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Hot Dipped Galvanized Steel Pipe - Seamless steel tubes for high-pressure boilers in GB/T5310-2017 Standard – Gold Sanon

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Hot Dipped Galvanized Steel Pipe - Seamless steel tubes for high-pressure boilers in GB/T5310-2017 Standard – Gold Sanon Detail:

Overview

Application

It is mainly used to make high-quality carbon structural steel, alloy structural steel and stainless heat-resistant steel seamless steel pipes for high pressure and above steam boiler pipes.

Mainly used for high pressure and high temperature service of boiler(Superheater tube, reheater tube, air guide tube, main steam tube for high and ultra high pressure boilers). Under the action of high temperature flue gas and water vapor, the tube will oxidize and corrode. It is required that the steel pipe has high durability, high resistance to oxidation and corrosion, and good structural stability.

Main Grade

Grade of high-quality carbon structural steel: 20g、20mng、25mng

Grade of alloy structural steel: 15mog、20mog、12crmog、15crmog、12cr2mog、12crmovg、12cr3movsitib, etc

Grade of rust-resistant heat-resistant steel: 1cr18ni9     1cr18ni11nb

Chemical Component

Grade

Quality

Class

Chemical Property

C

Si

Mn

P

S

Nb

V

Ti

Cr

Ni

Cu

Nd

Mo

B

Als”

不大于

不小于

Q345 A

0.20

0.50

1.70

0.035 0.035

0.30

0.50

0.20

0.012

0.10

B 0.035 0.035
C 0.030 0.030

0.07

0.15

0.20

0.015

D

0.18

0.030 0.025
E 0.025 0.020
Q390 A

0.20

0.50

1.70

0.035 0.035

0.07

0.20

0.20

0.3。

0.50

0.20

0.015

0.10

B 0.035 0.035
C 0.030 0.030

0,015

D 0.030 0.025
E 0.025 0.020
Q42O A

0.20

0.50

1.70

0.035 0.035

0.07

0.2。

0.20

0.30

0.80

0.20

0.015

0.20

B 0.035 0.035
C 0.030 0.030

0.015

D 0.030 0.025
E 0.025 0.020
Q46O C

0.20

0.60

1.80

0.030 0.030

0.11

0.20

0.20

0.30

0.80

0.20

0.015

0.20

0.005

0.015

D 0.030 0.025
E 0.025 0.020
Q500 C

0.18

0.60

1.80

0.025 0.020

0.11

0.20

0.20

0.60

0.80

0.20

0.015

0.20

0.005

0.015

D 0.025 0.015
E 0.020 0.010
Q550 C

0.18

0.60

2.00

0.025 0,020 0.11

0.20

0.20

0.80

0.80

0.20

0.015

0.30

0.005

0.015

D 0.025 0,015
E 0.020 0.010
Q62O C

0.18

0.60

2.00

0.025 0.020

0.11

0.20

0.20

1.00

0.80

0.20

0.015

0.30

0.005

0.015

D 0.025 0.015
E 0.020 0.010
Except for Q345A and Q345B grades, the steel should contain at least one of the refined grain elements Al, Nb, V, and Ti. According to the needs, the supplier can add one or more refined grain elements, the maximum value Should meet the requirements in the table. When combined, Nb + V + Ti <0.22% °For Q345, Q390, Q420 and Q46O grades, Mo + Cr <0.30% oWhen each grade of Cr and Ni is used as the residual element, the content of Cr and Ni should not be more than 0.30%; when it needs to be added, its content should meet the requirements in the table or be determined by the supplier and the buyer through consultation.

J If the supplier can guarantee that the nitrogen content meets the requirements in the table, the nitrogen content analysis may not be performed. If Al, Nb, V, Ti and other alloy elements with nitrogen fixation are added to the steel, the nitrogen content is not limited. The nitrogen fixation content should be specified in the quality certificate.

‘When using all aluminum, the total aluminum content AIt ^ 0.020% B

Mechanical Property

No

          Grade

                                 Mechanical Property

 

 

Tensile
MPa

Yield
MPa

Extend
L/T

Impect (J)
Vertical/ Horizontal

Handness
HB

1

20G

410-
550


245

24/22%

40/27

2

20MnG

415-
560


240

22/20%

40/27

3

25MnG

485-
640


275

20/18%

40/27

4

15MoG

450-
600


270

22/20%

40/27

6

12CrMoG

410-
560


205

21/19%

40/27

7

15CrMoG

440-
640


295

21/19%

40/27

8

12Cr2MoG

450-
600


280

22/20%

40/27

9

12Cr1MoVG

470-
640


255

21/19%

40/27

10

12Cr2MoWVTiB

540-
735


345

18/-%

40/-

11

10Cr9Mo1VNbN


585


415

20/16%

40/27


250

12

10Cr9MoW2VNbBN


620


440

20/16%

40/27


250

Tolerance

Wall Thickness and Outter Diameter:

