SSAW Steel pipe has been produced for about 150 years. The pipe sizes that are in use today in PVC and galvanized were originally designed years ago for steel pipe. The number system, like Sch 40, 80, 160, were set long ago and seem a little odd. For example, Sch 20 pipe is even thinner than Sch 40, but same OD. And while these pipes are based on old steel pipe sizes, there is other pipe, like cpvc for heated water, that uses pipe sizes, inside and out, based on old copper pipe size standards instead of steel.
Many different standards exist for pipe sizes, and their prevalence varies depending on industry and geographical area. The pipe size designation generally includes two numbers; one that indicates the outside (OD) or nominal diameter, and the other that indicates the wall thickness. In the early twentieth century, American pipe was sized by inside diameter. This practice was abandoned to improve compatibility with pipe fittings that must usually fit the OD of the pipe, but it has had a lasting impact on modern standards around the world.
|Product name||Spiral submerged arc welding steel pipe|
|Standard||API 5L, GB/T9711, (conveying oil and gas standard)|
|Grade||B,X42,X52,X60,X65,X70 , Q235, L245, L290, L360, L415, L455|
|application||As conveyer pipe in the fields of petroleum , heat, and natural gas, construction pipe, ground piling pipe|
|Technique||Double sides submerged arc welding steel pipe|
|Certificate||ISO9001:2008, API SPEC 5L|
|Package details||in bundles, case packing, or bulk pack|