Welding Principle of ERW Steel Pipe
High-frequency welding originated in the 1950s. It is a new type of welding process that uses the skin effect and proximity effect produced by high-frequency current to connect steel plates and other ...
Yearly Archives: 2022
Common Problems in High Frequency Welding and their Solutions
Common problems in high frequency welding and their causes and solutions:
⑴ Weak welding, desoldering, cold folding;
Reasons: 1. Mismatch between output power, pressure and speed. 2. The edge of...
Analysis of Main Causes of Gas Pipeline Leakage
There are many causes of gas pipeline leakage accidents. In an industrial system dominated by persified mechanisms, management and maintenance and construction quality are the main causes of gas pipel...
Application of Electric Resistance Welding in Industrial Production
Electric resistance welding (ERW) was invented at the end of the 19th century. It is a method of welding by applying pressure to the assembled weldment through electrodes and using the resistance heat...
LNG Markets will Recover Rapidly in 2021
According to a Rigzone report on January 1, LNG traders expect that LNG demand will recover rapidly in 2021 after the 2019 new crown pneumonia epidemic has caused significant price fluctuations.
Due ...
Is Seamless Pipe Stronger than Welded Pipe?
Seamless steel pipe has better pressure capacity, strength is higher than ERW welded pipe. So it is widely applied in high pressure equipment, and thermal, boiler industries. Generally the welding sea...
The Advancement and Superiority of Longitudinal Submerged Arc Welded Pipe
The vast majority of oil and gas pipelines in the world require the use of longitudinal submerged arc welded pipes (LSAW). Canada and other western developed countries have improved the technology of ...
Oil Casing Pipe itself has Corrosion Resistance
Petroleum casing pipe is an important device for petroleum drilling, and its main components also include drill pipes, core tubes and casings, drill collars, and small-diameter drilling steel pipes.
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Steel Grade Difference between Drill Pipe and Oil Casing Pipe
Casing Pipe:
Petroleum casing pipes are steel pipes used to support the walls of oil and gas wells to ensure the normal operation of the entire oil well after drilling and completion. Each well uses...
Four Production Processes of Seamless Steel Pipes
According to different production processes, seamless steel tubes can be pided into four categories: hot-rolled seamless steel tubes, hot-expanded seamless steel tubes, cold-drawn seamless steel tubes...
