Stainless Steel Pipe, SS Tube Manufacturers in India

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Piyush Steel is among the reputed Stainless Steel pipe manufacturers and suppliers since 1983. We are located in Mumbai, India and export to different markets. We offer wide range of Stainless Steel pipes and tubes in various sizes, grades and specifications. We serve to different sectors like nuclear, thermal, solar, atomic energy, defence and aerospace. These sectors are tough in their piping requirements and we are set up to manufacture that.

Pipes are produced to ASTM A312 and ASME SA312 specifications, which cover seamless and welded pipes for high-temperature and corrosive conditions. For dimensional requirements, we follow ASME B36.19 for wall thickness and outside diameter. We also supply to DIN 17456 and DIN 17457 for projects that need European compliance.

We are ISO 9001 certified and control our own purchasing, stocking and supply. We deal in Stainless Steel, high nickel alloys, APIX65 pipes and rolled products in Carbon Steel. Stock is always held for speedy dispatch on to industrial and construction projects all over the world. We supply regularly to chemical plants, fertiliser units, oil and gas facilities, refineries, paper mills, cement plants, and sugar factories.

Other Types of Stainless Steel Pipes & Tubes

 

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The grades we most commonly supply are 304, 304L, 316, 316L, 321, and 347. We also manufacture SS 309 seamless pipes and SS 310 seamless tubes. Grade 304 contains 18% chromium and 8% nickel. It has good general purpose performance, good oxidation resistance and good corrosion resistance. Grade 316 has additional molybdenum for increased resistance to chlorides and acids. It is a common material used in chemical processing and marine industry. Each grade has its own characteristics. What really needs to be done depends on your application.

We supply small-diameter pipes for medical and instrumentation applications. For heavy industrial or structural work, large-diameter options are available. Pipes can be supplied as seamless, welded, ERW or fabricated. We can custom make tubes to your project’s specifications for size and length.

We manage our supply chain directly, which keeps the Stainless Steel pipe price competitive without affecting material quality or delivery timelines.

Manufacturing Process of Stainless Steel Pipe and Tube

Production starts with raw material selection. Seamless pipes use solid billets or rounds, while welded pipes draw from flat-rolled coils or strip stock. Grade selection at this stage determines the downstream processing route and the final pipe’s corrosion performance.

Seamless pipes go through a hot extrusion or piercing process. A heated billet passes over a piercing mandrel at high pressure, forming a hollow shell. That shell then passes through rolling mills to reach the target wall thickness and outer diameter. No weld seam means uniform mechanical properties throughout the pipe wall, which matters in high-pressure and sour service environments.

Welded pipes follow a different route. In ERW (Electric Resistance Welding), a flat coil strips into a tube shape and the edges fuse under electrical resistance. No filler metal. EFW and LSAW methods use submerged arc or TIG welding for heavier wall thicknesses. For precision instrumentation tubes, TIG or laser welding produces tighter dimensional tolerances and a cleaner internal bore.

After forming, solution annealing heats the pipe to between 1010°C and 1120°C, then rapid quenching restores corrosion resistance lost during welding or hot working. Pickling removes the surface oxide scale using acid treatment. Passivation follows, forming a chromium oxide layer that gives stainless steel its resistance to further oxidation. Straightening, sizing, and finishing operations then bring the pipe to the specified straightness and surface condition, whether mill finish, pickled, or polished.

Before despatch, each pipe undergoes hydrostatic testing at pressures above rated working pressure to confirm weld integrity and freedom from leaks. Dimensional inspection, PMI (positive material identification), and surface checks complete the quality cycle.

Types of Stainless Steel Pipes

Seamless stainless steel pipes suit high-pressure service where weld-free construction reduces failure risk. Common in oil and gas, chemical reactors, and power generation lines.

Welded stainless steel pipes (ERW, EFW, LSAW) cover a wider size range at a lower cost. ERW works well for standard pressure applications. EFW and LSAW handle heavier wall requirements in large-diameter configurations for structural and pipeline use.

Fabricated stainless steel pipes are produced by rolling and welding plate, typically for diameters above 600 mm, where standard mill sizes do not apply. Used in large process vessels and custom ductwork.

