Introduction

As an austenitic steel pipe with low carbon content and excellent corrosion resistant properties, 304L stainless steel pipe manufactured to ASTM A312 TP304L standard eliminates the risk of intergranular corrosion after welding. It is widely used in chemical, oil & gas, food processing, water treatment, and heat exchanger applications without requiring post-weld solution treatment.

Chemical components(%)

Mechanical properties

Physical properties

304L Stainless Steel Pipe Available Products and Standard

1. GB/T 14976 

(Fluid Transporting Seamless Stainless Steel Pipes)

Material equivalent: 022Cr19Ni10 (304L low carbon stainless steel pipe)

Type: 304L Steel Seamless pipe (Cold drawn / Cold rolled)

Size Range:

• Outer diameter (OD): 6 – 610 mm

• Wall thickness (WT): 0.5 – 60 mm

• Length: 2 – 12 m (random or fixed length)

Surface: Annealed, Pickled, Bright annealed (for small diameters), or as-rolled

Testing: Chemical analysis, tensile test, flaring/flattening test, hardness test, hydrostatic or eddy current test, dimensional inspection

2. ASTM A312 / A312M 

(Standard Specification for Seamless and Welded Austenitic Stainless Steel Pipe)

Grade: TP304L (UNS S30403, EN 1.4307) – corrosion resistant austenitic stainless steel pipe

Type:

• 304L Steel Seamless pipe (cold drawn / hot finished)

• 304L Steel Welded pipe (longitudinal or spiral)

Size Range:

• Nominal pipe size (NPS): 1/8″ to 48″

• Wall thickness schedules: Schedule 10 / 40 / 80 and other schedules

• WT range: 1.0 – 60 mm (or as per ASME B36.10 / B36.19)

• OD / ID: As per standard pipe dimensions; custom sizes available

Surface: Annealed, pickled, bright annealed (polished optional – e.g., 304L polished stainless steel pipe for hygienic service)

Testing: Chemical composition analysis (low carbon verified: ≤0.03% C), Mechanical test (tensile, hardness), Flattening test (for welded pipe), Hydrostatic or nondestructive electric test (NDE), Dimensional inspection

Applications

(1)Chemical industry – ASTM A312 TP304L seamless pipe (low carbon ≤0.03%) resists intergranular corrosion after welding, ideal for transporting acids and alkalis without post-weld heat treatment.

(2)Oil and gas – 304L corrosion resistant pipe, available in schedule 10/40/80, is used for onshore/offshore flow lines and platform piping, offering good weldability in mildly sour service.

(3)Food and beverage – Polished 304L stainless steel pipe with smooth ID/OD finish prevents bacterial growth, widely used for dairy, beer, and juice transfer lines.

(4)Water treatment – 304L austenitic seamless pipe (precise OD/ID) serves in RO skids and chemical dosing lines, resisting chlorinated water and wastewater corrosion.

(5)Heat exchanger – ASTM A213 TP304L tube or small-diameter pipe provides thermal stability and oxidation resistance, used in shell-and-tube exchangers and HVAC coils.

(6)Pharmaceutical – Cold drawn 304L pipe ensures tight tolerances for WFI and purified water loops, with low carbon content maintaining weld integrity in clean-room systems.

(7)Architectural – Schedule 10 polished 304L pipe (bright annealed or #4 finish) is used for handrails and balustrades, combining formability with light weight.

Why Choose 304L?

As a 304L corrosion resistant stainless steel pipe, it outperforms carbon steel in moist or acidic conditions. As a 304L austenitic stainless steel pipe, it maintains toughness from cryogenic temperatures to elevated heat (e.g., heat exchanger service). Whether you need a stainless steel 304L pipe supplier for seamless, welded, or polished products, this grade offers a cost-effective balance of performance and longevity.

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