The D series of stainless steel manways includes round pressure manholes with diameters from DN150 to DN700. For this series, the basic steel used for the manway's structural components is AISI 316L (1.4404).
Round pressure manways of the D series meet the criteria specified in the PED 2014/68/EU directive. In addition, diameters from DN460 to DN700 are manufactured in compliance with strict hygienic standards (3-A). As a result, these manways are used in food production applications.
Round pressure manways of the D series have been developed for installation in various types of pressure vessels, reactors and autoclaves. Of course, nothing prevents their use also in other process equipment made of stainless and acid-resistant steel. However, the pressure and environmental parameters and their effect on the materials used to manufacture the manway should always be taken into account.
We use cookies