Stainless Steel Pipes Manufacturer & Exporter

Leoscor Alloy Pipes is a leading supplier, stockist, and exporter of high-quality Stainless Steel Pipes in Mumbai, India, serving customers across more than 65 countries worldwide. We maintain a comprehensive inventory of stainless steel pipes manufactured according to international standards, including ASTM A312, ASTM A358, ASTM A789, and ASTM A790.

Our Stainless Steel Pipes are available in various grades, including SS 304, SS 304L, SS 316, SS 316L, SS 317L, SS 321, SS 347, SS 310S, and SS 904L. We supply pipes in sizes ranging from NPS 1/8” to 30” in seamless, welded, ERW, and EFW configurations to meet diverse industrial requirements.

Leoscor Alloy Pipes, every stainless steel pipe undergoes strict quality inspection and is supplied with an EN 10204 3.1 Mill Test Certificate along with a traceable heat number to ensure complete material authenticity and reliability.

High-Quality Stainless Steel Pipes for Industrial Applications

Our Stainless Steel Pipes are widely recognized for their excellent corrosion resistance, dimensional accuracy, high strength, and long service life. We offer a wide range of stainless steel piping solutions, including seamless, welded, cold drawn, electropolished, ERW, and EFW pipes, suitable for critical industrial applications.

Our Stainless Steel Seamless Pipes are available in various grades such as SS 304 Pipes, SS 316 Pipes, SS 317 Pipes, SS 316Ti Pipes, SS 347 Pipes, SS 410 Pipes, and SS 446 Pipes. These pipes are supplied in different shapes, including round, square, rectangular, oval, and hollow sections.

These stainless steel pipes are widely used in industries such as petrochemical plants, power generation units, steel plants, railways, sugar industries, fertilizer plants, defense applications, automotive industries, and general engineering sectors.

OUR RANGE OF STAINLESS STEEL PIPES

Popular Stainless Steel Pipe Grades

UNS Standard Stainless Steel Pipes

DIN Standard Stainless Steel Pipes

SUS Standard Stainless Steel Pipes

Why Buy Stainless Steel Pipes from Leoscor Alloy Pipes

Leoscor Alloy Pipes is a trusted stockist, distributor, and supplier of Stainless Steel Pipes from India, with decades of experience serving global industries. Our focus on quality, reliable supply, and customer satisfaction ensures dependable piping solutions.

Key advantages of choosing us:

Extensive inventory of standard sizes and grades
Reliable sourcing from reputed manufacturers
Strict quality control and experienced professionals
Strong logistics and timely delivery support
Modern infrastructure with large storage capacity
ISO 9001:2015 certified companyContact us – info@leoscoralloypipes.com

Contact Us

Stainless Steel Welded Pipes and Advanced Manufacturing

Leoscor Alloy Pipes supplies premium-quality Stainless Steel Welded Pipes manufactured using modern tube mill technology and automated production processes. These pipes offer excellent dimensional accuracy, consistent weld quality, and dependable performance for industrial piping systems.

We manufacture and supply stainless steel pipes using high-performance materials, including super ferritic stainless steel, super austenitic stainless steel, titanium alloys, and super duplex stainless steel. By using high-grade raw materials, we ensure superior durability and extended service life of our products.

Stainless Steel ERW and EFW Pipes

Our range also includes reliable Stainless Steel ERW Pipes and Stainless Steel EFW Pipes, designed to deliver excellent strength, precision, and performance in demanding applications. These pipes are available in different sizes, specifications, and finishes to meet customized industrial requirements.

As an experienced Stainless Steel Pipes Manufacturer, Supplier, and Exporter, Leoscor Alloy Pipes follows strict quality testing procedures to ensure that every product meets international standards and customer expectations.

Contact Leoscor Alloy Pipes for high-quality stainless steel pipe solutions, customized requirements, and competitive pricing.

What we hold in stock

Specifications	Details
Standards	ASTM A312, A358, A376, A409, A778, A554 and the matching ASME SA specifications
Size Range	NPS 1/8″ to 30″ (6 mm to 750 mm NB)
Schedules	SCH 5S, 10S, 40S, 80S, 40, 80, 160, XXS
Forms	Seamless, Welded, ERW, EFW, Cold Drawn, Electropolished
Shapes	Round, Square, Rectangular, Oval, Hexagonal, Hollow Section
Lengths	Single Random (5 to 7 m), Double Random (8 to 13 m), Cut to Length
End Finish	Plain End, Bevelled, Threaded, Capped
Surface	Pickled and Passivated, Mill Finish, Polished, Electropolished
Certification	EN 10204 3.1 as Standard, 3.2 on Request

Choosing the right stainless steel grade

Most piping failures we hear about are not manufacturing defects. They are grade selection mistakes, usually chlorides attacking a grade that was never meant to handle them. The table below is the shortcut our own team uses when a customer describes their service condition.

PREN stands for pitting resistance equivalent number. It is calculated from chromium, molybdenum and nitrogen content, and it gives you a quick way to compare how well a grade will hold up against chloride pitting. Higher is better.

