... End: Welding-ring or threaded ends. Standard designs for installation depths of 100, 200, 350 and ... 5. Trapezoidal wire filter pipe is easy for washing, long service life, safe, reliable, comprehensive and low cost ... Lengths: 6Mts.&3Mts Grades: different grades suitable for tube well depths up to 300ft.,600ft.,900ft. ... the abrasion of the pump 4. Extend the life span of wells, low-carbon, Galvanized or ...