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A487 GR 4C instead of A216 GR WCB

A487 GR 4C instead of A216 GR WCB

A487 GR 4C instead of A216 GR WCB

(OP)
Hello Specialists;
Can ASTM A487 Gr 4C be alternative material (valve body material ) to A216 WCB specified in Client Piping Material specification?
In other words the problem is as follows: Client piping specification stipulates A216 WCB as check valve body matrial. Vendor is propsing  A487 Gr 4C.
Shall I accept or not?
Service: Gas injection
design pressure: 450 bars@70°C
Gas: Not coorosive
Design code : B31.3

Thank you in advance

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