Oil Country Tubular Goods (OCTG: Oil Country Tubular Goods) and Line Pipe are collectively known as Oil Specialized Pipe. Petroleum Specialized Pipe is actually a deep-processed product of steel pipe, including Oil Country Tubular Goods (OCTG) and Oil & Gas Transportation Pipe (OGTP). Drill pipes, casing, tubing, drill collars, square drill pipes, etc. are collectively called oil well specialized pipes.

What is NACE? NACE is the International Association of American Corrosion Engineers, a civil society organization in the field of international corrosion and protection, founded in 1943 by 11 pipeline industry corrosion engineers, and is now the world's largest organization for the dissemination of corrosion knowledge Knowledge of the organization, its responsibility is to improve public awareness of corrosion control and prevention.

The permissible deviation of the outer diameter and wall thickness of seamless steel pipe is not the same as that of different standards. In recent years, the proportion of seamless steel pipe used in our country is getting bigger and bigger, and due to its wide range of uses, the quality of seamless steel pipe also puts forward high requirements, in which the deviation of the outer diameter and wall thickness of seamless steel pipe is one of the important indexes of its quality. Wall thickness deviation will directly affect the use of seamless steel pipe.

ASTM A53 is a steel pipe standard for the manufacture of welded steel pipe that is commonly used to transport fluids such as water, oil and gas. This steel pipe is galvanized to increase its corrosion resistance and service life.

Relevance: It is an iron ring used to protect the pipe or to facilitate the installation of the pipe. Difference: 1, the nature of different: casing is a kind of electric conductor into the electrical equipment or through the wall of an insulating device. Oil pipe is a pipe that transports crude oil and natural gas from the oil and gas layer to the surface after drilling is completed.

Drill pipe and drill collar are commonly used tools in oil drilling, mainly for drilling, reaming and coring operations. Drill pipe is a long tube assembled from many similar tubes, which plays a role in conveying drill bits and mud in drilling. And the drill collar is a drilling tool with a slender shape, which can accurately collect cores on key strata and help geologists evaluate the nature of the reservoir.

JCOE is straight seam double-sided submerged arc welded pipe, LSAW steel pipe can be divided into high-frequency LSAW steel pipe and submerged arc welded LSAW JCOE steel pipe according to the production process. Submerged arc welded straight seam steel pipe according to its different molding methods are divided into UOE, RBE, JCOE, LSAW steel pipe, etc. JCOE steel pipe production process is simple, high production efficiency, low cost, the development of faster

A53Gr.B American Standard Thick Wall Steel Pipe is a kind of seamless steel pipe with the size of 168.3 millimeters (mm) * 14.27 millimeters (mm). This kind of steel pipe is usually made of carbon alloy steel with high strength and corrosion resistance, which is commonly used in the manufacture of pipelines, valves and pressure vessels that are subjected to high pressure.

​1. The production process of seamless steel pipe mainly includes the following steps: a. Preparation of raw materials: choose suitable steel billet, the requirements of the billet surface smooth, no bubbles, no cracks, no obvious defects. b. Heating: Heat the billet to a high temperature state, so that it has plasticity and is easy to be molded. c. Perforation: The heated billet is perforated into a billet by a perforating machine, i.e., the preliminary pipe is formed. d. Pipe Rolling: The billet is rolled several times to reduce its diameter and increase its wall thickness, while eliminating internal stress. e. Sizing: through the sizing machine on the final shape of the steel pipe, so that the diameter and wall thickness of the steel pipe to meet the standard requirements. f. Cooling: The steel pipe is cooled after sizing to increase its hardness and strength. g. Straightening: Straighten the cooled steel pipe to eliminate its bending deformation. h. Quality inspection: quality inspection of the finished steel pipe, including size, wall thickness, hardness, surface quality and other aspects of the test.

I. Overview of steel pipe specifications under British Standard The steel pipe specifications under the British Standard are mainly divided into two categories, one is formulated according to the metric system specifications, and the other is formulated according to the imperial system specifications. In the steel pipe specifications formulated according to the metric system specifications, the diameter unit is millimeters and the wall thickness unit is millimeters or inches; in the steel pipe specifications formulated according to the imperial system specifications, the diameter unit is inches and the wall thickness unit is SWG or BWG. In addition, there are some special steel pipe specifications, such as seamless steel pipe for structural use and boiler use, etc., which are different according to different applications as well as different manufacturing processes.