â¢ Surname is the family name or the last name of a person, whereas first name is the unique name given to a person at birth, also referred to as his Christian name. â¢ Surname is passed down generations, whereas first names are unique depending upon physical attributes or circumstances at birth of a kid.
PVC pipe is available in a wide range of wall thicknesses and strengths (pipe. stiffness). PVC pipe is routinely perforated (slotted) and used as well screen. This same slotted pipe can also be used for toe drains. Slotting is done at the. factory, and slots are available in a wide range of slot widths and POA.
The pipe making capacity for spiral pipe has grown substantially over time. In major producing countries, like the U.S. and Turkey, the spiral pipe making capacity is far larger than the straight seam pipe making capacity.he real issue is not whether a pipe is helically welded or longitudinally welded; the issue is who made the pipe and what technology was used with what experience â regardless whether it is longitudinally or helically welded pipe.