5.4　Nozzles and Pressure Casing Connections

5.4.1　Nozzles and pressure casing connections shall be in accordance with clause 5.4 in ISO 13709-2003(API std 610-2014).

5.4.2　Standards,ratings and seal face types for the flanges shall meet the requirements specified in the data sheets.Comparison standards could be valid with purchaser written permission.The comparison of standards,such as GB/T 9115、GB/T17241、SH 3406、HG 20592、HG 20615、HG 20623、ASME B16.1、ASME B16.5、ASME B16.42、ASME B16.47 and EN1092,is shown on Annex C of this specification.

5.4.3　Unless approved by the purchaser in written,at rated flow,the flow velocity at suction and discharge nozzles shall be not higher than the figures shown in Table 1:

Table 1　Flow velocity limits in suction and discharge nozzles　Unit:m/s