Premium Stainless Steel Seamless Pipe Supplier | ASTM A312 Standard | 304, 316L, 310S
Thickness：0.5-40mm
Diameter: 3mm–1000mm
Length：6000-25000mm
Surface：2B, 2D, No. 1, No. 4, BA, HL, 6K, 8K, polishing, annealing, pickling, bright
Standard：ASTM，AISI，JIS,GB， DIN,EN
Products can be customized
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Stainless steel seamless pipe performance parameters
| Product Name | Stainless Steel Seamless Tube | |
|---|---|---|
| Material | 201(1Cr17Mn6Ni5N), 202(1Cr18Mn8Ni5N), 301(1Cr17Ni7), 302(1Cr18Ni), 304(0Cr18Ni9) SS304, TP304 | |
| 304L(00Cr19Ni10) SS304L, TP304L, 321(1Cr18Ni9Ti) SS321TP321, 316(0Cr17Ni12H2O2) SS316TP316, 316L(0Cr17Ni14Mo2), SS316LTP316L, 310S(0Cr25N20), SS310S, TP310S | ||
| Model | length 6000-25000mm, diameter: 3mm--1000mm thickness: 0.5-40mm | |
| Standard | GB2270-80, JIS, ASTM, DIN, EN, AISI | |
| Place of Origin | Shandong, China | |
| Delivery time | 7-15 days | |
| Surface finishing | 2B, 2D, No. 1, No. 4, BA, HL, 6K, 8K, polishing, annealing, pickling, bright, etc. | |
| Certificate | ISO9001,SGS,CE | |
| Supply capacity | 20,000 tons/year | |
| MOQ | 1 ton | |
| Trade Terms | FOB, CIF, CFR, EXW, FCA, FAS, etc. | |
| Payment | TT, LC, We can negotiate | |
| Tests | squash test, extension test, hydrostatic test, crystal decay test, heat resistance | |
| Application | Widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames and steel scaffolding used in construction. Using steel pipe to make ring parts can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jack sleeves, etc. | |
Advantages of Our Stainless steel seamless pipe
Extreme Pressure Resistance and System Safety
Due to their structural integrity, our stainless steel seamless pipes eliminate the inherent weakness of a weld seam. This means the pipes offer exceptional burst resistance and a high safety margin under extreme high-pressure environments. For clients transporting hazardous media or operating high-pressure boiler systems, this is not just a performance guarantee, but a core barrier to prevent accidents and ensure personnel and production safety.
Extended Service Life in Harsh Corrosive Environments
While welded pipes are prone to electrochemical corrosion or stress cracking at the weld zone, our seamless piping avoids this issue through uniform material distribution. Combined with precise solution treatment, these pipes exhibit superior corrosion resistance when handling strong acids, alkalis, and marine salt spray. This chemical stability significantly extends maintenance cycles and substantially reduces long-term operational costs for factories.
Strict Global Compliance and Non-Destructive Testing (NDT)
Every seamless pipe we produce strictly adheres to international standards such as ASTM A312 and ASME SA213. Through 100% Eddy Current Testing, Ultrasonic Testing (UT), or Hydrostatic testing, we ensure every inch of the pipe is free from pinholes, cracks, or thinning. This rigorous quality control ensures reliable application in top-tier engineering projects, including nuclear power, aerospace, and precision chemical processing.
Packaging style of Stainless steel seamless pipe
FAQs
How can I be sure the wall thickness of the seamless pipe I choose can withstand my system's working pressure?
We can provide pressure calculation references based on ASME B31.3 or relevant engineering standards. Since seamless pipes have no weld-seam weaknesses, their pressure-bearing calculations are more reliable. We will recommend the safest Schedule (SCH) based on your design pressure, operating temperature, and medium characteristics.
Some suppliers substitute seamless pipes with "bead-removed" welded pipes. How do you prove your product is truly seamless?
We support metallographic examination, where seamless pipes show a completely uniform grain structure under a microscope without any weld heat-affected zones. Furthermore, the provided MTC will explicitly state the manufacturing process as “Seamless,” and we welcome physical property comparisons by any third-party laboratory.
Seamless pipes can have uneven wall thickness. How do you control eccentricity?
We use high-precision piercing and cold-drawing processes, strictly adhering to the tolerance ranges specified in ASTM A312 (typically ±12.5% of the wall thickness). For precision instrument applications, we can further tighten tolerances through multi-pass cold rolling to ensure wall balance.
What tests are performed on your seamless pipes before delivery? Is every single pipe pressure-tested?
Yes. Every pipe must pass 100% Hydrostatic Testing or Eddy Current Testing before leaving the factory. For specialized industrial needs, we also provide Ultrasonic Testing (UT) and Intergranular Corrosion Testing to ensure there are no hidden internal defects in the pipe wall.
In acidic or high-salinity environments, is 304 or 316L seamless pipe more durable?
For coastal or chemical environments, we strongly recommend 316L seamless pipes. Due to the 2-3% Molybdenum (Mo) content, its resistance to pitting and crevice corrosion is far superior to 304. The seamless structure further prevents the accumulation of acidic media at weld zones, significantly extending equipment life.
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