Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

what is 15CrMoG seamless steel pipe ?


       15CrMoG seamless steel pipe

       First, what is 15CrMoG material?

        Wrong wording: 15GrMoG

       15CrMoG ( correct reading: 15 chromium molybdenum pot ) is GB5310-95 steel ( equivalent to the Federal Republic of Germany 13CrMo44; corresponding to the world widely used 1Cr-1 / 2Mo and 1 1 / 4Cr-1 / 2Mo-Si steel ), Its chromium content higher than 12CrMo steel, so in the 500-550 ℃ high thermal strength. When the temperature exceeds 550 ° C, its thermal strength is significantly reduced when it is 500-550 ° C long-term operation, does not produce graphitization, but will produce carbide ball and redistribution of alloying elements, which lead to the heat of the steel Strong reduction, steel at 450 ℃ anti-relaxation performance is good. Its pipe and welding process performance is good.

    Maximum operating temperature : applied to high and medium pressure boiler steam pipes with steam parameter of 510 ℃ in power station, header and superheater tubes with wall temperature of 540 ℃, forgings and elastic elements.   

       Executive Standard:

       GB 5310-2008 Seamless steel tubes for high pressure boilers

      Second, 15CrMoG chemical composition

 

Steel number C Si Mn Cr
15CrMoG 0.12 ~ 0.18 0.17 ~ 0.37 0.40 ~ 0.70 0.80 ~ 1.10
Mo P S  
0.40 ~ 0.55 ≤ 0.025 ≤ 0.015  

      Third, 15CrMoG mechanical properties

Steel number Tensile strength (MPa) Yield strength (MPa) Elongation(%) hardness
15CrMoG 440 ~ 640 ≥295 ≥21 ---

       Fourth, 15CrMoG steel heat treatment system

 

Steel number Heat treatment type
15CrMoG Normalizing and tempering: normalizing temperature 900 ℃ ~ 960 ℃;tempering temperature of 680 ~ 720 ℃

 Note: When the hot-rolled steel finishing temperature in line with the provisions of the normalizing temperature, hot-rolled can be used instead of normalizing.

      Fifth, 15CrMoG welding materials selection principle

       Manual welding using E5515-B2 (hot 307) electrode.

      Gas welding with H12CrMo or H15CrMo wire, automatic welding with H15CrMo wire and flux 250 .

       Sixth , 300,000 units of materials used parts specifications table

Schedule 1: The main structure of the heating surface data

Part Name

Pipe specifications

Pipe material

Tube screen number

Furnace water wall

Φ63.5 × 7.5 (with female pipe)

SA-210C

 

Full screen superheater

Φ51 × 7

12Cr1MoVG, SA-213T91

6 × 4

Screen superheater

Φ60 × 9, Φ54 × 8.5

12Cr1MoVG, SA-213T91, SA-213TP347H

18

High temperature superheater

Φ54 × 7.5, Φ54 × 9, Φ51 × 8, Φ51 × 9, Φ54 × 11

12Cr1MoVG, SA-213T91, SA-213TP347H, SA-213TP304H, SA-213T22

27

Low temperature superheater

Φ51 × 6

SA-210C, 15Mo3

15CrMoG,

98

Roof superheater

Φ48.5 × 6

15CrMoG

 

Wall overheating

Φ51 × 6, Φ51 × 7,

Φ60 × 11

SA-210C

 

Low temperature reheater

Φ60 × 5, Φ60 × 4, Φ63.5 × 6

SA-210C, 15CrMoG, 12Cr1MoVG

98

High temperature reheater

Φ60 × 4, Φ60 × 5

12Cr1MoVG, SA-213T91, SA-213TP304H, SA-213T22

54

Economizer

Φ51 × 6

SA-210C

105

Schedule 2: reheater system header specifications

Serial number

Name

material

specification

1

Low temperature reheater import header

20G

φ558.8 × 30

2

Low temperature reheater outlet header

12Cr1MoVG

φ508 × 20

3

High temperature reheater import header

12Cr1MoVG

φ508 × 20

4

High temperature reheater outlet header

12Cr1MoVG

φ711 × 40

5

Low to high then connect the tube

12Cr1MoVG

φ609.6 × 25

6

Reheater water desuperheater

12Cr1MoVG

φ609.6 × 25

Schedule III: Superheater system header and its connecting pipe

 

Serial number

Name

Specifications

Material

1

Ceiling superheater import header

φ273 × 45

20G

2

Ceiling superheater outlet header

φ355.6 × 60

20G

3

Side-wall wall header

φ355.6 × 60

20G

4

In the wall on the header

φ273 × 50

20G

5

Ring header (side)

