ASTM A312 TP304L Stainless Steel Seamless Pipe

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of astm a312 tp304l stainless steel seamless pipe in China. With abundant experience, we warmly welcome you to wholesale customized astm a312 tp304l stainless steel seamless pipe from our factory. For price consultation, contact us.

As a trusted global supplier, GNEE has exported TP304L stainless steel welded pipes to over 80 countries worldwide, with an annual shipment volume exceeding 2,000 tons. Our raw materials are sourced exclusively from qualified steel mills equipped with comprehensive traceability systems, ensuring that every batch of products can be traced back to a specific heat number and has undergone verification via PMI (Positive Material Identification) testing.

Our ASTM A312 TP304L seamless pipes are specifically engineered for critical high-pressure applications. By utilizing Grade A VOD/AOD refined billets, we strictly control carbon content to ≤ 0.030% and sulfur content to below 0.005%. Furthermore, all SS 304L pipes undergo solution annealing at high temperatures (≥ 1040°C) followed by rapid quenching; this process ensures the formation of a fully austenitic microstructure with uniform grain structure, effectively preventing carbide precipitation and significantly enhancing the material's resistance to intergranular corrosion.

Regarding wall thickness uniformity and eccentricity, the wall thickness tolerance for our ASTM A312 TP304L round pipes is typically maintained within ±10%, with an eccentricity of ≤ 10%. This ensures uniform stress distribution throughout the pipe during operation, thereby eliminating potential weak points.

ASTM A312 TP304L Stainless Steel Seamless Pipe

The inner wall of ASTM A312 TP304L pipe

For our ASTM A312 TP304L hot-rolled seamless pipes, we employ pickling and passivation processes to ensure that both the internal and external surfaces are thoroughly cleared of mill scale, oil residues, and various contaminants. The surface roughness is typically controlled to Ra ≤ 0.8 μm, effectively mitigating the risks of scaling and the initiation of corrosion. Through these measures, we have successfully resolved numerous critical challenges faced by our clients such as premature corrosion, uneven wall thickness, and quality fluctuations.

Request a Quote Now

Composition ranges for 304  stainless steel round pipe

Mechanical properties of 304 grade stainless steel pipe

Physical properties of 304 grade stainless steel in the annealed condition

ASTM A312 SS 304L Seamless Pipe Tolerances

ASTM A312 TP304L Pipe Applications

Chemical and Petrochemical Industries: In reactors, piping systems, and pressure vessels.
Food, Beverage, and Dairy Processing Industries: Sanitary piping, storage tanks, and processing equipment.
Oil and Gas Transport: In pipelines for transporting hydrocarbons, offshore wellhead facilities, and refining processes.

Stainless Steel 304L Pipe Test Certificates

» Manufacturer Test Certificate
» IBR Test Certificate (Form III-D)

Beyond the standard Hydro-test, we perform 100% Ultrasonic (UT) and Eddy Current (ET) testing to detect any internal longitudinal or transverse flaws, ensuring the pipe can withstand high-pressure service without failure.

Our products like 304L Stainless Steel Pipe are packaged to make sure that there's no damage throughout transit. Just in case of exports, customary export packaging is completed in wooden boxes or cases.
All 304L Stainless Steel Pipe are marked with Trademark (Company's LOGO), Grade, Size and Lot No. On requests we can do custom marking these SS 304L Pipe.

Standard export wooden crate packaging

Standard export wooden crate packaging

FAQ 

Q: What is the manufacturing process for ASTM A312 TP304L seamless pipes?
Hot Finished: The pipes are formed at high temperatures using extrusion or piercing processes.
Cold Finished (i.e., Cold Drawn/Cold Rolled): The pipes undergo processing at ambient temperature.

Q2: Why is TP304L preferred over TP304 in high-pressure seamless piping systems?
The "L" in the grade designation stands for "Low Carbon," indicating a carbon content of ≤ 0.035%. This effectively prevents "sensitization" (i.e., the precipitation of carbides at grain boundaries) during welding, thereby ensuring that the pipe retains excellent resistance to intergranular corrosion within the Heat-Affected Zone (HAZ).

Q3: What does "Dual Certification" (304/304L) for seamless pipes refer to?
Gnee frequently supplies seamless pipes featuring "Dual Certification." This material possesses the low-carbon characteristics of the 304L grade (ensuring excellent weldability) while simultaneously meeting the higher mechanical strength requirements-including tensile strength and yield strength-specified for the standard 304 grade. This combination of properties allows engineers to utilize higher design pressures without compromising corrosion resistance.
 

Hot Tags: astm a312 tp304l stainless steel seamless pipe, China astm a312 tp304l stainless steel seamless pipe manufacturers, factory, seamless tube supplier, smls tube, ASTM 347 310S 309 ss square pipe, 304 Stainless Steel Seamless Pipe, smls pipe price, seamless stainless steel pipes