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Product Name | Stainless steel Round pipe |
Standard | ASTM AISI DIN, EN, GB, JIS |
Steel Grade | 200 Series: 201,202 |
300 Series: 301,304,304L,316,316L,316Ti,317L,321,309s,310s | |
400 Series: 409L,410,410s,420j1,420j2,430,444,441,436 | |
Duplex Steel: 904L,2205,2507,2101,2520,2304 | |
Outer Diameter | 6-2500mm(as required) |
Thickness | 0.3mm-150mm (as required) |
Length | 2000mm/2500mm/3000mm/6000mm/12000mm(as required) |
Technique | Seamless |
Surface | No.1 2B BA 6K 8K Mirror No.4 HL |
Tolerance | ±1% |
Price Terms | FOB,CFR,CIF |
Main Application:
Stainless steel pipe is a kind of hollow long round steel, which is mainly used in industrial transportation pipelines such as petroleum, chemical industry, medical treatment, food, light industry, mechanical instrument, etc., as well as mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. Also commonly used as furniture and kitchenware, etc.
Note:
1. Free sampling, 100% after-sales quality assurance, Support any payment method;
2. All other specifications of round stainless steel pipes are available according to your requirement (OEM&ODM)! Factory price you will get from baosteelholdings group.
The chemical components of stainless steel pipe is summarized in the following table:
Stainless Steel Pipe Surface Finish
Through different processing methods of cold rolling and surface reprocessing after rolling, the surface finish of stainless steel pipes can be of different types.
The surface treatment of stainless steel pipes includes NO.1, 2B, No. 4, HL, No. 6, No. 8, BA, TR hard, re-rolled bright 2H, polished bright and other surface finishes.
NO.1: No. 1 surface refers to the surface obtained by heat treatment and pickling of stainless steel strip after hot rolling. It is to remove the black oxide scale produced during hot rolling and heat treatment by pickling or similar treatment. This is the No.1 finish. No.1 has a silver-white matte finish. Mainly used in heat-resistant and corrosion-resistant industries that do not require high surface gloss, such as alcohol industry, chemical industry, large containers, etc.
2B: The surface of the 2B is different from the 2D surface in that it is smoothed with a smooth roller, so it is brighter than the 2D surface. The surface roughness Ra value measured by the instrument is 0.1~0.5μm, which is the most common processing type. This stainless steel strip is the most widely used, suitable for general use, widely used in chemical, paper, petroleum, medical and other industries, and can also be used as building curtain wall.
No. 4: The surface of No. 4 is a fine polished surface finish that is brighter than the surface of No. 3. It is also base and polished by polishing the 2D or 2B surface stainless steel cold-rolled stainless steel plate to the abrasive belt with a grit of 150-180# machined surface. The surface roughness Ra value measured by the instrument is 0.2 to 1.5 μm. NO.4 surface is widely used in restaurant and kitchen equipment, medical equipment, architectural decoration, containers, etc.
HL: The HL surface is often referred to as the hairline finish. The Japanese JIS standard stipulates that a 150-240# abrasive belt is used to polish the surface of the obtained continuous hairline abrasive. In China's GB3280 standard, the regulations are rather vague. HL surface treatment is mostly used for architectural decoration such as elevators, escalators, and exterior walls.
No.6: On the basis of No.4 surface, the surface of No.6 is further polished with a Tampico brush or an abrasive material with a particle size of W63 specified in the GB2477 standard. This surface has good metallic luster and soft properties. Reflections are weak and do not reflect the image. Due to this good performance, it is very suitable for making building curtain wall and building edge decoration, also widely used as kitchen utensils.
BA: BA is the surface obtained by bright heat treatment after cold rolling. Bright heat treatment is annealed in a protective atmosphere to ensure that the surface is not oxidized to maintain the luster of the cold-rolled surface, and then smoothed with a high-precision smoothing roller to improve the surface brightness. The surface is close to mirror finish, and the surface roughness Ra value measured by the instrument is 0.05-0.1 μm. BA surface is versatile and can be used as kitchen utensils, household appliances, medical equipment, auto parts and decorations.
No.8: No.8 is a mirror polished surface with the highest reflectivity and no abrasive particles. The stainless steel deep processing industry is also called 8K plate. Generally speaking, BA materials are only used as raw materials for mirror finishing by grinding and polishing. After mirror treatment, the surface is artistic, so it is mostly used for building entrance decoration and interior decoration.
Process of production
1. Rolling, annealing
It is a metal heat treatment process in which the workpiece is heated to a predetermined temperature, and then slowly cooled after holding for a certain period of time. The purpose of annealing is to:
①Improve or eliminate various structural defects and residual stress caused by steel in the process of casting, forging, rolling and welding, and prevent deformation and cracking of the workpiece.
② soften the workpiece for cutting.
③ Refine the grain and improve the structure to improve the mechanical properties of the workpiece.
④ Prepare the organization for final heat treatment and pipe making
2. Articles
The slitting of stainless steel coils is to cut the stainless steel coils into corresponding widths for further deep processing and pipe making. During the slitting process, attention should be paid to the scratches of the slitting knife on the coils, the width and errors of the slits. In addition, the slitting is related to the pipe making process, and the cloak and burr of the slitting are very important for the pipe making process.
