Manufacturer, Supplier & Exporter of Stainless Steel304L Spool

Stainless Steel 304L Spool is a low-carbon variant of the 304 austenitic stainless steel. The “L” stands for low carbon, which significantly reduces the risk of sensitization — a phenomenon where chromium carbides precipitate at grain boundaries during welding. This makes 304L ideal for welded spools (prefabricated pipe modules) because it retains excellent corrosion resistance even after welding..

In the domestic Indian market, 304L spools serve a diverse range of cities. Industrial hubs such as Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, and Ahmedabad heavily demand corrosion‑resistant stainless steel for process piping, chemical, and food‑grade applications. Riddhi Siddhi Impex’s reach in these cities ensures a strong supply chain for 304L spools, helping to support both established and emerging industrial projects..

Further, 304L spools are also relevant in other important domestic centers like Surat, Vadodara, Rajkot, which have strong chemical and petrochemical industries. In central India — cities like Nagpur, Indore, and Bhopal — demand for stainless steel is rising in pharmaceutical, water treatment, and food processing sectors. In the northern and eastern regions (Jaipur, Kanpur, Lucknow, Agra, Varanasi) too, Riddhi Siddhi Impex can supply 304L to industries requiring reliable, weld-friendly stainless steel components...

Stainless Steel 304L Spool is a low-carbon austenitic stainless steel, widely recognized for its excellent corrosion resistance and superior weldability. The “L” in 304L indicates low carbon content, typically less than 0.03%, which minimizes carbide precipitation during welding and prevents intergranular corrosion. This property makes it highly suitable for prefabricated spools used in industrial piping systems, chemical plants, and power plants, where reliability and long-term performance are crucial...

Riddhi Siddhi Impex, a leading supplier and manufacturer in India, offers high-quality 304L spools tailored to customer specifications. They provide customization in dimensions, wall thicknesses, and finishes, ensuring seamless integration into client projects. Their spools are fabricated to meet stringent standards, including ASTM A312 TP 304L and equivalent international specifications, making them suitable for diverse applications across multiple industries.

Stainless Steel 304L Spool

Specification

Property	Details
Product Name	Stainless Steel 304L Spool
Manufacturer / Supplier	Riddhi Siddhi Impex
Base Material	Stainless Steel 304L (ASTM A312 / A269 / A213)
Finish	2B, BA, No.4, Mirror (customized available)
End Type	Plain End (PE), Beveled End (BE), Threaded
Application	Chemical, Pharmaceutical, Water Treatment, Food Processing, Architectural Piping

Chemical Composition

Element	Content (%)
Carbon (C)	0.03 Max
Chromium (Cr)	18–20
Nickel (Ni)	8–12
Manganese (Mn)	2 Max
Phosphorus (P)	0.045 Max
Sulfur (S)	0.03 Max
Silicon (Si)	1 Max

Mechanical Properties

Property	Value
Tensile Strength	515–720 MPa
Yield Strength	205 MPa Min
Elongation	40% Min
Hardness	≤ 95 HRB

Dimension Chart (Nominal)

Nominal Pipe Size (NB)	Outside Diameter (mm)	Wall Thickness (mm)	Length
1/2"	21.3	2.77	Up to 12 m
1"	33.4	3.38	Up to 12 m
2"	60.3	3.91	Up to 12 m
4"	114.3	6.02	Up to 12 m
6"	168.3	7.11	Up to 12 m
8"	219.1	8.18	Up to 12 m

Equivalent Grades

Standard	Grade
ASTM	A312 TP 304L / A269 TP 304L
UNS	S30403
EN	X2CrNi18-9

Equivalent Standards

Standard	Description
ASTM A312 / A269 / A213	Seamless and Welded Austenitic Stainless Steel Pipes
EN 10216-5	Seamless Steel Tubes for Pressure Purposes

Other Types

Type	Description
SS 304 Spool	Standard austenitic stainless steel piping for general corrosion resistance
SS 316 / 316L Spool	Higher corrosion resistance with molybdenum addition for chemical and marine applications
SS 310 Spool	Heat-resistant stainless steel suitable for high-temperature applications

304L spools are characterized by a precise chemical composition: chromium content ranges from 18–20%, nickel from 8–12%, and very low carbon content under 0.03% to maintain weldability and corrosion resistance. Small amounts of manganese, silicon, and phosphorus are also present, balancing mechanical strength and ductility. This combination makes the material suitable for aggressive chemical and environmental conditions.

Frequently Asked Questions (FAQs)

Q1: What are the common applications of Stainless Steel 304L Spools?

A1: Stainless Steel 304L spools are used in chemical, pharmaceutical, food processing, water treatment, and architectural piping systems due to excellent corrosion resistance and weldability.

Q2: Can you supply custom dimensions and finishes?

A2: Yes, Riddhi Siddhi Impex provides SS 304L spools in custom diameters, wall thicknesses, lengths, and surface finishes as per project requirements.

Q3: Which Indian cities do you supply Stainless Steel 304L spools to?

A3: We supply to Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Nagpur, and other domestic cities across India.

Q4: What standards do Stainless Steel 304L spools conform to?

A4: Our SS 304L spools conform to ASTM A312 TP 304L, A269 TP 304L, A213, UNS S30403, and equivalent EN standards, ensuring global compatibility.