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Stainless steel pipe is a versatile hollow, long circular steel, extensively employed in petroleum, chemical, medical, food, light industry, mechanical instrumentation, and other industrial transportation pipes and mechanical structural components. Its unique properties include equal bending and torsional strength with reduced weight, making it ideal for manufacturing mechanical parts and engineering structures. Additionally, it is frequently utilized in furniture and kitchenware.
According to the composition can be divided into Cr series (400 series), CR-Ni series (300 series), CR-Mn-Ni (200 series), heat-resistant chromium alloy steel (500 series) and precipitation hardening series (600 series).
200 Series: Chrome-Manganese-nickel
201,202, etc. : Manganese instead of nickel, poor corrosion resistance, widely used as a cheap substitute for 300 series in China
300 Series: Chromium-nickel austenitic stainless steel
301: Good ductility, used for molding products. It can also be quickly hardened by machining. Good weldability. The wear resistance and fatigue strength are better than 304 stainless steel.
302: Corrosion resistance is the same as 304, and the strength is better because the carbon content is relatively high.
303: By adding a small amount of sulfur and phosphorus to make it easier to cut than 304.
304: general purpose model; 18/8 stainless steel. Products such as: corrosion resistant containers, tableware, furniture, railings, medical equipment. The standard ingredient is 18% chromium and 8% nickel. Stainless steel that is non-magnetic and cannot change its metallographic structure by heat treatment. The GB brand is 06Cr19Ni10.
304 L: the same characteristics as 304, but low carbon, so more corrosion resistance, easy heat treatment, but poor mechanical properties for welding and not easy to heat treatment products.
304 N: With the same characteristics as 304, it is a nitrogenous stainless steel, and nitrogen is added to improve the strength of steel.
309: Compared with 304 has better temperature resistance, temperature resistance up to 980ºC.
309S: With a large amount of chromium, nickel, so good heat resistance, oxidation resistance, products such as: heat exchanger, boiler components, jet engine.
310: Excellent high temperature oxidation resistance, maximum operating temperature 1200ºC.
316: After 304, the second most widely used steel grade, mainly used in the food industry, watch jewelry, pharmaceutical industry and surgical equipment, adding molybdenum element to make it obtain a special structure resistant to corrosion. Because it has better resistance to chloride corrosion than 304, it is also used as "Marine steel". SS316 is commonly used in nuclear fuel recovery units. Grade 18/10 stainless steel is also usually suitable for this application level.
316L: Low carbon so more corrosion resistance, easy heat treatment, products such as: chemical processing equipment, nuclear power generators, refrigerant storage tank.
321: In addition to the addition of titanium to reduce the risk of corrosion of the material weld, other properties are similar to 304..
| Product name | 201 304 316 304L 316L 309S 310S 321 Hairline polished stainless steel tube Round 316 stainless steel tube 304 stainless steel tube | |||
| Specification &Standard | ASTM/ASMES A312 GR. TP304, 304L, 304H, 310S, 310H, 316, 316L, 347, 347H snd etc;ASTM/ASMES A358 CL1&CL3 GR. 304, 304L, 304H, 310S, 310H, 316, 316L, 347, 347H snd etc;Duplex ASTM / ASME SA 790 UNS NO S31803 , S32205 and etc.Inconel ASTM B444 UNS06625 , Incoloy ASTM B423 UNS08825 Hastelloy C276, Monel 400,ASTM B111 C68700, C44300, C70600, C71500, | |||
| Outside diameter | 6mm-3000mm | |||
| W.T. | 0.5-100mm | |||
| Length | 1. Single Random Length and double Random Length.2. SRL: 3M-5.8M DRL: 10-11.8M or As clients requested length3. Fixed length (5.8m, 6m, 12m) | |||
| Pipe Ends | Under 2 inch plain end. 2 inch and above Beveled. Plastic caps (small OD). Iron protector (large OD). | |||
| Surface Treatment | black paint, varnish, oil, galvanized, anti-corrosion coated. | |||