3. Welding
The most important process of stainless steel pipe, stainless steel mainly adopts argon arc welding and plasma welding, argon arc welding shielding gas is pure argon gas, mainly welding stainless steel pipes below 3mm, plasma welding has strong penetrating power, mainly welding 5- 8mm stainless steel tube.
4. Weld bead grinding
In the process of welding stainless steel pipe, it is necessary to perform corresponding polishing and water cooling treatment on the outer weld bead. After water cooling the weld bead, directly grind the weld bead with a water mill until it is flat. Generally, add 3-3 to the thickness of the stainless steel pipe. 5 sets of water mills for grinding and trimming of weld bead.
Five, plastic surgery
The process of stainless steel welded pipe is called extrusion production. All square and rectangular pipes are originally from round pipes. By producing round pipes with the same perimeter, they are then extruded into corresponding square and rectangular pipes. Mold shaping and straightening.
6. Cutting
The process of making and cutting stainless steel pipes is relatively rough. Most of them are cut with grinding discs. After cutting, a cloak will be produced, which needs to be further trimmed. In addition, a band saw is used for cutting, and the accuracy is relatively good. The pipe for the purpose needs to be brightly heat treated to make the ductility of the pipe reach a higher level.
Seven, polishing
The usual product pipes and decorative pipes have several techniques for surface treatment. Polishing is divided into 400#, 600#, 800#, while sandblasting is divided into round sand and straight sand, with 180#, 240#, 400# , 600#, 800#, respectively, are suitable for the needs of different levels of customers.
8. Inspection
The inspection mainly checks whether the outer diameter and thickness of the pipe meet the standard, whether the surface treatment meets the standard, and whether the welding process meets the standard.
Packing and Transportation
Packaging is generally naked, steel wire binding, very strong.
If you have special requirements, you can use rust proof packaging, and more beautiful.
Transportation: Express (Sample Delivery), Air, Rail, Land, Sea shipping (FCL or LCL or Bulk)
Our Company
FAQ
Q:Can I go to your company to visit?
A:Of course, we welcome customers from all over the world to visit our company.
Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.
Q:Does the product have quality inspection before loading?
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely.
Q:How about the delivery time?
A:Within 15-45 days after we confirm you requirement.
Q:What is your terms of payment ?
A:T/T, 100% L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me.
Q:How do we trust your company?
A:We consider honest as the life of our company, we can tell you the contact information of our some other clients for you to check our credit.
Product Name | Stainless steel Round pipe |
Standard | ASTM AISI DIN, EN, GB, JIS |
Steel Grade | 200 Series: 201,202 |
300 Series: 301,304,304L,316,316L,316Ti,317L,321,309s,310s | |
400 Series: 409L,410,410s,420j1,420j2,430,444,441,436 | |
Duplex Steel: 904L,2205,2507,2101,2520,2304 | |
Outer Diameter | 6-2500mm(as required) |
Thickness | 0.3mm-150mm (as required) |
Length | 2000mm/2500mm/3000mm/6000mm/12000mm(as required) |
Technique | Seamless |
Surface | No.1 2B BA 6K 8K Mirror No.4 HL |
Tolerance | ±1% |
Price Terms | FOB,CFR,CIF |
Main Application:
Stainless steel pipe is a kind of hollow long round steel, which is mainly used in industrial transportation pipelines such as petroleum, chemical industry, medical treatment, food, light industry, mechanical instrument, etc., as well as mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. Also commonly used as furniture and kitchenware, etc.
Note:
1. Free sampling, 100% after-sales quality assurance, Support any payment method;
2. All other specifications of round stainless steel pipes are available according to your requirement (OEM&ODM)! Factory price you will get from baosteelholdings group.
The chemical components of stainless steel pipe is summarized in the following table:
Stainless Steel Pipe Surface Finish
Through different processing methods of cold rolling and surface reprocessing after rolling, the surface finish of stainless steel pipes can be of different types.
The surface treatment of stainless steel pipes includes NO.1, 2B, No. 4, HL, No. 6, No. 8, BA, TR hard, re-rolled bright 2H, polished bright and other surface finishes.
NO.1: No. 1 surface refers to the surface obtained by heat treatment and pickling of stainless steel strip after hot rolling. It is to remove the black oxide scale produced during hot rolling and heat treatment by pickling or similar treatment. This is the No.1 finish. No.1 has a silver-white matte finish. Mainly used in heat-resistant and corrosion-resistant industries that do not require high surface gloss, such as alcohol industry, chemical industry, large containers, etc.
2B: The surface of the 2B is different from the 2D surface in that it is smoothed with a smooth roller, so it is brighter than the 2D surface. The surface roughness Ra value measured by the instrument is 0.1~0.5μm, which is the most common processing type. This stainless steel strip is the most widely used, suitable for general use, widely used in chemical, paper, petroleum, medical and other industries, and can also be used as building curtain wall.