Polished stainless steel pipes carry a surface finish of Ra 0.8 µm or finer. Food, pharma, and dairy industries specify these for hygienic service where surface roughness affects bacterial adhesion and cleanability.

Instrumentation tubing has tighter OD tolerances (+/- .1 mm and better) and smooth bores for accurate fluid measurement. With structural pipes, the bore tolerance is not so much of an issue; the key is that they can carry the loads.

High-pressure pipes carry schedule ratings from SCH 80 to SCH 160 or XXS, with wall thicknesses to match. Low-pressure service draws from SCH 5S to SCH 40 depending on fluid and temperature.

Precision capillary tubes have OD values starting from 0.5 mm. They serve in medical devices, analytical instruments, and pilot plant systems where tight dimensional control at very small bore sizes is non-negotiable.

Stainless Steel Pipe Dimensions, Schedules, and Sizes

The sizing of stainless pipe is based on the Nominal Pipe Size (NPS) system where the NPS number is not the actual outside diameter. A 1" NPS pipe has an OD of 33.4 mm, not 25.4 mm. Wall thickness varies by schedule, not by OD, so two pipes of the same NPS but different schedules share the same outer diameter but carry different bore sizes and pressure ratings.

The schedule system runs from SCH 5S through SCH 10, 40, 80, and up to SCH 160 and XXS. Higher schedule numbers mean thicker walls and smaller internal diameters. A 6" NPS SCH 10 pipe carries a wall thickness of 3.40 mm. The same NPS at SCH 160 carries 18.26 mm. Standard lengths run 6 metres or 12 metres with a cutting tolerance of +6 mm / 0 mm under ASTM A312.

Pipe Schedule & Thickness Table

Sizes and wall thicknesses for common NPS and schedule combinations:

Stainless Steel Pipe Material Grades and Equivalents

Each grade covers a distinct combination of corrosion performance, temperature range, and weldability. Select the grade based on your service environment, not general preference.

Mechanical Properties of Stainless Steel Pipes

Grades 304 and 316 share identical minimum tensile and yield strengths but differ in hardness limits and density at elevated temperatures. Both grades meet ASTM A312 mechanical requirements.

Stainless Steel Pipes Industrial Applications

Stainless steel pipes serve across the chemical, oil and gas, petrochemical, food, and pharmaceutical industries. The grade and finish required differ by sector, and so does the specification.

Stainless Steel Pipes for Chemical Processing Applications

Process lines in chemical plants contact acids, alkalis, solvents, and oxidising agents at elevated temperatures. Grade 316/316L is suitable for chloride environments where 304 would eventually pit or crevice corrode. Reactors, heat exchangers, and transfer lines carrying sulphuric acid, hydrochloric acid, or caustic solutions regularly specify 316L seamless pipes. The molybdenum content in 316 pushes the pitting resistance index (PRE) to around 25, compared to 18 for 304, which makes a measurable difference in service life.

Stainless Steel Pipes for Oil and Gas Industry

Offshore and onshore pipeline systems work under high pressure and often in sour service conditions with H2S present. Sour service requires materials meeting NACE MR0175 / ISO 15156 which limits hardness and specifies a controlled microstructure. Duplex and super duplex grades (UNS S31803, S32750) have higher strength as compared to 316L at lower wall thickness and thereby reducing pipe weight in offshore structural applications. ASTM A790 and API 5LC govern duplex pipe supply for these installations.

Stainless Steel Pipes for Petrochemical Plants

Hydrocarbon processing runs at temperatures that can exceed 500°C in some furnace and reformer circuits. Grade 321 with titanium stabilisation resists sensitisation during sustained high-temperature service, where unstabilised grades would suffer intergranular corrosion. Heat exchanger tubing in these plants draws heavily from seamless 304, 316, and 321 stock, with TEMA standards governing the dimensional and quality requirements.

Stainless Steel Pipes for Food and Pharmaceutical Industries

The internal surface finishes should be Ra 0.8µm or better for hygienic service with electropolished bores for critical pharmaceutical lines. Full traceability as per FDA 21 CFR and GMP guidelines is guaranteed with every batch being supplied with certificate of conformity and material test reports. Clean-in-place (CIP) systems circulate hot caustic and acid solutions to sanitise lines without dismantling, so weld quality and bore smoothness have a direct impact on system cleanability. Grade 316L handles CIP chemical cycles without degradation.

