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.
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.
Hydrostatic, Ultrasonic, PMI, Hardness, Flattening & Flaring Tests.
| 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
|
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 |
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.
Our alloy steel pipes are supplied for:
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 |
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.
Our alloy steel pipes comply with internationally recognized standards including:
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.
Explore our complete range of alloy steel products manufactured and supplied for high-temperature and high-pressure industrial applications.
ASTM A335 alloy steel pipes are extensively used in industries requiring high-pressure and elevated-temperature performance.
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.
Before purchasing alloy steel pipes, buyers should verify:
Possesses high tensile strength and excellent resistance to corrosion.
Performs exceptionally well in challenging environments with high temperatures.
Undergoes comprehensive radiography and non-destructive testing (NDT).
Can be easily welded, bent, and formed to meet specific requirements.
Includes full MTC, third-party inspection reports, and compliance docs.
Direct manufacturer with extensive inventory and complete in-house production facilities.
Featuring advanced quality assurance and strict quality control protocols.
Certified by PED, ISO, and CE standards for global compliance.
Complete traceability provided with detailed test reports and clear markings.
Global export capabilities supplying high-quality pipes to over 70 countries.
Tailored lengths and specific grades available to meet unique project needs.
Trusted EPC-approved supplier for essential and critical piping packages.
Rapid delivery schedules paired with highly competitive global pricing.
Fully tested products accompanied by Material Test Certificates (MTC).
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