Orifice plates can be designed and calculated in accordance with any required standard.
Den Holder standard plates are designed according ISO 5167 in case of flow measurement, and Spink or RW Miller in case of Restriction Orifice.
Gasket Contact Surface is RF or RTJ.
Den Holder Orifice Plates are manufactured in Stainless Steel 316, 316L, or UNS S31803 (duplex), UNS S32750/32760 (super duplex), Monel, Hastelloy, Titanium and all with material certificates 3.1, or 3.2.
Of course, all other materials, including material certificates, are possible, as well as other designs and standards, such as API or JIS.
The Orifice diameter is being machined within a tolerance of 0,02mm. The bore diameter will be stamped in the tagplate so the exact dimensions can be used in the flow computer. Strength calculations can be provided to check the thickness against pressure loss over the plate.
Since base materials are in stock for the most common sizes, prices can be kept low and delivery times are short. Rush deliveries can even be made the same day.