No. 4: The surface of No. 4 is a fine polished surface finish that is brighter than the surface of No. 3. It is also base and polished by polishing the 2D or 2B surface stainless steel cold-rolled stainless steel plate to the abrasive belt with a grit of 150-180# machined surface. The surface roughness Ra value measured by the instrument is 0.2 to 1.5 μm. NO.4 surface is widely used in restaurant and kitchen equipment, medical equipment, architectural decoration, containers, etc.
HL: The HL surface is often referred to as the hairline finish. The Japanese JIS standard stipulates that a 150-240# abrasive belt is used to polish the surface of the obtained continuous hairline abrasive. In China's GB3280 standard, the regulations are rather vague. HL surface treatment is mostly used for architectural decoration such as elevators, escalators, and exterior walls.
No.6: On the basis of No.4 surface, the surface of No.6 is further polished with a Tampico brush or an abrasive material with a particle size of W63 specified in the GB2477 standard. This surface has good metallic luster and soft properties. Reflections are weak and do not reflect the image. Due to this good performance, it is very suitable for making building curtain wall and building edge decoration, also widely used as kitchen utensils.
BA: BA is the surface obtained by bright heat treatment after cold rolling. Bright heat treatment is annealed in a protective atmosphere to ensure that the surface is not oxidized to maintain the luster of the cold-rolled surface, and then smoothed with a high-precision smoothing roller to improve the surface brightness. The surface is close to mirror finish, and the surface roughness Ra value measured by the instrument is 0.05-0.1 μm. BA surface is versatile and can be used as kitchen utensils, household appliances, medical equipment, auto parts and decorations.
No.8: No.8 is a mirror polished surface with the highest reflectivity and no abrasive particles. The stainless steel deep processing industry is also called 8K plate. Generally speaking, BA materials are only used as raw materials for mirror finishing by grinding and polishing. After mirror treatment, the surface is artistic, so it is mostly used for building entrance decoration and interior decoration.
Process of production
1. Rolling, annealing
It is a metal heat treatment process in which the workpiece is heated to a predetermined temperature, and then slowly cooled after holding for a certain period of time. The purpose of annealing is to:
①Improve or eliminate various structural defects and residual stress caused by steel in the process of casting, forging, rolling and welding, and prevent deformation and cracking of the workpiece.
② soften the workpiece for cutting.
③ Refine the grain and improve the structure to improve the mechanical properties of the workpiece.
④ Prepare the organization for final heat treatment and pipe making
2. Articles
The slitting of stainless steel coils is to cut the stainless steel coils into corresponding widths for further deep processing and pipe making. During the slitting process, attention should be paid to the scratches of the slitting knife on the coils, the width and errors of the slits. In addition, the slitting is related to the pipe making process, and the cloak and burr of the slitting are very important for the pipe making process.
3. Welding
The most important process of stainless steel pipe, stainless steel mainly adopts argon arc welding and plasma welding, argon arc welding shielding gas is pure argon gas, mainly welding stainless steel pipes below 3mm, plasma welding has strong penetrating power, mainly welding 5- 8mm stainless steel tube.
4. Weld bead grinding
In the process of welding stainless steel pipe, it is necessary to perform corresponding polishing and water cooling treatment on the outer weld bead. After water cooling the weld bead, directly grind the weld bead with a water mill until it is flat. Generally, add 3-3 to the thickness of the stainless steel pipe. 5 sets of water mills for grinding and trimming of weld bead.
Five, plastic surgery
The process of stainless steel welded pipe is called extrusion production. All square and rectangular pipes are originally from round pipes. By producing round pipes with the same perimeter, they are then extruded into corresponding square and rectangular pipes. Mold shaping and straightening.
6. Cutting
The process of making and cutting stainless steel pipes is relatively rough. Most of them are cut with grinding discs. After cutting, a cloak will be produced, which needs to be further trimmed. In addition, a band saw is used for cutting, and the accuracy is relatively good. The pipe for the purpose needs to be brightly heat treated to make the ductility of the pipe reach a higher level.
Seven, polishing
The usual product pipes and decorative pipes have several techniques for surface treatment. Polishing is divided into 400#, 600#, 800#, while sandblasting is divided into round sand and straight sand, with 180#, 240#, 400# , 600#, 800#, respectively, are suitable for the needs of different levels of customers.
8. Inspection
The inspection mainly checks whether the outer diameter and thickness of the pipe meet the standard, whether the surface treatment meets the standard, and whether the welding process meets the standard.
Packing and Transportation
Packaging is generally naked, steel wire binding, very strong.
If you have special requirements, you can use rust proof packaging, and more beautiful.
Transportation: Express (Sample Delivery), Air, Rail, Land, Sea shipping (FCL or LCL or Bulk)
Our Company
FAQ
Q:Can I go to your company to visit?
A:Of course, we welcome customers from all over the world to visit our company.
Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.
Q:Does the product have quality inspection before loading?
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely.
Q:How about the delivery time?
A:Within 15-45 days after we confirm you requirement.
Q:What is your terms of payment ?
A:T/T, 100% L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me.
Q:How do we trust your company?
A:We consider honest as the life of our company, we can tell you the contact information of our some other clients for you to check our credit.
