Company News

2025-10-23

API 5B Thread Pup Joints

In the oil and gas industry, reliable connections between pipes are critical for the efficiency and safety of drilling and production operations. One essential component that ensures smooth pipe connection is the Pup Joint. When combined with API 5B threads, these joints achieve high precision, strong sealing performance, and excellent interchangeability. API 5B Thread Pup Joints are widely used in tubing, casing, and drill pipe systems to adjust string length, facilitate maintenance, and ensure tight and secure connections.

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2025-10-22

ASTM A105 Pipe Fitting Specifications

ASTM A105 is a standard specification for forged carbon steel flanges and fittings, primarily defining their materials, performance, and operating conditions. It is widely used in both ambient and high-temperature pressure piping systems, such as those transporting steam, oil, gas, or chemical media.

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2025-10-21

What Is the Difference Between Cast Iron and Ductile Iron?

Cast iron refers to an iron-carbon alloy with a carbon content of 2% or more. Industrial cast iron typically contains 2% to 4% carbon. Carbon in cast iron primarily exists as graphite, sometimes as cementite. In addition to carbon, cast iron also contains 1% to 3% silicon, as well as elements such as manganese, phosphorus, and sulfur. Ductile iron is obtained by spheroidizing molten gray cast iron. The resulting graphite is spherical, often referred to as ductile iron. Compared to ordinary gray cast iron, it has higher strength, better toughness, and greater plasticity. It is used in the manufacture of internal combustion engines, automotive parts, and agricultural machinery.

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2025-10-20

Difference Between ASTM and ASME Standards

In the engineering and manufacturing world, two names often appear together when referring to material standards — ASTM and ASME. Although both play a crucial role in ensuring product quality and safety, their functions, focus areas, and applications differ significantly. Understanding the distinction between ASTM and ASME standards is essential for engineers, procurement specialists, and manufacturers who work with metals, mechanical systems, and pressure equipment.

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2025-10-17

Difference Between C Channel and I Beam

In steel structure construction, choosing between C-shaped steel (C Channel) and I-shaped steel (I Beam) is a critical decision, as it directly impacts both structural safety and cost.While both types of steel are commonly used load-bearing components, they differ significantly in cross-sectional shape, load-bearing capacity, stiffness, and applicable range.

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2025-10-16

What’s the difference between HFW and LSAW pipes?

In the modern steel pipe industry, two of the most commonly used types of welded pipes are HFW (High-Frequency Welded) pipes and LSAW steel pipes. Both play critical roles in the oil and gas, construction, and infrastructure sectors, but their manufacturing processes, performance characteristics, and applications differ significantly.

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2025-10-15

ASTM A53 pipe bend and flattening test

When purchasing ASTM A53 welded or seamless steel pipe, customers are always most concerned about: Is the pipe reliable? Can it withstand the pressure and deformation under actual service conditions? The ASTM A53/A53M standard not only specifies chemical composition and mechanical properties but also clearly defines two key physical tests: the bend test and the flattening test. These two tests directly verify the ductility, toughness, and weld quality of the steel pipe, preventing serious accidents such as breakage and leakage during use.

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2025-10-14

Flange Connections and Production Standards

A flange connection involves securing two pipes, fittings, or equipment to a flange. A flange gasket is placed between the two flanges and bolted together to complete the connection. Some pipe fittings and equipment already have built-in flanges, which also constitute a flange connection. Flange connections are a key connection method in pipeline construction.

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2025-10-14

What is Circular Hollow Section (CHS)?

In modern engineering construction and machinery manufacturing, a seemingly simple yet crucial material—circular hollow section (CHS)—plays an indispensable role. Whether it's the skeleton of a skyscraper, the support of a cross-sea bridge, or the structure of an automobile chassis, CHS, with its unique circular hollow section design, perfectly balances the two core requirements of lightweighting and high strength.

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2025-10-13

Hot Pressed Elbow VS Stamped Elbow

Elbows are pipe fittings used at pipe bends. Common processes for forming seamless elbows include hot pressing, stamping, and extrusion. Do you know the difference between hot-pressed and stamped elbows? Let's take a look!

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2025-10-11

How to Extend the Service Life of Seamless Steel Pipes

With the rapid development of the construction industry, the demand for seamless steel pipes is increasing. When using these products, people hope to fully utilize their capabilities, increase their utilization rate, and extend their service life. How to effectively extend the service life of seamless steel pipes is a question that many people are concerned about.

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2025-10-10

What is the difference between HSS and SHS?

Hollow structural sections (HSS) have become an indispensable material in modern construction and engineering. HSS is a broad term encompassing structural steel tubes of various cross-sectional shapes, including square, rectangular, circular, and oval shapes. These hollow sections are manufactured through cold-formed forming and welding processes, resulting in structural members with a hollow cross-section that combine lightweighting with high strength. In contrast, square hollow sections (SHS) are a specific subcategory of HSS, specifically those with a square cross-section.