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Centrifugal Casting Tube

The main parts of the radiant section of ethylene cracking furnace include centrifugal casting tube, centrifugal casting bent tube, static casting tube, forgings and rolled pipe etc.         Manufacturing standards:         1. The design requirements of the customer and engineering company.         2.Centrifugal casting: HG/T 2601, A608 DIN, ASTM 10295, G5122 JIS...         3.Static casting: HG/T 3673, A351 ASTM...         4.Forging: according to the engineering requirement         5.Rolled pipe: according to the engineering requirement         Materials: heat resistant alloys of various grades, such as:         ZG40Cr25Ni35Nb,ZG40Cr35Ni45Nb,HP-Nb,GX40NiCrSiNb35-26, HT50,GX40NiCrNb45-35, SCH24XNb, etc.
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Application

Tubularcracking furnace is the main way to produce ethylene . Ethylene cracking furnace mainly includes: heating system, heat recovery system, reaction system.
The furnace includes: burner, radiant section, convection section and quench system, and high pressure steam system. The cracking furnace tube is used in the radiation section, also known as the radiant section furnace tube. ...


Although operating at relatively low pressure, the radiant coils in an ethylene furnace operate under extremely severe conditions of temperature and stress. In order to achieve the required process temperature inside the outside temperature can be between 950 and 1100oC depending on the degree of coking produced on the inner surface. In addition the tube temperature must be reduced for de-coking, sometimes in a period of every 30 days, creating additional stress from the inflexible coke layer which may involve stretching and bulging. Carburization of the tubes causes progressive embrittlement over time eventually reducing the life of the tubes.

We  have alloys to minimize these effects on the process operation. Depending on the furnace design, we can produce a range of tube diameters we also produce cast return bends, wye, tee and tetra fittings and induction bend and offset tubes. We can also produce transfer line castings and connection pieces.


Manufacturing capacity

The main parts of the radiant section of ethylene cracking furnace include centrifugal casting tube, centrifugal casting bent tube, static casting tube, forgings and rolled pipe etc.

       Manufacturing standards:

       1. The design requirements of the customer and engineering company.

       2.Centrifugal casting: HG/T 2601, A608 DIN, ASTM 10295, G5122 JIS...

       3.Static casting: HG/T 3673, A351 ASTM...

       4.Forging: according to the engineering requirement

       5.Rolled pipe: according to the engineering requirement

       Materials: heat resistant alloys of various grades, such as:

       ZG40Cr25Ni35Nb,ZG40Cr35Ni45Nb,HP-Nb,GX40NiCrSiNb35-26, HT50,GX40NiCrNb45-35, SCH24XNb, etc.


We can produce furnace tubes for a 1-million-ton ethylene cracking furnace per month.

Manufacturing process: centrifugal casting, sand casting, precision casting.
Specification:
Furnace tube: O.D.:50MM-200MM, wall thickness: 5mm-20mm;
Manifold: O.D.:100mm-400mm, wall thickness:10mm-40mm;
Centrifugal casting bent tube: to drawings.
Static casting:90°elbow, 180°elbow, Tee, hand type tube, special-shaped three-dimensional elbow, hanger etc..

Equipments:

10 medium frequency induction furnace,

1 electric arc furnace;

8 special centrifuge machine;

2 surface cleaning machine;

9 special boring machine,

2 CNC pipe welding bevel equipment;

2 special static casting mechanical processing equipment;

6 special welding production lines.


MATERIAL

Tensile Strength

Yield Strength

Elongation A (%)

Mpa

Mpa

Tube(Lo=5do)

Pipe Fittings

20Cr-32Ni-Nb

≥448 MPa

≥186 MPa

≥25

≥20

25Cr-35Ni+Nb+MA

≥450 MPa

≥240 MPa

≥8

≥6

35Cr-45Ni+Nb+MA

≥440 MPa

≥235 MPa

≥5

≥3

MATERIAL

Temperature

Constant stress

Minimum break time

Mpa

Hrs

20Cr-32Ni-Nb

900

40

100

25Cr-35Ni+Nb+MA

1100

17

100

35Cr-45Ni+Nb+MA

1100

16

100


Safety Packing suitable  long distance transporations 

WechatIMG21WechatIMG207




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