feadáin cruach gan uaim tSín do choirí ardbhrú i GB / T5310-2017 caighdeánach Monaróir agus Soláthraí | Óir Sanon
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feadáin cruach gan uaim do choirí ardbhrú i GB / T5310-2017 caighdeánach

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High-quality carbon structural steel, alloy structural steel, and stainless heat-resistant steel seamless steel pipe for high-pressure and above steam boiler pipes in GB/T5310-2007 standard. Material mainly is Cr-Mo alloy and Mn Alloy, Such as 20G, 20MnG, 20MoG, 12CrMoG, etc


  • Payment: 30% deposit, 70% L/C or B/L copy or 100% L/C at sight
  • Min.Order Quantity: 1 PC
  • Supply Ability: Annual 20000 Tons Inventory of Steel Pipe
  • Lead Time: 7-14 days if in stock, 30-45 days to produce
  • Packing: Black Vanishing, bevel and cap for every single pipe; OD below 219mm need to pack in bundle, and each bundle no exceed 2 tons.
  • Sonraigh Táirge

    CC

    Táirge Clibeanna

    Forbhreathnú

    Caighdeán: GB / T5310-2017

    Grúpa Grád: 20g, 20MnG, 25MnG, srl

    Tiús: 1 - 100 mm

    Outer Diameter(Round): 10 - 1200 mm

    Length: Fixed length or random length(6-12m)

    Rannóg Cruth: Babhta

    Cuir Origin: An tSín

    Deimhniúchán: ISO9001: 2008

     

    Alloy Nó Gan: Alloy

    Feidhmchlár: Coire Pipe

    Dromchla Cóireála: Mar riachtanas an chustaiméara

    Teicníocht: Te Iarchurtha

    Teas chóireáil: Annealing / normalú

    Special Pipe: Boiler Pipe

    Úsáid: Coire agus malartóir teasa

    Test: ECT/UT/Hydrau Static

    Iarratais

    Tá sé a úsáidtear go príomha chun cruach struchtúracha carbóin ard-chaighdeán, cóimhiotail cruach struchtúracha agus píobáin déanta as cruach gan uaim cruach teas-resistant dhosmálta do brú ard agus os a chionn píopaí coire gaile.

    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.

    príomh Grád

    Grád as cruach struchtúracha carbóin ard-chaighdeán: 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

    Comhpháirt Chemical

    Grád

    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

    0015

    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 0020 0.11

    0.20

    0.20

    0.80

    0.80

    0.20

    0.015

    0.30

    0.005

    0.015

    D 0.025 0015
    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

    Maoin Meicniúil

    Níl

              Grade

                                     Mechanical Property

     

     

    teanntachta
    MPa

    Toradh
    MPa

    Leathnú
    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

    Fad:

    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%.

    tástáil Riachtanas

    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.

    Sonraigh Táirge


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