Alloy Steel Pipes for Chemical Industry

• ​Introduction

Alloy steel pipes for the chemical industry are specialized pipes made by adding alloying elements such as chromium (Cr), molybdenum (Mo), vanadium (V), and nickel (Ni) to carbon steel. These pipes are widely used in the chemical industry, playing a crucial role in transporting various chemical media, including corrosive fluids, high-temperature and high-pressure gases, and liquefied substances. They ensure the stable operation of chemical production processes and the safe transmission of media.

• ​Main Functions

Media Transportation：They are capable of safely transporting highly corrosive chemical substances, high-temperature steam, and high-pressure gases, ensuring the smooth progress of chemical reactions and production processes.​

Resistance to Harsh Conditions：Alloy steel pipes can withstand extreme conditions such as high temperatures, high pressures, and corrosive environments, effectively extending the service life of the pipeline system and reducing maintenance costs.​

Structural Support：In complex chemical equipment and pipeline systems, they provide reliable structural support, maintaining the stability of the entire system.

• ​Tubing Standards

ASTM A213；ASTM A335； EN 10216-2； GB/T 5310，GB/T 6479，GB/T 9948.

• ​Material & Performance

T2/ P2，T12/ P12，T22/ P22，T23/ P23，T36/ P36，T91/ P91，T92/ P92； 13CrMo4-5，10CrMo9-10，15NiCuMoNb5-6-4，X10CrMoVNb9-1，X10CrWMoVNb9-2； 12CrMoG，15CrMoG，12Cr2MoG，07Cr2MoW2VNbB，15NilMnMoNbCu，10Cr9Mo1VNbN，10Cr9MoW2VNbBN；

Corrosion Resistance：Alloy steel pipes show excellent resistance to various chemical media, reducing the risk of pipeline corrosion and leakage.​ High – Temperature and High – Pressure Resistance：They can maintain good mechanical properties under high – temperature and high – pressure conditions, ensuring the safety and reliability of the pipeline system.​ Mechanical Properties：With high strength, good toughness, and excellent fatigue resistance, they can meet the mechanical requirements of different chemical engineering projects.

• ​Manufacturing Process

Raw Material Preparation：High-purity alloy steel billets are selected and inspected for chemical composition and impurities.

Hot Rolling：The billet is heated and rolled into a hollow tube via a piercing mill, or extruded to form the initial pipe shape.

Heat Treatment： Normalizing：Improves microstructure and mechanical properties. Tempering：Reduces internal stress and enhances toughness.

Cold Drawing/Expanding (Optional)：Fine-tunes dimensions and surface finish for precise applications.

Non-Destructive Testing (NDT)：Ultrasonic testing (UT), eddy current testing (ET), and hydrostatic pressure testing are conducted to ensure freedom from defects.

Surface Treatment：Deburring, coating, and marking for identification and protection.

• Specifications