| Marking | Supply Logo + Standard + Size(mm) + HEAT NO +or as your requirement | |||
| Test | Chemical Component Analysis, Mechanical Properties, Technical Properties, Exterior Size Inspection, hydraulic testing , X-ray Test, HIC & SSC test, etc. or as your requirment | |||
Brand | JIULI, WUJIN, ZHONGDA, GAOLIN, GANGYI, DEWEI, ZHANGYUAN etc or as your requirment | |||
| Certificates | API, ISO, SGS, BV, CE, PED, KOC, CCRC, PDO and etc. | |||
| Advantages | 1. Abundant stock and prompt delivery2. Reasonable for whole packages and processes.3. 15 years' QC team service & sales management API& ASTM trained engineers.4. More than 150 customers spread worldwide. (Petrofac, G.S Engineer, Fluor, Hyundai Heavy industry, Kuwait National Oil, Petrobras, PDVSA, PetroEcuador, SHELL, etc.) | |||
| 201 Chemical element content (%) | ||||||||
| element | C | Si | Mn | P | S | Cr | Ni | N |
| Min | - | - | 5.5 | - | - | 16 | 3.5 | - |
| Max | 0.15 | 1 | 7.5 | 0.06 | 0.03 | 18 | 5.5 | 0.25 |
| 304 Chemical element content (%) | |||||||
| element | C | Si | Mn | P | S | Cr | Ni |
| Min | - | - | - | - | - | 18 | 8 |
| Max | 0.08 | 1 | 2 | 0.045 | 0.03 | 20 | 11 |
| 316 Chemical element content (%) | |||||||
| element | C | Si | Mn | P | S | Cr | Ni |
| Min | - | - | - | - | - | 16 | 10 |
| Max | 0.08 | 1 | 2 | 0.045 | 0.03 | 18 | 14 |
| 304L Chemical element content (%) | |||||||
| element | C | Si | Mn | P | S | Cr | Ni |
| Min | - | - | - | - | - | 18 | 8 |
| Max | 0.03 | 1 | 2 | 0.045 | 0.03 | 20 | 12 |
| 316L Chemical element content (%) | ||||||||
| element | C | Si | Mn | P | S | Cr | Ni | Mo |
| Min | - | - | - | - | - | 16 | 10 | 2 |
| Max | 0.03 | 1 | 2 | 0.045 | 0.03 | 18 | 14 | 3 |
| 309S Chemical element content (%) | |||||||
| element | C | Si | Mn | P | S | Cr | Ni |
| Min | - | - | - | - | - | 22 | 12 |
| Max | 0.08 | 1 | 2 | 0.045 | 0.03 | 24 | 15 |
| 310S Chemical element content (%) | |||||||
| element | C | Si | Mn | P | S | Cr | Ni |
| Min | - | - | - | - | - | 24 | 19 |
| Max | 0.08 | 1 | 2 | 0.045 | 0.03 | 26 | 22 |
| 321 Chemical element content (%) | ||||||||
| element | C | Si | Mn | P | S | Cr | Ni | more |
| Min | - | - | - | - | - | 17 | 9 | Ti :5C~0.70 |
| Max | 0.08 | 1 | 2 | 0.045 | 0.03 | 19 | 12 | |
| Specification | Quantity | Specification | Quantity | Specification | Quantity |
| 6-12×1.5-2.5 | 18 | 73×4-4.5-5-6-7-8-9-10-12-15 | 50 | 219×30-40 | 65 |
| 14×1.5-2.5-3 | 20 | 76×4-4.5-5-6-7-8-9-10-12-14 | 60 | 245×8-10-14-17-20-22 | 105 |
| 16×1.5-2.5-4 | 30 | 83×4.5-5-10 | 30 | 245×25-28-30-34-40 | 84 |
| 18×2.3-4-5 | 20 | 89×4.5-8-10 | 40 | 273×7-9-12-15-18-20-25 | 100 |
| 20×2.5-3-5 | 17 | 95×4.5-6-8 | 50 | 273×30-35-38-40 | 50 |
| 24×2.5-3-4-5-6 | 25 | 102×4.5-5-6-10-12-14-16-20 | 80 | 299×8-12-16-20-24-28 | 60 |
| 25×2.5-3-4-5-6 | 28 | 108×4.5-5-14-18-20-22 | 75 | 299×30-32-36-38-40 | 70 |
| 28×3-3.5-4-5-6 | 30 | 114×4.5-5-6-7-8-10-12-14-18-20 | 100 | 325×8-12-14-18-38 | 120 |
| 32×3.5-4-5-6-8 | 40 | 121×4.5-5-6-7-8-10-12-14-16-20 | 102 | 325×28-32-34-38 | 75 |
| 34×4-5-6-8 | 35 | 127×4.5-5-6-7-8-10-12-14-16-20 | 95 | 351×10-16-20-25-40 | 120 |
| 36×3.5-5-6-8 | 30 | 133×4.5-6-8-12-14-16-18-20-25-30 | 120 | 355×6-18-20-25-30-40 | 45 |
| 38×4-5-6-7-8-9-10 | 33 | 140×5-6-7-8-9 | 50 | 377×8-12-15-20-24-28 | 128 |
| 39×3.5-5-8-10 | 30 | 146×4.5-6-8 | 60 | 377×30-37-40 | 60 |
| 42×3.5-4-5-6-7-8-9-10 | 35 | 152×4.5-6- | 60 | 402×10-20-25-30-35 | 70 |
| 45×3.5-4-5-6-7-8-9 | 40 | 159×4.5-6-10-12-14 | 80 | 406×10 | 110 |
| 48×3.5-4-5-6-7-8-9-10 | 24 | 159×16-18 | 30 | 426×10 | 97 |
| 51×3.5-4-5-6-7-8-9-10 | 60 | 168×8-25-30-35 | 130 | 450×10-20-25-34-40 | 108 |
| 56×3.5-4-5-6-7-8-9-10 | 58 | 180×8-12-16-25-30 | 105 | 480×25-30-40 | 95 |
| 57×3.5-5-6-7-8-9-10-12 | 50 | 180×32-34-38-40 | 102 | 500×10-34-40-45 | 100 |
| 60×3.5-4.5-5-6-7-8-9-12-14 | 60 | 194×6-8-25-30-40 | 140 | 510×10-25-34-40-45 | 110 |
| 63×3.5-4.5-5-6-7-8-9-10-12-14 | 40 | 203×6-7-10-15-20-25-30 | 90 | 530×20-30-40 | 140 |
| 68×4-4.5-5-6-7-8-9-10-12-14-16 | 35 | 203×32-36-40 | 70 | 560-720*6-10-24-45 | |
