ASTM A312 TP304/Tp316L/Tp321 40inch Polished Round Stainless Steel Welded Tube for Iron Building Material
Product Name |
Stainless Steel pipe |
Pipe Process Type |
Seamless: Hot rolled, cold drawn, cold rolled, etc. Welded: ERW, SAW, EFW, etc. |
Standard |
DIN, BS, EN, ISO, GB, AISI, SAE, GOST, IS, KS, ANSI, AFNOR, UNI, CSA, AS/NZS. |
Specification and Grades |
Stainless Steel: ASTM A312, ASTM A269, ASTM A358, ASTM A778, ASTM A790 304, 304L, 316, 316L, 310, 317L, 321, 347, 410, 904L |
Shape |
Round, Square, Rectangular, Oval, Hexagonal, etc. |
Size Range |
OD: 6mm-2500mm WT: 1mm-150mm Length: 6m 9m 12m OR others |
Application Industry |
Oil and Gas, Construction, Water Supply and Treatment, Automotive, Power Generation, etc. |
Pipe Ends |
Plain End (PE), Beveled End (BE), Threaded End (TE), Grooved, Bell End, Tapered, Expanded. |
Tolerance |
As standards' Requirements |
Certification |
GB/T19001-2016/ISO9001:2015 GB/T24001-2016/ISO14001:2015 GB/T 45001-2020/ISO 45001:2018 |
Processing Service |
Cutting, Bending, Threading, Welding, Grooving, Coating, Drilling, Galvanizing, Heat Treatment, Punching. |
MOQ |
1 Ton |
Packaging |
Bundled, Wooden Cases, Plastic Wrapping, Plastic Caps, Palletized, Shrink Wrapped, Plastic Bagged, Steel Crates, Loose, Boxed. |
Delivery Term |
EXW, FOB, FCA, etc. |
Delivery Time |
3-5 days for the regular models, and 7 to 10 working days for the special sizes and processing |
Payment Term |
T/T, L/C, D/P, etc. |
Customization |
Customization Available |
Stainless steel seamless pipes have gained significant attention in various industries due to their numerous advantages and wide range of applications. With their exceptional strength, durability, and resistance to corrosion, stainless steel seamless pipes have become a preferred choice for various applications, including oil and gas, chemical processing, automotive, and construction.
| Standard | ASTM, GB, JIS, DIN, EN, AISI |
| Material Grade | TP304 TP304L TP316 TP316L TP347 TP347H TP321 TP321H TP310 TP310S |
| TP410 TP410S TP403 | |
| S31803/S32205 S32750 S32760 | |
| Outer Diameter | 6mm - 762mm |
| Thickness | 0.5mm - 65mm |
| Length | 5.8-6.1 m or as customers' request |
| Tolerance | Acording to the Standard. |
| Surface | Pickling, annealing,polished,Bright Annealing (BA Finished),Grinding, etc |
| Test | UT, ET, HT, etc, and others according to the standard,or as the requests of the customers |
| Certificate | TUV,ABS,CCS,PED,LR,BV etc. |
| Delivery Time | 15-50Days, Depends on quantity |
Austenitic Stainless Steel |
201, 301, 304, 305, 310, 314, 316, 321, 347, 370, etc |
Martensitic Stainless Steel |
410, 414, 416, 416, 420, 431, 440A, 440B, 440C, etc |
Duplex Stainless Steel |
S31803, S32101, S32205, S32304, S32750, etc |
Ferritic Stainless Steel |
429, 430, 433, 434, 435, 436, 439, etc |

Surface |
Characteristic |
Processing Technology |
N0.1 |
Original |
Pickled after hot rolling |
2D |
Blunt |
Hot rolling + annealing shot peening pickling + cold rolling + annealing pickling |
2B |
Blurred |
Hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + tempering rolling |
N0.3 |
Matte |
Polishing and tempering rolling with 100-120 mesh abrasive materials |
N0.4 |
Matte |
Polishing and tempering rolling with 150-180 mesh abrasive material |
NO.240 |
Matte |
Polishing and tempering rolling with 240 mesh abrasive materials |
NO.320 |
Matte |
Polishing and tempering rolling with 320 mesh abrasive materials |
NO.400 |
Matte |
Polishing and tempering rolling with 400 mesh abrasive materials |
HL |
Brushed |
Grind the surface of the steel belt with an appropriate grinding grain size to makeit show a certain longitudinal texture |
BA |
Bright |
The surface is annealed and shows high reflectivity |
6K |
Mirror |
Rough grinding and polishing |
8K |
Mirror |
Fine grinding and polishing |
Advantages of Stainless Steel Seamless Pipes
Stainless steel seamless pipes have become a popular choice in various industries due to their numerous advantages. These pipes are made from high-quality stainless steel, which offers exceptional strength, durability, and resistance to corrosion. One of the key advantages of stainless steel seamless pipes is their seamless construction. Unlike welded pipes, seamless pipes are made by piercing a solid billet of steel and then rolling it into a seamless tube. This seamless construction eliminates the need for any welding, resulting in a smoother interior surface and better flow efficiency.
Another advantage of stainless steel seamless pipes is their ability to withstand high temperatures and pressure. These pipes are commonly used in industries that require the transportation of fluids and gases at extreme conditions. The seamless construction ensures that the pipes can handle the stress and pressure without any leaks or failures. Additionally, stainless steel is known for its heat resistance, making it suitable for applications where the pipes are exposed to high temperatures.Stainless steel seamless pipes are also highly resistant to corrosion. This is due to the presence of chromium in the steel, which forms a protective layer on the surface of the pipes. This layer acts as a barrier against corrosive elements, such as water, chemicals, and environmental factors. As a result, stainless steel seamless pipes have a longer lifespan compared to other types of pipes, reducing the need for frequent replacements and maintenance.
Furthermore, stainless steel seamless pipes offer excellent hygiene and cleanliness. The smooth interior surface of these pipes prevents the accumulation of bacteria, making them suitable for applications in the food and beverage industry, pharmaceutical industry, and medical facilities. The resistance to corrosion also ensures that there is no contamination of the transported fluids or gases, maintaining the integrity of the products being transported.
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