Seamless steel tubes for high-pressure chemical fertilizer

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Product Description:

Seamless steel tubes for high-pressure chemical fertilizer processmg equipmentStandard:
GB6479 Chinese national standard
Application:
Seamless steel tubes for high-pressure chemical fertilizer processing equipment and pipelines thereof
Model No.of steel tubes:
10、20、16Mn、10MoWVNb、15CrMo、1Cr5Mo、12 Cr2Moetc
.Diamensional tolerances:

Types of steel tubes

Outer diameter

Wall thickness

Cold-rolled tubes
Tube sizes(mm)

Tolerances(mm)

Tube sizes (mm)

Tolerances(mm)

>30~50

±0.3

≤30

±10%

>50~219

±0.8%

Hot-rolled tubes

>219

±1.0%

>20

±10%

Mechanical properties:

标准

牌号

抗拉强度(MPa)

屈服强度(MPa)

伸长率(%)

冲击功(J)

低温冲击Akv

GB6479

10

335~490

≥205

≥24

/

-20℃≥18

20

410~550

≥245

≥24

≥39

-20℃≥18

16Mn

490~670

≥320

≥21

≥47

-40℃≥21

10MoWVNb

470~670

≥295

≥19

≥62

15CrMo

440~640

≥235

≥21

≥47

1Cr5Mo

390~590

≥195

≥22

≥94

12 Cr2Mo

450~600

≥280

≥20

≥38

Chemical composition:

Standard codes
Models of steel tubes

Chemical compositions(%)

C

Si

Mn

P

S

Cr

Mo

Ni

GB

6479

10

0.07~0.14

0.17~0.37

0.35~0.65

≤0.030

≤0.030

/

/

/

20

0.17~0.24

0.17~0.37

0.35~0.65

≤0.030

≤0.030

/

/

/

16Mn

0.12~0.20

0.20~0.60

1.20~1.60

≤0.030

≤0.030

10MoWVNb

0.07~0.13

0.50~0.80

0.50~0.80

≤0.030

≤0.030

/

0.60~0.90

/

15CrMo

0.12~0.18

0.17~0.37

0.40~0.70

≤0.030

≤0.030

0.80~1.10

0.40~0.55

/

1Cr5Mo

≤0.15

≤0.50

≤0.60

≤0.030

≤0.030

4.00~6.00

0.45~0.60

≤0.60

12 Cr2Mo

0.80~0.15

≤0.50

0.40~0.70

≤0.030

≤0.030

2.0~2.50

0.90~1.20

NOTE:the residual contents of the elements for the steel 10:Ni≤0.25%、Cr≤0.15%、Cu≤0.20%
the residual contents of the elements for the steel 20:Ni≤0.25%、Cr≤0.25%、Cu≤0.20%、Mo≤0.15%、V≤0.08%
the residual contents of the elements for the steel Ni≤0.30%、Cr≤0.30%、Cu≤0.20%



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Q:Are the welded and galvanized tubes the same weight?
The difference is that because zinc has weight, even if the difference is very small, there are also differences,Galvanized pipe weight is basically the same about 1.06 of the welded tube, of course, you can artificially ignored.
Q:What is the difference between seamless steel pipe and welded pipe?
Such as hydraulic equipment pipeline connection. The weld seam of common steel pipe is its weak link, and the quality of weld is the main factor that affects its overall performance. People who have lived in the north have experienced the experience of freezing pipes and pipes in winter, and the places where they burst are usually welds. Welded pipe is not seamless steel pipe.
Q:How much is 4 inches steel tube MM?
Seamless root weight per meter: 1 mm (diameter - thickness) * wall thickness of *0.02466*1 meters is? Normal KG/M pipe length 8-11rice
Q:What's the use of steel pipe?
Steel pipe is not only used to transport fluid and powder solid, exchange heat energy, and manufacture mechanical parts and containers, but also is an economic steel. It can reduce weight and save 20 to 40% of metal by using steel pipe to make building structure, network frame, prop and mechanical support. Moreover, it can realize factory mechanization construction. (
Q:Difference between cold rolled steel pipe and common steel pipe
1, from the dimension accuracy above, cold-rolled steel pipe size is good, high precision2. from the outward appearance, the surface of cold-rolled steel pipe is bright, and the surface of hot rolled steel pipe has obvious oxide skin or red rust
Q:Which is better, galvanized steel pipe or stainless steel?
Stainless steel is good.Stainless steel (Stainless Steel) is referred to as the stainless steel, the resistance of air, steam, water and other weak corrosive medium or with stainless steel known as stainless steel; while the resistance to chemical corrosion (acid, alkali and salt chemical etching) corrosion of steel called acid resistant steel. Because of the difference in the chemical composition of the two, and make their corrosion resistance is different, ordinary stainless steel is generally not resistant to chemical medium corrosion, and acid resistant steel are generally stainless steel.
Q:What quota is reserved for buried DN20 steel pipe?
If it is reserved for embedded pipe pre buried steel waterproof casing, set of waterproof casing steel production and installation is to set the quota items, if the outdoor installation of welded steel pipe buried steel casing pre quota items, if it is a reserved hole, then there is no need to set the quota items.
Q:Steel pipe is particularly long, how to clean the inner wall of the pipe so that it can be thoroughly cleaned
High cleanliness requirements for ultrasonic cleaningUltrasonic cleaning principle: the pressure change of ultrasonic wave propagation in the liquid in the liquid cavitation phenomenon strongly, per second produced millions of tiny gas bubbles, these bubbles rapidly in large pressure under the action of not following the violent explosion, impact force and produce strong suction, enough to make the stubborn dirt quickly stripped.
Q:What does GALV mean in a steel tube?
Steel tube (Steel pipe) production technology development began in the bicycle manufacturing industry, the rise of the early nineteenth Century during the oil development, the two world war ships, boilers, aircraft manufacturing, manufacturing of power boiler after the Second World War, the development of chemical industry of petroleum and natural gas drilling and transportation, will effectively promote the the yield and quality of varieties, the development of steel tube industry.
Q:Why seamless steel pipe called seamless steel pipe?
Seamless is relative to welded steel pipe, because welded steel pipe is welded with steel strip, seamless steel pipe is made of whole round steel empty, no welding seam.

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