1. Mvura uye gasi chokufambisa simbi pombi (galvanized kana asina galvanized), akakandwa simbi pombi uye dzimwe pombi, pombi dhayamita inofanira kuratidzwa nezita dhayamita DN;

2. Seamless simbi pombi, welded simbi pombi (yakatwasuka kana spiral musono), mhangura pombi, Stainless simbi pombi uye dzimwe pombi, pombi dhayamita inofanira kuratidzwa nekunze dhayamita.× wall thickness;

3. Yakasimbiswa kongiri (kana kongiri) pombi, ivhu pombi, asidhi inodzivirira ceramic pombi, humburumbira mataira mapaipi uye mamwe mapaipi, pombi dhayamita inofanira kuratidzwa nepakati dhayamita d;

4. Pamapombi epurasitiki, iyo dhayamita yepombi inofanira kuratidzwa maererano nenzira yechigadzirwa chetsika;

5. Kana dhizaini inoshandisa zita rekuti DN kumiririra dhayamita yepombi, panofanira kunge paine tafura yekuenzanisa yezita reDN dhayamita uye zvinoenderana nechigadzirwa.