SS 304L Seamless Pipes Manufacturer & Supplier

Stainless Steel 304L seamless pipe is a low-carbon austenitic stainless steel conduit manufactured to ASTM A312 / ASME SA312, designated as TP304L (UNS S30403). This alloy contains 18.0 to 20.0% chromium and 8.0 to 12.0% nickel, with carbon limited to a maximum of 0.030%. Its low carbon content stops chromium carbide precipitation during welding and protects the heat-affected zone from intergranular corrosion.

Sachiya Steel International, a Mumbai-based manufacturer, supplier, stockist, and exporter of Stainles Steel 304L seamless pipes, has over two decades of experience. Schedules and capacity allow us to carry 1,500 to 2,000 metric tonnes. We ship all orders with detailed traceability and EN 10204 3.1 mill test certificates. This keeps your project records correct and ready for inspection or audit.

ASTM A312 TP304L seamless pipes deliver 485 MPa (70 ksi) minimum tensile strength, 170 MPa (25 ksi) yield, and ~35% elong. Their seamless build removes weld seams, ensuring consistent grain and superior pressure-handling capacity. Schedule 5S, 10S, 40S, 80S, 120, 160, and XXS NPS sizes span 1/8" to 24". Standard length remains 6 meters (20 feet), cut-to-length. Mill, 2B, bright annealed (BA), and No. 4 polished finishes are ready. PE, butt-welding BE, and ASME B1.20.1 threaded ends serve as your end connections.

Our operations hold ISO 9001, ISO 14001, and ISO 45001 certifications. SS 304L Seamless Pipe serves various industries, including chemical processing, oil and gas, food and beverage, pharmaceutical, power generation, and water treatment sectors. Explore the technical and commercial details of 304 and 304L stainless steel through the following sections:

Specification
Pricing
Chemical Composition
Mechanical Properties
Equivalent Designations
Industrial applications
Shipping & Packaging
Frequently Asked Questions

Stainless Steel 304L Seamless Pipe Specifications

The table below summarises the standard specifications for SS 304L seamless pipes supplied by Sachiya Steel International.

Parameter	Details
Standard	ASTM A312 / ASME SA312
Dimensional Standard	ASME B36.19M
Size Range	1/8" to 24" NPS (DN 6 to DN 600)
Schedules	5S, 10S, 40S, 80S, 120, 160, XXS
Length	6 metres (20 feet); random and cut-to-length
End Type	Plain End, Bevelled End, Threaded (NPT)
Finish	Mill Finish, 2B, BA, No. 4 Polished
Form	Cold-Drawn Seamless, Hot-Finished Seamless

Pipe Dimensions

This table provides the specific dimensional range for SS 304 smls high-temperature pipes. Sizes above 14" NPS are typically hot-finished, while smaller diameters utilise cold-drawing for tighter tolerances. All dimensions strictly adhere to ASME B36.19M and B36.10M standards for industrial compatibility.

Parameter	Range
Nominal Pipe Size (NPS)	1/8" to 24" (DN6 to DN600)
Outside Diameter (OD)	10.3 mm to 609.6 mm
Schedules	5S, 10S, 40S, 80S, 160S, XXS
Wall Thickness	1.24 mm to 38.89 mm
Standard Lengths	6-metre single random, 12-metre double random
Custom Lengths	Precision cut-to-length available on request

Schedule Chart

Representative wall thickness values per ASME B36.19M for common NPS sizes are listed below.

NPS	OD (inch / mm)	SCH 10S WT	SCH 40S WT	SCH 80S WT
1/2"	0.840 / 21.3	0.065"	0.109"	0.147"
1"	1.315 / 33.4	0.109"	0.133"	0.179"
2"	2.375 / 60.3	0.109"	0.154"	0.218"
4"	4.500 / 114.3	0.120"	0.237"	0.337"
8"	8.625 / 219.1	0.148"	0.322"	0.500"

Weight Chart

Pipe weight per metre for SS 304L seamless pipes, based on standard wall thickness values.

NPS	SCH 10S (kg/m)	SCH 40S (kg/m)	SCH 80S (kg/m)
1/2"	0.80	1.27	1.62
1"	2.09	2.50	3.24
2"	3.93	5.44	7.48
4"	8.63	16.07	22.32
8"	20.06	42.55	64.64

Stainless Steel 304L Seamless Pipe Price

The cost of SS 304L seamless pipes in India is between Rs. 310 and Rs. 350 per kilogram, including GST. The final price depends on the outside diameter, wall thickness, schedule, quantity, and current market rates for nickel and chromium. International purchasers may request prices for either CIF or FOB. For a quote that is tailored to your project, please contact our sales team.

Chemical Composition of Stainless Steel 304L Seamless Pipes

The chemical composition of SS 304L (UNS S30403), compliant with ASTM A312/ASME SA312, is as follows, featuring a low-carbon profile to ensure superior weldability and corrosion resistance.
304L seamless pipes contain 18.0–20.0% chromium and 8.0–12.0% nickel. While manganese, silicon, and nitrogen provide structural stability and corrosion resistance, the low carbon limit of 0.030% ensures excellent weldability for all your specific industrial projects.

