At present, welded tubes are mainly used for long-distance oil and gas transportation, and the pipeline steel pipes used for long-distance pipelines mainly include spiral submerged arc welded steel pipes (SSAW pipes) and straight seam double-sided submerged arc welded steel pipes (LSAW pipes). Since the spiral submerged arc welded pipe is made of strip steel, the wall thickness is limited, and the improvement of steel grade is limited by the heat treatment of the material. In addition, the spiral submerged arc welded pipe has some shortcomings that are difficult to overcome, such as long weld seam, large residual stress, and poor weld seam reliability. As the requirements for octg pipe are getting higher and higher, it is no longer used in densely populated areas and areas with high reliability requirements, and large diameter longitudinal welded pipes are gradually replacing spiral welded pipes.
Recently, China is speeding up the development of oil and gas in the East China Sea, with the development of oil exploration to the depths of the ocean. Due to the influence of pressure, impact force and bending force, the pipeline laid on the seabed is also flattened, which is the weak link of the spiral welded pipe. In order to improve the transportation capacity of pipelines and ensure the development of submarine pipelines in the direction of thick walls, longitudinal seam welded pipes are mostly used in submarine pipelines. Therefore, compared with spiral welded pipes, straight seam welded pipes have higher dimensional accuracy and easier repair welding, so from this aspect, straight seam welded pipes are also the first choice.
Coal slurry ore slurry and slurry pipelines need to use straight seam welded pipes, and pipeline transportation is "paste" pipeline transportation is the upward direction. Since the weld reinforcement of the spiral welded pipe is a spiral line, the resistance to the coal slurry is large, and the pipe needs a larger wall thickness, so the straight seam welded pipe is tended to be used.
Longitudinal welded pipes are required in machinery, construction, chemical and other industries. At present, the valve seat in the machinery industry uses forgings to process the inner hole, which is labor-intensive, time-consuming, and material-consuming. If thick-walled straight seam welded pipes are used, it will be more economical. In addition, due to the mechanical performance requirements of anti-flattening, only straight seam welded pipes are used for construction pipes; straight seam welded pipes are also desired for chemical pipes.
Article source: https://article-realm.com/article/Finance/41942-Significance-of-developing-straight-seam-submerged-arc-welded-pipe.html
Reviews
Comments
Most Recent Articles
- Sep 13, 2024 Why SIP in ELSS is a Win-Win for Tax Saving and Wealth Creation by sandeepkumar
- Sep 12, 2024 How Does the Portfolio Overlap Tool Work in Top Mutual Fund Software in India? by Wealth Elite
- Sep 5, 2024 Wealth management versus financial planning by Anna Paquin
- Sep 2, 2024 How Does the Compare Funds Feature in Mutual Fund Software Work? by Wealth Elite
- Aug 29, 2024 How Mutual Fund Software for IFA Helps in Selecting the Right Mutual Fund for Investors? by Wealth Elite
Most Viewed Articles
- 11085 hits How to Start an Invention Idea by Edwin Poul
- 9064 hits How to Download and Install Facebook Messenger on Firestick by Hope Mikaelson
- 2615 hits Brief discussion about Water by kavin prasath
- 2115 hits Importance of Proofreading While You Write an Assignment by clara
- 1891 hits Sleeping Pillow Market by Trisha Kumari
Popular Articles
In today’s competitive world, one must be knowledgeable about the latest online business that works effectively through seo services....
77367 Views
Are you caught in between seo companies introduced by a friend, researched by you, or advertised by a particular site? If that is the...
32686 Views
Walmart is being sued by a customer alleging racial discrimination. The customer who has filed a lawsuit against the retailer claims that it...
13709 Views
If you have an idea for a new product, you can start by performing a patent search. This will help you decide whether your idea could become the...
11085 Views
Statistics
Members | |
---|---|
Members: | 15316 |
Publishing | |
---|---|
Articles: | 63,054 |
Categories: | 202 |
Online | |
---|---|
Active Users: | 258 |
Members: | 0 |
Guests: | 258 |
Bots: | 7499 |
Visits last 24h (live): | 1670 |
Visits last 24h (bots): | 26729 |