ASTM A335 P11、P12、P22 Carbon Steel Seamless Pipe For Thermal Power Plant

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The ASTM A335 P11, P12, and P22 seamless pipes are ferritic alloy-steel pipes designed for high-temperature service, and they are particularly suitable for high-pressure environments. Here's a concise overview of each, highlighting their properties and applications:

•  ASTM A335 P11 Seamless Pipe

- **Composition:** Contains 1.0%-1.5% Chromium and 0.44%-0.65% Molybdenum.
- **Features:** Offers a balanced combination of high temperature strength and resistance to wear and tear, while being relatively cost-effective.
- **Applications:** Commonly used in industries such as power plants, petroleum, boiler equipment, and construction due to its flexibility and durability in high-temperature services.

• ASTM A335 P12 Seamless Pipe

**Composition:** Contains 0.8%-1.25% Chromium and 0.44%-0.65% Molybdenum.
- **Features:** Provides enhanced strength and resistance at elevated temperatures, with a bit higher mechanical properties than P11.
- **Applications:** Ideal for use in refineries, power plants, and thermal power stations where temperatures and pressures are high.

• ASTM A335 P22 Seamless Pipe

- **Composition:** Contains 1.9%-2.6% Chromium and 0.87%-1.13% Molybdenum.
- **Features:** Offers excellent resistance to both high temperatures and pressures, superior material strength, and improved oxidation resistance.
- **Applications:** Widely used in sectors like power generation and petrochemical industries, especially suitable for high-pressure boilers, superheaters, and heat exchangers.

• General Characteristics of ASTM A335 Pipes:

- **Durability:** All these grades are noted for their durability and resistance to tough working environments.
- **Heat Treatment:** These pipes are generally given a normalization and tempering heat treatment to align their mechanical properties with the demanding conditions of high temperature and pressure.
- **Weldability:** While they are weldable, certain grades may require pre and post-weld heat treatments to avoid weld degradation.

These seamless pipes are critical components in applications requiring robust performance at high temperatures and pressures, ensuring operational safety and reliability across various industries.

• Product Types

Seamless steel pipes, seamed steel pipes , pipes made of various types of carbon steel and other special metals

• Standard

GB/T 5310,EN10216-2

ASTM:A672,A691,SA106M,SA335M etc.

• Materials

20G,15CrMoG,12CrlMoVG

SA106-B,C

SA335-P11,P12,P22,P91,P92

15NiCuMoNb5-6-4

A691-11/4Cr,A691-21/4Cr,A672-B70

06Cr19Ni10,SA312-TP347H,304,316L