Grade	UNS	PREN (approx.)	Pick it when
304 / 304L	S30400 / S30403	18 to 20	General plant, food and dairy, potable water, nitric acid. No chlorides.
316 / 316L	S31600 / S31603	24 to 26	Chlorides are present but mild. Coastal air, chlorinated water, most chemical service.
317L	S31703	29 to 31	316L is corroding faster than expected. Higher molybdenum buys margin.
321 / 321H	S32100 / S32109	18 to 20	Welded assemblies that then run hot. Titanium stabilisation stops carbide precipitation.
347 / 347H	S34700 / S34709	18 to 20	Same problem as 321, but you need more creep strength. Niobium stabilised.
310 / 310S	S31000 / S31008	24 to 26	Furnace and kiln service. Sustained oxidation resistance to roughly 1050 C.
904L	N08904	34 to 36	Sulphuric and phosphoric acid. Copper addition helps in reducing conditions.
254 SMO	S31254	42 to 44	Seawater, brine, bleach plants. Where 316L pits within months.

Sizes and wall thicknesses

Wall thicknesses follow ASME B36.19M for stainless schedules and B36.10M for the heavier walls. These are our fastest moving sizes. Anything outside this can be sourced, though lead times run longer.

NPS	OD (mm)	SCH 5S	SCH 10S	SCH 40	SCH 80
1/2″	21.3	1.65	2.11	2.77	3.73
1″	33.4	1.65	2.77	3.38	4.55
2″	60.3	1.65	2.77	3.91	5.54
3″	88.9	2.11	3.05	5.49	7.62
4″	114.3	2.11	3.05	6.02	8.56
6″	168.3	2.77	3.40	7.11	10.97
8″	219.1	2.77	3.76	8.18	12.70
10″	273.1	3.40	4.19	9.27	15.09
12″	323.9	3.96	4.57	10.31	17.48

All wall thicknesses in millimetres. To work out weight, use this: kg per metre = (OD minus WT) x WT x 0.0248, with both dimensions in mm. A 6″ SCH 40 pipe works out to about 28.4 kg per metre.

Full charts are on our technical data page.

Industries we supply

Our stainless pipe goes into chemical and petrochemical plants, refineries, fertiliser and sugar plants, power stations, pharmaceutical and food processing facilities, water treatment works, pulp and paper mills, shipyards and desalination projects. Client lists include Shell, Saudi Aramco, ONGC, ADNOC, Qatar Petroleum, Petrofac and Kuwait Oil Company.

Frequently asked questions

Which stainless steel grade should I use for my pipeline?

Start with the fluid and the temperature. For general plant service, potable water, food and dairy with no chlorides present, 304 or 304L is enough. Once chlorides enter the picture, move to 316 or 316L. If 316L is still corroding, step up to 317L or 904L. For seawater and brine, you need 254 SMO or a super duplex grade. For furnace and kiln work above 900 C, use 310S.

What is the difference between stainless steel pipe and stainless steel tube?

Pipe is ordered by nominal pipe size and schedule, and it is built to carry fluid, so the inside diameter is what the designer cares about. Tube is ordered by exact outside diameter and wall thickness, held to tighter tolerances, and it is used in heat exchangers, boilers, instrumentation and mechanical work. A 2 inch pipe and a 2 inch tube have different dimensions and are not interchangeable.

Should I specify seamless or welded stainless steel pipe?

Below about 8 inch the price difference is small, so seamless is worth taking. Above 12 inch, seamless gets costly and hard to source, and EFW pipe to ASTM A358 Class 1 carries the same joint quality factor of 1.00 under ASME B31.3. Seamless remains the right choice for high pressure, cyclic loading and sour service.

What is PREN and why does it matter?

PREN is the pitting resistance equivalent number, calculated as chromium plus 3.3 times molybdenum plus 16 times nitrogen, using the percentages in the alloy. It gives a single figure to compare chloride pitting resistance across grades. 304 sits around 18 to 20, 316 around 24 to 26, and 254 SMO around 42 to 44. It is a comparison tool, not a design limit.

Do you supply mill test certificates?

Yes. Every consignment ships with an EN 10204 3.1 mill test certificate showing heat number, chemical analysis and mechanical test results, traceable back to the producing mill. Type 3.2 certification with third party endorsement is available where your contract requires it.

What is the price of stainless steel pipe per kg?

Stainless pricing moves with nickel and chromium on the London Metal Exchange, sometimes week to week, so we do not publish a fixed rate. Price also depends on grade, form, size, schedule, mill origin and quantity. Send your requirement and we will quote against live stock.

What is your minimum order quantity?

There is no fixed minimum for stock items, and we handle both single length trial orders and full container loads. For sizes we have to procure from the mill, minimum quantities apply and we will tell you what they are when we quote.

Get a quote for stainless steel pipes

Send your grade, size, schedule, quantity and destination. Our team replies with current price, available stock and a delivery schedule.

Request a quote | Call +91 22 2386 7540 | Email info@leoscoralloypipes.com