Tono hua:
Ka whakamahia i roto i te wai matao ahumahi me te wai matao, te wai wera, te whakamahana, nga punaha pipeline hau wera, te punaha patu ahi, te paipa o te ra, me te paipa whakaurunga pokapū, etc.
Tautukunga Paerewa:
| GB/T 19228 YB/T 4204 |
| GB/T 12771 QB/T 2467 |
| JIS G3448 |
| EN 10312-3S |
