1. Material of Drill Pipe Drill pipes are generally made of high-strength alloy steel. This alloy steel consists of various elements such as steel, chromium, molybdenum, manganese and silicon, and is characterized by high strength, high toughness and corrosion resistance. The manufacture of drill pipe must follow API specifications to ensure its quality and performance.

1. Jointed Steel Drill Pipe Jointed steel is a steel made of a combination of two or more materials with high strength and wear resistance, which is widely used in oil drilling. Jointed steel drill pipe consists of jointed steel pipes, which have better corrosion resistance and are suitable for general drilling work.

I. Definition of high carbon steel High carbon steel is a steel material with carbon content between 0.6%~2.5%, which is a kind of high strength and high hardness steel. Among them, 0.7%~0.8% is the common high carbon steel carbon content range.

First, lining anti-corrosion Lining anticorrosion is to prevent the corrosion of the pipe wall by coating the inside of the pipe with chemically stable anticorrosive materials, such as fluorine plastic, polyester and so on. This method is suitable for pipelines conveying various chemical liquids, such as acid, alkali, etc., but the price is high, and the scope of application has certain limitations.

The proportion of spiral welded steel pipe for water supply pipe is quite high in the market. Double-sided submerged arc spiral welded steel pipe is to feed the strip steel into the welded pipe unit, and then gradually roll up the strip steel by rolling through multiple rolls to form a round billet with an opening gap.

Steam piping is an important and indispensable facility for industrial production, and large diameter seamless steel pipe is a key component in the construction of steam piping. Seamless steel pipe has excellent strength and pressure resistance, can adapt to high temperature and high pressure working environment, to ensure the stable transmission of steam, to ensure the smooth progress of industrial production.

First, the basic concept and characteristics of stainless steel pipe Stainless steel pipe, as the name suggests, is a kind of pipe made of stainless steel material. Stainless steel is an alloy, composed of iron, chromium, nickel and other elements, with excellent corrosion and oxidation resistance. Stainless steel pipe is precisely the use of this property, widely used in chemical, petroleum, food, medical and other fields, to ensure that the medium conveyed will not be corroded by the pipe wall and qualitative changes.

As one of the most important products in the steel industry, steel pipes are widely used in various fields. Different projects and needs require the use of different types and materials of steel pipe.

There are many types of stainless steel, stainless steel classification according to the composition can be divided into: 2XX series - chromium - nickel - manganese series austenitic stainless steel; 3XX series - chromium - nickel series austenitic stainless steel; 4XX series - high chromium series ferritic and martensitic steels; 5XX Series - Low Chromium Series Heat Resistant Steels Martensitic Steels; Series 6XX - Precipitation hardening steels; The most commonly used series here are 2XX/3XX/4XX, specifically each large series is divided into many fine grades, such as 201,202,304,316,416 and so on.

Stainless steel, does not simply refer to one type of stainless steel, but to more than one hundred types of industrial stainless steel, each of which performs in its specific area of application. Specific specifications and models, according to the state of organization can be divided into the following types: