Seamless steeI tubes for structures

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Product Description:

Standards:
GB,_r81 62 Chinese national standard
ASTM A53 Standard of American Society of Testing Materials
ASME SA53 Boiler and pressure vessel--c-Ojrde of ASME
Application:
Seamless steel tubes for manufacturing pipelines。vessels,equipment and mechanical structures
Models of major steeI tubes:
1 O,20,35、45,Q345,1 5CrMo,1 2Crl MoV,A53A,A53B,SA53A,SA53B, etc.

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:

Standard codes
Models of steel tubes

Tensite strength(MPa)

Yield strength(MPa)

Elongation(%)

GB/T8162

10

≥335

≥205

≥24

20

≥390

≥245

≥20

35

≥510

≥305

≥17

45

≥590

≥335

≥14

Q345

≥490

≥325

≥21

15CrMo

≥440

≥295

≥22

12Cr1MoV

≥490

≥245

≥22

ASTM A53

ASME SA53

A

≥330

≥205

Check the table in ASTM A 53
Check the table in ASME SA53

B

≥415

≥240

Chemical composition:

Standard codes
Models of steel tubes

Chemical compositions(%)

C

Si

Mn

P

S

Cu

Ni

Mo

Cr

V

GB/T8162

10

0.07~0.14

0.17~0.37

0.35~0.65

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.15

/

20

0.17~0.24

0.17~0.37

0.35~0.65

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

/

35

0.32~0.40

0.17~0.37

0.50~0.80

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

/

45

0.42~0.50

0.17~0.37

0.50~0.80

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

/

Q345

0.12~0.20

0.20~0.55

1.20~1.60

≤0.035

≤0.035

≤0.25

≤0.25

/

≤0.25

/

15CrMo

0.12~0.18

0.17~0.37

0.40~0.70

≤0.035

≤0.035

≤0.25

≤0.30

0.40~0.55

0.80~1.10

/

12Cr1MoV

0.08~0.15

0.17~0.37

0.40~0.70

≤0.035

≤0.035

≤0.25

≤0.30

0.25~0.35

0.90~1.20

0.15~0.30

ASTMA53

ASMESA53

A

≤0.25

/

≤0.95

≤0.05

≤0.06

≤0.40

≤0.40

≤0.15

≤0.40

≤0.08

B

≤0.30

/

≤1.20

≤0.05

≤0.06

≤0.40

≤0.40

≤0.15

≤0.40

≤0.08


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Q:Seamed steel pipe seamless steel pipe, carbon steel pipe, galvanized pipe, four how to distinguish between
Major use differentiation:1, seamed tube can withstand the maximum operating pressure is generally less than 20 kg, which is the most secure use. It is generally used in water, gas, compressed air and other low-pressure fluid;2 seamless tube can withstand ultra-high pressure, of course, its wall thickness will also increase, which needs to be designed according to pressure requirements. It is generally used in high-pressure oil pipes, boiler tubes and other high temperature and high pressure equipment. There are also seamless tubes for structural purposes, depending on the design requirements.3, there are some seamed steel pipe seamless treatment tube, it is the weld annealing treatment, eliminate the residual stress of the weld, the weld and base material, the pressure range of basic and seamless pipe is. May also consider the use of.4, of course, the market also has some use overall heating after drawing steel pipe joints or mandrel rolling seamless steel pipe, mainly in small size, only in the shape of this kind of pipe belongs to the seamless tube, it is not very good
Q:What are the specific differences between flexible pipes and rigid pipes?
From the model:Rigid waterproof sleeve: A, B and C, A type, suitable for steel pipe, B, suitable for cast iron pipe and ductile iron pipe;Flexible waterproof bushings: A and B, A used in the internal walls of buildings, B used in the exterior walls of buildings.In use:
Q:Seamless steel pipe and welded pipe what is the difference?
Seamless steel pipe is made of solid round tubes and perforated without gaps. The welded pipe is made of steel or strip after welding and has a slit. Generally seamless pipe can be greater pressure on the city.
Q:What is the theoretical weight per square meter of the steel pipe diameter of the outer frame and the thickness of the tube wall 3mm 48mm?
The outer steel tube diameter is 48mm, the tube wall thickness is 3mm, the theoretical weight per meter is 3.3291kgCalculation formula: (outside diameter wall thickness) * wall thickness *0.02466(48-3) *3*0.02466=3.3291kg
Q:What does "spiral welded steel pipe" DN325*10 mean?
Labeling is wrong: it should be said for 325*10, the diameter of pipe wall thickness of 10, 325;For example, the nominal diameter shall be: DN300.
Q:What is the difference between the stainless steel pipe welded pipe and seamless pipe?
Seamless tube is a strip of steel with a hollow cross section and no seams at all. The general is rolled into a cylindrical tube plate welding.
Q:Is there any difference between thermal expansion seamless steel pipe and seamless steel pipe?
Seamless tubes are generally produced on continuous tube mills, also known as automatic rolling mills. The round steel is cut into the required length, centering on the end face of the pipe blank and then sent to the heating furnace to punch on the piercer. At the same time, the hole rotates and advances continuously. Under the action of the roller and the plug, the inner cavity of the pipe blank is gradually formed, and the cavity is called the capillary. Sent to the automatic tube rolling mill on rolling. Finally, the thickness of the whole machine is the same, and the diameter of the sizing machine is determined to meet the specifications.
Q:Where is the difference between seamless steel pipe and welded pipe
Seamless pipe pressure is higher, welded pipe is generally in 10 or so MPa, now welded pipe to do seamless processing.
Q:What does "steel pipe SC" mean?
SC (run in welded steel duitconSC is the line laying mode GB letter of wire is worn steel pipe laying (welded steel pipe, low pressure fluid) SC70 said the conductor by low pressure fluid DN70 welded steel pipe as protection pipe laying, DN70 said the nominal pipe diameter is 70mm, the nominal pipe diameter is 70mm (a series of values, the actual diameter slightly different).
Q:How seamless steel tube is formed?
Hot drawing or cold drawing. The so-called cold is the billet from the thick wall tube is not heated, oil lubrication, with a steel sleeve inside, gradually elongated. Hot drawing is to make the billet tube red, do such work, generally thick wall applicable.

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