The Principle of Submerged Arc Welding

Submerged arc welding (SAW) is a method that burning under flux layer to weld. SAW is one of the most occurring arc welding process. It needs a electrode which may be solid of tubular. The electrode should be used in a continuous approach. It should be fed continuously.Flux refers to a material that can thaw the formed slag and gas when welding, and has the protection and metallurgical treatment to melt metals.The wire is the material that as a filler metal or as a conductive wire for welding.

Submerged arc welding is commonly used to manufacture LSAW steel pipe and SSAW steel pipe, and those two kinds of steel pipe are widely used in various kinds of production and transportation activities. The main feature of submerged arc welding is that the weld and the arc area is protected from environmental contamination by the application of a granular flux which is fusible. The weld pool is protected by a blanket of flux. So that area is actually submerged under that flux. When temperature rises and molten the flux becomes conductive. And thus this creates a path for electron flow between electrode and workpiece. SAW or Submerged Arc welding can be done by manual procedure or automatic process. But it can be done by semi-automatic process where welding gun is hold by hand.

Submerged Arc Welding Process of SSAW Steel Pipe

SSAW steel pipe refers to the metal pipe with spiral seam that using submerged arc welding process to weld. There are complete production line of SSAW steel pipe in Prime Steel Pipe, we are positioned as a steel pipe manufacturer and exporter for spiral welded pipe. If there is a need, please contact us without hesitation, we will do our best to meet your requirement.

Submerged arc welding (including submerged arc welding and electroslag welding, etc.), its full name is submerged automatic arc welding, it is a kind of method that arc burns under the flux layer to weld. Its inherent advantages (including stable welding quality, high welding productivity, no arc and few dust, etc.) makes it become the main welding methods used in pressure vessel, pipe section manufacturing, box beam and other important steel structure production.

Advantages of SSAW steel pipe:

1. High production efficiency. On the one hand, the wire length is shortened, the current and current density are improved, therefore, the penetration depth of the arc and the deposition efficiency of the welding wire are greatly improved. Generally, single-sided melting depth of can be up to 20mm if do not open the groove. On the other hand, due to thermal insulation of flux and slag, the arc basically has no loss of heat radiation, welding spatter is also few. Although the heat loss for melting the flux is increased, the overall thermal efficiency is still greatly increased.
2. High quality of weld seam. The protective effect of the slag from the air is good, the welding parameters can be stabilized by automatic adjustment, the requirement of the welder's technical level of is not high, the composition of weld seam is stable and the mechanical performance is better.
3. Good working conditions. In addition to reducing the labor intensity of manual welding operations, it does not have arc radiation, which is the unique advantage of submerged arc welding.

Disadvantages of SSAW steel pipe:

The flexibility of submerged arc welding is not as good as manual welding, it is generally only suitable for the weld seam that in horizontal position or small gradient. Workpiece edge preparation and assembly quality requirements are higher, which is cost more working time. Due to using submerged arc welding, we can not see the bath and weld formation process, so the welding specification must be strictly controlled.

Submerged Arc Welding Straight Seam Welded Steel Pipe Beveling Process

In submerged arc welding straight seam welded steel pipe beveling process, the general use

LSAW unit, LSAW pipe mill uses advanced milling technology of floating plate plate edge processing. Plate under the action of the automatic alignment device processing center line, and then in the submerged arc welding straight seam welded steel pipe beveling process, the general use LSAW unit, LSAW pipe mill using advanced milling processes floating plate plate edge processing.

SAW straight seam welded steel pipe beveling process

Plate under the action of the automatic alignment device processing center line, then pulled by a gripping means uniform feed milling device mounted on both sides of the swing axis, guided by the floating-tracking device to follow the edge of the floating plate. When the plate edges appear wavy or bent when, under the action of the float, milling Milling operations can be performed while maintaining the relative position of the edge of the plate under the same conditions, to ensure longitudinal submerged arc welding straight seam steel pipe welding groove uniformity.

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

Submerged Arc Welding Straight Seam Welded Steel Pipe Beveling Process

In submerged arc welding straight seam welded steel pipe beveling process, the general use

LSAW unit, LSAW pipe mill uses advanced milling technology of floating plate plate edge processing. Plate under the action of the automatic alignment device processing center line, and then in the submerged arc welding straight seam welded steel pipe beveling process, the general use LSAW unit, LSAW pipe mill using advanced milling processes floating plate plate edge processing.

SAW straight seam welded steel pipe beveling process

Plate under the action of the automatic alignment device processing center line, then pulled by a gripping means uniform feed milling device mounted on both sides of the swing axis, guided by the floating-tracking device to follow the edge of the floating plate. When the plate edges appear wavy or bent when, under the action of the float, milling Milling operations can be performed while maintaining the relative position of the edge of the plate under the same conditions, to ensure longitudinal submerged arc welding straight seam steel pipe welding groove uniformity.

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.