If there is no special requirements, pipe gonna be delivery as  norminal outter diameter and norminal wall thickness. As follow sheet

Classification designation

Method of manufacture

Size of pipe

Tolerance

Normal grade

High grade

W H

Hot Rolled(extrude) pipe

Norminal outter Diameter

(D)

<57

士 0.40

±0,30

57 〜325

SW35

±0.75%D

±0.5%D

S>35

±1%D

±0.75%D

>325 〜6。。

+ 1%D or + 5.Take lesser one一2

>600

+ 1%D or + 7,Take lesser one一2

Norminal Wall Thickness

(S)

<4.0

±|・丨)

±0.35

>4.0-20

+ 12.5%S

±10%S

>20

DV219

±10%S

±7.5%S

心219

+ 12.5%S -10%S

10%S

W-H

Thermal expansion pipe

Norminal outter Diameter

(D)

all

±1%D

±0.75%。

Norminal Wall Thickness

(S)

all

+ 20%S

-10%S

+ 15%S

-io%s

W-C

Cold drawn(rolled)

Ppipe

Norminal outter Diameter

(D)

<25.4

±’L1j

>25.4 〜4()

±0.20

>40 〜50

|:0.25

>50 〜60

±0.30

>60

±0.5%D

Norminal Wall Thickness

(S)

<3.0

±0.3

±0.2

>3.0

S

±7.5%S

Length:

The usual length of steel pipes is 4 000 mm ~ 12 000 mm. After consultation between the supplier and the buyer, and fill in the contract, it can be delivered steel pipes with a length greater than 12 000 mm or shorter than I 000 mm but not shorter than 3 000 mm; short length The number of steel pipes less than 4,000 mm but not less than 3,000 mm shall not exceed 5% of the total number of steel pipes delivered

Delivery weight:
When the steel pipe is delivered according to the nominal outer diameter and nominal wall thickness or the nominal inner diameter and nominal wall thickness, the steel pipe is delivered according to the actual weight. It can also be delivered according to the theoretical weight.
When the steel pipe is delivered according to the nominal outer diameter and minimum wall thickness, the steel pipe is delivered according to the actual weight; the supply and demand parties negotiate. And it is indicated in the contract. The steel pipe can also be delivered according to the theoretical weight.

Weight tolerance:
According to the requirements of the purchaser, after consultation between the supplier and the purchaser, and in the contract, the deviation between the actual weight and the theoretical weight of the delivery steel pipe shall meet the following requirements:
a) Single steel pipe: ± 10%;
b) Each batch of steel pipes with a minimum size of 10 t: ± 7.5%.

Test Requirement

Hydraustatic Test:

The steel pipe should be tested hydraulically one by one. The maximum test pressure is 20 MPa. Under the test pressure, the stabilization time should be not less than 10 s, and the steel pipe should not leak.

After the user agrees, the hydraulic test can be replaced by eddy current testing or magnetic flux leakage testing.

Nondestructive Test:

Pipes that require more inspection should be ultrasonically inspected one by one. After the negotiation requires the consent of the party and is specified in the contract, other non-destructive testing can be added.

Flattening Test:

Tubes with an outer diameter greater than 22 mm shall be subjected to a flattening test. No visible delamination, white spots, or impurities should occur during the entire experiment.

Flaring Test:

 According to the requirements of the purchaser and stated in the contract, the steel pipe with outer diameter ≤76mm and wall thickness ≤8mm can be done flaring test . The experiment was performed at room temperature with a taper of 60 °. After the flaring, the flaring rate of the outer diameter should meet the requirements of the following table, and the test material must not show cracks or rips

Steel Type

 

 

Outter diameter flaring rate of steel pipe/%

Inner Diameter/Outter Diameter

<0.6

>0.6 〜0.8

>0.8

High-quality carbon structural steel

10

12

17

Structural alloy steel

8

10

15

•The inner diameter is calculated for the sample.

Product Detail

Seamless Steel Tubes For High-Pressure Boilers


1


GB/T5310-2017


A106 Boiler Pipe


ASME SA-106/SA-106M-2015


carbon steel pipe


ASTMA210(A210M)-2012


2


ASME SA-213/SA-213M


boiler pipe IBR


ASTM A335/A335M-2018


Product detail pictures:

Hot Dipped Galvanized Steel Pipe - Seamless steel tubes for high-pressure boilers in GB/T5310-2017 Standard – Gold Sanon detail pictures

Hot Dipped Galvanized Steel Pipe - Seamless steel tubes for high-pressure boilers in GB/T5310-2017 Standard – Gold Sanon detail pictures

Hot Dipped Galvanized Steel Pipe - Seamless steel tubes for high-pressure boilers in GB/T5310-2017 Standard – Gold Sanon detail pictures


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