1. Pa materyèl:
Kabòn Steel: ASTM/ASME A234 WPB, WPC
Alyaj: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911, 15Mo3, 15CrMoV, 35CrMoV
Nerjaveèi: ASTM/ASME A403 WP 304-304L-304H-304LN-304N
ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti
ASTM/ASME A403 WP 321-321H
ASTM/ASME A403 WP 347-347H
Low Tanperati Steel: ASTM/ASME A402 WPL3-WPL 6
High Performance Steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70 Jete asye, asye alyaj, asye pur, kòb kwiv mete, alyaj aliminyòm, plastik, asfalt agon-bonded, PVC, PPR, RFPP (polypropylène ranfòse), elatriye.
2. Klasifye pa metòd fabrikasyon: pouse-fòme, bourade, fòje, jete, elatriye.
3. Klasifye pa estanda fabrikasyon: estanda nasyonal, estanda elektrik, estanda maren, estanda chimik, estanda dlo, estanda Ameriken, estanda Alman, estanda Japonè, estanda Ris, elatriye.
4. Klasifye pa reyon koube li yo: koud reyon long ak koud reyon kout. Yon koud reyon long gen yon reyon koube ki egal a 1.5 fwa dyamèt ekstèn tiyo a, sa vle di, R=1.5D; yon koud kout reyon gen yon reyon koub ki egal a dyamèt ekstèn tiyo a, sa vle di, R=1.0D. (D se dyamèt koud la, R se reyon koub la).
5. Si yo klase pa evalyasyon presyon, gen apeprè disèt kalite, ki se menm jan ak estanda tiyo Ameriken yo: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS; pami ki STD ak XS yo se pi souvan itilize yo.
