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Utilizing 26 high-precision cold rolling mills and 6 cold drawing machines, we ensure dimensional accuracy and superior mechanical properties.
ASTM A312 TP304L Cold Drawn Pipe
Low-Carbon Austenitic | UNS S30403 | Excellent Weldability
ISO 9001 | FDA Compliant | ASME SA312Related Products
Introduction
ASTM A312 TP304L Cold Drawn Pipe is the low-carbon variant of the world's most widely specified austenitic stainless steel, engineered specifically to solve the intergranular corrosion problems that can occur near weld seams. By holding carbon content to a maximum of 0.030%, TP304L resists chromium carbide precipitation during welding, eliminating the need for post-weld solution annealing in most applications. This makes it the default choice for fabricators who need to join pipe sections in the field without access to furnace facilities, while still delivering the excellent general corrosion resistance, non-magnetic behavior, and hygienic surface quality that the 18-8 chromium-nickel family is known for.
The cold drawing process used to manufacture this pipe pulls a hollow shell through a precision die and mandrel below the recrystallization temperature, producing a smooth interior and exterior surface, tight diameter and wall thickness tolerances, and a refined grain structure. Unlike hot-finished or welded pipe, cold drawn TP304L offers superior roundness and straightness, which is critical for sanitary tube fittings, instrumentation lines, and applications where dimensional consistency affects downstream assembly. After drawing, the pipe is solution annealed between 1010°C and 1150°C and rapidly quenched to relieve internal stress from cold working and restore full corrosion resistance across the cross-section.
TP304L cold drawn pipe is routinely selected for dairy and brewery processing lines, potable water distribution, architectural handrails and structural tube, general chemical transport, and appliance or furniture tubing where a bright, easily cleanable surface is required. It performs reliably in mild to moderately corrosive environments but is not the correct choice where chloride concentrations are high, such as coastal atmospheres or seawater contact — in those cases, molybdenum-bearing grades like TP316L should be specified instead. Standard testing includes hydrostatic pressure testing, positive material identification, and intergranular corrosion testing per ASTM A262 Practice E when specified.
Specifications
| Material Grade | TP304L (UNS S30403) |
| Standard | ASTM A312, ASME SA312 |
| Outer Diameter | 6mm - 273mm |
| Wall Thickness | 0.8mm - 20mm |
| Length | Up to 12000mm |
| Finish | Pickled / Bright Polished |
Chemical Composition
| C | Mn | Si | Cr | Ni |
| ≤.03 | ≤2.0 | ≤0.75 | 18-20 | 8-12 |
Low Carbon Food Grade
Mechanical Strength
Comprehensive Info
| MOQ | 1000kg |
| Lead Time | 15 - 25 Days |
| Testing | PMI & Hydro-test |
| Raw Material | EAF + AOD Refined |
Key Applications
Food & Beverage Sanitary dairy and brewery process piping
Pharmaceutical Cleanroom and WFI water systems
Architecture Handrails, facades and structural tube
Advantages
No Sensitization
Resists carbide precipitation at weld seams without PWHT.
Sanitary Surface
Bright annealed finish suited for hygienic service.
Cost Efficient
Economical alternative to molybdenum-bearing grades.
Tight Tolerance
Cold drawing delivers superior roundness and OD control.
About Jiangsu Jend Tube Co.,Ltd.
As China ASTM A312 TP304L Cold Drawn Pipe Manufacturers and Wholesale ASTM A312 TP304L Cold Drawn Pipe Factory, Established in 2011 and is a manufacturing enterprise with a complete manufacturing cycle from raw material selection to finished product delivery. The company currently has more than 100 employees, covers an area of 30015 square meters, and has a registered capital of 48 million yuan, annual production capacity of 3800 tons.
The company has passed ISO9001:2015 quality certification, domestic pressure vessel TS certification, and foreign pressure vessel PED certification. With rich experience and mature technology, we have been expanding our market internationally. At present, our products are exported to more than 50 countries and regions including Europe, America, Southeast Asia, and the Middle East.
