DAEHAN STEEL LTD., is a large scale enterprise mainly focusing on the producing. domestic distribution and export of steel products. established in 2014, Daehan steel covers a land area of 60,000 square meters with registered capital 5 million dollars. with the great surport from customers in china and abroad, our business scope becomes wider and greater, and accomplished excellent achievements in and accomplished excellent achievements in steel trading since established. 

The main products of our company include: structural steel, wire rod, pipes, hr coils/plates, deformed steel bars, square bars and galvanized products. our company's structural steel products are unique competitive. there are jis standard, astm standard and en standard for angle bar, u-channel, h-beam, i-beam, and flat bars. 

We are firmly conviced that we will have a much more promising future together

Product name: Welding Cylinder Steel
Standards: AISI, ASTM, BS, DIN, GB, JIS
Place of origin: Tianjin, China (Mainland)

● We can provide factory price with trading company services

● We control production quality very strictly to keep none compensation

● We guarantee 24 hours response and 48 hours solution providing service

● We accept small order quantity before formal cooperation

● We offer good quality with reasonable price, faster delivery with better payment terms

● We are ALIBABA credit checked supplier

● We offer ALIBABA trade assurance to protect your payment, product quality and on-time delivery

Stainless Steel Tank is made mostly on the rotating table. The floor is placed first, then the wall is placed over and supported by the overhead crane and small tacking welds with TIG are placed, to hold the floor and the wall. Next the roof is placed onto the wall and small tacking welds with TIG are placed to hold in place the roof.

Now the welder will continue to rotate the Stainless Steel Tank and he will add more and more small tacking welds with TIG. His job is to slowly make the gap between the tacking welds, get less and less. When the gaps in the weld are 25mm each, he can MIG weld the top and the bottom to the wall.

This is done when the welder is seated and the Stainless Steel Tank is slowly rotated at the exact speed. The MIG welder is supported next to the welder hand the hand piece is held also. The welder will only need to press the trigger and swivel the tip closer to the welding pieces. Now it is automatic because the Stainless Steel Tank will rotate and the welder controls the MIG hand piece. Inside the tank there is another man who is purging the weld.

when a welder is MIG or TIG welding such things as the floor, roof, butterfly valves onto outlet tubes and reducers, it is necessary to apply the same welding gas to the inside of the welding area to remove (purge) any oxygen (air) from the hot area inside. If this is not done the hot metal will oxidize and the surface quality is very poor. With purging of the weld, the weld quality inside is very good and will not need to be repaired.

Purging, covering the weld root and adjacent parent material with a shielding gas in order to protect the penetration bead from becoming contaminated by coming into contact with atmospheric gases during and after welding; temper colors can be prevented or greatly reduced from the outset. Purging is an economical, clean and environmentally friendly method to present a good welding appearance.

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