history,steel,pipe,spiral,stee technology history of steel pipe


The huge variety of home school supplies available does notmake choosing what to buy easier – it makes it harder.  With so much choice and brands that promisethe earth and yet are often so like one another, parents are often left in aquand Today LED technology is replacing the technology of old traditional lights. If you are also planning to replace traditional florescentbulbs with LED tube lights on your own then here are some important tips, which will be helpful for you in


50 ~ 60 s, spiral steel pipe has been widely used in the oil and gas pipelines, 70 ~ 80 s by straight seam submerged arc welding steel pipe and the serious challenge of ERW steel pipe, since the world basically is no longer used in oil and gas pipeline spiral steel pipe, and pipe company has many large international oil company are not allowed to use spiral submerged arc welding steel pipe in oil and gas pipelines. This is because the development of pipeline industry reliability of steel pipe demand is higher and higher, and spiral steel pipe due to its manufacturing itself unable to overcome the defects, make it difficult to meet the requirements of objective development. Spiral pipe and straight seam submerged arc welding steel pipe compared in terms of quality has certain insufficiency, the following article summarizes seven for your reference.(1) spiral steel pipe manufacturing process to determine the residual stress is larger, according to foreign relevant data records, some even close to the yield limit, straight seam submerged arc welding steel pipe due to the expanding process, residual stress is close to zero.(2) the spiral seam welding tracking and ultrasonic on-line detection are more difficult, therefore, weld defects exceeding probability higher than straight seam submerged arc welding pipe.(3) the most amount of spiral steel pipe welding line fault in 1.1 ~ 1.2 mm, according to international practice 10% to less than the thickness of the wrong side of traffic, such as pipe wall thickness is small, the wrong side of quantity is difficult to meet the requirements, and straight seam submerged arc welding pipe without this problem.(4) compared with straight seam submerged arc welding pipe, spiral weld line is poorer, the stress concentration phenomenon is serious(5) spiral submerged arc welding steel pipe heat affected zone is greater than the straight seam submerged arc welding steel pipe, heat affected zone and heat affected zone is weak link welded pipe quality.(6) spiral seam welded steel pipe geometry size precision, brings to the site construction, such as the counterpart, welding) certain difficulties.(7) the same diameter, the thickness of the spiral seam welded steel pipe can reach is far less than the straight seam submerged arc welding steel pipe.

history,steel,pipe,spiral,stee

technology

Maximizing Your Experience with Patent Attorneys

When you have a product or service that you want to get patent rights on, you will need to use a patent attorney. This is the only way to make sure that no one else is stealing your idea from you.But there is one thing that you need to know ...

technology

How To Uninstall Tuneup Utilities On Windows

Tuneup utilities for windows 10 were developed by AVG to make the computer accelerate faster than ever before by cleaning up the cache files and the undesired files. However the concept didn't work well and users are trying to uninstall thi ...

technology

RPA: What Makes it Crucial for Software Testing

Automation has the potential to assist human beings in more ways than one could imagine. However, most of these applications for automation have been in the context of physical activity or some such. But what many people do not know yet is t ...

technology

HRMS Mobile Apps Drive Enterprise Mobility Today

The scenario in Enterprises is changing rapidly across the globe, with more and more Enterprises embracing the concept of enterprise mobility.A study shows that 71% of enterprises count mobility as a top priority to stay competitive. Wire19A ...

technology

How to Kill The Exploiter Orb in Warframe

Source: How to Kill The Exploiter Orb in WarframeExploiter Orb is the toughest boss in game that is hard to find and hard to kill. That is why an essential guide needs to kill him to earn huge rewards. Warframe has numerous missions that pl ...

technology

Which CMS is Better - WordPress vs Drupal?

WordPress and Drupal are the two widely used and best cms for developers all over the world. In order to create a website for your business, it is highly required to choose the right CMS platform that makes the best and attractive website.. ...