Alloy Steel Pipe Supplier
- Refineries
- Petrochemical plants
- Power generation
- High-temperature process piping
P9 is a chromium-molybdenum alloy steel grade offering good high-temperature strength and oxidation resistance.
Commonly used in:
- Power plants
- Refineries
- Steam piping
- High-temperature services
- Boiler piping
- Steam lines
- Superheater systems
- Refinery piping
P22 is a chromium-molybdenum alloy steel grade commonly selected for high-temperature and high-pressure service.
It is widely used in:
- Power plants
- Refineries
- Petrochemical facilities
- Steam systems
P91 is a high-strength modified chromium-molybdenum alloy steel grade used for demanding high-temperature applications.
Common applications include:
- Power generation
- Supercritical boilers
- High-pressure steam piping
- Power plant headers
OIS Middle East supplies seamless alloy steel pipes for applications requiring high mechanical strength and reliable performance under pressure and temperature.
Seamless pipes are commonly specified for:
- High-pressure piping
- Boiler systems
- Steam pipelines
- Refineries
- Power generation
- Process piping
Our alloy steel pipes are available according to applicable international standards, including:
- ASTM A335 / ASME SA335
- ASTM A213 / ASME SA213
- ASTM A234
- ASTM A182
- ASTM A999
- ASME B36.10M
- ASME B36.19M, where applicable
The applicable standard depends on the pipe type, material grade, dimensions, service conditions, and project requirements
We supply alloy steel pipes in various nominal sizes
Typical sizes include:
- ½”
- ¾”
- 1″
- 1½”
- 2″
- 3″
- 4″
- 6″
- 8″
- 10″
- 12″
- 14″
- 16″
- 18″
- 20″
- 24″
- Larger sizes on request
Depending on grade and size, available wall thicknesses may include:
- SCH 10
- SCH 20
- SCH 30
- SCH 40
- SCH 60
- SCH 80
- SCH 100
- SCH 120
- SCH 140
- SCH 160
- XXS
- Custom wall thickness
Alloy steel pipes can be supplied with:
- Plain Ends
- Beveled Ends
- Threaded Ends
- Customized End Preparation
Beveled ends are commonly used for butt-welding applications
Available finishes may include:
- Black / Mill Finish
- Pickled & Passivated, where applicable
- Shot Blasted
- Customized Surface Treatment
Surface requirements depend on the material grade and project specification.
The chemical composition varies according to the specific alloy steel grade. Typical alloying elements include:
- Carbon
- Manganese
- Silicon
- Chromium
- Molybdenum
- Phosphorus
- Sulfur
For example, chromium and molybdenum additions improve high-temperature strength, oxidation resistance, and overall performance.
Material chemistry should always be verified against the applicable ASTM/ASME specification and the manufacturer’s MTC
Mechanical requirements vary by grade.
Typical properties evaluated include:
- Tensile Strength
- Yield Strength
- Elongation
- Hardness
- Impact Properties, where specified
The exact requirements should be confirmed against the applicable material standard and project specification
Alloy steel pipes are used extensively in high-temperature and high-pressure oil & gas processing facilities.
Applications include:
- Process piping
- Refinery piping
- Steam systems
- Hydrocarbon processing
- High-temperature utilities
Alloy steel is particularly important in power plants where piping is exposed to elevated temperature and pressure.
Applications include:
- Boiler piping
- Main steam lines
- Superheater piping
- Reheater systems
- High-pressure steam lines
- Power plant headers
Alloy steel pipes are commonly used in:
- Hydroprocessing units
- Steam systems
- Process lines
- Furnace piping
- High-temperature services
Depending on the applicable standard and project requirements, testing may include:
- Visual Inspection
- Dimensional Inspection
- Chemical Analysis
- Tensile Testing
- Hardness Testing
- Hydrostatic Testing
- Ultrasonic Testing
- Eddy Current Testing, where applicable
- Impact Testing, where specified
- PMI
- Heat Treatment Verification
- Third-Party Inspection
Available documentation may include:
- EN 10204 3.1 Mill Test Certificate
- EN 10204 3.2 Certificate
- Material Test Reports
- Heat Number Traceability
- Chemical Analysis Reports
- Mechanical Test Reports
- Hydrostatic Test Reports
- NDT Reports
- Heat Treatment Records
- Dimensional Inspection Reports
- Third-Party Inspection Reports
- ASTM A335 alloy steel grades
- P5, P9, P11, P22 and P91 availability
- Seamless pipe options
- Wide range of sizes and schedules
- Competitive pricing
- Complete quality documentation
- Material traceability
- Technical support
- Project-specific sourcing
- UAE-wide delivery
- GCC and international export support
Our alloy steel pipes are supplied to:
- Oil & Gas
- Refineries
- Petrochemical
- Power Generation
- Chemical Processing
- Boiler Systems
- Heat Exchanger Projects
- Engineering & Fabrication
- EPC Contractors
- Industrial Manufacturing
OIS Middle East supplies alloy steel pipes throughout:
- Dubai
- Abu Dhabi
- Sharjah
- Ajman
- Ras Al Khaimah
- Fujairah
- Umm Al Quwain
We also support requirements throughout the GCC, Africa, and international export markets.
Alloy steel pipes are primarily used in high-temperature and high-pressure applications such as power plants, refineries, petrochemical plants, boilers, and process piping systems
ASTM A335 is one of the principal standards for seamless ferritic alloy steel pipe intended for high-temperature service
Common grades include ASTM A335 P5, P9, P11, P22, and P91, subject to availability and project requirements
Both are chromium-molybdenum alloy steel grades, but they have different alloy compositions and mechanical/thermal performance requirements. The appropriate grade should be selected according to the design conditions and applicable specification.
Yes. We supply seamless alloy steel pipes in various grades, sizes, schedules, and lengths
Yes. Specific alloy steel grades are widely used for high-temperature steam and boiler applications, subject to design and applicable material specifications
Yes. EN 10204 3.1 and 3.2 documentation can be provided according to project requirements.
Yes. We can source pipes according to the required grade, size, schedule, standard, quantity, testing requirements, heat treatment requirements, and certification requirements.
