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Customized Stainless Steel Seamless Pipe for Your Specific Requirements
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Nuclear Grade Stainless Tube
A nuclear grade stainless tube is a hot-extruded seamless product in 304L or 316L austenitic stainless — or Hastelloy C276 / Inconel 625 for the most severe radiation and corrosion duty — produced by Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. under a material control regime far stricter than ordinary industrial tubing. Low carbon eliminates sensitization in reactor coolant; controlled ferrite ensures predictable weld behaviour; every heat is vacuum- or ESR-remelted and 100% PMI-verified, with no re-classified industrial stock admitted.
Data Center Liquid Cooling Pipes
JILAIDA factory's Data Center Liquid Cooling Pipes is not a single SKU — five liquid cooling architectures run in production data centers today, and each puts a different demand on the tube. Cold-plate loops carry deionized water or dilute glycol from a rack-level manifold to copper cold plates on CPU and GPU packages. Single-phase immersion submerges the server in dielectric fluid; the tube is the secondary loop pulling heat through a rack-side heat exchanger.
Stainless Steel Square Extruded Pipe
Ji lai da is a professional China manufacturer of stainless steel square extruded pipe, providing seamless hot-extruded square tubes with superior pressure integrity, thermal performance, and customized cross-sections. Unlike welded square tubes, these pipes are formed from a single billet without weld seams or weak corners, ensuring higher strength, better corrosion resistance, and excellent dimensional stability. Available in 304, 316, 310, 310S, 316L and other austenitic stainless steel grades, our factory offers customized solutions, MTC documentation, and direct wholesale supply for global industrial buyers.
316 Extruded Square Pipe
Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. manufactures the 316 extruded square pipe using hot extrusion technology, delivering a seamless one-piece structure with no weld seams. 316 stainless steel contains 2–3% molybdenum, giving it noticeably better resistance to pitting and crevice corrosion than 304-grade alternatives. The 316 extruded square pipe from Ji lai da is well suited for saltwater exposure, chemical processing, and any environment where chloride-induced corrosion is a concern — all at a price point significantly lower than nickel-based alloy square pipes.
304 Extruded Square Pipe
304 is the most widely used stainless steel in the world — and for good reason. It delivers solid corrosion resistance, good formability, and reliable mechanical strength at the lowest material cost in the stainless family. The 304 extruded square pipe from Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. takes those same advantages and forms them into a seamless square profile through hot extrusion, giving you a one-piece tube with no weld seams at a price that nickel alloys and even 316 can't touch. If your project doesn't face chlorides or extreme temperatures, 304 is almost always the smartest economic choice.
AI Liquid Cooled Cooling Pipe
AI liquid cooled cooling pipe is a hot-extruded seamless shaped profile designed to carry coolant directly against the heat-generating components inside AI training racks — where a single cabinet can draw 100 kW and air cooling can no longer remove that heat density at acceptable fan power or acoustic levels. The pipe features an unequal-wall cross-section: 3.3 mm on three sides and 13 mm on the heat-spreader face, minimizing thermal path length where it matters most.
How Corrosion Testing Works on Seamless Pipe
A standard MTC per EN 10204 3.1 reports chemistry and mechanical properties. For stainless steel seamless pipe in corrosion-critical service, the buyer should also specify a corrosion test:
Intergranular corrosion per ASTM A262 Practice A-E. The most common test. Practice E (Strauss test) immerses a sample in boiling copper sulfate-sulfuric acid with copper chips and measures whether grain boundary attack has occurred. A properly annealed seamless pipe in 304L or 316L passes without detectable attack. This test catches sensitization from improper heat treatment - a problem that does not exist in as-extruded seamless pipe because there is no weld heat-affected zone to sensitize.
Pitting corrosion per ASTM G48. For 316, 2205, and high-nickel grades. A sample is immersed in ferric chloride solution at a specified temperature for 24 to 72 hours. The critical pitting temperature (CPT) - the temperature at which pitting initiates - is reported. For 316L, CPT is typically 15 to 20 C. For 2205, it rises to 35 to 40 C. This test is essential for seawater and chloride service specifications.
Stress corrosion cracking per ASTM G36. For 304 and 316 in chloride environments. A U-bend sample is immersed in boiling magnesium chloride for up to 200 hours. Cracking indicates susceptibility. This test is rarely specified for 2205 because duplex grades are inherently resistant to chloride SCC - one of the reasons buyers upgrade from 316L to 2205 for desalination service.
