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:What is the difference between hot dip galvanized steel pipe and galvanized steel pipe?
Galvanized steel pipe is commonly known as "cold plated tube", using electroplating process, only galvanized steel pipe in the outer wall, the wall of the pipe is not galvanizedHot dip galvanized steel pipe adopts hot-dip galvanizing process, and the inner and outer walls of the steel pipe have zinc coating.
Q:What does "steel pipe SC" mean?
SC is an ordinary welded pipe, equal to water professional DN, SC is welded steel pipe concealed, general pipe wall is relatively thick, S represents pipe material, C represents laying mode, TC stands for wire pipe concealed, pipe wall is thinner.
Q:How to identify stainless steel pipe and steel pipe?
Steel pipe according to the production method can be divided into two categories: seamless steel pipe and pipe joints, pipe joints as welded steel pipe.1. seamless steel tube according to the production methods can be divided into: hot-rolled seamless pipe, cold drawn tube, precision steel tube, heat expansion tube, cold spinning tube and extrusion tube.Seamless steel tubes are made of high quality carbon or alloy steel. They are hot-rolled and cold-rolled (drawn).Bundled steel pipe2. welded steel pipe for different welding process and divided into the furnace pipe welding (ERW) pipe and automatic arc welding, because of the different forms of welding seam welded pipe and spiral welded pipe is divided into two kinds, end its shape is divided into circular welded and shaped (square, flat) pipe.
Q:Is there a weld on the outer wall of seamless steel tube?
Seamless steel pipe, not seamless steel pipe, seamless steel pipe, welded seam, how can it be called seamless pipe?. Tell you a method: measurement of wall thickness, multi test several points, if each point, that is because it is cold drawn pipe, seamless pipe, hot rolling, wall thickness may% by sample.
Q:How many meters per ton of steel tube?
Metric tons are metric units and China adopts metric system, so what we Chinese usually say "ton" means "metric ton", which can be regarded as "metric ton"1 metric tons (tonne/metric ton) = 1000 kg1 tons = 1000 kg1 kg = 1000 grams
Q:There are multiple welded galvanized steel pipe outer diameter 108mm wall thickness 4mm length of 6 meters
Galvanized steel pipe is divided into cold galvanized steel pipe, hot galvanized steel pipe, cold galvanized steel pipe has been banned, and the latter is also advocated by the state for the moment, can be used. In 60s and 70s, developed countries began to develop new types of pipes, and galvanized pipes were banned. China's Ministry of construction and other four ministries also issued a civilization, indeed from two, 000 years since the galvanized pipe as a water supply pipe, the New District cold water pipe has rarely used galvanized pipe, and some of the hot water pipe is galvanized pipe. Hot dip galvanized steel pipe is widely used in fire, power and highway.
Q:What is an electric welded pipe (EFW)? Seek help!
It is through one or several consumable between the electrode and the workpiece on the metal heating the metal between a process with the arc to metal and filler material fully melted, no pressure, filler metal parts work from all electrodes
Q:What is the difference between galvanized iron pipe and galvanized steel pipe? Or called different, in fact, is referred to as galvanized pipe?
Different materials, cast iron, steel seamless steel pipe; the different production process, cast iron is hot metal casting, steel rolling mill of seamless steel tube is through processing, different performance indexes, ductile iron diameter, wall thickness, crisp texture, relatively heavy, can be made of seamless steel pipe diameter is very small, the wall is very thin, good toughness, light. Cast iron, cheap, but the bottom of the strength, can only be used in low pressure occasions.
Q:Does the seamless steel pipe need rust removal?
The use of solvent, emulsion cleaning steel surface, in order to achieve the removal of oil, grease, dust, lubricants and other similar organic compounds, but it can not remove rust, scale, welding of steel surface, so the production in anti-corrosion only as an auxiliary means.
Q:Where is a steel pipe casing usually used?
The casing, usually used in the basement construction, to protect the pipeline or convenient pipeline installation hoops.

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