The quality standard specification for these products or pipes is the API 5L X46 PSL1. Since the requirements for the pipe API 5L X46 PSL2 is different from the PSL1, the testing parameters and requirements along with its mechanical and chemical properties. While it is compulsory that the PSL2 undergo impact test and non-destructive inspection, it is not required that the PSL1 undergo these tests or inspections.