Company News

2025-09-24

ASTM A252 Grade 2 Steel & Pipe Specification

Based on the tensile strength and the yield strength the ASTM A252 is classified into three categories/grades: ASTM A252 Grade1/ ASTM A252 Grade2/ ASTM A252 Grade3, each standard has its own application scenarios, the most commonly used of which is the Grade2 standard.ASTM A252 is the standard specification for seamless and welded steel pipe used for steel pipe piles. Grade 2 is the intermediate grade of A252 with mechanical properties of 415 MPa tensile strength and 240 MPa yield strength, suitable for medium load construction conditions, commonly used for lighter loads and better soil conditions, such as small buildings, temporary structures, and landscaping projects.

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2025-09-23

Common Stainless Steel Welded Pipe Standards

Stainless steel welded pipe is a critical pipe material used in the petroleum, chemical, construction, machinery manufacturing, and energy industries. Its quality and performance are directly related to the safety and reliability of projects. To ensure product consistency and interchangeability, international and domestic organizations have developed a series of stainless steel welded pipe standards. These standards cover not only chemical composition, mechanical properties, and dimensional deviations, but also surface quality, welding processes, and inspection methods. The following describes common stainless steel welded pipe standards and their key features.

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2025-09-22

How to Choose the Right Schedule 40 Carbon Steel Pipe Manufacturer

Choosing the right Schedule 40 carbon steel pipe manufacturer is a critical decision. The quality of the pipe impacts safety, efficiency, and cost. With many suppliers in the market, it is important to know the key factors that define reliability.

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2025-09-19

JCOE LSAW Steel Pipe Forming Process

The JCOE straight seam steel pipe manufacturing process is a new welded steel pipe forming technology that emerged in the 1990s. The main forming process involves milling (or planing) the pre-welded steel plate joints, then pre-bending the steel plate widthwise. The forming process then proceeds in a sequential order of J, C, and O. The forming process involves multiple presses, each using a three-point bending die. Because the raw steel plate used for straight seam steel pipes is formed using multiple progressive die presses, the following basic issues must be addressed:

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2025-09-18

EN 10219 Welding Requirements and Test Standards

EN 10219 is the most authoritative European standard for cold-formed welded structural hollow sections. Its stringent regulations for cold-formed welded structural hollow sections are crucial for ensuring the quality and safe use of steel pipes. A thorough understanding of these requirements is crucial for steel pipe manufacturers, purchasers, and related engineering professionals.

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2025-09-17

SSAW Steel Pipe Production Process

Spiral welded pipe is the leader among welded pipes. The spiral welded pipe manufacturing process is not only one of the most efficient methods for producing steel pipe, but also offers a high degree of flexibility within the production range of diameters and wall thicknesses. This is why spiral welded pipe production began in areas where other welded pipe production processes were limited—whether producing transmission pipe, water pipe (AWWA), or oil and gas pipe (API).

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2025-09-17

Grades and Standards of Seamless High-Pressure Boiler Tubes

Against the backdrop of my country's rapid economic growth, the electric power industry, as a foundational industry, has experienced rapid development. Electricity is not only a source of power for industrial production but also a vital guarantee for people's daily lives. With increasing energy demand and the widespread construction of thermal power plants, the demand for high-pressure boiler tubes has steadily increased. As a key component of power plant boilers, seamless high-pressure boiler tubes play an irreplaceable role in energy equipment manufacturing.

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2025-09-16

Surface rust removal treatment of SSAW steel pipe

With the continued economic growth of my country, the country is vigorously developing the energy industry. Long-distance oil and gas pipelines are a crucial means of energy security. During the corrosion protection construction of oil and gas pipelines, the surface treatment of spiral steel pipe is a key factor in determining the service life of the pipeline's corrosion protection. It is a prerequisite for the strong bond between the anti-corrosion coating and the steel pipe. Research institutions have verified that in addition to factors such as the coating type, coating quality, and construction environment, the surface treatment of the steel pipe accounts for approximately 50% of the life of the anti-corrosion coating. Therefore, the surface treatment methods for spiral steel pipes should be strictly adhered to the requirements of the anti-corrosion coating specification for steel pipe surfaces, and continuous research, analysis, and improvement should be made.

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2025-09-15

Process Characteristics of Thermal Expansion for SMLS pipe

Thermal expansion treatments for seamless steel pipes are categorized into overall thermal expansion, surface thermal expansion, and chemical heat treatment. Thermal expansion treatment for seamless steel pipes generally utilizes overall thermal expansion. These treatments typically involve heating, holding, and cooling, all of which can potentially result in defects.

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2025-09-12

Advantages and Uses of Ductile Iron Pipes in Water Transport

Water is one of the most vital resources for human life, economic development, and environmental sustainability. To ensure its safe and reliable delivery, the infrastructure used in water transportation must be strong, durable, and efficient. Among the many materials available for water distribution networks, ductile iron pipes (DIP) have emerged as one of the most trusted and widely used solutions. Their unique combination of strength, flexibility, and corrosion resistance makes them an ideal choice for transporting water across long distances, both in urban and rural environments.

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2025-09-11

Effective Methods for Pipe Degreasing and Cleaning

In industrial production, pharmaceutical systems, petrochemical projects, and irrigation systems, pipes often accumulate oil, rust, and organic deposits during processing, transportation, and use. If not promptly removed, this not only reduces pipeline efficiency but can also lead to corrosion, blockage, and product contamination. Therefore, pipeline degreasing (degreasing) is a crucial process for ensuring pipeline cleanliness and extending its service life.

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2025-09-10

The difference between rebar and round steel

In the construction and steel industry, rebar and round steel are two common products that often appear similar at first glance. However, they serve different purposes, have distinct physical characteristics, and are used in specific application scenarios. Understanding the difference between rebar and round steel is essential for engineers, contractors, and buyers who want to select the right material for their projects.