Stainless Steel 347 Grade Pipe | SS 347 Pipes Manufacturer & Supplier | Maruti International

Stainless Steel 347 Grade Pipe

Maruti International is a trusted manufacturer, exporter, and supplier of premium-quality Stainless Steel 347 Grade Pipes, engineered to deliver outstanding performance in high-temperature, high-pressure, and corrosive environments. Manufactured using high-grade stainless steel and advanced production technologies, our SS 347 pipes provide exceptional strength, superior corrosion resistance, excellent weldability, and long service life.

Our Stainless Steel 347 Pipes are produced in compliance with international standards such as ASTM, ASME, ANSI, DIN, EN, ISO, and JIS, ensuring superior dimensional accuracy, reliable mechanical properties, and excellent surface finish. At Maruti International, we are committed to delivering high-quality piping solutions that meet global industry standards while offering competitive pricing, customized manufacturing, and timely worldwide delivery.

With years of expertise in stainless steel piping solutions, Maruti International serves customers across industries including oil & gas, petrochemical, chemical processing, power generation, marine, aerospace, pharmaceutical, food processing, pulp & paper, water treatment, construction, and heavy engineering.

What is Stainless Steel 347 Grade Pipe?

Stainless Steel 347 Grade Pipe is an austenitic chromium-nickel stainless steel stabilized with niobium (columbium). The addition of niobium prevents chromium carbide precipitation during welding and prolonged exposure to elevated temperatures, making SS 347 an excellent choice for applications requiring high-temperature strength and resistance to intergranular corrosion.

Compared to Stainless Steel 304, SS 347 offers enhanced resistance to oxidation, thermal fatigue, and creep, making it suitable for continuous service in temperatures up to 870°C (1600°F) and intermittent service up to 925°C (1700°F).

Its excellent mechanical properties, weldability, and resistance to oxidation make Stainless Steel 347 pipes widely used in heat exchangers, boilers, pressure vessels, refinery equipment, and high-temperature process piping.

Features of Stainless Steel 347 Grade Pipe

Maruti International manufactures Stainless Steel 347 Pipes with precision engineering and strict quality control.

Key Features

• Excellent corrosion resistance

• Superior resistance to intergranular corrosion

• Excellent high-temperature strength

• Niobium stabilized composition

• Outstanding oxidation resistance

• Excellent weldability

• High tensile strength

• Superior creep resistance

• Excellent fatigue resistance

• Good ductility

• Smooth surface finish

• High dimensional accuracy

• Long service life

• Low maintenance requirements

• Excellent formability

• Suitable for elevated temperature applications

• Excellent pressure handling capability

• Durable construction

• Manufactured according to international standards

• Custom dimensions available

Advantages of Stainless Steel 347 Pipes

High Temperature Performance

SS 347 maintains excellent mechanical strength and oxidation resistance at elevated temperatures, making it ideal for thermal processing equipment.

Resistance to Intergranular Corrosion

Niobium stabilization prevents carbide precipitation, protecting welded joints from intergranular corrosion.

Excellent Weldability

Can be welded using conventional stainless steel welding techniques without requiring post-weld heat treatment in many applications.

Superior Mechanical Strength

Offers excellent tensile strength, yield strength, and impact resistance under demanding operating conditions.

Long Service Life

Outstanding corrosion resistance and durability reduce maintenance costs and extend equipment life.

Excellent Oxidation Resistance

Performs exceptionally well in oxidizing atmospheres at elevated temperatures.

Cost-Effective Performance

Provides excellent long-term value by minimizing downtime and replacement costs.

Specifications

Maruti International manufactures Stainless Steel 347 Pipes in a comprehensive range of sizes and specifications.

