Company News

• 2024-08-08

  What is ASTM A500 steel pipe pile?

  ASTM is the American Society for Testing and Materials standard, and ASTM A500 is the standard for welded steel pipe (referring to the standard specification for cold-formed welded pipe). In the international standard classification, astm+a500+/+a500 involves pipe parts and pipes, wires and cables, and steel products. In the Chinese standard classification, astm+a500+/+a500 involves steel pipes, cast iron pipes, and bare wires. A500 steel pipe piles have many different names - for square and rectangular, it is called structural pipe, or high-speed steel (or hollow structural parts). A500 products are used in applications that require load-bearing applications. Due to its aesthetic appeal, A500 is often used as a display in the Rock Hall of Fame such as the Cleveland Architectural Wonder. ASTM A500 covers cold-formed welded, square, rectangular, and "special" tube, electric resistance welded (ERW steel tube) carbon steel pipe for welded, riveted, or bolted construction applications.

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• 2024-08-07

  Welded Steel Pipes

  Welded steel pipes, also known as welded pipes, are made by curling and forming steel plates or strips and then welding them together, usually to a fixed length of 6 meters. The production process of welded steel pipes is simple, highly efficient, with many varieties and specifications, and requires less investment in equipment, but their general strength is lower than that of seamless steel pipes. They are widely used in projects such as hydroelectric power stations, municipal drainage pipelines, and drinking water transportation. In specific manufacturing and applications, welded pipes are generally divided into two types according to the welding method: LSAW welded pipes and SSAW welded pipes.

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• 2024-08-07

  American Standard Seamless Steel Pipe

  The expression method of the wall thickness grade series of ANSI seamless steel pipe is different in different implementation standards. There are three main ways to express the wall thickness of ANSI steel pipe: Indicated by ANSI steel pipe number (Sch): For carbon steel seamless pipe wall thickness, there are 10 grades: Sch10, 20, 30, 40, 60, 80, 100, 120, 140, 160, etc.

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• 2024-08-06

  How to connect PVC pipe with steel pipe ?

  In modern piping systems, the connection of PVC (polyvinyl chloride) pipes with steel pipes is a widely concerned issue. This connection method is used in construction, industry, and agriculture. Due to the significant differences in the physical and chemical properties of PVC and steel pipes, special attention needs to be paid when connecting to ensure the reliability and durability of the connection. This article will explore various connection methods in detail, including flange connection, adhesive connection, threaded connection, etc., and explain them in combination with actual application scenarios.

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• 2024-08-06

  What Is a Pipe Spool? A Complete Guide

  Pipe spool refers to a small section of pipe with flanges and fittings prefabricated from a pipe manufacturer. Since they are exposed to the natural environment, water and other natural electrolytes in the pipeline system, they are often prone to corrosion. When maintaining pipe spools, adequate preventive and repair monitoring must be carried out to ensure their normal operation.

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• 2024-08-05

  Anti-corrosion of the inner wall of oil drill collars

  During the oil drilling process, the drill collar is an important component connecting the drill bit and the ground equipment. Due to the flow of drilling fluid and the presence of corrosive media in the drilling environment, the inner wall of the drill collar is susceptible to corrosion, which not only affects the drilling efficiency, but also greatly shortens the service life of the drill collar. In order to deal with this problem, scientists and engineers have developed a variety of anti-corrosion methods to extend the service life of the drill collar and reduce drilling costs. This article will introduce in detail an advanced anti-corrosion method for the inner wall of oil drill collars and its practical application effect.

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• 2024-08-05

  Materials and Applications of Casing and Tubing

  Casing and tubing are essential equipment in the process of oil and gas extraction. Their main functions are to provide structural support and protection for the wellbore while transporting fluids such as oil and natural gas. In order to meet these functions, casing and tubing must have characteristics such as corrosion resistance, high temperature resistance, high pressure and high strength. This article will introduce the materials used for casing and tubing and their applications in detail.

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• 2024-08-02

  How to use the pup joints correctly ?

  Pup joints are essential components in industrial pipeline connections. Common types include threaded pup joints (double-threaded, single-threaded, and flat-threaded) and flange-connected pup joints. A pup joint is essentially a short piece of tubing; compared to regular tubing, the main difference is its length. Standard lengths include 0.25m, 0.5m, 1m, and 1.5m, and they are used for assembling downhole tubing strings. Pup joints are typically classified into tubing pup joints and casing pup joints.