Lifecycle Cost Benefits of Stainless Steel Pipes

Carbon steel carries a lower purchase price per metre, but the total cost picture shifts substantially over a 25-year operating period. Stainless steel pipes do not require external coatings or cathodic protection, both of which add recurring maintenance spend to carbon steel installations. Unplanned shutdowns for pipe replacement in chemical or food service environments cost far more than the price difference at the time of purchase.

Factors to Consider When Buying Stainless Steel Pipes

Start with the service environment. Chloride content, pH, temperature, and pressure all narrow your grade options before anything else. A coastal chemical plant running acid service points directly to 316L. An inland water utility at moderate temperatures might work fine with 304.

Wall thickness and schedule selection must match both the pressure rating and the pipe code governing your installation, whether that is ASME B31.3 for process piping or ASME B31.8 for gas transmission. Do not select a schedule based on price alone; under-specified wall thickness carries real consequences in high-pressure service.

Surface finish affects both corrosion performance and cleanability. Pickled and passivated finish suits most industrial process lines. Polished or electropolished finishes add cost but are non-negotiable for food and pharmaceutical contact surfaces.

Verify that the supplier is ISO 9001 certified and able to provide full mill traceable material test reports (MTRs). PMI testing and hydrostatic test certificates should be provided with every shipment for critical applications. For export orders packaging must conform to the timber treatment requirements of the destination port and MSDS documentation must accompany the shipment.

Piyush Steel is an ISO 9001:2008 certified company, and maintains a ready stock of all grades and schedules for immediate dispatch. Email our team with your size, grade, quantity, and delivery requirements to see availability and pricing.

Stainless Steel Pipe Price Per Kg

Stainless steel pipe prices generally depend on the grade selected, pipe size, wall thickness, and whether the pipe is seamless or welded. Grade 316 costs more than 304 because of the molybdenum content. The cost also depends on the size of the order, or if the pipes are custom sized. We have our own supply chain, so we can offer competitive rates without compromising on quality.

Why Choose Us as Your Stainless Steel Pipe Supplier?

We have over forty years of experience in this industry. That helps when clients bring complex specifications or need materials for critical projects. We are ISO 9001 certified for quality control. We keep stock levels to ensure fast delivery. We regularly work on projects in the chemical processing, oil and gas and power generation industries, including those that are tight tolerance and compliance driven.

All pipes and tubes meet ASTM, ASME, and DIN standards. We produce pipes with ASTM A312 and ASME SA312 for high temperature and corrosive environment and comply with ASME B36.19 for dimension. We supply to DIN 17456 and DIN 17457 for European requirements.

Available grades are 304, 304L, 316, 316L, 321, 347, SS 309 seamless pipes and SS 310 seamless tubes. Custom sizes and lengths are available as well as small and large diameters in seamless, welded, ERW or fabricated types.

Stainless Steel Pipe and Tube Manufacturers in India with Competitive Pricing

 

Stainless Steel Pipes American Standards

EN Standard For Stainless Steel Pipe

Stainless Steel Pipe Grades Chart

Austenitic Stainless Steel Grades

Ferritic Stainless Steel Grades

Martensitic Stainless Steel Grades

Duplex Stainless Steel Grades

Precipitation hardening (PH) Grades

SS Pipe Sizes and Dimensions

ANSI B36.10 / ANSI B36.19

Seamless Stainless Steel Pipe Weight Chart

 

Types Of Stainless Steel Pipes Tubes

Stainless Steel Pipes Weight Chart

 

 

Distributors, Dealers & Suppliers of World's Top 10 Manufacturers of Stainless Steel Pipes & Tubes

 

We export to - United States, Middle East, UAE, Saudi Arabia, Qatar, Yemen, South America, Kuwait, Oman, Bahrain, Iran, Iraq, Turkey, India, Nigeria, Brazil, Mexico, Venezuela, Chile, South Africa, Lebanon, Egypt & many other countries