| 70×4-4.5-5-6-7-8-9-10-12-15-16 | 40 | 219×6-8-12-16-18-20-25 | 110 |
Application requirement
Folding automobile industry
In the automotive sector, stainless steel plays a crucial role, particularly in the exhaust system, which accounts for over half of the total stainless steel used in vehicles, with 80% being ferritic stainless steel. The exhaust system directs engine-produced gases through components like the muffler, exhaust intake pipe, front pipe, hose, converter, and center pipe. Commonly used steel types for exhaust systems include 409L and 436L. Stainless steel welded pipes are predominantly used for automobile mufflers, with the automotive industry consuming roughly 1.5% of all downstream stainless steel pipes. The ratio of stainless steel seamless to welded pipes is approximately 2:1.
The folding petrochemical industry includes the fertilizer industry
In the petrochemical sector, the demand for stainless steel pipes is significant. This industry primarily uses stainless steel seamless pipes with specifications such as 304, 321, 316, 316L, 347, and 317L. These pipes typically range in outer diameter from 18-¢610mm and wall thickness from 6mm-50mm (generally selecting specifications above Φ159mm for medium and low-pressure pipelines). Key application areas include furnace tubes, material conveying tubes, and heat exchanger tubes.
Folding water and gas and other fluid transport
Stainless steel pipes and their associated water transport equipment represent the pinnacle of basic water purification materials globally. Their robust corrosion resistance makes them superior to cast iron, carbon steel, and plastic pipes.
For water preparation, storage, transportation, purification, regeneration, desalination, and other water industries, stainless steel is the optimal material choice, with an annual demand of approximately 25,000 tons.
Folding equipment manufacturing and maintenance
The equipment manufacturing and maintenance industry consumes over 20,000 tons of stainless steel pipes annually. This sector mainly utilizes sanitary or antibacterial grade stainless steel pipes. Sanitary seamless pipes made from imported SUS304 and 316L meet the stringent requirements of various media in the food and biopharmaceutical fields. Antibacterial stainless steel combines the qualities of stainless steel with excellent antibacterial properties, driving demand in the kitchen equipment, food industry worktables and utensils, medical equipment, daily life tableware, hanging towel brackets, and refrigerator sectors.
Our Advantages
Qualitative Materials:
We use top-grade raw materials to ensure our products exhibit superior strength, resilience, and longevity.
Advanced Technology:
Our manufacturing processes leverage state-of-the-art technologies, including advanced smelting, continuous casting, and rolling.
Customized Service:
We provide bespoke design and manufacturing services to meet specific customer needs and requirements.
FAQ
Q1: Why choose your company?
A: With over 16 years of unparalleled industry expertise and our own sophisticated factory, we are proud to offer exceptional services. Our professional and dedicated sales team ensures that every customer receives personalized attention and the highest quality support.
Q2: What are your terms of payment?
A: Our payment terms are straightforward and customer-friendly. We require a 30% T/T deposit upfront to commence processing your order, with the remaining 70% due before delivery, ensuring a smooth transaction process.
Q3: What are your delivery terms?
A: To cater to diverse logistical needs, we offer flexible delivery terms including FOB, CFR, CIF, and EXW, allowing you to choose the most convenient option for your requirements.
Q4: What is your delivery time?
A: We are committed to prompt delivery. Our standard lead time ranges from 7 to 15 days after receiving the deposit, ensuring that your order reaches you in a timely manner.
Q5: Can you provide samples?
A: Absolutely! We are pleased to offer free samples if available in stock. Please note that transportation fees are the responsibility of the buyer.Certification