Carbon C

0.030% max

Manganese Mn

2.00% max

Phosphorus P

0.045% max

Sulfur S

0.030% max

Silicon Si

1.00% max

Chromium Cr

18.0 - 20.0%

Nickel Ni

8.0 - 12.0%

Nitrogen N

0.10% max

Mechanical Properties of Stainless Steel 304L Seamless Pipes

ASTM A312 TP304L seamless pipes meet the following minimum mechanical property requirements.
TP304L seamless pipes offer a minimum Tensile Strength of 70 ksi (485 MPa) and Yield Strength of 25 ksi (170 MPa), combined with ~35% Elongation and a maximum 90 HRB Hardness rating.

70 / 485

ksi / MPa (min)

Tensile Strength

25 / 170

ksi / MPa (min)

Yield Strength

35%

(min)

Elongation in 2"

HRB (max)

Hardness

Property	Value (Imperial)	Value (Metric)
Tensile Strength (min)	70 ksi	485 MPa
Yield Strength, 0.2% offset (min)	25 ksi	170 MPa
Elongation in 2" (min)	35%	35%
Hardness (max)	Typical 90 HRB	Typical 90 HRB

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Equivalent Grades of Stainless Steel 304L Seamless Pipes

SS 304L is recognised under several international designations. The table below maps equivalent grades across standards.

Standard	Designation
EN 10088	1.4307 / X2CrNi18-9
UNS	S30403
DIN	X2CrNi18-9
EN 10088 (alt)	1.4306 / X2CrNi19-11
JIS G 3459	SUS 304L
AFNOR	Z3CN18-10

Industrial Applications of SS 304L Seamless Pipes

Grade 304L seamless pipes provide essential corrosion resistance in chemical processing, food production, and standard industrial water systems, facilitating critical piping applications. For more technical details, visit the source website.

Chemical and Petrochemical Processing

Handles organic acids and alkaline solutions in high-temperature reactor feed lines and distillation.

Oil & Gas and Power Generation

Utilised for low-pressure utility lines and treated gas transport where hydrogen sulphide is absent and basic corrosion resistance is required.

Food, Beverage and Pharmaceutical

Meets sanitary standards for piping that resists clean-in-place chemicals and prevents product contamination.

Power Generation

Ideal for steam and condensate piping systems due to its high-temperature structural integrity.

Water Treatment

This pipe's corrosion resistance is very important and reliable for desalination plants and industrial wastewater management piping systems.

Shipping & Packaging

Heavy-duty wooden boxes Packing

Export Packaging Standard

We strictly follow seaworthy export handling standards to protect SS 304L seamless pipe from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

Heavy-duty wooden boxes with moisture barrier lining
HDPE stretch film wrapping on all bundles
Plastic end caps on threaded and plain-end pipes
Silica gel desiccants to minimize moisture exposure
ISPM-15 fumigated wooden packaging for export

Pipe Bundle Yard Staging

Container End-Cap Protection

Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies stainless steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

USA
Canada

Frequently Asked Questions:

What is the Difference Between 304 and 304L Seamless Pipe? +

The primary difference is carbon content. 304L has a maximum of 0.030% carbon, while standard 304 allows up to 0.08%. Lower carbon in 304L prevents sensitisation during welding, which eliminates the risk of intergranular corrosion in welded piping systems.

What does L stand for in 304L SS Pipe? +

The "L" stands for "Low carbon." It indicates that the grade's carbon content is capped at 0.030%, compared to 0.08% in standard 304.

What Sizes are Available for SS 304L Seamless Pipes? +

Sachiya Steel International maintains a stock of SS 304L seamless pipes in diameters ranging from 1/8" to 24" NPS, and in schedules 5S, 10S, 40S, 80S, 120, 160, and XXS. Standard length is 6 metres (20 feet). Custom lengths are available on request.

What is the Price of SS 304L Seamless Pipes per Kg? +

In India, prices typically range from Rs. 310 to Rs. 350 per kg. The final price varies based on pipe size, schedule, quantity, finish, and current raw material costs.

Can SS 304L Seamless Pipes Be Welded Without Post-Weld Heat Treatment? +

Yes. SS 304L's low carbon content (0.030% max) ensures PWHT isn't required for most applications. It resists carbide precipitation in the weld zone and maintains full corrosion resistance as-welded, which simplifies most of your projects.

What is the Maximum Operating Temperature for SS 304L Seamless Pipes? +

SS 304L seamless pipes are rated for continuous service. While oxidation limits reach 870°C, ASME B31.3 restricts 304L pressure piping to 425–540°C to maintain structural integrity and avoid high-temperature creep risks.

What is the ASTM Specification for SS 304L Seamless Pipes? +

The primary specification is ASTM A312 / ASME SA312, which covers seamless austenitic stainless steel pipes. ASTM A376 / ASME SA-376 applies when pipes are intended for high-temperature central-station service.