JILAIDA runS these tests in-house or through certified partner laboratories. Results are included in the documentation package when specified in the RFQ. SGS, BV, or TUV can witness any test at our facility.
What the RFQ Should Include
To receive factory-direct pricing from Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. within 24 hours, include:
1. Grade and standard. UNS number or national standard (GB, GOST, EN, JIS). State whether dual-standard certification is needed.
2. Dimensions. OD, wall thickness, and length. Specify whether length is fixed, random, or a range. For non-standard OD or wall combinations, we confirm tooling availability before quoting.
3. Quantity. Total meters or total weight. For standard grades (304, 316L), minimum order is 500 kg. For 2205 and high-nickel austenitic grades, 300 kg. Sample lengths of 300 to 500 mm available for qualification.
4. Surface finish. Pickled (standard), polished (specify Ra), or bright-annealed.
5. Testing. EN 10204 3.1 is standard. List supplementary tests: ASTM A262, G48, G36, ultrasonic per ASTM E213, hydrostatic at 1.5x design pressure. Specify if EN 10204 3.2 with third-party witness is required.
6. Delivery terms. FOB Shanghai, CIF to your port, or DDP to your warehouse.
7. End preparation. Plain cut, beveled for butt-welding, or threaded.
Who Orders and What They Care About
Chemical and petrochemical plants. The largest buyer group for 316L and 2205 seamless pipe. They specify corrosion test requirements and demand full heat-lot traceability. The stainless steel seamless pipe feeds acid lines, chloride service, and catalytic process piping. Lead time is project-driven. Middle East buyers (UAE, Saudi Arabia, Qatar) typically request CIF; Indian buyers prefer FOB with their own forwarder.
Oil and gas. Sour service lines requiring NACE MR0175 compliance. 316L and 08Х17Н14М2 for moderate-sour service; 2205 for higher chloride content. The buyer specifies H2S partial pressure and CO2 content in the RFQ. Documentation must include chemistry confirmation of low sulfur and phosphorus.
Power generation. Boiler and superheater tubing in 310S. Nuclear-island auxiliary piping in 304 and 316L. Full code traceability per ASTM/ASME. The buyer is an EPC contractor building a plant, and every piece of pipe must have a paper trail from melt to installation.
Pharmaceutical and food. Hygienic-grade piping in 304 or 316L with bright-annealed internal surfaces. Low volume, high margin, strict surface requirements. The buyer is a cleanroom contractor who needs protective end caps and a certificate of surface roughness.
Desalination. Brine concentrate and SWRO reject piping. 2205 duplex competes on life-cycle cost against titanium. The buyer calculates cost per year of service, not cost per kilogram, and the duplex grade's higher yield strength allows thinner wall - which can make 2205 cheaper than 316L on an installed-cost basis despite the higher alloy surcharge.
Packing and Delivery
Pipe is packed in wooden crates with steel strapping. Each bundle is tagged with heat number, grade, size, quantity, and MTC reference. End caps protect the bore. Desiccant packs are included for bright-annealed shipments. China manufacturer Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. ships FOB from Shanghai, Ningbo, or Lianyungang. CIF and DDP are available. Standard production lead time is 3 to 4 weeks for 304 and 316L; 4 to 5 weeks for 310S and 2205; 5 to 7 weeks for Russian-standard and high-nickel austenitic grades. ISO 9001 governs the quality system with four additional industry certifications.
FAQ
Why is seamless pipe more expensive than welded?
The production process is slower and more material-intensive. A welded pipe line can run continuously from coil strip at 3 to 5 meters per minute. Seamless extrusion produces pipe one billet at a time, with billet preparation, heating, pressing, cooling, and inspection between each piece. The 15 to 30 percent price premium reflects this throughput difference. For services where the weld seam would be a failure initiation point, the premium is justified. For general-purpose low-pressure service, welded pipe may be adequate - we will advise based on your conditions.
Can you supply both EN 10204 3.1 and 3.2 certificates?
Yes. 3.1 is standard on every shipment. 3.2 requires a third-party inspector - SGS, BV, or TUV - to witness the test cuts and co-sign. Add 5 to 7 working days for the inspector visit.
What is the practical size range for seamless stainless pipe?
OD 6 to 89 mm, wall thickness 3 to 9 mm, length 3000 to 10000 mm. We can produce outside these ranges on a custom basis, but tooling cost and minimum quantity may apply.
