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What are the details of thick-walled steel pipes before use
The welding method of thick-walled steel pipes should be selected according to the material and wall thickness of thick-walled steel pipes. Because different welding methods have different arc heat and arc force, different welding methods have different characteristics. For ex...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 -
Analysis of the role of the steel flange
Steel flange is also called flange or flange. It is the part that connects the pipe to the pipe. connected to the pipe end. There are holes in the flange, and bolts can be worn to make the two flanges tightly connected. The flanges are sealed with gaskets. Flanged fittings ref...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 -
Use scope and characteristics of hot dip plastic steel pipe
Hot-dipped plastic composite steel pipes are suitable for coal mine gas extraction, ventilation systems, fire water supply systems, central air-conditioning HVAC circulating water pipes, industrial water supply and drainage, domestic water supply and drainage, gas and other ga...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 -
Straight seam steel pipe diameter expansion technology and common detection methods
Expanding technology of straight seam steel pipe: 1. Preliminary rounding stage: the fan-shaped blocks are opened until all the fan-shaped blocks touch the inner wall of the steel pipe. At this time, the radius of each point in the inner tube of the steel pipe within the step ...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