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• 2024-08-02

  Advantages of Screen Casing

  Screen casing, a critical tubular material used in oil and gas extraction, features a large diameter and serves to stabilize well walls or boreholes. Its primary function is to be fixed in place with cement, preventing wellbore separation from rock formations and wellbore collapse. This ensures the circulation of drilling mud, thus supporting the drilling process. Screen casing for oil extraction is typically made from seamless steel pipes, a material known for its high-temperature resistance, corrosion resistance, and high strength, making it well-suited for filtration and screening tasks in oil fields. Additionally, seamless steel pipes ensure the safe and stable transportation of crude oil and natural gas. Screen casing is widely used in various oil exploration activities, including the rehabilitation of old wells, new well drilling, test wells, offshore oil extraction wells, and oil pumping pipes. It is also suitable for horizontal wells, sidetracked wells, radial branched wells, or open-hole and gravel-packed screen casing completions.

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• 2024-08-01

  How to Prevent Corrosion in Casing Pipes

  Oil pipeline engineering is a crucial component of the oil industry, and corrosion prevention is a key aspect of pipeline projects. Casing pipes are used to transport various media, including oil, natural gas, and chemical products, so ensuring their corrosion protection is vital for safe operation. Casing pipe, as a specialized mode of transportation, have been in use for over a century. With the development of the national economy, the advantages of pipeline oil transportation have become increasingly evident. Most oil pipelines use carbon steel seamless pipes, straight seam resistance welded pipes, or spiral welded pipes. Pipelines are generally installed either above ground or buried underground. Regardless of the installation method, when metal pipes come into contact with surrounding media, chemical or electrochemical reactions can cause corrosion. Corrosion is a key factor affecting the reliability and lifespan of pipeline systems. It can alter the appearance, color, and mechanical properties of metal pipes, impact the quality of transported oil, shorten the lifespan of pipelines, and, in severe cases, lead to leaks, environmental pollution, or even make the pipeline unusable. As oil extraction progresses to the mid and late stages, corrosion issues become more prominent, often resulting in significant economic losses and severe social consequences due to accidents caused by corrosion. Therefore, understanding the causes of corrosion, the mechanisms, influencing factors, and control methods of corrosion in oil and gas pipelines, and implementing effective protective measures are of utmost importance. Given the complexity and variability of corrosion, no single corrosion prevention technology is universally effective. Therefore, a comprehensive understanding of the corrosion environment and the adoption of appropriate material selection and design strategies for prevention are necessary.

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• 2024-08-01

  Measuring Casing and Tubing Pressure

  In oil and gas extraction, casing and tubing are indispensable types of pipes. The pressure ratings and differences in pressure they endure are crucial factors determining the safe operation of oilfield equipment and the effectiveness of extracting oil and gas. This article explores the pressure aspects of casing and tubing, detailing their design, production, usage, and related technical requirements.

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• 2024-07-31

  Inspection Methods for Well Pipe Casing

  Well pipe casings(casing pipe), also known as oil-specific pipes, are primarily used in the drilling of oil and gas wells and the transportation of oil and gas. These pipes include oil drill pipes, oil casings, and tubing. The oil drill pipes are used to connect the drill collar and the drill bit and transmit drilling power. During drilling and completion, oil casings support the wellbore, ensuring the smooth progress of the drilling process and normal operation after completion. The tubing is responsible for transporting oil and gas from the bottom of the well to the surface. Oil casings are considered the lifeline of well operations, as the geological conditions vary, and the downhole stress state is complex, combining tension, compression, bending, and torsion. This complexity demands high quality from the casing pipes. If the casing is damaged for any reason, it may lead to reduced production or even the abandonment of the entire well. Based on the strength of the steel itself, oil casings can be divided into different steel grades, such as J55, K55, N80, L80, C90, T95, P110, Q125, and V150. The well conditions and depth determine the steel grade used. In corrosive environments, the casing must also possess corrosion resistance. In geologically complex areas, the well pipe casing needs to have collapse resistance.

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