China Standard 20G Round Seamless And Welded Pipes Hairline Mirror 6-12m

20G steel pipe is a Chinese standard steel grade (corresponding grades internationally: Germany St45.8, Japan STB42, USA SA106B). It is the most commonly used steel for boiler pipes, with chemical composition and mechanical properties similar to 20 steel plates. This steel has certain strength at room temperature and medium to high temperatures, low carbon content, good plasticity, and toughness, and it exhibits good cold and hot forming and welding properties.

20G steel pipe is mainly used in the manufacturing of high-pressure and higher-parameter boiler fittings, low-temperature superheaters, reheaters, economizers, and water walls. For example, small-diameter pipes are used as heating surface pipes with wall temperatures ≤500°C, as well as water wall pipes and economizer pipes. Large-diameter pipes are used for steam pipelines with wall temperatures ≤450°C, headers (economizer, water wall, low-temperature superheater, and reheater combined headers), and medium temperature ≤450°C pipeline accessories. As carbon steel will undergo graphitization when operating above 450°C for a long time, it is advisable to limit the maximum long-term operating temperature of the heating surface pipes to below 450°C. Within this temperature range, the strength of this steel meets the requirements of superheaters and steam pipelines, and it exhibits good oxidation resistance, plasticity, toughness, and welding performance, making it widely used.

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

• Application

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

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.