The company adheres to different production norms and standards such as the American standard (ASTM), the European standard (EN), the German standard (DIN), the Japanese standard (JIS), the Russian standard (GOST), and the Chinese standard (GB).
Our company specializes in and customizes various specifications of Martensite TP410 (0Cr13, 1Cr13), Ferrite TP405 (1Cr13Al), TP430 (1Cr17), TP444 (0Cr18Mo2), TP439, TP409 (0Cr11Ti), It is also proficient in manufacturing Austenitic seamless stainless steel pipes of series such as TP304(L/H), TP316(L/H/Ti), TP310S, TP317, TP321(H) and TP347(H). Duplex such as S31803, S2205, S32750, S32304, and Nickel-based alloys Monel400, Monel600, Monel800, GH3030, 904L, Inconel 625, etc.
The company mainly produces seamless steel pipes with the following specifications: outer diameter: 3.18mm to 406.4mm, wall thickness: 0.3mm to 20mm, and the longest length is 25000mm. Additionally, it can customize seamless steel pipes with special materials and specifications according to customer requirements. The company attaches great importance to scientific innovation. The staff of the company vigorously develop technological research and development.
Jiangsu Jend Tube Co.,Ltd. will continuously accumulate professional knowledge and capabilities, striving to become a leader in the domestic market and even the world market. Strive to be the most reassuring pipe manufacturing enterprise for customers.
Precision Manufacturing and Process Optimization
We rely on precision equipment and optimized production technologies to achieve outstanding mechanical performance and consistent product quality.
Cold Rolling and Cold Drawing
Solution Heat Treatment
Natural gas solution treatment furnaces and BA solution treatment furnaces optimize the material's grain structure, enhancing corrosion resistance.
Precision Straightening and Polishing
10 straightening machines and 8 finishing polishing machines guarantee product surface smoothness and dimensional accuracy.
Automated Inspection and Quality Assurance
Real-time monitoring systems ensure the stable quality of every batch of products.
Usage Tips
Passivation
Citric acid passivation after fabrication restores the chromium oxide layer disturbed by machining.
Chloride Limit
Avoid continuous exposure above roughly 200ppm chloride; upgrade to TP316L for coastal or brine service.
Services
Mirror Polishing
Ra ≤0.4µm interior finish available.
Orbital Weld Prep
Bevel and fit-up for automated tube welding.
Sanitary Fittings
Tri-clamp and butt-weld fitting assembly.
Logistics
30% T/T Deposit / L/C at sight. Bundled in wooden crates with edge protectors; end caps fitted to prevent moisture ingress during sea freight.
Standards
ASME SA312
ASTM A270
ISO 9001
FDA 21 CFR
Frequently Asked Questions
What is the difference between TP304 and TP304L?
TP304L caps carbon at 0.030% versus 0.08% for standard 304, which prevents chromium carbide precipitation at weld heat-affected zones and removes the usual need for post-weld annealing.
Is TP304L magnetic?
In the annealed condition it is essentially non-magnetic, though cold working during drawing can induce slight magnetism at the surface.
Can TP304L be used for seawater piping?
It is not recommended for continuous seawater or high-chloride exposure; TP316L or a duplex grade is a better fit for those environments.
What benefit does cold drawing provide over welded pipe?
Cold drawing produces a seamless wall with tighter dimensional tolerances, a smoother bore, and no weld seam to inspect or fail.
Do you offer sanitary (Ra) polished tube?
Yes, interior polishing down to Ra 0.4µm or better is available for dairy, brewery and pharmaceutical piping.
Which standard governs mechanical properties?
ASTM A312 / ASME SA312 sets the minimum tensile, yield and elongation requirements referenced in the specifications table above.
Ready to Order TP304L Cold Drawn Pipe?
Contact us for sanitary finish options, mill certificates, and volume pricing.
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