Material Grades

• Stainless Steel 347

• Stainless Steel 347H

Product Types

• Seamless Pipes

• Welded Pipes

• ERW Pipes

• EFW Pipes

• Fabricated Pipes

Manufacturing Standards

• ASTM A312

• ASTM A358

• ASTM A790 (where applicable)

• ASTM A213

• ASTM A269

• ASME SA312

• ASME SA213

• ASME SA269

• ANSI

• DIN

• EN

• ISO

• JIS

Size Range

• ¼" NB to 48" NB

• Outside Diameter: 6 mm to 610 mm

• Custom sizes available

Wall Thickness

• SCH 5

• SCH 10

• SCH 20

• SCH 40

• SCH 80

• SCH 160

• XXS

• Custom wall thickness available

Length

• Single Random

• Double Random

• Fixed Length

• Custom Cut Lengths

Surface Finish

• Annealed & Pickled

• Bright Annealed

• Polished

• Mirror Finish

• Satin Finish

• Mill Finish

Chemical Composition of Stainless Steel 347

Typical chemical composition includes:

• Chromium (Cr): 17.0–19.0%

• Nickel (Ni): 9.0–13.0%

• Carbon (C): Max 0.08%

• Manganese (Mn): Max 2.0%

• Silicon (Si): Max 1.0%

• Phosphorus (P): Max 0.045%

• Sulfur (S): Max 0.03%

• Niobium + Tantalum (Nb + Ta): 10 × Carbon minimum to 1.0% maximum

• Iron (Fe): Balance

Mechanical Properties

Stainless Steel 347 Pipes offer outstanding mechanical performance.

Properties include:

• High tensile strength

• Excellent yield strength

• Superior elongation

• Excellent toughness

• High impact resistance

• Good hardness

• Excellent creep resistance

• Outstanding fatigue strength

Types of Stainless Steel 347 Pipes

Maruti International manufactures a complete range of SS 347 piping products.

SS 347 Seamless Pipes

Ideal for high-pressure and critical industrial applications.

SS 347 Welded Pipes

Suitable for low- to medium-pressure process piping systems.

SS 347 ERW Pipes

Manufactured using electric resistance welding for structural and industrial use.

SS 347 EFW Pipes

Used for larger diameter piping applications.

SS 347 Round Pipes

Commonly used in industrial and structural fabrication.

SS 347 Heat Exchanger Pipes

Designed for heat transfer equipment and thermal processing systems.

SS 347 Boiler Pipes

Suitable for steam generation and high-temperature boiler systems.

Applications of Stainless Steel 347 Pipes

Maruti International Stainless Steel 347 Pipes are widely used in numerous industries.

Oil & Gas Industry

Used in refineries, pipelines, offshore platforms, and petrochemical processing.

Petrochemical Industry

Ideal for transporting hydrocarbons and high-temperature process fluids.

Chemical Processing Plants

Suitable for corrosive chemical handling systems.

Power Generation

Widely used in boilers, superheaters, reheaters, condensers, and heat exchangers.

Aerospace Industry

Applied in aircraft exhaust systems and high-temperature structural components.

Marine Industry

Provides excellent corrosion resistance in marine processing environments.

Pharmaceutical Industry

Suitable for hygienic process piping systems.

Food Processing Industry

Used in sanitary production equipment requiring corrosion-resistant materials.

Water Treatment Plants

Applied in industrial water purification and wastewater treatment systems.

Pulp & Paper Industry

Excellent resistance to corrosive chemicals used in paper manufacturing.

Manufacturing Process

Maruti International employs advanced manufacturing techniques to ensure superior product quality.

Our manufacturing process includes:

• Raw material inspection

• Pipe forming

• Seamless or welded production

• Heat treatment

• Straightening

• Pickling

• Surface finishing

• Dimensional inspection

• Non-destructive testing

• Hydrostatic testing

• Final quality inspection

• Secure export packaging

Quality Assurance

Quality is the foundation of every Stainless Steel 347 Pipe manufactured by Maruti International.

Inspection procedures include:

• Chemical composition analysis

• Mechanical testing

• Tensile testing

• Flattening test

• Flaring test

• Hydrostatic testing

• Eddy Current Testing

• Ultrasonic Testing (UT)

• Positive Material Identification (PMI)

• Hardness testing

• Visual inspection

• Dimensional inspection

Material Test Certificates (MTC) are supplied upon customer request.

