ASTM A36 is a widely used carbon structural steel that meets American Society for Materials and Experimentation (ASTM) standards. ASTM A36 steel plate is widely used in construction, machinery manufacturing and heavy industry because of its high strength, good mechanical properties and easy workability.

Stainless steel is a material widely used in piping systems because of its excellent corrosion resistance, strength and versatility, and is the second most widely used material in the process industry after carbon steel.

Alloy steel has become one of the key materials in modern pipe systems because of its excellent properties and diverse applications. By adding one or more alloying elements on the basis of carbon steel, such as chromium, nickel, molybdenum, vanadium, etc. Alloy steel has higher strength, durability and corrosion resistance, and is widely used in many industries.

Mild steel black pipes has an important position in the field of modern industry and construction, it not only has good weldability and processability, but also has good economic benefits, has a wide range of applications and important position in modern construction, industry, pipeline transportation and other fields, is an economic and practical basic engineering materials.

Carbon steel is a kind of metal material with iron and carbon as the main components, according to the different carbon content is divided into low carbon steel (below 0.25%), medium carbon steel (0.25%-0.60%) and high carbon steel (more than 0.60%). Carbon steel has high strength and durability, is easy to process and weld, and at the same time is low cost, so it has become one of the most commonly used materials in industrial and civil pipeline engineering.

Welded steel pipes can be divided into many types according to the welding process and use, including straight seam submerged arc welded pipe (LSAW) and spiral submerged arc welded pipe (SSAW).

ERW (resistance welded steel pipe) and SSAW (spiral welded steel pipe) are two common types of welded steel pipe.

Seamless steel tube is a kind of high performance industrial material, its quality is affected by many factors.

Pipe fittings are a key component in a pipe system that connects, transforms, controls and supports pipes. They play a vital role in a variety of industrial sectors, including petroleum, chemicals, power, metallurgy, shipping, and construction.

Schedule 40 carbon steel pipe is a medium specification pipe, and Schedule (SCH) is a unit of measurement for the nominal wall thickness of the steel pipe.

Welded steel pipes are often used in industrial production, mechanical manufacturing and daily life, and welded steel pipes have an obvious feature - clearly visible welds. The treatment of the weld is a very important link, which can directly affect the service life and safety performance of the steel pipe.

Seamless steel pipe was the default choice for critical, high-pressure applications, while Electric Resistance Welded (ERW) pipe was limited to low-pressure utilities.

Annealing treatment is an important heat treatment tool in the manufacturing process of seamless steel pipe, which is often used to improve the mechanical properties of steel pipe, eliminate internal stress and improve processing performance. Annealing can eliminate certain defects caused by hot working of steel, or prepare for later cutting and final heat treatment.

Straight Welded steel pipes can be divided into two main types according to the welding method: ERW (Electric Resistance Welded Pipe) and LSAW (Longitudinal Submerged Arc Welded Pipe). The two have significant differences in production process, raw material selection, welding method, weld quality and appearance, and are suitable for different engineering needs.

The spiral submerged arc welded steel pipe used in the drainage system is exposed to humid air, soil and other corrosive environment for a long time, and is prone to corrosion. In order to extend its service life and ensure safety and reliability, comprehensive anti-corrosion measures are required.