Stainless Steel 304L Pipes & Tubes

Stainless Steel 304L Pipes & Tubes

Amardeep Steel Centre LLP is a Mumbai based manufacturer, stockist and exporter of stainless steel 304L pipes and tubes, the low carbon variant of 18-8 austenitic stainless steel that is the industry default wherever pipework is welded on site. Restricting carbon to 0.03% max prevents chromium carbide precipitation, known as weld decay or sensitization, in the heat affected zone, so a welded joint in Stainless Steel 304L Pipes & Tubes keeps corrosion resistance close to that of the parent metal, without post-weld annealing. That single property is why SS 304L pipe is specified across chemical plants, food and pharma lines, water treatment, and cryogenic and offshore piping.

We supply SS 304L Pipes & Tubes as seamless, welded (ERW), and EFW/LSAW construction, to ASTM A312 / ASME SA312 (pipe), ASTM A358 / ASME SA358 (EFW), and ASTM A213 / A249 / A269 (Stainless Steel 304L Tubes), in UNS S30403 / Werkstoff 1.4306 & 1.4307 chemistry, sizes 1/8" NB to 24" NB and Schedules 5S through XXS. Every dispatch carries a Mill Test Certificate to EN 10204 3.1, with NACE MR0175 sour service and third-party inspection (SGS, BV, DNV, Lloyd's) available on request through our quality testing and certification process. You can also review our quality certifications or request a quote for current pricing on your size and quantity.

Request a Quote

What Is Stainless Steel 304L Pipe?

Stainless steel 304L pipe is an austenitic chromium nickel alloy (17.5 to 20% Cr, 8 to 12% Ni) that differs from standard Grade 304 only in its carbon ceiling: 0.03% instead of 0.08%. That lower carbon content is what lets stainless steel 304L pipes be welded in the field without a stress relief or solution annealing step, at a small trade-off in tensile and yield strength versus 304. If you are weighing 304L against other common grades before you specify, our guide to 304 vs 316 stainless steel and our wider stainless steel grades and properties reference both cover how strength, cost and corrosion resistance shift across the family. 

SS 304L Pipe & Tube Specification

Types of SS 304L Pipes: Seamless, Welded & EFW

SS 304L Seamless Pipe is drawn or extruded from a solid billet with no longitudinal joint, giving the highest pressure rating for a given wall thickness, which makes it the default choice for high-pressure process lines within our stainless steel seamless pipes & tubes range. SS 304L Welded (ERW) Pipe, part of our broader stainless steel welded pipes & tubes range, is roll-formed and fusion-welded from strip or plate; because it is 304L, the weld itself does not need post-weld annealing to retain corrosion resistance, which keeps lead times and cost down on large bore lines. EFW/LSAW pipe extends the same benefit to sizes up to 100" NB for tanks, large ducting and structural piping. If you are still deciding which construction fits your project, our explainer on the difference between seamless and welded pipe walks through the trade-offs in strength, cost and lead time.

Chemical Composition of SS 304L Pipes & Tubes

The restricted carbon and controlled nickel/chromium balance shown above are what separate 304L from standard 304 and from higher-alloy grades such as 316L, which adds molybdenum for extra resistance to chlorides and pitting.

Mechanical Properties of SS 304L Pipes & Tubes

Physical Properties of SS 304L Pipes & Tubes

For weight and volume calculations see our reference on the density of stainless steel.

Equivalent Grades for SS 304L Pipes & Tubes

SS 304L Pipe Size & Weight Chart

Representative sizes are listed below; the full 1/8" NB to 24" NB chart, plus square, rectangular and tube sizes, is provided on quotation.

For a size not shown, use our steel weight calculator or the full pipe dimension chart.

Dimensional Tolerances (ASTM A312)

Surface Finish Options

SS 304L Pipe Pressure Ratings (ASME B31.3)

Figures are indicative per ASTM A312 TP304L. Confirm exact design pressure against ASME B31.3 or with our technical team before specifying.

Applications of SS 304L Pipes & Tubes

• Chemical & petrochemical plants: process piping for acids and alkalis, welded on site without post-weld heat treatment
• Food, beverage & pharmaceutical: hygienic lines for processing, brewing, dairy and API manufacturing, with FDA compliant finishes available
• Water treatment & desalination: potable water, RO systems and wastewater piping
• Oil & gas: onshore and offshore platforms, refineries and LNG facilities
• Cryogenic service: LNG transfer lines and cryogenic storage down to -196°C
• Power generation: heat exchangers, condensers and feedwater lines
• Architecture & construction: structural tubing, handrails and marine grade cladding

Most SS 304L piping systems are specified alongside matching fittings and flanges of the same grade, so welded joints stay free of weld decay end to end. If your project needs the rest of the system, we also supply stainless steel 304L flanges, 304L buttweld fittings, stainless steel 304L plates, sheets & coils for tank and vessel fabrication, and SS 304L coil tubing for instrumentation and small bore runs. Where chloride exposure is higher, such as coastal or marine sites, compared against stainless steel 316L pipes & tubes, which adds molybdenum for extra pitting resistance.

Testing, Inspection & Certification

All SS 304L pipes and tubes from Amardeep Steel Centre are tested and dispatched with full documentation:

• Chemical analysis (spectrometric)
• Tensile and yield strength testing
• Hardness testing (Rockwell B / Brinell)
• Hydrostatic / pneumatic leak test
• Eddy current test (seamless tubes) and ultrasonic test (UT) on request
• Intergranular corrosion (IGC) test per ASTM A262
• NACE MR0175 / ISO 15156 sour service compliance, and cryogenic impact testing at -196°C, on request

Documentation supplied includes a Mill Test Certificate (EN 10204 3.1), Certificate of Conformance, and packing/origin list, with third-party inspection from SGS, Bureau Veritas, DNV or Lloyd's available. Full detail on our testing and certification process is available on the testing and certifications pages.

Packaging & Marking

Pipes are packed in wooden crates or bundles with strapping, end caps and waterproof wrap for sea-worthy export, or as per buyer instruction. Every length is marked with size, schedule, specification, grade, heat number and manufacturer identification for full traceability.

Stainless Steel 304L Pipe Price List (Indicative)

Prices vary with size, schedule, finish, quantity and current LME nickel/molybdenum rates, so the figures above are indicative. Request a quote for a firm, size specific price on stainless steel 304L pipes and tubes.

Related Products

SS 304L Buttweld Fittings, SS 304L Forged Fittings, SS 304L Flanges, SS 304L Plates, Sheets & Coils, SS 304L Coil Tubing, SS 304, SS 304H, SS 316, SS 316L, SS 316H, SS 321, Stainless Steel Pipes & Tubes