Carbon steel pipes are made of iron and carbon as the main components, featuring high strength and excellent pressure resistance. Black steel pipes, on the other hand, are black pipes with a layer of natural oxide scale (or "blackening" treatment) retained on the surface of ordinary carbon steel pipes.

Black carbon steel pipe is a type of carbon steel pipe that has not undergone any coating treatment. Its surface is covered with a natural black layer of iron oxide, hence the name black carbon steel pipe.

ASME B16.5 is a key standard for the manufacture of pipe flanges and flange fittings with diameters ranging from NPS ½ "to NPS 24" (approximately 15 mm - 600 mm) and pressure ratings from 150 to 2500.

A flange is a connecting component used to connect pipes, valves and other equipment in a pipeline system. It can establish a firm connection and prevent leakage of pipes or valves and other equipment.

Elbow is a common pipe component, mainly used to change the flow direction and layout of pipelines. Its essence is to make a certain Angle on the pipeline to enable the medium to turn smoothly.

Elbows, as key components for changing the flow direction of media, are often used in the design and construction of pipeline systems.

ASTM A106 is a standard for seamless carbon steel pipes formulated by the American Society for Testing and Materials (ASTM), and is widely used for conveying high-temperature services (such as oil refining, chemical industry, boilers and petrochemical plants).

API 5L X70 pipe is a high-strength conduit manufactured in accordance with the American Petroleum Institute (API) 5L specification for Steel pipes for Pipeline transportation, where "X70" indicates its minimum yield strength of  70 ksi (approximately  485 MPa).

ASTM A53/A53M is a standard for carbon steel pipes, covering seamless and welded (including resistance welded and furnace welded) pipes. A53 pipes come in a variety of different types and grades and are commonly used in applications such as machinery, pressure systems, and structural supports.

ASTM A53/A53M is the standard for carbon steel pipes of the American Society for Testing and Materials (ASTM), covering two major categories: Seamless and welded (including resistance welding ERW and furnace welding SAW).

ASTM A53 is a carbon steel standard for mechanical, pressure and structural applications, applicable to steam, water, gas and air conveying systems, and is also often used in structural applications.

X52 indicates that the minimum yield strength of this grade of pipe is 52 ksi.

In industrial boilers and heat exchange systems, the material, size, tolerance, chemical composition and mechanical properties of boiler tubes need to comply with specific national or international standards.

Stainless steel pipes are widely used in fields such as chemical engineering, petroleum and natural gas, food processing, pharmaceuticals, water treatment and architectural decoration due to their excellent corrosion resistance, strength and aesthetic appeal.

With the increasingly strict requirements for pipeline performance and safety in the industrial field, ASTM International has formulated a series of technical specifications for carbon steel pipes covering different temperatures, pressures and applications.