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2024-11-08

ASTM SA/A106 Seamless Carbon Steel Pipe

This specification covers carbon steel pipe for high temperature service. These pipes are suitable for welding, bending, flanging, and similar forming operations. Mechanical tests on the specimens shall include tensile, bending, flattening, hydrostatic, and nondestructive electrical tests. Specimens for bend tests shall consist of sections cut from the pipe. For flattening tests, the ends of the specimens shall be smooth and free of burrs unless performed on cut ends. All tests shall be conducted at room temperature. If any specimen develops a defect, it may be discarded and replaced with another specimen. Retesting shall be permitted if the specimen is scratched before testing. Retesting shall also be permitted if the specimen breaks at an inner or outer surface defect.

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2024-11-08

Specifications and Advantages of carbon steel square tubes

Most of the materials we use now are composite materials, and there is almost no single element. For example, the steel we often use is an alloy composed of iron, carbon, silicon, manganese, phosphorus, sulfur and other elements. Everyone knows that iron is white or silvery white. What subverts people's cognition is that iron is relatively soft. Is it hard to imagine that iron is soft, so pure iron cannot be used. The steel-like body we often say, hard as iron, etc., are all gone. Therefore, the steel we use in daily life is an alloy, which utilizes some characteristics of other elements, such as the hardness of carbon. Today we are talking about carbon steel square tubes, which refers to the carbon content in steel. Carbon steel generally does not have any corrosion resistance. The hardness is greater than that of pure iron. Of course, carbon is also controlled to a certain extent. Because ordinary carbon steel square tubes are not rust-proof, stainless steel carbon steel square tubes have also been developed accordingly.

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2024-11-07

Difference between seamless black steel pipe and black iron pipe

Black steel pipe is made of ungalvanized steel. Its name comes from the dark iron oxide coating on its surface in a scaly shape. Because its surface is dyed dark by iron oxide during the manufacturing process, it is called black steel pipe. According to the production process, black steel pipe is divided into two main types: seamless pipe and welded pipe. ASTMA53/A53M is the standard specification for pipes, steel, black and hot-dip galvanized, welded and seamless.

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2024-11-07

ASTM A106 Grade B Pipe Specification

ASTM A106/ASME SA106 is a standard specification for seamless carbon steel pipe for high temperature service. It includes three grades: A, B and C, of which Grade B is the most commonly used. This type of pipe is used in various industries, including piping systems for oil and gas, water and mineral slurry transportation. It is also used in boiler systems and for building and structural purposes.

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2024-11-06

API Coupling and Threads for Casing and Tubing

A casing coupling is a short pipe used to connect two threaded casings. API couplings are also called OCTG couplings and nipples. The internal threads are machined to match the external threads of the casing long joints. The two joints of the casing are screwed into the ends of the coupling, which is usually made of the same grade of steel as the casing to ensure its strength. All casing couplings are manufactured in accordance with the latest version of the API 5CT specification and are usually made seamlessly, with the same material grade as the pipe body (such as API 5CT K55/J55, N80, L80, P110, etc.). The PSL grade of the coupling is consistent with that of the casing, or a higher grade product is provided according to demand. Unless there are special requirements, the same heat treatment process is usually used.

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2024-11-06

Differences between Annealing, Normalizing, Tempering and Quenching of Seamless Steel Pipes

Many friends do not understand the meaning of annealing, normalizing, tempering and quenching of seamless steel pipes. If these concepts are confused, it is easy to cause irreversible consequences during the production and use of materials. Therefore, it is particularly important to correctly understand the various meanings of heat treatment of seamless steel pipes. Let's take a look at the heat treatment process of seamless steel pipes

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2024-11-05

Characteristics and uses of low carbon steel pipe

As the name implies, low carbon steel pipe is a steel pipe with a low carbon content. Generally speaking, there is a difference between low carbon steel pipe and seamless carbon steel pipe. Low carbon steel pipe refers to a steel pipe with a carbon content of less than 0.3%, and seamless low carbon steel pipe is one of them. Low carbon steel pipes include general steel pipes, medium and low pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes and other steel pipes, as well as carbon thin-walled steel pipes, alloy thin-walled steel pipes, stainless steel thin-walled steel pipes, special-shaped steel pipes, etc.

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2024-11-05

Steel Pipe Dimensions & Sizes Chart (Schedule 40, 80 Pipe) Means

Steel pipes are fabricated in different schedules for different applications. Where the schedule means the measurement of the pipes, specifically the thickness of the wall. As the schedule number increases the thickness of the wall increases where the diameter can still remain constant or varying as per customers requirements. As the internal diameter plays a vital role in providing fine workability as it bears all the pressure and heat. These pipes have various industrial applications and have a huge commercial demand. Unlike Schedule 10 pipes and Schedule 40 pipes, the Schedule 80 pipes have higher strength comparatively and it is designed for high temperature application and have a high pressure bearing capacity.

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2024-11-04

Introduction and Advantages of Galvanizing Process

Galvanizing (such as galvanized seamless pipe) is the process of adding a zinc coating to the surface of steel or iron. Because zinc acts as a sacrificial coating, it protects the steel or iron underneath, thereby extending the service life of the metal component.

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2024-11-04

Will 316 Stainless Steel Corrode and Rust?

316 stainless steel is a grade of stainless steel produced according to the American ASTM standard. 316 is equivalent to China's 0Cr17Ni12Mo2 stainless steel. Japan also quoted the American name and called it: SUS316. 316 stainless steel is the second most widely used steel after 304. It is mainly used in the food industry, watch accessories, pharmaceutical industry and surgical equipment. The addition of molybdenum element gives it a special corrosion-resistant structure. Because it has better chloride corrosion resistance than 304, it is also used as "marine steel". SS316 is usually used in nuclear fuel recovery devices.

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2024-11-01

Common connection methods of seamless steel pipes

There are many ways to connect steel pipes (seamless pipes, welded steel pipes, etc.), and the commonly used ones are: crimping, union, compression, push rod, tapered thread, socket welding, union flange connection, welding, and a series of connection methods that combine welding and traditional connection. Different connection methods have different production principles and different applicable fields, but in general, they all have one thing in common, that is, easy installation, firmness and reliability. You can choose a suitable connection method based on the actual situation, because the connection method also has certain requirements for the diameter of the steel pipe.

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2024-11-01

API 5CT N80 Well Pipe Casing

API 5CT is the specification for casing and tubing used in the oil and gas industry. This standard specifies the technical delivery conditions for steel pipes (including casings, tubing, and pup joints), coupling stock, coupling materials, and accessory materials, and sets the requirements for three product specification levels (PSL-1, PSL-2, PSL-3). The N80 grade is an API 5CT well pipe casing, primarily used in oil wells with various end connections (such as non-thickened ends or externally thickened ends).