
Brand	Yuantai Derun Steel Pipe Manufacturing Group
Model	ytdr-458
Low temperature steel pipe specifications	8-1240×1-200mm
Material	10MnDG,09DG,09Mn2VDG,06Ni3MoDG, ASTM A333Gr1-11
Process	Cold drawn and hot rolled
Executive standards	GB/T18984-2003、ASTM A333
Weight calculation formula	(O.D.-wall THK) * Wall THK *0.02466=meters/KG
FOB port	Tianjin Xingang Port
Terms of Payment	L/C, T/T
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Update Time	Nov 21,2024

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Detail Information

Low temperature steel pipes are medium carbon structural steel, and both cold and hot and low temperature steel pipes have good mechanical properties, low prices, wide sources, and wide applications. Its biggest weakness is its low hardenability, and it is not suitable for workpieces with large cross-sectional dimensions and high requirements.

Low temperature resistant steel pipe cutting and retail, low temperature resistant steel pipe wire processing, using low sulfur, low phosphorus, high purity steel and undergoing calcification treatment can effectively reduce the low-temperature brittleness of the steel and improve the impact toughness of the product. The company has a cooling tank of 0~-100 ℃, which can conduct low-temperature impact tests in batches.

Ensure the quality stability of the factory products. Low temperature resistant steel pipes are mainly used for -45 ℃ to -195 ℃ grade low-temperature pressure vessel pipelines and low-temperature heat exchanger pipelines, and can also be used for fluid transportation in low-temperature environments. The low-temperature resistant oil casing of API 5CT is mainly used for oil well production in extremely cold regions.

Application of low-temperature steel pipes

1. Low temperature steel pipe is an important basic material for petroleum, chemical, nuclear industry and other industries, and it is widely used.

2. In many fields, the performance requirements for low-temperature pipelines are very high. If the temperature of the conveying medium is between -196 ° C and -404 ° C, the working pressure is generally not greater than 2.5 MPa (megapascals).

3. Used for liquid or gas transmission pipelines and engineering supporting pipes.

4. Structural components for heating furnaces, evaporators, and reboilers used in the chemical industry.

5. Connecting pipeline and valve of heat exchanger of distillation equipment in oil refinery.

6. Equipment and components of food and drinking water treatment systems, as well as pipelines in agricultural irrigation and drainage systems.

7. The connecting pipeline for the supply and return air devices in the sand well of the mine.

8. Corrosion resistant pipelines in seawater utilization devices.

9. Imported air ducts for various refrigerators and freezers.

10. Process piping for transporting high-temperature and high-pressure fluids and corrosive fluids on fertilizer equipment.

11. The catalyst layer and its supports in the petrochemical cracking process.

12. Insulation of the digester and condenser tubes in papermaking machinery.

13. Oil field injection well water-cooled wall heating and pressure reducer.

14. Steam water separation reheater in thermal power plants.

15. Buried drainage pipes for oil depots.

16. Long distance oil (gas) pipelines.

17. Protective sleeve for submarine optical cables.

18. Flexible cables for natural gas trunk transportation.

19. Lng natural gas pipeline in the "West East Gas Pipeline" project.

20. High and low pressure polyethylene outer sheath for the "Sichuan East Gas Transmission" project.

21. Urban streetlight poles.

22. Outdoor heating and cooling pipelines.

23. Longitudinal isolation and noise reduction pillars for highways.

Heat treatment method for low-temperature steel pipes

Standard for low-temperature steel pipes	Material grade	Heat treatment method	Mechanical properties of low-temperature steel pipes
			σb/MPa	σs/MPa≥	δ5 /%≥	HB	HC	Impact test Akv
			σb/MPa	σs/MPa≥	δ5 /%≥	HB	HC	/°C	/J≥
GB6479	10	normalizing	335~490	205	24	？	？	-20	18
GB6479	20	normalizing	410~550	245	24	？	？	-20	18
GB6479	16Mn	normalizing	490~670	320	21	？	？	-40	21
GB5310	20G	Normalized, hot-rolled pipes with a temperature not less than 900 ° C can replace normalized	410~550	245	24	？	？	-20	18
GB150-1998 Appendix A-A3	09MnD	normalizing	400~540	240	26	？	？	-50 ID ruler ten × ten seven point five × ten five × ten	? 21 18 14
GB13296 GB/T14976	All austenitic stainless steel seamless and welded pipes	？	？	？	？	？	？	-196	18

Standard number and main purpose	Low temperature steel pipe grade	Low temperature steel pipe heat treatment	Thickness/mm	Low temperature steel pipe tensile test				impact test		hardness
Standard number and main purpose	Low temperature steel pipe grade	Low temperature steel pipe heat treatment	Thickness/mm	σb /MPa	σs /MPa ≥	δ5 /% ≥	Φ/%≥	test temperature /° C	Akv /J ≥	HB≤
ASME Seamless and welded nominal pipes for low-temperature use	SA333Gr.1	Normalized at ≥ 845 ° C, air-cooled	？	≥380	205	35	?	-45	18	?
	SA333Gr.3	Normalized at ≥ 845 ° C, air-cooled	？	≥450	240	30	?	-100	18	？
	SA333Gr.6	Normalized at ≥ 845 ° C, air-cooled	？	≥415	240	30	?	-45	18	？
	SA333Gr.7	Normalized at ≥ 845 ° C, air-cooled	？	≥450	240	30	?	-75	18	?
	SA333Gr.8	First time: quenching (800 ° C ± 15 ° C)+tempering (565-605 ° C) Second time: (900 ° C ± 15 ° C) air cooling+(790 ° C ± 15 ° C) air cooling+(565-605 ° C) air cooling or water quenching	？	≥690	515	22	？	-195	？	？
	SA333Gr.9	Normalized at ≥ 845 ° C, air-cooled	？	≥435	315	28	?	-75	18	？
ASME Seamless and welded carbon and alloy steel pipes for low-temperature use	SA333Gr.1	Normalized at ≥ 845 ° C, air-cooled	？	380≥	205	35	？	-45	18	？
	SA333Gr.3	Normalized at ≥ 845 ° C, air-cooled	？	≥450	240	30	？	-100	18	？
	SA333Gr.6	Normalized at ≥ 845 ° C, air-cooled	？	≥415	240	30	？	-45	18	？
	SA333Gr.7	Normalized at ≥ 845 ° C, air-cooled	？	≥450	240	30	？	-75	18	？
	SA333Gr.8	First time: quenching (800 ° C ± 15 ° C)+tempering (565-605 ° C) Second time: (900 ° C ± 15 ° C) air cooling+(790 ° C ± 15 ° C) air cooling+(565-605 ° C) air cooling or water quenching	？	≥690	520	22	？	-195	18	？

Impact temperature:

grade	Minimum impact test temperature
	℉	℃
16MnDG	--	-45
10MnDG	--	-45
09DG	--	-45
09Mn2VDG	--	-70
06Ni3MoDG	--	-100
A333 Grade1	-50	-45
A333 Grade3	-150	-100
A333 Grade4	-150	-100
A333 Grade6	-50	-45
A333 Grade7	-100	-75
A333 Grade8	-320	-195
A333 Grade9	-100	-75
A333 Grade10	-75	-60
A333 Grade11	--	--

Table of Mechanical Properties of Low Temperature Steel Pipe:

Standard	Grade	Tensile strength (Mpa)	Yield strength (Mpa)	Elongation rate (%)
GB/T1898-2003	16MnDG	490-665	≥325	≥30
	10MnDG	≥400	≥240	≥35
	09DG	≥385	≥210	≥35
	09Mn2VDG	≥450	≥300	≥30
	06Ni3MoDG	≥455	≥250	≥30
ASTM A333	Grade1	≥380	≥205	≥35
	Grade3	≥450	≥240	≥25
	Grade4	≥415	≥240	≥20
	Grade6	≥415	≥240	≥16.5
	Grade7	≥450	≥240	≥16.5
	Grade8	≥690	≥515	≥22
	Grade9	≥ 435	≥315	--
	Grade10	≥550	≥450	--
	Grade11	≥450	≥ 240	--

Chemical composition table of low-temperature steel pipes:

Standard

Grade

Chemical composition (%)

GB/T18984

-2003

Carbon steel pipe pressure rating chart

Classification standards for pressure pipelines

The classification standards for pressure pipelines are usually based on the pressure level they bear, and the commonly used classification standards are as follows:

1. Low pressure pipeline (Class L): Pipelines that withstand working pressure less than 0.1MPa belong to the low pressure pipeline class and are usually used to transport low-pressure liquids or gases.

2. Medium pressure pipeline (Class M): Pipelines that withstand working pressures between 0.1MPa and 1.6MPa belong to the medium pressure pipeline class and are usually used to transport liquids or gases under normal working conditions.

3. High pressure pipelines (Class H): Pipelines that withstand working pressures between 1.6MPa and 10MPa belong to the high-pressure pipeline class and are usually used to transport high-pressure liquids or gases.

4. Ultra high pressure pipelines (Class U): Pipelines that withstand working pressure greater than 10MPa belong to the ultra-high pressure pipeline class and are usually used to transport high-pressure liquids or gases under special requirements.

In addition, according to the American standard (ASME B31.3), the grade of pressure pipelines can also be classified based on pipeline material, design temperature, and design pressure. The classification criteria are as follows:

1. Level 1: Suitable for carbon steel pipelines under low and high temperature conditions. The design temperature is below -29 ° C or above 260 ° C, and the design pressure is below 1.03MPa.

2. Level 2: Suitable for carbon steel pipelines with higher temperatures and pressures. The design temperature is below -29 ° C or above 260 ° C, and the design pressure is between 1.03MPa and 103MPa.

3. Level 3: Suitable for stainless steel pipes and nickel based alloys. The design temperature is below -29 ° C or above 260 ° C, and the design pressure is between 1.03MPa and 148.2MPa.

4. Level 4: Suitable for various materials of pipelines under high temperature and high pressure conditions. The design temperature is below -29 ° C or above 343 ° C, and the design pressure is between 1.93MPa and 206.8MPa.

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