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Standard&Tailormade Stainless Steel Solution


Product Detailed Location:Home>>Products>>Applications&S... > Prodct Detailed

Petroleum and Petrochemical Industry


Petroleum and petrochemical industry

1.Stainless steel used in petroleum refining equipment.
The stainless steel is used in petroleum refining equipments, whose main material brand is 0Cr13Al ferrite stainless steel; with the different resources of the petroleum, Cr-Ni austenite stainless steel is also used in some highly corrosive parts. The application status of stainless steel in the petroleum refining industry is shown in the following table:

The application of stainless steel in the petroleum refining industry

Name of the equipment

Material

Application position

The distillation tower of the normal pressure crude oil distillation equipments

0Cr13Al
Cr-Ni Austenite stainless steel

0Cr13Al is used in the tower top and the pallet, under the existence of chloride; stainless steel is used the Cr-Ni austenite

Decompression distillation equipment, 350-450, 1.3-2KPa

5CrMo
0Cr17Ni12Mo2

The 5CrMo Commonly used,when treating the normal pressure residue oil of naphthenic acid, the 0Cr17Ni12Mo2 is used in the upper part of the refining tower with the temperature of 250-300

The accelerant modification equipment 420-580

0Cr18Ni9

The high temperature exchanger at the outlet of the reaction tower

hydrogenation desulfurization device 200-500,3.4-196MPa

0Cr18Ni9
0Cr18Ni10Ti
0Cr18Ni11Nb
00Cr17Ni14Mo2
0Cr13Al

Reaction tower
Heating pipe, matching pipe, heat exchanging pipe. The pipes and panels of the tower use stainless steel bead welding
The downstream machining equipments for treating wet sulfureted hydrogen. 
The 0Cr13Al is used in the gasoline and kerosene equipments that contain less H2S

The accelerant decomposing equipment, 500, normal pressure

0Cr13Al
0Cr18Ni9

0Cr13Al or 0Cr18Ni9 is used in some parts on the decomposing tower

Hydrogen making equipments, absorption and regeneration tower

00Cr19Ni10

The pipeline that is carbon acid corrosion resistant

The grease equipment for solvent extraction: furan aldehyde

0Cr18Ni9

The heat exchanging pipe which is furan aldehyde corrosion resistant.

Waste water treatment equipment

0Cr18Ni9、0Cr17Ni14Mo2

Equipments on the distillation tower top

Sulfur reclaiming equipments (250)

0Cr13Al、0Cr18Ni9

The tower and the condenser


Introduction Details

The application of double phase stainless steel in the oil refining industry

Name of the equipment

Material

The application position and purpose

Ordinary decompressor

00Cr18Ni5Mo3Si2

Tower top liner, components inside the tower, normal top air cooler, top reducing wetting air cooler, core pipe of top reducing after-cold water cooler, liner of oil water separator. Solve the SCC problem

Catalyzing and cracking devices

00Cr18Ni5Mo3Si2

Liner of catalyzing and absorbing tower, tower panel, float valve, gasoline reheat machine. Solve the problem of carbon steel’s hydrogen induced cracking, and the uniform corrosion of the austenite stainless steel (1Cr18Ni9Ti)

Hydrogenation cracking devices

0Cr18Ni5Mo3Si2
2205

Air cooler, solve the corrosive pitting of 0Cr13 and 0Cr17, as well as the SCC problem of 18-8 type austenite stainless steel

Hydrogenation desulfidation devices

00Cr18Ni5Mo3Si2

Heat exchanger and water cooler, solve the SCC problem of the cyanide

Waste water treatment equipments

00Cr18Ni5Mo3Si2

The heat exchanger and the pot top condenser of the DEA washing device, solve the corrosion pitting of Cr17. And the SCC problem of 00Cr17Ni12Mo2


2.The stainless steel for petrochemical industry

Regarding the waste gas of the petroleum refining factory, natural gas or naphtha as the raw material, through a series of chemistry reaction, it can produce ethylene, propylene, ethyne, etc., a further synthesizing can produce polythene, polystyrene, acetone, butadiene, etc. The machining process after the synthesizing is similar to the chemical industry, and will contact various acidity mediums, the serving environment is very severe, and the variation scale for the medium condition is large, and the materials in use are wide, they involve stainless steel, iron-nickel base anti-corrosion alloy, and nickel base anti-corrosion alloy.

(1) Ethylene production.
0Cr25Ni20 or high carbon 0Cr25Ni20 centrifugal casting pipe is used in the furnace tube of the thermal decomposition furnace, which is a choice made according to the high temperature and high creep rupture strength. Incolog800 alloy is adopted in the pipeline. Under the low temperature condition, low temperature steel should be used, and the 0Cr18Ni9 is used only under the condition of -100--175
.

(1) Ethyne 
In the production of ethyne, as the decomposing temperature is above 1100
, the alloy brand in use is higher than the one used in producing ethylene.

(3) Other treating process
Other treating processes including oxidation, hydration, dehydrogenation, dehydration, alkylation, anisotropisation ect. The equipments will contact the relevant acidity mediums, and the materials in use are mainly 0Cr17Ni14Mo2 and 00Cr17Ni14Mo2
,Inconel600、Incoloy800,No.20 alloy and Hastelloy B、C、D, etc. The process conditions of work are shown in the table below. In the process of petroleum chemical engineering, sulfuric acid, hydrofluoric acid, phosphoric acid, hydrochloric acid and other corrosive mediums need to be used in some processes. According to the acid concentration, different corrosion resistant materials are used with the different temperature.

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