Construction

The slotted casing pipes using in oil exploration can prevent 99% sand, decrease 80% of oil well heavy maintenance, as well increase the strength of the oil well, integrality and stability of keeping sand off.

ASTM A213 Stainless Steel 304H Boiler Tubes has general corrosion resistance similar to the low carbon 304/304L.

ASTM A519 covers several grades of carbon and alloy steel seamless mechanical tubing,either hot-finished or cold-finished.

Electric Resistance Welded (ERW) pipe is manufactured by cold forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam. The two edges are then simultaneously heated with a high frequency current and squeezed together to form a bond. The longitudinal ERW seam does not require filler metal.