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Alloy Steel Pipe

ASTM A335 Alloy Steel Seamless Pipes Manufacturer in India
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Alloy Steel Pipe Manufacturer, Supplier & Exporter – ASTM A335 P Grades

Alloy Steel Pipe Manufacturer | ASTM A335 P5, P9, P11, P22, P91 Supplier

STAINLESS INDIA is one of India's leading manufacturers, suppliers and exporters of Alloy Steel Pipes manufactured to international standards including ASTM A335, ASTM A213, ASME SA335 and ASME SA213. We supply seamless alloy steel pipes in grades P1, P5, P9, P11, P22, P91 for high-temperature, high-pressure and corrosive service applications across power plants, refineries, petrochemical facilities, oil & gas projects, offshore platforms, fertilizer plants and process industries. Every pipe is manufactured under strict quality control, supplied with EN 10204 3.1 Mill Test Certificates, and inspected for dimensional accuracy, mechanical properties and chemical composition before dispatch.

Our alloy steel pipes are engineered for superior creep resistance, oxidation resistance, corrosion resistance and long service life under elevated temperatures. Available in seamless, custom cut-length and project-specific configurations, our products comply with international specifications and are trusted by EPC contractors, OEM manufacturers and industrial buyers in more than 70 countries. We provide fast delivery, competitive pricing, complete material traceability and third-party inspection from agencies such as SGS, BV, DNV, TÜV and Lloyd's Register.

Our manufacturing capability covers alloy steel pipes for boilers, superheaters, heat exchangers, pressure piping systems, steam lines, hydraulic systems and critical process equipment. We stock ASTM A335 P11 Pipe, ASTM A335 P22 Pipe, ASTM A335 P91 Pipe, ASTM A335 P5 Pipe and chrome molybdenum alloy steel pipes in multiple schedules, wall thicknesses and sizes to support urgent shutdown projects and large industrial requirements.

Why Alloy Steel Pipes are Used in High Temperature Industries

Alloy steel pipes are specifically developed for elevated temperature and pressure applications where ordinary carbon steel cannot provide adequate performance. Chromium and molybdenum improve heat resistance, creep strength, oxidation resistance and mechanical stability, making alloy steel pipes the preferred material for power generation, petrochemical processing, refinery operations, boiler manufacturing and steam transmission systems.

The most commonly used grades include ASTM A335 P11, P22 and P91, each selected according to operating temperature, pressure requirements and corrosion conditions. Choosing the correct grade improves plant reliability, reduces maintenance costs and extends equipment life.

Product Range

Types of Alloy Steel Pipes & Tubes

Seamless Pipes
Seamless Tubes
Heat Exchanger Tubes
Boiler Tubes
U-Bend Tubes
Hollow Bars
Custom Mechanical Tubing
Dimensions
  • OD: 6mm to 600mm
  • Thickness: 1mm to 60mm
  • Length: Single, Double, Cut-length
Mechanical Properties
  • Tensile: 415–620 MPa
  • Yield: 205–450 MPa
  • Hardness: 150–250 HB
Testing Capabilities

Hydrostatic, Ultrasonic, PMI, Hardness, Flattening & Flaring Tests.

Certifications
  • EN 10204 3.1 / 3.2
  • IBR Approved
  • NACE MR0175
  • ISO Certified
Material Specifications

Grades We Offer

Specification Family Available Grades
ASTM A335 High-Temperature Service
P1 Alloy Steel P5 Seamless P9 Chrome Moly P11 Alloy Steel P22 High-Temp P91 Creep-Strength
Other Standards Global Specifications
ASTM A213 (Boiler) ASTM A209 ASTM A369 DIN / EN 10216 BS / JIS Standards

Technical Specifications of Alloy Steel Pipes

Our alloy steel pipes are manufactured according to international ASTM, ASME and EN standards for high-pressure and high-temperature service. Pipes are available in seamless construction with multiple schedules, wall thicknesses and customized lengths.

Specification Details
Standard ASTM A335 / ASME SA335
Grades P1, P5, P9, P11, P22, P91
Outside Diameter 1/8" NB to 48" NB
Wall Thickness Schedule 10 to XXS
Pipe Type Seamless
Length Single Random, Double Random, Cut Length
Ends Plain End, Bevel End, Threaded
Certification EN 10204 3.1 / 3.2 MTC
Inspection SGS, BV, DNV, TUV, LR

Manufacturing Process of Alloy Steel Pipes

Every alloy steel pipe supplied by Stainless India undergoes stringent manufacturing and quality control procedures beginning with raw material verification. Pipes are produced through hot extrusion, piercing, rolling, heat treatment, straightening, sizing and finishing processes before final inspection.

