Steel casing pipe is also known as encasement pipe as it is most commonly used to enclose or encase underground utility lines. This pipe can be used for horizontal or directional boring under streets, highways, driveways, lakes, rivers, and streams. The most popular use for steel casing pipe is to surround and protect smaller carrier pipes for utilities such as water mains, natural gas lines, electrical lines, and communication lines. Steel casing can also be used in a variety of construction projects.
Types of Steel Casing
Straight Seam Steel Casing Pipe: Straight seam steel casing pipe is so called because the pipe is rolled from strip and formed with one longitudinal weld . This straight seam steel casing pipe is generally manufactured by an Electric Weld or a DSAW type of manufacture. This steel casing pipe is available in a variety of thicknesses and grades depending on your application. This DSAW pipe is formed by first rolling steel plates into cylindrical shapes. The edges of the rolled plate are then shaped so that V-shaped grooves are formed on the interior and exterior surfaces at the location of the seam. The pipe seam is then formed with a single pass of an arc welder on the interior and exterior surfaces and the welding arc is submerged under flux. A main benefit of using this process when making steel casing is that the welds penetrate 100% of the pipe wall and produces a very strong bond. ERW pipe is similar but fused together instead of welded.
Spiral Welded Steel Casing Pipe: This steel casing pipe is a very durable and economical product that gives your project the long lasting reliability you require. The weld seam on spiral weld pipe is in a spiral around the pipe, said to be like a barberpole style This pipe can be manufactured to meet a specific outer diameter, wall thickness, grade, steel strength, and length.
Rolled and Welded Steel Casing: Rolled and Welded steel casing pipe is created by rolling and welding larger diameter pipe cylinders from steel plate, and then welding those cylinders into a longer lengths as needed. This rolled and welded steel pipe type of manufacture is generally used to make large diameter steel casing pipe, these are more “specialty” sizes and not made generally in large production capacity. The general size range starts at 30” diameter on up to very large diameter steel casing pipe.