We Super Steel Manufacturing Co.,Ltd(SMC) are amongst the top manufacturers and suppliers for the seamless steel pipe, welded steel pipe, OCTG products and fittings from China. We have been manufacturing and supplying these products to the industry since 1993, and received repeat orders and appreciation from our valued customers.
High quality piping products from approved manufacturers.
In order to continuously improve our offerings to our clients, we have consistently improved and upgraded our manufacturing facility and can hence offer material with stringent requirements.
Over the years, Super Steel Manufacturing Co.,Ltd(SMC) has developed an enviable reputation for project management for the Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical and other heavy industries.
The many years of experience that we have means that there is always someone who has the ability to carry a project forward.
Always up to date. In this column you can find the steel pipe related articles, including industry trends, product standards and materials, and some technical guidelines.
ASTM A335 P9 seamless steel pipes are ferritic alloy steel pipes intended for high-temperature service. These pipes are widely used in industries such as petrochemical, power generation, boiler systems, and refinery applications, due to their excellent mechanical strength, heat resistance, and corrosion resistance.
All ASTM A335 P9 pipes must comply with the TSG D7002 - Type Test Rules for Pressure Pipeline Components.
Super Steel Manufacturing Co.,Ltd is professional seamless steel pipe manufacturer, for more details, please contact:sales@super-steels.com
Chemical Composition of ASTM A335 P9 Pipe
The chemical composition of ASTM A335 Grade P9 is critical to its performance in high-temperature environments. The material contains:
|
Element |
Composition (%) |
|
Carbon (C) |
≤ 0.15 |
|
Manganese (Mn) |
0.30 – 0.60 |
|
Phosphorus (P) |
≤ 0.025 |
|
Sulfur (S) |
≤ 0.025 |
|
Silicon (Si) |
0.50 – 1.00 |
|
Chromium (Cr) |
8.00 – 10.00 |
|
Molybdenum (Mo) |
0.90 – 1.10 |
This composition ensures excellent strength, oxidation resistance, and creep resistance under elevated temperatures.
Product Specifications of ASTM A335 P9 Pipe
ASTM A335 P9 seamless steel pipes are available in a wide range of sizes to suit different application needs.
Outer Diameter: 21.36 mm – 762 mm
Wall Thickness: 2.0 mm – 130 mm
These specifications support diverse pressure and temperature conditions in power and chemical piping systems.
Manufacturing and Delivery Conditions of ASTM A335 P9 Pipe
ASTM A335 P9 seamless pipes are manufactured using one of the following processes:
Hot Rolling
Cold Drawing
Hot Expansion
Delivery Status
Pipes are delivered in a heat-treated condition to meet the mechanical and performance requirements for high-temperature use.
Surface Quality Requirements of ASTM A335 P9 Pipe
To ensure accurate inspection and long-term reliability, ASTM A335 P9 seamless pipes must have:
Clean surfaces, free from scale, oil, paint, or any foreign matter.
No deep scratches or gouges that may interfere with non-destructive testing (NDT).
Any surface preparation must not damage the pipe's parent material.
Certification Requirements of ASTM A335 P9 Pipe
According to ASTM A530/A530M, the mill test certificate (MTC) for ASTM A335 P9 seamless steel pipes should include:
Whether the pipe has undergone a hydrostatic test.
If non-destructive electrical testing (NDE) was performed, it must detail the:
Testing method
Calibration standards
Testing procedures used
The certificate should also clearly state the standard number, steel grade, test pressure, and testing method (hydraulic or NDE).
Product Marking of ASTM A335 P9 Pipes
Each pipe should be marked in accordance with ASTM A530/A530M, with additional details including:
Length specification
If applicable, the letter "S" to indicate compliance with any of the supplementary requirements S1 to S6
Wall thickness grade number (per ANSI standard)
Heat number or factory number for traceability
Test method code
WR marking for welded pipes made from strips
Markings can be applied using spray, stamping, or roll marking depending on the manufacturer’s processes.
Conclusion
ASTM A335 P9 seamless steel pipes are a reliable solution for high-pressure, high-temperature applications. With strict requirements on chemical composition, manufacturing process, surface condition, and testing certification, these alloy steel pipes deliver consistent performance in demanding environments.
English
Español
Français
بالعربية
