904L Super Duplex Stainless Steel Pipe in Wuxi ,China

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2 m.t.
Supply Capability:
25000 m.t./month

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Item specifice:

Standard: AISI Technique: Cold Drawn Shape: Round
Surface Treatment: Polished Steel Grade: 200 Series,300 Series Certification: ISO
Thickness: 1.8 Length: 2000 Outer Diameter: 12
Net Weight: 15

Product Description:


Own Brand Name


Business Type


standard specifications



Product Range

Stainless steel seamless 

pipes and tubes

Export Percentage


Export Markets

Middle east, 

south and east Asia, 

Russia, South America

Sales Volume



Primary Competitive 


High quality,

Favourite price; 

Prompt Delivery

No. of Production Lines


Investment on 




NO.of R&D Staff


NO.of Total Staff


Annual production



No. of Engineers


Year Established


Monthly Capacity

1200 tons

Pipe Billet


Factory Size in 

Square Meters

33333 SQ.M 




Current Principal 


sinopec, CNPC, nuclear plant

Type of Machinery

cold drawn machine,

 cold rolling equipment,

broaching machine,

automatic solution 

annealing furnaces,


test equipment






904L is a fully austenitic structure, and the general content of high molybdenum austenitic stainless steel, 904L is not sensitive to the precipitation of the ferrite and the alpha phase.




1. petroleum, petrochemical equipment, such as petrochemical equipment in the reactor, etc..


2. Storage and transportation equipment, such as heat exchangers, etc..


3. Power plant flue gas desulfurization device, the main use of the site are: absorption tower body,           flue, file door, interior, spray system, etc..


4. Organic acid treatment system of scrubber and fan.


5. Seawater treatment plant, sea water heat exchanger, paper industry equipment, sulfuric acid, nitric     acid equipment, acid, pharmaceutical industry and other chemical equipment, pressure vessels,         food equipment.


6 .Pharmaceutical factory: centrifuge, reactor, etc..


7. Plant food: cans of soy sauce, cooking wine, salt, and dressing equipment.


8.  Most suitable for dilute sulfuric acid and strong corrosive medium


Surface Finish :


904L Super Duplex Stainless Steel Pipe in Wuxi ,China

904L Super Duplex Stainless Steel Pipe in Wuxi ,China


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Q:Classification, advantages and disadvantages of stainless steel welding
The arc is produced between the tungsten welding wire and the workpiece, so the protection gas is pure argon and the welding wire is not charged, so it can be sent by hand or by machine. Then it is whether to use direct current or alternating current, depending on the welding material.
Q:About stainless steel welding deformation
In fact, the deformation of stainless steel and carbon steel caused little difference, but the deformation is greater than carbon steel, the treatment method is the same.(1) using smaller welding rod and smaller current.(2) correcting welding sequence;(3) before welding, clamp the weldment to avoid warping.(4) avoid excessive cooling or preheating of base metal.(5) the welding penetration is low.(6) reduce weld gap and reduce slotting degree.(7) pay attention to the welding size, not to make the welding bead too big.(8) pay attention to the fixed measures to prevent deformation.
Q:Where is the difference between seamless steel pipe or welded pipe?
Seamless steel tube is formed during rolling. Welded steel pipes need to be welded after coiling, and spiral welding and direct welding are generally used. Seamless performance is better, of course, the price is higher.
Q:In stainless steel tubes, why are there some SS in the back and some standard L, such as 316L and 316SS? What's the difference?
316SS carbon content is higher than 316L (with L indicating ultra low carbon, corrosion resistance of chloride ion, improve its resistance to intergranular corrosion and oxide stress corrosion resistance), mechanical properties,.316SS strength higher than 316L316L is the steel that continues to reduce carbon content on the basis of 316316L is more resistant to corrosion due to its low carbon content
Q:Stainless steel pipe welding interface leakage, how can we not leak?
After each layer of welding, it is necessary to check the defects, and never attempt to eliminate the defects with fusion welding. The defects must be polished, removed and repaired;
Q:What's the difference between stainless steel pipe or stainless steel composite pipe?
Stainless steel tube, the whole pipe is stainless steel lighter, bearing capacity, there is no composite pipe, but it is not easy to embroider,
Q:Why can it stainless steel be put together with carbon steel tube?
Electrolyte: the contact area of two metals is covered with electrolyte or submerged. The iron in the carbon tube loses electrons to form ions into the solution, and the electrons on the surface of the stainless steel tubes are taken away by the corrosive agents in the electrolyte (such as oxygen in the air). Electrolytes become ionic channels.
Q:What's the difference between the stainless steel pipe welded pipe and seamless pipe?
Grain size: usually, the grain size of the metal is related to the heat treatment temperature and the time at which the metal is kept at the same temperature. Therefore, the welded pipe and seamless tube annealing of the same grain size. If the minimum tube cold treatment, the grain size of the weld metal is smaller than the grain size, welding or grain size is the same.
Q:Is food grade stainless steel GB9684 304?
You can't say that.GB9684 is the implementation of standards, 304 is a material of stainless steel, stainless steel material is very much, such as 304321316347310s, 904L and so on, as long as the material of stainless steel in accordance with GB9684 standards of production and processing, can be used as a food grade stainless steel, it should be said that in accordance with the implementation of the standard GB9684 production and processing of food grade stainless steel is 304.
Q:What are the specifications of stainless steel decorative pipes?
Decorative tubes, then more specifications. Our factory has the smallest 9.5MM, the largest to see how big you can, directly with the industrial pipe to polish it

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