Carbon steel casing refers to the oil well casing made of carbon steel material, which is used to protect the wellbore formed during drilling, isolate different formations, and prevent downhole fluid from invading the well.

Alloy steel pipe refers to the steel pipe made by adding one or more alloy metals (such as chromium, nickel, molybdenum, vanadium, titanium, etc.) to the carbon steel substrate. The addition of these alloying elements can effectively improve the mechanical and chemical properties of steel.

ASTM A179 Carbon steel pipe is a carbon steel pipe manufactured according to ASTM A179 standard.

ASTM A53 B ERW carbon steel pipe is a resistance welded carbon steel pipe manufactured according to ASTM A53 standard, mainly used in the pipeline system to withstand general pressure and transport media.

API 5L GR.B Carbon steel pipe is an American Petroleum Institute (API)5L carbon steel pipe.

Electric fusion welding refers to a kind of electron beam welding, which uses the directional impact kinetic energy of the high-speed electron beam to convert into heating of the workpiece, so that the workpiece leaves the melt and forms a weld.

Carbon steel mechanical pipe refers to a tubular product made of low carbon or low carbon alloy carbon steel as raw material through cold working process.

ASTM A234 is a standard developed by the American Society for Materials and Testing (ASTM) for carbon steel and alloy steel pipe fittings used in medium to high temperature environments.

ASTM A672 Carbon steel pipe is manufactured according to ASTM A672 standards. ASTM A672 is the standard specification for electric fusion welded steel pipes for medium temperature and high voltage service, made from pressure vessel quality steel plates of several chemical compositions and strength grades, and made by electrofusion welding of filler metal.

ASTM A671 EFW Carbon steel pipe is a carbon steel pipe manufactured according to ASTM A671 standard, and its manufacturing process is EFW (Electric Fusion Welding) technology.

ASTM A213 Stainless Steel seamless pipe is a tubular product manufactured according to ASTM A213 standard, mainly used in boilers, superheaters and heat exchangers to transport high temperature fluids.

The A333 Gr 6 Carbon steel pipe is a low temperature carbon steel pipe (LTCS) that is ASTM A333/A333M standard.

ASTM A269 Stainless steel pipe is a stainless steel pipe produced in accordance with the American Society for Materials and Testing (ASTM) A269 standard, which is mainly used in low and medium pressure fluid delivery systems.

ASTM A519 Carbon steel mechanical pipe is a cold processing mechanical pipe produced according to ASTM A519 standard, mainly used in mechanical equipment, automobiles, industrial components and other fields.

Schedule 40 Carbon steel pipe is a pipeline product according to American standards, widely used in water, gas, oil and natural gas and other low pressure transmission systems.