To ensure that the welded steel pipe in the winter welding perfect follow the following steps:First, increase the welding current welding, slow d...
To ensure that the welded steel pipe in the winter welding perfect follow the following steps:First, increase the welding current welding, slow down the welding speed, the appropriate increase in the cross-sectional area and length of the weld, if necessary, preheat.Second, not outside the groove on the base metal to start arc, arc extinction to be filled when the pit.Third, as far as possible not in low temperature conditions for bending, correction and assembly weldments.Fourth, preheating before welding, welding process to strictly maintain the interlayer temperature should not be lower than the preheating temperature of coating steel pipe.Fifth, the use of low hydrogen or ultra-low hydrogen welding materials.Six, the entire weld should be finished as far as possible to avoid interruption.
Difference of PSL1 and PSL2(API 5L)
The API 5L has two standards, PSL1 and PSL2, which are very different from each other. I'll talk more about the differences between PSL1 and PSL2.
Production Process of Pipe Fitting
There are many kinds of processing methods for pipe fittings.
The Future of Steel Pipe Development
The future of steel pipe development is looking promising, according to expert analysis and data. The price of carbon steel pipe is predicted to bounce back this year, with China leading the way in increasing steel consumption demands. This is due to a series of government initiatives aimed at stimulating domestic demand, including the construction of affordable housing and infrastructure projects. The demand for structural steel pipe is also on the rise, thanks to state investment in housing and engineering projects. With private investment projects also gaining popularity, the steel pipe market is set to thrive in 2017.
