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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

Established in 2018 with a registered capital of 300 million yuan, Beijing Hownew Energy Technology Group Co., Ltd. owns three holding subsidiaries: Cangzhou Yuantuo Piping Equipment Co., Ltd., Beijing Shenfupeng Piping Equipment Development Co., Ltd., and Hownew Technology (Hong Kong) Co., Ltd. Hownew Group is a comprehensive enterprise integrating technology research and development, product manufacturing, production and sales, plus installation and maintenance. It specializes in providing professional piping and pipe fittings, as well as piping design, manufacturing, and installation and maintenance services for domestic and international boiler, power, chemical, gas, and solar thermal industries.
The company always adheres to the working attitude of "honesty and realism, professionalism and concentration, pragmatism and efficiency", and takes technical strength as the foundation, resource background as the basis for development, and customer needs as the future trend. It closely follows the characteristics of industry technology and industry development, and continuously optimizes the design. The company is dedicated to providing customers with the highest quality and most satisfactory services.

Hownew Technology (Hong Kong) Co., Ltd.: In 2019, in response to the national initiative of "One Belt and One Road" and the Group's expansion into international markets, Hownew Group established Hownew Technology (Hong Kong) Co., Ltd. in Hong Kong. This serves as the Group's platform for international business development. The company mainly offers pipes and pipe fittings (carbon steel, stainless steel, alloy steel) such as elbows, tees, bends, reducers, and crosses to industries such as power, petrochemical, chemical, petroleum, gas, solar thermal, and shipbuilding. All products adhere to American standard ASME (ANSI), European standard EN, German standard DIN, Japanese standard (JIS), and can also be customized according to specific customer needs.