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By certification 
| Standard | ISO2531，EN545，EN598 |
| Pressure | PN10/PN16/PN25/PN40 |
| Body material | Ductile iron |
| Coating | a). Inside cement mortal lining as per ISO4179 , outside zinc primer black bitumen as per ISO8179 ; |
| b). Inside and outside with FBE ( fusion bonded epoxy) coating or Epoxy painting ; | |
| c). Inside and outside with Epoxy painting ; | |
| d). Inside and outside wih zinc primer black bitumen. | |
| Gaskets are SBR, NBR or EPDM; | |
| Bolts and Nuts | Carbon steel with galvanized zinc plated G4.8/G8.8, or SS304/SS316. |
| Package | Wooden cases and protection layer. |
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