Each pipe is tested for dimensional accuracy, hydrostatic pressure, ultrasonic testing, hardness, flattening, flaring, PMI, chemical composition and mechanical properties. Complete traceability is maintained through heat numbers and mill test certificates.

Advantages of ASTM A335 Alloy Steel Pipes

  • Excellent creep resistance
  • Superior oxidation resistance
  • High temperature strength
  • Excellent weldability
  • Long service life
  • Low maintenance cost
  • Excellent pressure handling capability
  • Suitable for boiler applications
  • Ideal for refinery piping systems
  • Excellent mechanical properties

Industries We Serve Worldwide

Our alloy steel pipes are supplied for:

  • Oil & Gas Industry
  • Power Plants
  • Thermal Power Stations
  • Nuclear Plants
  • Refineries
  • Petrochemical Plants
  • Fertilizer Plants
  • Chemical Processing Plants
  • Offshore Platforms
  • Shipbuilding Industry
  • Sugar Industry
  • Cement Plants
  • Steel Plants
  • Water Treatment Plants
  • Engineering Projects

How to Select the Right Alloy Steel Pipe

Selecting the correct alloy steel pipe depends on operating temperature, pressure, corrosion environment, design code, and the mechanical properties required for the application. Higher chromium and molybdenum content generally improves oxidation resistance and creep strength for elevated-temperature service.

Application Recommended Grade
Steam Lines ASTM A335 P11
Power Plants ASTM A335 P22
Super Critical Boilers ASTM A335 P91
Refineries P5 / P9
Petrochemical Plants P11 / P22

Quality Assurance & Inspection

Every alloy steel pipe supplied by Stainless India undergoes strict quality control procedures before dispatch. We maintain complete material traceability from raw material procurement to final shipment.

  • Raw Material Verification
  • PMI Testing
  • Hydrostatic Testing
  • Ultrasonic Testing
  • Radiography (When Required)
  • Hardness Testing
  • Tensile Testing
  • Chemical Analysis
  • Visual Inspection
  • Dimensional Inspection
  • Third Party Inspection Available
  • EN 10204 3.1 & 3.2 Certification

International Manufacturing Standards

Our alloy steel pipes comply with internationally recognized standards including:

  • ASTM A335
  • ASME SA335
  • ASTM A213
  • ASME SA213
  • ASTM A369
  • ASTM A209
  • EN 10216
  • DIN Standards
  • NACE MR0175
  • ISO 9001
  • PED Certified Manufacturing

Why Choose Stainless India?

Thousands of industrial buyers worldwide choose Stainless India because we provide reliable quality, competitive pricing, fast delivery and complete technical support throughout the procurement process.

  • Manufacturer & Exporter
  • Ready Stock Available
  • Custom Cutting
  • Worldwide Shipping
  • Third Party Inspection
  • MTC 3.1 / 3.2
  • ISO Certified Company
  • Project Supply Experience
  • Technical Sales Support
  • Serving 70+ Countries

Related Alloy Steel Products

Explore our complete range of alloy steel products manufactured and supplied for high-temperature and high-pressure industrial applications.

Industries Using ASTM A335 Alloy Steel Pipes

ASTM A335 alloy steel pipes are extensively used in industries requiring high-pressure and elevated-temperature performance.

  • Power Generation Plants
  • Boiler Manufacturing
  • Heat Exchanger Systems
  • Petrochemical Industry
  • Oil & Gas Processing
  • Refineries
  • Chemical Plants
  • Marine Engineering
  • Steel Plants
  • Offshore Projects
  • Pressure Vessel Manufacturing
  • Process Piping Systems

Global Export Markets

Stainless India exports alloy steel pipes to EPC contractors, distributors, OEM manufacturers and industrial projects across more than 70 countries.

Major export destinations include the USA, Canada, Mexico, Germany, Italy, France, Spain, United Kingdom, UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Singapore, Malaysia, Indonesia, Australia and South Africa.

Buyer Guide for Alloy Steel Pipes

Before purchasing alloy steel pipes, buyers should verify:

  • Applicable ASTM Specification
  • Correct Grade (P11, P22, P91 etc.)
  • Pipe Schedule
  • Wall Thickness
  • Operating Temperature
  • Pressure Rating
  • Inspection Requirements
  • MTC Availability
  • Third Party Inspection
  • Country of Origin
Technical Superiority

Key Features

High Strength & Durability

Possesses high tensile strength and excellent resistance to corrosion.