φ355.6 × 60

20G

6

Ring header (front)

φ355.6 × 60

20G

7

In the wall under the box

φ355.6 × 60

20G

8

After the package under the wall box

φ355.6 × 60

20G

9

Lower than the import header

φ355.6 × 65

20G

10

Lower than the export header

φ406.4 × 50

12Cr1MoVG

11

Low to large screen connection tube

φ609.6 × 55

12Cr1MoVG

12

Superheater a desuperheater

φ609.6 × 55

12Cr1MoVG

13

Big screen import header

φ323.9 × 40

12Cr1MoVG

14

Big screen export header

φ368 × 45

12Cr1MoVG

15

Superheater secondary desuperheater

φ426 × 50

12Cr1MoVG

16

After the screen import header

φ323.9 × 40

12Cr1MoVG

17

Rear screen exit header

φ355.6 × 50

12Cr1MoVG

18

Superheater three desuperheater

φ406.4 × 50

12Cr1MoVG

19

Higher than the import header

φ355.6 × 50

12Cr1MoVG

20

Higher than the export header

φ609.6 × 110

12Cr1MoVG

twenty one

Saturated steam leads to the tube

φ159 × 18

20G

twenty two

Bypass pipe

φ159 × 18

20G

twenty three

After the shaft to the wall after the wall to connect the pipe

φ159 × 20

20G

 

1475039420.jpg

Supercritical unit water wall material selection recommendations

1, boiler design outlet temperature ≤ 570 ℃, optional 12CrMoG, 15CrMoG, 12Cr1MoVG and similar to their steel pipe as a water wall steel.

2, the boiler outlet temperature design ≤ 600 ℃, optional 12Cr1MoVG, T23, T24 steel pipe as water wall steel.

3, the boiler design outlet temperature ≤ 620 ℃, optional T23, T24 steel pipe as water wall steel.

Shanghai Boiler Plant introduced Siemens boiler manufacturing technology, is currently being manufactured ultra-supercritical boiler water wall steel: SA209-T1, SA213-T12, SA213-T23; Harbin Boiler Factory introduced Japan's Mitsubishi boiler manufacturing technology, is currently being manufactured Ultra-supercritical boiler water wall steel: 15CrMoG; Dongfang Boiler Factory introduced Japan's Hitachi boiler manufacturing technology, is currently being manufactured ultra-supercritical boiler water wall steel: SA213-T12, SA213-T2, SA213-T22; Beijing Babcock is currently manufacturing ultra-supercritical boiler water wall steel: SA213-T12, 15CrMoG.

 Related high pressure boiler seamless steel pipe product recommendation:

20G high-pressure seamless pipe

20G

 

SA-213TP347H alloy steel pipe

SA-210C

12Cr1MoVG high-pressure seamless pipe

12Cr1MoVG

15CrMoG high pressure seamless pipe

SA-213T91

SA-213TP304H alloy steel pipe

SA-213TP304H

SA-213T91 international standard boiler tube

SA-213TP347H

SA-213T22 international standard boiler tube

SA-213T22

1456276226989445.jpg

12Cr2MoWVTiB

1453432283_ 副本 .jpg

09CrCuSb

 

10CrMo910

 

 


上一篇:Introduction to standard of API Steel pipe standard classific

下一篇:What are the production characteristics of stainless steel se

 Copyright ©2012 New SindaIf you do not find the information you need, Click Here  Get Support

New Update Pipe List

    ASTM Seamless pipe Size deviatio,ASTM Seamless Tube Size
    ASTM Seamless steel pipe Size deviatio,1) Sizes (O. D. X T): 8mm x 1mm to 114mm x 10mm 2) Standards: GB/T8163, ASTM A53, ASTM A106, API5L 3) Grade: A, B.

    API 5L Line Pipes X42
    API 5L Line Pipes X42,API 5L: A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80 API 5CT: J55 K 55 M65 N80 L 80 C 90 T 95 P110 H40 Q125 CS-90 SCS-95 SCS-80 TCS-110T .

    HEBEI NEWSINDA SEAMLESS STEEL PIPES
    NEWSINDA SEAMLESS STEEL PIPES Products:Boiler and Heat Exchanger TubesPressure Tubes and Line PipeMechanical TubesAutomotive TubesHollows for redraw.

    sch160 carbon steel seamless pipe
    sch160 carbon steel seamless pipe,1.carbon steel seamless pipeGR.A,GR.1,GR.6,GR.7,GR.3, 1/4"-28"*SCH20\30\STD\60\80\100\12013.7-711.2mm-40°C-101°C low temperature working use seamless steel pipes .
Contact Us Online To Serve You Better

Hot Click PRO