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Length description of large diameter steel pipe
1. Normal length (also called non-fixed-length length): Any length that is within the length specified by the standard and no fixed length is required is called normal length. For example, the structural pipe standard stipulates hot-rolled (extruded, expanded) steel pipe 3000mm~12000mm; cold draw...Read more -
Protection method for back side of weld seam of argon arc welding of stainless steel pipeline
Protection method for back side of weld seam of argon arc welding of stainless steel pipeline 1. The tube is filled with argon for protection For argon arc welding of stainless steel pipes in petrochemical plant engineering, the method of filling the pipe with argon is generally used to prevent o...Read more -
Laying knowledge of thin-walled stainless steel pipes
When laying thin-walled stainless steel pipes, they should be installed after the civil works are finished. Before installation, first, check whether the position of the reserved hole is correct. When laying thin-walled stainless steel pipes, the distance between fixed supports should not be grea...Read more -
Main points of processing technology of large diameter straight seam steel pipe
①The large-diameter square tube, tooth shape, and pitch of the wire head of the processed steel reinforcement thread are consistent with the tooth shape and pitch of the connecting sleeve, and the matching gauge has passed the inspection. ②When processing reinforced threads, water-soluble cutting...Read more -
Winding 3PE anti corrosive steel pipe
3pe anti-corrosive steel pipes are pipes (steel pipes) used in different working environments. To slow down or prevent the pipes from being corroded and deteriorated by the chemical or electrochemical action of the external medium or by the metabolic activities of microorganisms, the outer wall o...Read more -
How to weld a thin metal cover to a thicker steel pipe by using MIGW or flux-cored gas shielded welding
Reason analysis: If the welding current cannot be adjusted correctly during welding, two situations may occur: one is to reduce the welding current to prevent the thin metal from burning through. At this time, the thin metal cover cannot be welded to the thick steel pipe; the other is welding Exc...Read more -
Precautions for welding stainless steel pipe
Precautions for welding stainless steel pipe 1. Power supply with vertical external characteristics is adopted, and the positive polarity is adopted for direct current (the welding wire is connected to the negative electrode). 2. Generally suitable for the welding of thin plates below 6mm, with t...Read more -
Sealing and bonding of stainless steel pipeline
Sealing and bonding of stainless steel pipeline The sealing ring is arranged on the inner end surface of the socket of the pipe body, and a glue injection hole is opened on the socket of the pipe body. After the pipe is inserted into the socket of the pipe fitting body and passes through the seal...Read more -
Installation process requirements for stainless steel pipes
The installation method of stainless steel pipe is the same as that of ordinary carbon steel, and the subsequent process requirements are required in some processes. 1. The stainless steel material should not be in direct contact with other metal and should be padded with non-metallic materials s...Read more -
Anti corrosion of buried steel pipes in urban sewage
Several methods can be used for anti-corrosion of urban sewage buried pipelines: 1. Petroleum bitumen-glass fiber cloth coating This kind of anti-corrosion method was used more in oil pipelines, but it is now being eliminated. Its advantages are wide sources of raw materials and low cost. The dis...Read more -
Stainless steel heat treatment operation
Stainless steel heat treatment operation Cleaning: 1. Workpieces and fixtures should be cleaned of foreign objects such as oil, residual salt, paint, etc. before heat treatment 2. The fixture used for the first time in the vacuum furnace should be degassed and purified in advance of a vacuum degr...Read more -
Common methods of steel pipe
Common methods of steel pipe 1. Forging method: Use a swage forging machine to punch out the end or part of the pipe to reduce the outer diameter. Commonly used swage forging machines include rotary, connecting rod, and roller types. 2. Stamping method: Use a tapered core on the punch to expand t...Read more