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Brand Name : DELTA
Model Number : 304 316L
Certification : ISO
Place of Origin : China
MOQ : 500 kgs
Price : 3480- 4000 USD/Ton
Payment Terms : T/T, Western Union, L/C
Supply Ability : 10 Ton per week
Delivery Time : 5 - 12 days based on the quantity
Packaging Details : standard packing for export
Products : Stainless Steel Pipe
Grade : Stainless Steel 304 316L
Standard : ASTM GB EN
Length : 6m or custom cutting any length as request
Diameter : DN10 - DN400
Wall thickness : SCH10 - XXS or unstandard size
Type : seamless pipe
Service : cutting, polishing
application : Heat exchanger
Packing : wooden box or PP bag
Bright (BA grade) Stainless Steel Tube Annealing TP304 TP316L Pipe ASTM A269
Products Name | 304 Stainless Steel Pipe |
Pipe Type | Seamless Pipe . Welded Pipe |
Surface | Pickling , polishing |
Out Diameter | 6 - 508mm |
Wall Thickness | 1.0 - 50.0mm |
Length | 6m or cutting any length as request |
Standard | ASTM / GB / EN / DIN / JIS / BS / BIS |
Mainly Grade | 304 304L 304H 309S 310S 316L 316Ti 317L 321 347 2205 2507 904L 254SMO 800/800H Alloy20 ,Hastelloy Alloy, Monel Alloy,Inconel Alloy |
Service | Cutting, Polishing, Hairline Finishing |
MOQ | 200 Kgs |
Packing | standard packing for export |
Application | Industrial , food , medical, househould |
Bright annealing tube under a reducing atmosphere or in a vacuum protection, after high temperature solid melting and rapid cooling to get the stainless steel tube, requiring the inner surface has a very good surface roughness and cleanliness, is a comprehensive consideration of organizational stability corrosion resistance and workability of the pipe.
Bright annealed tube inner surface roughness Ra values and their own cleanliness is extremely demanding, so the particles can occur during transport and accumulation of fluid retention has been effectively curbed. In addition, the chemical composition of the pipe and the base material dimensional tolerances need to be strictly controlled to ensure the weldability of steel and the welding quality in the welding fumes, which can reduce the occurrence of particle generation and improving the corrosion resistance of welded parts, and smoothness.
Bright annealed stainless steel welded pipe is widely used in making military products, semiconductor, biological medicine, precision instruments and meters, hydraulic parts and many other industrial products.
Bright annealing is an annealing process performed in a vacuum or a controlled atmosphere containing inert gases (such as hydrogen). This controlled atmosphere reduces the surface oxidation to a minimum which results in a brighter surface and a much thinner oxide layer. Pickling is not needed after bright annealing since the oxidation is minimal. Since there is no pickling, the surface is much smoother which results in better resistance to pitting corrosion.
The material of the stainless steel round bar is from Jiuli and Baosteel China, we control the quality from the very start. We polished three times to make sure the surface is perfect bright and smooth, and without any deficiency in quality.
The Bright Annealing Tube System can either be placed standalone or in-line with surface reduction equipment to create a total in-line process. Innovative design allows for easy changeover from product to product, and each system is equipped with automatic power control and precision temperature control through recipe parameters.
Bright annealing (BA) refers to stainless steel material is heated in closed furnace in reducing atmosphere of inert gases, common Hydrogen gas, after fast annealing, rapid cooling, stainless steel has a protective layer on the outer surface, no reflect in open air environment, this layer can resist corrosion attack. In general, material surface is more smooth and brighter.
Tube is processed in bright annealing finish, in this process, some factors are important for quality tube, if bright annealing process is not proper, that will result in crack, then may corrosion.
Before Bright Annealing
The surface of the tube must be clean, no other foreign matter, any matter left on the tubing surface can cause damage during the process.
Inserted Gas
Annealing atmosphere should be free from Oxygen, isolating material, creating a vacuum condition. Inserted gas, common dry hydrogen or argon, can obtain bright result.
Annealing Temperature
Annealing temperature should be noticed depending on different stainless grades, commonly Austenitic steels annealing temperature is at least 1040 degree, soak time is not important. high temperature must be required to have brighter appearance. Heating is done as fast as possible, slow heat results in oxidation.
Some Ferritic stainless steels require lower annealing temperature, such as TP439, cannot be effectively bright annealed, Water quenching will cause scale formation.
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Bright (BA grade) Stainless Steel Tube Annealing TP304 TP316L Pipe ASTM A269 Images |