Casing is a series of steel pipes that are run into a drilled oil well to stabilize the well, keep contaminants and water out of the oil stream, and prevent oil from leaching into the groundwater. Casing is installed in layers, in sections of decreasing diameter that are joined together to form casing strings.

Thick-walled steel pipe is a kind of economical section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames and steel scaffolding used in construction.

Galvanized steel pipe is steel pipe that has been galvanized. This coating protects the steel from corrosion, and it is most commonly used in outdoor buildings, such as fences and handrails, or for some indoor plumbing.

The application of spiral welded steel pipes can be traced back to the beginning of the last century，It has a history of nearly 100 years. First, the Germans invented the two-roll oblique piercing machine in 1885, and then invented the periodic tying machine in 1981; Tiffel invented the automatic pipe tying machine (also known as the head tying machine), and began to form the modern spiral steel pipe industry.

Steel pipe is a common choice for building projects for a variety of reasons, but one of the most frequently mentioned ones is steel's adaptability.

Galvanized steel pipes are steel pipes that have been galvanized. This coating protects steel from corrosion, and it is often used in outdoor construction, such as fences and handrails, or some indoor plumbing......

People use the words pipe and tube interchangeably, and they think that both are the same. However, there are significant differences between pipe and tube. The short answer is.. A PIPE is a round tubular to distribute fluids and gases, designated by a nominal pipe size (NPS or DN) that represents a rough indication of the pipe conveyance capacity; a TUBE is a round, rectangular, squared or oval hollow section measured by outside diameter (OD) and wall thickness (WT), expressed in inches or millimeters.

API 5L Grade B pipe is a common grade pipe for oil and gas pipeline transmissions. It also called L245 Pipe refer ISO 3183, named by minimum yield strength 245 Mpa (355,000 Psi). Equivalent material ASTM A106 B or ASTM A53 B, which have similar value on chemical composition, mechanical properties, and applications. API 5L B covers PSL1, PSL2, Sour Services, for onshore and offshore pipelines. Manufacturing types including seamless and welded.

People always confused about how to describe steel pipe dimensions (sizes) in correct ways, or how to clarify to seller what exactly pipe size we are going to purchase. In case any misunderstandings or a different size we purchased, that will be a big trouble. So, what are the exactly right ways to express the steel pipe dimensions? For your better understanding, we will explain from below aspects: 3 characters for a pipe dimension Dimension Standards of carbon and stainless steel pipe (ASME B36.10M & B36.19M) Pipe Size Schedule (Schedule 40 & 80 steel pipe means) Means of Nominal Pipe Size (NPS) and Nominal Diameter (DN) Steel Pipe Dimension Chart (Size chart) Pipe Weight Class Schedule (WGT) And finally, we will tells you how to describe steel pipe dimensions & sizes correctly.

Seamless steel pipe is manufactured by the round steel billet, through hot rolling, cold rolling or cold drawn processes, no seam on the pipe body. Welded steel pipe is manufactured by flat steel plate, with welding seam on the pipe body. Including ERW pipe, LSAW pipe, SSAW pipe.

Seamless steel pipes can be used to transport fluids (such as natural gas, oil, water, etc.), certain solid materials, etc., and are also an economical steel. The use of steel pipes to make grids, pillars and mechanical supports for building structures can reduce costs.

Galvanized steel pipe is divided into two categories - hot dip galvanized steel pipe and cold galvanized steel pipe. Cold galvanized steel pipe is electro-galvanized steel pipe, the content of galvanized is very small, only about 10g to 20g per square meter, its corrosion resistance is not as good as hot-dip galvanized steel pipe;