Manufacturer, Supplier & Exporter of Stainless Steel317L Spool

Stainless Steel 317L Spool is a high-performance, low-carbon molybdenum-bearing alloy known for its exceptional corrosion resistance and strength in chloride-containing and acidic environments. The higher molybdenum content in 317L makes it more resistant to pitting, crevice corrosion, and chemical attack compared to SS 316 and 316L grades. These properties make Stainless Steel 317L Spools an ideal solution for industries handling corrosive chemicals, high-temperature fluids, and aggressive process media. The low carbon level prevents carbide precipitation during welding, ensuring long-term reliability in high-temperature applications..

Riddhi Siddhi Impex is a trusted manufacturer and supplier of Stainless Steel 317L Spools in India, offering premium-quality fabricated spool assemblies manufactured using state-of-the-art equipment and advanced welding techniques. Their production facility is equipped with CNC cutting tools, precision welding machines, and quality-testing departments that help manufacture dimensionally accurate, durable, and perfectly aligned 317L spools. Every spool is designed to withstand critical working pressures, temperature fluctuations, and corrosive exposure, making them suitable for chemical, petrochemical, and pharmaceutical industries..

The company specializes in producing custom SS 317L Spool assemblies, designed exactly per project specifications, including pipe diameter, wall thickness, spool lengths, bends, fittings, flanges, reducers, elbows, tees, and end connections. Riddhi Siddhi Impex understands that each industrial application requires specific spool configurations, which is why they provide tailor-made fabrication solutions. Whether the requirement is for large pipeline networks, heat exchanger connections, chemical transfer lines, or high-temperature processing equipment, the company ensures that every spool fits accurately and performs reliably...

Riddhi Siddhi Impex follows stringent quality control measures to maintain the highest manufacturing standards for Stainless Steel 317L Spools. Each spool undergoes multiple tests, such as Positive Material Identification (PMI), destructive and non-destructive testing, dimensional accuracy checks, weld inspection, hardness tests, and hydrostatic pressure testing when required. Every spool is delivered with complete documentation, including test certificates complying with EN 10204, ensuring full traceability and compliance with international standards such as ASTM A312, ASME SA312, and related norms..

Stainless Steel 317L Spools from Riddhi Siddhi Impex are highly valued for their superior resistance to sulfuric acid, acetic acid, formic acid, chlorides, and other aggressive chemicals. This makes them widely used in industries such as pulp and paper processing, chemical and petrochemical plants, food and beverage production, textile processing, pollution control systems, and heat exchanger networks. Their superior mechanical strength enables them to function efficiently under high pressure and elevated temperatures, maintaining structural stability for long-term service..

Stainless Steel 317L Spool

Specification

Product Name	Stainless Steel 317L Spool
Manufacturer / Supplier	Riddhi Siddhi Impex
Material Grade	Stainless Steel 317L (UNS S31703)
Standards	ASTM A312 / A213 / A269 / ASME SA312
Size Range	1/2” NB to 24” NB (Custom Fabricated)
Wall Thickness	Sch 10, Sch 20, Sch 40, Sch 80, Sch 160, XXS
Spool Type	Fabricated, Welded, Seamless, Custom Spool Assembly
End Connections	Flanged, Beveled End, Threaded, Plain End
Surface Finish	Mill Finish / Polished / Pickled & Passivated
Applications	Chemical Plants, Petrochemical Industries, Marine Lines, Acid Processing, Heat Exchangers

Chemical Composition (SS 317L)

Element	Content (%)
Carbon (C)	0.03 Max
Manganese (Mn)	2.00 Max
Phosphorus (P)	0.045 Max
Sulfur (S)	0.03 Max
Silicon (Si)	0.75 Max
Chromium (Cr)	18.0 – 20.0
Nickel (Ni)	11.0 – 15.0
Molybdenum (Mo)	3.0 – 4.0
Nitrogen (N)	0.10 Max

Mechanical Properties

Property	Value
Tensile Strength	≥ 515 MPa
Yield Strength	≥ 205 MPa
Elongation	≥ 35%
Hardness	≤ 95 HRB
Corrosion Resistance	Excellent in chloride & acidic environments
Weldability	Superior – Low carbon prevents carbide precipitation

Dimension Chart (Nominal)

Nominal Pipe Size (NB)	Outside Diameter (mm)	Wall Thickness (mm)	Spool Length
1/2"	21.3	2.77	Custom Length
1"	33.4	3.38	Custom Length
2"	60.3	3.91	Custom Length
4"	114.3	6.02	Custom Length
6"	168.3	7.11	Custom Length
10"	273.1	9.27	Custom Length
16"	406.4	12.70	Custom Length

Equivalent Grades

Standard	Grade
ASTM	317L / UNS S31703
EN	1.4438
JIS	SUS 317L
BS	317S11
ISO	317L

Equivalent Standards

Standard	Description
ASTM A312	Seamless/Welded Austenitic Stainless-Steel Pipes
ASTM A213	Austenitic Stainless Heat Exchanger & Boiler Tubes
ASME SA312	Pressure Piping Stainless Steel Specification
EN 10216-5	Seamless Stainless Steel Tubes for Pressure Purposes

Other Types of Stainless Steel Spools

Type	Description
Stainless Steel 304 Spool	General corrosion-resistant spool for mild environments
Stainless Steel 304L Spool	Low carbon grade ideal for welding applications
Stainless Steel 316L Spool	Superior corrosion resistance with excellent weldability
Stainless Steel 316Ti Spool	Titanium-stabilized for high-temperature stability
Duplex Steel Spool	High strength and corrosion resistance for harsh environments
Super Duplex Spool	Excellent performance in offshore and marine sectors

As a leading Stainless Steel 317L Spool Domestic Supplier, Riddhi Siddhi Impex supplies its products across a vast domestic market in India. They cater to industries and project sites located in Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Ankleshwar, Navsari, Valsad, Narmada, and Rajpipla. Their strong logistics and dedicated supply chain allow them to deliver bulk and urgent orders promptly..

Frequently Asked Questions (FAQs)

Q1: What are the applications of Stainless Steel 317L Spool?

A1: SS 317L spools are widely used in chemical plants, pulp and paper industries, petrochemical units, marine pipelines, heat exchangers, and acid processing units.

Q2: Do you provide customized 317L spool fabrication?

A2: Yes, we offer complete customization including size, thickness, fittings, flanges, and spool design based on project requirements.

Q3: What is the advantage of 317L over 316L?

A3: Stainless Steel 317L contains higher molybdenum content, offering significantly better resistance to pitting, crevice corrosion, and chemical attack.

Q4: Do you supply SS 317L spools across India?

A4: Yes, we supply to all major cities such as Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nashik, and many more.