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Production notes of SSAW steel pipe
During the production of SSAW steel pipes, attention must be paid to several critical factors. In addition to standard tests as specified by the API and other relevant standards, as well as specific user requirements, there are also destructive tests required for steel and steel pipes. These tests include evaluating the physical and chemical properties of raw materials, sampling, and conducting a 100% visual inspection of the steel.
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Wall thickness controlling of carbon steel seamless pipes
Carbon steel seamless pipes (CS seamless pipes) are widely used as structural materials in construction, manufacturing, and various other industries. Wall thickness control is a crucial aspect of their production, directly affecting the quality and performance of the steel pipes. This article introduces and analyzes the methods for controlling the wall thickness of carbon steel seamless pipes.
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GB9948 No. 20 seamless steel pipe for oil cracking
In the modern petrochemical industry, the use of seamless steel pipes is increasingly widespread. Among these, the No. 20 seamless steel pipe for petroleum cracking stands out with its excellent performance and broad application fields. This article explores the material characteristics, production process, and application areas of the No. 20 seamless steel pipe for petroleum cracking.
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Spiral steel pipe connection skills
Spiral steel pipes, also known as SSAW pipes, are welded pipes made from strip steel coils, extruded at regular temperatures, and welded using an automatic double-wire double-sided submerged arc welding process. The quality of the joint in spiral steel pipe construction directly affects the connection strength and sealing of the pipe. Here are some operating tips and key considerations for achieving a seamless joint without misalignment.
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Difference between large-diameter SSAW steel pipe and LSAW steel pipe
Large-diameter spiral steel pipes and large-diameter straight seam steel pipes are both crucial types of welded steel pipes, playing a significant role in various national industries and everyday life. Despite their similarities, these two types of pipes differ notably due to their distinct production processes. Below, we will discuss these differences in detail.
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The material and use of straight seam steel pipe
This article will briefly introduce the material and use of straight seam steel pipe.
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The damaged form of SSAW steel pipe surface
SSAW (Spiral Submerged Arc Welding) steel pipes are protected by a very thin, stable layer of fine chromium-rich oxide film. This protective film prevents oxygen atoms from penetrating the steel, thereby providing oxidation resistance and anti-corrosion properties. However, if this film is damaged, air or liquid oxygen can penetrate, causing the iron atoms to oxidize and leading to surface corrosion. There are several common ways this protective film can be damaged.
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The casing and tubing pipe grades
The API 5CT standard encompasses both seamless and welded casing and tubing pipes used for oil and gas transportation. This article will briefly introduce the casing and tubing pipe grades.
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Carbon seamless steel pipe surface roughness standard
Carbon steel seamless steel pipe (CS SMLS pipe) is manufactured through cold drawing (extrusion) and hot rolling processes. These pipes do not require welding, offering good surface flatness and high dimensional accuracy in both inner and outer diameters. They can withstand high pressure and are widely used in petroleum, chemical, aviation, and light industry sectors.
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Eddy current nondestructive testing method for spiral welded steel pipe
Pipeline transportation is an increasingly crucial method for the efficient transport of oil and gas. In China, large-diameter transportation pipelines predominantly use spiral welded steel pipes due to their mature manufacturing processes and low costs. However, to ensure the reliable operation of these pipelines, it is essential to strictly guarantee the quality of the spiral steel pipes used.
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