Why Choose Maruti International?

Maruti International is recognized globally for manufacturing premium stainless steel piping products.

Premium Quality Raw Materials

We use certified stainless steel sourced from trusted manufacturers.

Advanced Manufacturing Technology

Modern production facilities ensure consistent quality and precision.

International Standards

Products comply with ASTM, ASME, ANSI, DIN, EN, ISO, and JIS specifications.

Customized Manufacturing

Custom dimensions, wall thicknesses, lengths, and finishes are available.

Competitive Pricing

Efficient manufacturing enables us to offer premium products at cost-effective prices.

Worldwide Export

We export Stainless Steel 347 Pipes across Asia, Europe, North America, South America, Africa, and the Middle East.

On-Time Delivery

Efficient logistics ensure prompt delivery for projects of every scale.

Technical Support

Our experienced engineering team assists customers in selecting the right piping solutions.

Packaging and Shipping

Maruti International ensures safe packaging for worldwide transportation.

Packaging options include:

• Wooden Boxes

• Fumigated Wooden Crates

• Bundle Packing

• Plastic End Caps

• Waterproof Wrapping

• Export Pallets

• Customized Packaging

Worldwide shipping is available through sea freight, air freight, and road transport.

Industries We Serve

Our Stainless Steel 347 Pipes are trusted across industries including:

• Oil & Gas

• Petrochemical

• Chemical Processing

• Power Generation

• Marine

• Offshore

• Aerospace

• Pharmaceutical

• Food Processing

• Water Treatment

• Desalination Plants

• Construction

• Infrastructure

• Pulp & Paper

• Mining

• Heavy Engineering

• LNG Plants

• Refineries

• Industrial Manufacturing

• Process Industries

Frequently Asked Questions (FAQs)

What is Stainless Steel 347 Pipe?

Stainless Steel 347 Pipe is a niobium-stabilized austenitic stainless steel pipe designed for high-temperature applications requiring superior resistance to intergranular corrosion.

What is the difference between SS 347 and SS 304?

SS 347 contains niobium for stabilization, providing better resistance to carbide precipitation, intergranular corrosion, and high-temperature oxidation compared to SS 304.

What is SS 347H?

SS 347H is the high-carbon version of SS 347, offering improved creep strength and elevated temperature performance.

Which standards do your SS 347 Pipes comply with?

Our Stainless Steel 347 Pipes comply with ASTM A312, ASTM A358, ASTM A213, ASTM A269, ASME SA312, DIN, EN, ISO, ANSI, and JIS standards.

Can Maruti International manufacture customized SS 347 Pipes?

Yes. We manufacture customized Stainless Steel 347 Pipes according to customer drawings, sizes, wall thicknesses, lengths, and project specifications.

Do you export worldwide?

Yes. Maruti International exports premium-quality Stainless Steel 347 Grade Pipes worldwide with secure packaging and timely delivery.

Maruti International – Your Trusted Stainless Steel 347 Grade Pipe Manufacturer & Exporter

At Maruti International, we specialize in manufacturing and supplying high-performance Stainless Steel 347 Grade Pipes that combine superior corrosion resistance, excellent high-temperature strength, and exceptional durability. Manufactured using certified raw materials and advanced production techniques, our SS 347 pipes meet the highest international quality standards and are designed to perform reliably in demanding industrial environments.

Whether your project requires seamless, welded, ERW, or customized Stainless Steel 347 Pipes, Maruti International provides dependable solutions backed by engineering expertise, rigorous quality assurance, competitive pricing, and efficient global logistics. Our commitment to innovation, precision, and customer satisfaction has established us as a trusted supplier of stainless steel piping solutions worldwide. Choose Maruti International for premium Stainless Steel 347 Grade Pipes that deliver long-lasting performance, safety, and outstanding value for critical industrial applications.