High-Temp Performance

Performs exceptionally well in challenging environments with high temperatures.

Rigorous Testing

Undergoes comprehensive radiography and non-destructive testing (NDT).

Formability

Can be easily welded, bent, and formed to meet specific requirements.

Full Traceability

Includes full MTC, third-party inspection reports, and compliance docs.

Industries & Applications

Oil & Gas Pipelines
Refineries
Petrochemical Plants
Boilers & Heat Exchangers
Power Plants
Fertilizer Industry
Nuclear Plants
Mechanical & Hydraulic
Shipbuilding & Marine

Documents Provided

  • Mill Test Certificate (EN 10204 3.1 / 3.2)
  • IBR Certificate (where relevant)
  • NACE MR0175 Conformance
  • Reports from Independent Inspection Agencies (TUV, DNV, BV, SGS)
  • Records of Heat Treatment and Mechanical Testing
  • Packing Slip, Sales Invoice, Certificate of Origin
Our Advantage

Why We Are the Best Alloy Steel Pipe Manufacturer?

Direct Manufacturer

Direct manufacturer with extensive inventory and complete in-house production facilities.

Advanced QA/QC

Featuring advanced quality assurance and strict quality control protocols.

Fully Certified

Certified by PED, ISO, and CE standards for global compliance.

Complete Traceability

Complete traceability provided with detailed test reports and clear markings.

Global Export

Global export capabilities supplying high-quality pipes to over 70 countries.

Tailored Solutions

Tailored lengths and specific grades available to meet unique project needs.

EPC Approved

Trusted EPC-approved supplier for essential and critical piping packages.

Rapid Delivery

Rapid delivery schedules paired with highly competitive global pricing.

Fully Tested

Fully tested products accompanied by Material Test Certificates (MTC).

Frequently Asked Questions – Alloy Steel Pipes

They are utilized in high-pressure and high-temperature settings such as boilers, refineries, and power generation facilities.

We offer P1, P5, P9, P11, P22, P91, along with other ASTM A335 classifications.

A335 pertains to seamless ferritic alloy steel pipes designed for high-temperature applications, whereas A213 is intended for boiler, superheater, and heat-exchanger tubes.

Yes, we supply alloy steel pipes and tubes that are IBR-certified for power and boiler projects.

Yes, we provide EN 10204 3.1 & 3.2 certificates.

Yes, we offer custom cut-to-length pipes with beveled, plain, or threaded ends.

Certainly. We collaborate with TUV, SGS, BV, DNV, and various other agencies.

ASTM A335 is the international specification for seamless ferritic alloy steel pipes used in high-temperature and high-pressure applications such as power plants, refineries, petrochemical facilities and boiler systems.

ASTM A335 P11, P22 and P91 are among the most widely used grades for elevated-temperature service. The correct grade depends on operating temperature, pressure and design requirements.

Yes. Every shipment can be supplied with EN 10204 3.1 Mill Test Certificates, and EN 10204 3.2 certification is available when project specifications require it.

We supply alloy steel pipes from 1/8 inch to 48 inches in multiple wall thicknesses, schedules and custom cut lengths according to customer specifications.

Alloy steel pipes are widely used in power plants, refineries, petrochemical facilities, oil & gas processing, boilers, heat exchangers, offshore platforms, fertilizer plants and chemical processing industries.

Yes. Stainless India exports alloy steel pipes to more than 70 countries and supports international projects with complete export documentation, inspection reports and worldwide logistics.

Type of Alloy Steel Pipes & Tubes Available

Alloy Steel Pipe Alloy Steel Seamless Pipe ASTM A335 Pipe
Alloy Steel Pipe Manufacturer Chrome Moly Pipe A335 P22 Pipe Supplier
High Temperature Pipes Boiler Quality Alloy Steel Pipe Alloy Steel Seamless Pipe Manufacturer in India
Best price for A335 P11 / P22 pipes Chrome moly pipe stockist in UAE / USA A213 T91 heat exchanger tube exporter
A335 P5 seamless pipe manufacturer IBR approved alloy pipes alloy steel pipe manufacturer India

Global Export Network

We export to more than 70+ countries:

USA • UK • Germany • Italy • UAE • Saudi Arabia • Qatar • Oman • Kuwait • Singapore • Malaysia • Indonesia • Australia • South Africa • Brazil • Mexico • India

All Shipments Include:
  • Packing List
  • Invoice
  • MTC 3.1 / 3.2
  • Third-Party Inspection (TUV/LR/BV) if required
  • Heat Number Traceability

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