Product Information
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Application of straight seam steel pipes in pressure pipelines
1. Definition of straight seam steel pipe pressure pipe: By definition, straight seam steel pipe pressure pipe should include all straight seam steel pipe pipes that use pressure to transport gas or liquid. From the point of view of production, it follows the name of a straigh...Read more -
Causes of Uneven Wall Thickness of Spiral Seam Submerged Arc Welded Steel Pipe
The wall thickness of the spiral seam submerged arc welded steel pipe is uniform, it looks good, the force is uniform, and it is durable. The wall thickness of the spiral seam submerged arc welded steel pipe is uneven, and the steel pipe is unevenly stressed. A phenomenon that...Read more -
What are the casting measures of stainless steel pipe fittings
1. Since the casting shrinkage of stainless steel pipe fittings is much higher than that of cast iron, to prevent shrinkage cavities and shrinkage defects in castings, measures such as risers, cold iron, and subsidies are mostly used in the casting process to achieve sequentia...Read more -
Details of high frequency welding of straight seam steel pipe
High-frequency welding process: Straight seam steel pipe is a steel pipe made by rolling a long strip of a certain specification into a round pipe through a high-frequency welding unit and welding the straight seam. The shape of the steel pipe can be round, square, or irregula...Read more -
The difference between cast steel flange and forged steel flange
The cast steel flange has an accurate blank shape and size, a small processing amount, and low cost, but has casting defects (pores, cracks, inclusions); the internal structure of the casting is poorly streamlined (if it is a cutting part, the streamlined form is even worse); ...Read more -
Connection problems between steel pipe fittings
Steel pipe fittings are parts that connect tubes to pipelines. According to the connection method, it can be divided into four categories: socket fittings, threaded fittings, flanged fittings, and welded fittings. Mostly made of the same material as the pipe. There are elbows ...Read more -
Introduction of anti-corrosion on the inner wall of large-diameter steel pipes
1. Before processing all steel pipes, the steel plate on the inner wall side of the large-diameter steel pipe shall be de-rusted until the metal is exposed to metallic luster (whitening). It should meet the sa2.5 standard required in GB8923-88 of “Steel Surface Corrosion...Read more -
The purpose of preheating the pipe before welding the spiral steel pipes
Critical components of alloy steel and thick parts must be preheated before welding. The purpose of preheating before welding spiral steel pipes is as follows: (1) Preheating can slow down the cooling rate after welding, make hydrogen diffuse in the weld metal and escape, and ...Read more -
Submerged arc steel pipes high-frequency welding process
1. The control of the weld gap: the strip steel is sent to the welded pipe unit after rolling by multiple rollers. The strip steel is gradually rolled up to form a circular tube blank with an opening gap. Adjust the reduction of the extrusion roller to control the gap between ...Read more